General Description
The MAX6173–MAX6177 are low-noise, high-precision
voltage references. The devices feature a proprietary
temperature-coefficient curvature-correction circuit and
laser-trimmed thin-film resistors that result in a very low
3ppm/°C temperature coefficient and excellent ±0.06%
initial accuracy. The MAX6173–MAX6177 provide a
TEMP output where the output voltage is proportional to
the die temperature, making the devices suitable for a
wide variety of temperature-sensing applications. The
devices also provide a TRIM input, allowing fine trimming
of the output voltage with a resistive divider network. Low
temperature drift and low noise make the devices ideal
for use with high-resolution A/D or D/A converters.
The MAX6173–MAX6177 provide accurate preset +2.5V,
+3.3V, +4.096V, +5.0V, and +10V reference voltages and
accept input voltages up to +40V. The devices draw
320μA (typ) of supply current and source 30mA or sink
2mA of load current. The MAX6173–MAX6177 use
bandgap technology for low-noise performance and
excellent accuracy. The MAX6173–MAX6177 do not
require an output bypass capacitor for stability, and are
stable with capacitive loads up to 100μF. Eliminating the
output bypass capacitor saves valuable board area in
space-critical applications.
The MAX6173–MAX6177 are available in an 8-pin SO
package and operate over the automotive (-40°C to
+125°C) temperature range.
Applications
ADCs Voltage Regulators
DACs Threshold Detectors
Digital Voltmeters
Features
oWide (VOUT + 2V) to +40V Supply Voltage Range
oExcellent Temperature Stability: 3ppm/°C (max)
oTight Initial Accuracy: 0.05% (max)
oLow Noise: 3.8µVP-P (typ at 2.5V Output)
oSources up to 30mA Output Current
oLow Supply Current: 450µA (max at +25°C)
oLinear Temperature Transducer Voltage Output
o+2.5V, +3.3V, +4.096V, +5.0V, or +10V Output
Voltages
oWide Operating Temperature Range: -40°C to
+125°C
oNo External Capacitors Required for Stability
oShort-Circuit Protected
PART TEMP RANGE PIN-
PACKAGE
OUTPUT
VOLTAGE (V)
TEMPERATURE COEFFICIENT
(ppm/°C) -40°C TO +125°C
INITIAL
ACCURACY (%)
MAX6173AASA+ -40°C to +125°C 8 SO 2.500 3 0.06
MAX6173BASA+ -40°C to +125°C 8 SO 2.500 10 0.10
MAX6174AASA+ -40°C to +125°C 8 SO 4.096 3 0.06
MAX6174BASA+ -40°C to +125°C 8 SO 4.096 10 0.10
MAX6174BASA/V+ -40°C to +125°C 8 SO 4.096 10 0.10
MAX6175AASA+ -40°C to +125°C 8 SO 5.000 3 0.06
MAX6175BASA+ -40°C to +125°C 8 SO 5.000 10 0.10
MAX6175BASA/V+ -40°C to +125°C 8 SO 5.000 10 0.10
MAX6176AASA+ -40°C to +125°C 8 SO 10.000 3 0.05
MAX6176BASA+ -40°C to +125°C 8 SO 10.000 10 0.10
MAX6177AASA+ -40°C to +125°C 8 SO 3.300 3 0.06
MAX6177BASA+ -40°C to +125°C 8 SO 3.300 10 0.10
19-3249; Rev 5; 9/14
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
IN
OUT
GND
*OPTIONAL.
* *
*
(VOUT + 2V) TO 40V INPUT
REFERENCE
OUTPUT
TRIM
TEMP
MAX6173–MAX6177
Typical Operating Circuit
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
2Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN to GND ...............................................................-0.3V to +42V
OUT, TRIM, TEMP to GND...........................-0.3V to (VIN + 0.3V)
Output Short Circuit to GND .....................................................5s
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW
Operating Temperature Range ........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°C
ELECTRICAL CHARACTERISTICS—MAX6173 (VOUT = 2.5V)
(VIN = +5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
MAX6173A (0.06%) 2.4985 2.5 2.5015
Output Voltage VOUT No load, TA = +25°CMAX6173B (0.1%) 2.4975 2.5 2.5025 V
Output Adjustment Range ΔVTRIM RPOT = 10kΩ±3±6%
MAX6173AASA 1.5 3Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT TA = -40°C to +125°C
MAX6173BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ΔVOUT / ΔVIN 4.5V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10 ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C 50 500
Load Regulation (Note 3) ΔVOUT /
ΔIOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C 90 900
ppm/mA
OUT shorted to GND 60
Output Short-Circuit
Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
ΔVOUT/
cycle 120 ppm
Long-Term Stability ΔVOUT/
time 1000 hours at TA = +25°C 50 ppm
DYNAMIC
f = 0.1Hz to 10Hz 3.8 μVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 6.8 μVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF 150 μs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 4.5 40.0 V
TA = +25°C 300 450
Quiescent Supply Current IIN No load TA = -40°C to +125°C 600 μA
TEMP OUTPUT
TEMP Output Voltage VTEMP 570 mV
TEMP Temperature
Coefficient TCTEMP 1.9 mV/°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS—MAX6177 (VOUT = 3.3V)
(VIN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
MAX6177A (0.06%) 3.2980 3.3 3.3020
Output Voltage VOUT No load, TA = +25°CMAX6177B (0.1%) 3.2967 3.3 3.3033 V
Output Adjustment Range ΔVTRIM RPOT = 10kΩ±3±6%
MAX6177AASA 1.5 3
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT TA = -40°C to +125°C
MAX6177BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ΔVOUT /
ΔVIN 5.3V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10 ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C 50 500
Load Regulation (Note 3) ΔVOUT /
ΔIOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C 90 900
ppm/
mA
OUT shorted to GND 60
Output Short-Circuit Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
ΔVOUT/
cycle 120 ppm
Long-Term Stability ΔVOUT/
time 1000 hours at TA = +25°C 50 ppm
DYNAMIC
f = 0.1Hz to 10Hz 5 μVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 9.3 μVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF 180 μs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 5.3 40.0 V
TA = +25°C 320 500
Quiescent Supply Current IIN No load TA = -40°C to +125°C 650 μA
TEMP OUTPUT
TEMP Output Voltage VTEMP 630 mV
TEMP Temperature
Coefficient TCTEMP 2.1 mV/°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
4Maxim Integrated
ELECTRICAL CHARACTERISTICS—MAX6174 (VOUT = 4.096V)
(VIN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
MAX6174A (0.06%) 4.0935 4.096 4.0985
Output Voltage VOUT No load, TA = +25°CMAX6174B (0.1%) 4.0919 4.096 4.1001 V
Output Adjustment Range ΔVTRIM RPOT = 10kΩ±3±6%
MAX6174AASA 1.5 3
Output-Voltage Temperature
Coefficient (Note 2) TCVOUT TA = -40°C to +125°CMAX6174BASA 3 10 ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ΔVOUT/
ΔVIN 6.1V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10 ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C 50 500
Load Regulation (Note 3) ΔVOUT/
ΔIOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C 90 900
ppm/mA
OUT shorted to GND 60
Output Short-Circuit Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
ΔVOUT/
cycle 120 ppm
Long-Term Stability ΔVOUT/
time 1000 hours at TA = +25°C 50 ppm
DYNAMIC
f = 0.1Hz to 10Hz 7 μVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 11.5 μVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF 200 μs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 6.1 40.0 V
TA = +25°C 320 500
Quiescent Supply Current IIN No load TA = -40°C to +125°C 650 μA
TEMP OUTPUT
TA = +25°C 475 630 785
TEMP Output Voltage VTEMP TA = -40°C to +125°C 300 1130 mV
TEMP Temperature
Coefficient TCTEMP 2.1 mV/°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
5
Maxim Integrated
ELECTRICAL CHARACTERISTICS—MAX6175 (VOUT = 5.0V)
(VIN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
MAX6175A (0.06%) 4.9970 5.0 5.0030
Output Voltage VOUT No load, TA = +25°CMAX6175B (0.1%) 4.9950 5.0 5.0050 V
Output Adjustment Range VTRIM R
POT = 10k ±3±6 %
MAX6175AASA 1.5 3
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT T
A = -40°C to +125°C
MAX6175BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) VOUT /
VIN 7V VIN 40V TA = -40°C to +125°C 0.8 10
ppm/V
TA = +25°C 2 10
Sourcing:
0 IOUT 10mA TA = -40°C to +125°C 2 15
TA = +25°C 50 500
Load Regulation (Note 3) VOUT /
IOUT Sinking:
-0.6mA IOUT 0 TA = -40°C to +125°C 90 900
ppm/mA
OUT shorted to GND 60
Output Short-Circuit Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
VOUT/
cycle 120 ppm
Long-Term Stability VOUT/
time 1000 hours at TA= +25°C 50 ppm
DYNAMIC
f = 0.1Hz to 10Hz 9 μVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 14.5 μVRMS
Turn-On Settling Time tR To VOUT = 0.1% of final value, COUT = 50pF 230 μs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 7.0 40.0 V
TA = +25°C 320 550
Quiescent Supply Current IIN No load TA = -40°C to +125°C 700
μA
TEMP OUTPUT
TA = +25°C 475 630 785
TEMP Output Voltage VTEMP TA = -40°C to +125°C 300 1130
mV
TEMP Temperature
Coefficient TCTEMP 2.1 mV/°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
6Maxim Integrated
ELECTRICAL CHARACTERISTICS—MAX6176 (VOUT = 10V)
(VIN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUTPUT
MAX6176A (0.05%) 9.9950 10.0 10.0050
Output Voltage VOUT No load, TA = +25°CMAX6176B (0.1%) 9.9900 10.0 10.0100 V
Output Adjustment Range ΔVTRIM RPOT = 10kΩ±3±6%
MAX6176AASA 1.5 3Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT TA = -40°C to +125°C
MAX6176BASA 3 10
p p m /° C
TA = +25°C 0.6 5
Line Regulation (Note 3) ΔVOUT/
ΔVIN 12V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10 ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C 50 500
Load Regulation (Note 3) ΔVOUT/
ΔIOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90 900
p p m /m A
OUT shorted to GND 60
Output Short-Circuit
Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
ΔVOUT/
cycle 120 ppm
Long-Term Stability ΔVOUT/
time 1000 hours at TA = +25°C 50 ppm
DYNAMIC
f = 0.1Hz to 10Hz 18 μVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 29 μVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF 400 μs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 12.0 40.0 V
TA = +25°C 340 550
Quiescent Supply Current IIN No load TA = -40°C to +125°C 700 μA
TEMP OUTPUT
TEMP Output Voltage VTEMP 630 mV
TEMP Temperature
Coefficient TCTEMP 2.1 mV/°C
Note 1: All devices are 100% production tested at TA= +25°C and guaranteed by design over TA= TMIN to TMAX, as specified.
Note 2: Temperature coefficient is defined as ΔVOUT divided by the temperature range.
Note 3: Line and load regulation specifications do not include the effects of self-heating.
Note 4: Thermal hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMAX to TMIN.
Typical Operating Characteristics
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
4.094
4.0945
4.095
4.0955
4.096
4.0965
4.097
4.0975
4.098
-50 -25 0 25 50 75 100 125
OUTPUT VOLTAGE (V)
TEMPERATURE (∞C)
OUTPUT VOLTAGE
vs. TEMPERATURE (VOUT = 4.096V)
CLOAD = NO LOAD
toc1b
9.993
9.998
9.995
10.001
9.999
9.996
10.002
9.997
9.994
10.000
10.003
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 10V)
MAX6173 toc02
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
-50 25 50-25 0 75 100 125
THREE TYPICAL PARTS
0.50
0.25
0
-0.25
-0.50
015510 202530
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 2.5V)
MAX6173 toc03
SOURCE CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = -40°C
TA = +125°C
TA = +25°C
0.50
0.25
0
-0.25
-0.50
015510 202530
LOAD REGULATION
vs. SOURCE CURRENT (VOUT = 10V)
MAX6173 toc04
SOURCE CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TA = +125°C
TA = -40°C
1.00
0.75
0.50
0.25
-0.25
0
-0.50
01.00.5 1.5 2.0
LOAD REGULATION
vs. SINK CURRENT (VOUT = 2.5V)
MAX6173 toc05
SINK CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TA = +125°C
TA = -40°C
2.0
1.5
1.0
0.5
-0.5
0
-1.0
01.00.5 1.5 2.0
LOAD REGULATION
vs. SINK CURRENT (VOUT = 10V)
MAX6173 toc06
SINK CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = -40°C
TA = +125°C
TA = +25°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
7
Maxim Integrated
2.498
2.500
2.499
2.501
2.502
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.5V)
MAX6173 toc01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
-50 25 50-25 0 75 100 125
THREE TYPICAL PARTS
-0.5
-0.25
0
0.25
0.5
0 5 10 15 20 25 30
OUTPUT VOLTAGE CHANGE (mV)
SOURCE CURRENT (mA)
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 4.096V)
COUT = 0
TA= +25°C
toc3b
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
00.511.52
OUTPUT VOLTAGE CHANGE (mV)
SINK CURRENT (mA)
LOAD REGULATION
vs. SINK CURRENT (VOUT = 4.096V)
CLOAD = NO LOAD
TA= +25°C
toc5b
0.5
1.5
1.0
2.0
2.5
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 10V)
MAX6173 toc10
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (V)
0121648 20
TA = -40°C
TA = +125°C
TA = +25°C
-140
-100
-120
-60
-80
-20
-40
0
0.001 0.1 10.01 10 100 1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
MAX6173 toc11
FREQUENCY (kHz)
PSRR (dB)
-120
-100
-60
-80
-20
-40
0
0.001 0.1 10.01 10 100 1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 10V)
MAX6173 toc12
FREQUENCY (kHz)
PSRR (dB)
0.5
1.0
1.5
2.0
2.5
0 4 8 12 16 20
DROPOUT VOLTAGE (V)
SOURCE CURRENT (mA)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCING CURRENT (VOUT = 4.096V)
TA= +25ᵒC
TA= +125ᵒC
TA= -40ᵒC
toc9a
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
0.001 0.01 0.1 1 10 100 1000
PSRR (dB)
FREQUENCY (kHz)
PSRR vs. FREQUENCY
VOUT = 4.096V
toc12a
0.5
1.5
1.0
2.0
2.5
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 2.5V)
MAX6173 toc09
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (V)
0121648 20
TA = -40°C
TA = +125°C
TA = +25°C
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
8Maxim Integrated
0
60
20
40
80
100
LINE REGULATION vs. TEMPERATURE
(VOUT = 2.5V)
MAX6173 toc07
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (μV)
020255 1015 303540
TA = -40°C
TA = +125°C
TA = +25°C
0
150
50
100
200
250
300
LINE REGULATION vs. TEMPERATURE
(VOUT = 10V)
MAX6173 toc08
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (μV)
12 28 3216 20 24 36 40
TA = -40°C
TA = +125°C
TA = +25°C
-60
-40
-20
0
20
40
60
80
100
0 10203040
OUTPUT VOLTAGE VARIATION (μV)
INPUT VOLTAGE (V)
LINE REGULATION
vs. TEMPERATURE (VOUT = 4.096V)
TA= -10°C
TA= +25°C
CLOAD = NO LOAD
TA= -40°C
TA= -10°C
TA= +65°C
TA= +100°C
TA= +125°C
toc7b
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
9
Maxim Integrated
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
0.001
0.1
0.01
10
1
100
0.1 10.01 10 100 1000
OUTPUT IMPEDANCE vs. FREQUENCY
(VOUT = 2.5V)
MAX6173 toc13
FREQUENCY (kHz)
OUTPUT IMPEDANCE (Ω)
0
100
50
200
150
250
300
350
400
010155 2025303540
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 2.5V)
MAX6173 toc14
INPUT VOLTAGE (V)
SUPPLY CURRENT (μA)
TA = -40°C
TA = +125°C
TA = +25°C
0
100
50
200
150
250
300
350
400
010155 2025303540
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 10V)
MAX6173 toc15
INPUT VOLTAGE (V)
SUPPLY CURRENT (μA)
TA = -40°C
TA = +125°C
TA = +25°C
250
300
275
325
350
-50 -25 0 25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 2.5V)
MAX6173 toc16
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
250
325
300
275
350
375
-50 -25 0 25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 10V)
MAX6173 toc17
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
0.001
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10 100 1000
OUTPUT IMPEDANCE (Ω)
FREQUENCY (kHz)
OUTPUT IMPEDANCE
vs. FREQUENCY (VOUT = 4.096V)
COUT = 0
toc13b
0.001
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10 100 1000
OUTPUT IMPEDANCE (Ω)
FREQUENCY (kHz)
OUTPUT IMPEDANCE
vs. FREQUENCY (VOUT = 4.096V)
COUT = 1μF
toc13c
0
50
100
150
200
250
300
350
400
0 5 10 15 20 25 30 35 40
SUPPLY CURRENT ( A)
INPUT VOLTAGE (V)
SUPPLY CURRENT
vs. INPUT VOLTAGE (VOUT = 4.096V)
COUT = 0
TA= +25°C
toc14b
250
275
300
325
350
375
-50 -25 0 25 50 75 100 125
SUPPLY CURRENT (μA)
TEMPERATURE (°C)
SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 4.096V)
COUT = 0
toc16b
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
10 Maxim Integrated
10
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
400
600
500
800
700
900
-50 -25 0 25 50 75 100 125
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 10V)
MAX6173 toc19
TEMPERATURE (°C)
TEMP VOLTAGE (mV)
2.35
2.50
2.45
2.40
2.60
2.55
2.65
0 0.5 1.0 1.5 2.0 2.5
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX6173 toc20
TRIM VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.498
2.500
2.499
2.501
2.502
0 200 400 600 800 1000
LONG-TERM STABILITY vs. TIME
(VOUT = 2.500V)
MAX6173 toc21
TIME (hours)
VOUT (V)
TWO TYPICAL PARTS
9.998
10.000
9.999
10.001
10.002
0 200 400 600 800 1000
LONG-TERM STABILITY vs. TIME
(VOUT = 10.0V)
MAX6173 toc22
TIME (hours)
VOUT (V)
TWO TYPICAL PARTS
1000
100
OUTPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY (VOUT = 2.5V)
MAX6173 toc23
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
0.1 100 1000110
400
600
500
700
800
-50 -25 0 25 50 75 100 125
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 2.5V)
MAX6173 toc18
TEMPERATURE (°C)
TEMP VOLTAGE (mV)
400
500
600
700
800
900
-50 -25 0 25 50 75 100 125
TEMP VOLTAGE (mV)
TEMPERATURE (°C)
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 4.096V)
COUT = 0
toc18b
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.4
4.5
01234
OUTPUT VOLTAGE CHANGE (V)
TRIM VOLTAGE (V)
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 4.096V)
toc20b
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
11
Maxim Integrated
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
10,000
1000
100
OUTPUT-VOLTAGE NOISE DENSITY
vs. FREQUENCY (VOUT = 10V)
MAX6173 toc24
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
0.1 100 1000110
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 2.5V)
MAX6173 toc25
1μV/div
1s/div
0.1Hz TO 10Hz OUTPUT NOISE
(VOUT = 10V)
MAX6173 toc26
4μV/div
1s/div
10
100
1000
0.1 1 10 100 1000 10000 100000
INPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (V
OUT
= 4.096V) toc23b
COUT = 0
1
10
100
1000
0.1 1 10 100 1000 10000 100000
INPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (VOUT = 4.096V)
toc23c
COUT = 1μF
-6
-4
-2
0
2
4
6
OUTPUT VOLTAGE NOISE (μVP-P)
4s/div
0.1Hz to 10Hz OUTPUT VOLTAGE NOISE
(VOUT = 4.096V, COUT = 0) toc24b
-6
-4
-2
0
2
4
6
OUTPUT VOLTAGE NOISE (μVP-P)
4s/div
0.1Hz to 10Hz OUTPUT VOLTAGE NOISE
(VOUT = 4.096V, COUT = 1μμF) toc24c
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
12 Maxim Integrated
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO 20mA)
MAX6173 toc29
IOUT
VOUT
AC-COUPLED
1V/div
0
20mA
10µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1μF, 0 TO 20mA)
MAX6173 toc30
IOUT
VOUT
AC-COUPLED
100mV/div
0
20mA
100μs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO 20mA)
MAX6173 toc27
IOUT
VOUT
AC-COUPLED
1V/div
0
20mA
10μs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
MAX6173 toc28
IOUT
VOUT
AC-COUPLED
50mV/div
0
20mA
200µs/div
LOAD TRANSIENT
(VOUT = 4.096V, COUT = 0, 0 TO 20mA)
10mA/div
1V/div
10μs/div
IOUT
VOUT
AC-
COUPLED
0
20mA
toc28b
LOAD TRANSIENT
(VOUT = 4.096V, COUT = 1μF, 0 TO 20mA)
10mA/div
10mV/div
100μs/div
IOUT
VOUT
AC-
COUPLED
0
20mA
toc28c
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
13
Maxim Integrated
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX6173 toc31
IOUT
VOUT
AC-COUPLED
200mV/div
0
-2mA
40μs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO -2mA)
MAX6173 toc32
IOUT
VOUT
AC-COUPLED
20mV/div
0
-2mA
200μs/div
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
LOAD TRANSIENT
(VOUT = 4.096V, COUT = 0, ISINK = 0 TO -2mA)
200mV/div
100μs/div
ISINK
VOUT AC-
COUPLED
0
-2mA
toc31b
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1μF, 0 TO -2mA)
MAX6173 toc33
IOUT
VOUT
AC-COUPLED
20mV/div
0
-2mA
400μs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1μF, 0 TO -2mA)
MAX6173 toc34
IOUT
VOUT
AC-COUPLED
5mV/div
0
-2mA
400μs/div
LOAD TRANSIENT
(VOUT = 4.096V, COUT = 1μF, ISINK = 0 TO -2mA)
50mV/div
100μs/div
ISINK
VOUT AC-
COUPLED
0
-2mA
toc33b
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
Maxim Integrated
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
LINE TRANSIENT
(VOUT = 2.5V)
MAX6173 toc35
VIN
VOUT
AC-COUPLED
200mV/div
5.5V
4.5V
10μs/div
COUT = 0
LINE TRANSIENT
(VOUT = 10V)
MAX6173 toc36
VIN
1V/div
VOUT
AC-COUPLED
200mV/div
15.5V
14.5V
2μs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 0)
MAX6173 toc37
VIN
2V/div
VOUT
1V/div
GND
GND
10μs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 1μF)
MAX6173 toc38
VIN
2V/div
VOUT
1V/div
GND
GND
40μs/div
LINE TRANSIENT
(VOUT = 4.096V, COUT = 0)
0.5V/div
50mV/div
100μs/div
VIN
VOUT
AC-
COUPLED
AC-
COUPLED
(14.5V TO
15.5V)
toc34b
LINE TRANSIENT
(VOUT = 4.096V, COUT = 1μ
μ
F)
0.5V/div
20mV/div
200μs/div
VIN
VOUT AC-
COUPLED
AC-
COUPLED
(14.5V TO
15.5V)
toc34c
14
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
15
Maxim Integrated
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = 4.096V and VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)--
TURN-ON TRANSIENT
(VOUT = 4.096V, COUT = 0)
10V/div
2V/div
200μs/div
VIN
VOUT
toc38b
TURN-ON TRANSIENT
(VOUT = 4.096V, COUT = 1µF)
10V/div
2V/div
100μs/div
VIN
VOUTP
toc38c
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 0)
MAX6173 toc39
VIN
5V/div
VOUT
5V/div
GND
GND
100μs/div
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 1μF)
MAX6173 toc40
VIN
5V/div
VOUT
5V/div
GND
GND
200μs/div
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
16 Maxim Integrated
Detailed Description
The MAX6173–MAX6177 precision voltage references
provide accurate preset +2.5V, +3.3V, +4.096V, +5.0V,
and +10V reference voltages from up to +40V input volt-
ages. These devices feature a proprietary temperature-
coefficient curvature-correction circuit and laser-trimmed
thin-film resistors that result in a very low 3ppm/°C tem-
perature coefficient and excellent 0.05% initial accuracy.
The MAX6173–MAX6177 draw 340μA of supply current
and source 30mA or sink 2mA of load current.
Trimming the Output Voltage
Trim the factory-preset output voltage on the
MAX6173–MAX6177 by placing a resistive divider net-
work between OUT, TRIM, and GND.
Use the following formula to calculate the change in
output voltage from its preset value:
ΔVOUT = 2 x (VTRIM - VTRIM (open)) x k
where:
VTRIM = 0V to VOUT
VTRIM (open) = VOUT (nominal)/2 (typ)
k = ±6% (typ)
For example, use a 50kΩpotentiometer (such as the
MAX5436) between OUT, TRIM, and GND with the
potentiometer wiper connected to TRIM (see Figure 2).
As the TRIM voltage changes from VOUT to GND, the
output voltage changes accordingly. Set R2 to 1MΩor
less. Currents through resistors R1 and R2 add to the
quiescent supply current.
Temp Output
The MAX6173–MAX6177 provide a temperature output
proportional to die temperature. TEMP can be calculated
from the following formula:
TEMP (V) = TJ(°K) x n
where TJ= the die temperature,
n = the temperature multiplier,
TA= the ambient temperature.
Self-heating affects the die temperature and conversely,
the TEMP output. The TEMP equation assumes the output
is not loaded. If device power dissipation is negligible,
then TJ≈TA.
nVatTT
TmV K
TEMP J
()
.==≅°
0
0
19
PIN NAME FUNCTION
1, 8 I.C. Internally Connected. Do not connect externally.
2 IN Positive Power-Supply Input
3 TEMP Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die
temperature.
4 GND Ground
5 TRIM Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for
trimming. Leave unconnected to use the preset output voltage.
6 OUT Output Voltage
7 N.C. No Connection. Not internally connected.
Pin Description
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
17
Maxim Integrated
Applications Information
Bypassing/Output Capacitance
For the best line-transient performance, decouple the
input with a 0.1μF ceramic capacitor as shown in the
Typical Operating Circuit
. Place the capacitor as close
to IN as possible. When transient performance is less
important, no capacitor is necessary.
The MAX6173–MAX6177 do not require an output
capacitor for stability and are stable with capacitive
loads up to 100μF. In applications where the load or the
supply can experience step changes, a larger output
capacitor reduces the amount of overshoot (under-
shoot) and improves the circuit’s transient response.
Place output capacitors as close to the devices as pos-
sible for best performance.
Supply Current
The MAX6173–MAX6177 consume 320μA (typ) of qui-
escent supply current. This improved efficiency
reduces power dissipation and extends battery life.
Thermal Hysteresis
Thermal hysteresis is the change in the output voltage
at TA= +25°C before and after the device is cycled
over its entire operating temperature range. Hysteresis
is caused by differential package stress appearing
across the bandgap core transistors. The typical ther-
mal hysteresis value is 120ppm.
Turn-On Time
The MAX6173–MAX6177 typically turn on and settle to
within 0.1% of the preset output voltage in 150μs (2.5V
output). The turn-on time can increase up to 150μs with
the device operating with a 1μF load.
Short-Circuited Outputs
The MAX6173–MAX6177 feature a short-circuit-protected
output. Internal circuitry limits the output current to
60mA when short circuiting the output to ground. The
output current is limited to 3mA when short circuiting
the output to the input.
Temperature Coefficient vs. Operating
Temperature Range for a
1 LSB Maximum Error
In a data converter application, the reference voltage of
the converter must stay within a certain limit to keep the
error in the data converter smaller than the resolution
limit through the operating temperature range. Figure 1
shows the maximum allowable reference-voltage tem-
perature coefficient to keep the conversion error to less
than 1 LSB, as a function of the operating temperature
range (TMAX - TMIN) with the converter resolution as a
parameter. The graph assumes the reference-voltage
temperature coefficient as the only parameter affecting
accuracy.
In reality, the absolute static accuracy of a data con-
verter is dependent on the combination of many para-
meters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage-
reference changes.
TEMPERATURE
COEFFICIENT
(ppm/°C)
110 100
16-BIT
14-BIT
12-BIT
10-BIT
8-BIT
0.01
0.1
10
100
1000
1
10,000
18-BIT
20-BIT
OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
18 Maxim Integrated
IN
OUT
GND
*OPTIONAL.
*
( VOUT + 2V) TO 40V INPUT
REFERENCE
OUTPUT
MAX5436
50kΩ
POTENTIOMETER
TRIM
TEMP
MAX6173–MAX6177
Figure 2. Applications Circuit Using the MAX5436 Potentiometer
Chip Information
PROCESS: BiCMOS
OUT
TRIMGND
*INTERNALLY CONNECTED. DO NOT CONNECT.
1
+
2
8
7
I.C.*
N.C.IN
TEMP
I.C.*
SO
TOP VIEW
3
4
6
5
MAX6173–
MAX6177
Pin Configuration
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE OUTLINE NO. LAND
PATTERN NO.
8 SO S8+4 21-0041 90-0096
MAX6173–MAX6177
High-Precision Voltage References with
Temperature Sensor
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 ________________________________
19
© 2014 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 ________________________________
19
© 2014 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 6/04 Initial release —
1 2/11 Added automotive grade part, lead-free information, and soldering
temperature 1, 2
2 3/14 Updated package code in Package Information 14
3 6/14 Updated Ordering Information, Electrical Characteristics, and Typical
Operating Characteristics 1, 4, 5, 8
4 9/14 Updated Typical Operating Characteristics 7–14
5 9/14 Updated Typical Operating Characteristics 7–15
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