General Description
The MAX6161–MAX6168 are precision, low-dropout,
micropower voltage references. These three-terminal
devices operate with an input voltage range from (VOUT
+ 200mV) to 12.6V and are available with output voltage
options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V, 4.5V,
and 5V. They feature a proprietary curvature-correction
circuit and laser-trimmed thin-film resistors that result in a
very low temperature coefficient of 5ppm/°C (max) and an
initial accuracy of ±2mV (max). Specifications apply to the
extended temperature range (-40°C to +85°C).
The MAX6161–MAX6168 typically draw only 100μA of
supply current and can source 5mA (4mA for MAX6161)
or sink 2mA of load current. Unlike conventional shunt-
mode (two-terminal) references that waste supply
current and require an external resistor, these devices
offer a supply current that is virtually independent
of the supply voltage (8μA/V variation) and do not
require an external resistor. Additionally, the internally
compensated devices do not require an external compensation
capacitor. Eliminating the external compensation capacitor
saves valuable board area in space-critical applications.
A low-dropout voltage and a supply-independent, ultra-low
supply current make these devices ideal for battery-
operated, high-performance, low-voltage systems.
The MAX6161–MAX6168 are available in 8-pin SO
packages.
Benets and Features
●±2mV (max) Initial Accuracy
●5ppm/°C (max) Temperature Coefficient
●5mA Source Current at 0.9mV/mA
●2mA Sink Current at 2.5mV/mA
● Stable with 1μF Capacitive Loads
●No External Capacitor Required
● 100μA (typ) Quiescent Supply Current
● 200mV (max) Dropout at 1mA Load Current
●Output Voltage Options: 1.25V, 1.8V, 2.048V, 2.5V,
3V, 4.096V, 4.5V, 5V
Applications
●Analog-to-Digital Converters (ADCs)
●Portable Battery-Powered Systems
●Notebook Computers
●PDAs, GPS, DMMs
●Cellular Phones
●Precision +3V/+5V Systems
Ordering Information, Typical Operating Circuit, and
Selector Guide appear at end of data sheet.
19-1650; Rev 4; 12/08
Pin Conguration
OUT
N.C.GND
1
2
8
7
N.C.
N.C.IN
N.C.
N.C.
SO
+
TOP VIEW
3
4
6
5
MAX6161–
MAX6168
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
Voltages Referenced to GND
IN .......................................................................... -0.3 to +13.5V
OUT ............................................................-0.3V to (VIN + 0.3V)
Output Short-Circuit Duration to GND or IN (VIN ≤ 6V) .... Continuous
Output Short-Circuit Duration to GND or IN (VIN > 6V) ........ 60s
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range………….…………-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6161A 1.248 1.250 1.252 V
MAX6161B 1.246 1.250 1.254
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6161A 4 10
ppm/°C
MAX6161B 6 15
Line Regulation ΔVOUT/
ΔVIN 2.5V ≤ VIN ≤ 12.6V 12 150 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 4mA 0.5 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 1.3 2.5
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 115 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 20 µVp-p
f = 10Hz to 10kHz 15 µVRMS
Ripple Rejection VOUT/VIN VIN = +5V ±100mV, f = 120Hz 80 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 50 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V
Quiescent Supply Current IIN 125 150 µA
Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V
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.
Electrical Characteristics—MAX6161 (VOUT = 1.25V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6168A 1.798 1.800 1.802 V
MAX6168B 1.795 1.800 1.805
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6168A 2 5
ppm/°C
MAX6168B 4 10
Line Regulation ΔVOUT/
ΔVIN 2.5V ≤ VIN ≥ 12.6V 42 200 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 1.5 4
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 22 µVp-p
f = 10Hz to 10kHz 25 µVRMS
Ripple Rejection ΔVOUT/ΔVIN VIN = +5V ±100mV, f = 120Hz 78 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 100 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.4 8.0 µA/V
Electrical Characteristics—MAX6168 (VOUT = 1.800V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6162A 2.046 2.048 2.050 V
MAX6162B 2.043 2.048 2.053
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6162A 2 5
ppm/°C
MAX6162B 4 10
Line Regulation ΔVOUT/
ΔVIN 2.5V ≤ VIN ≤ 12.6V 42 250 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 1.5 4
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 22 µVp-p
f = 10Hz to 10kHz 25 µVRMS
Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 78 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 100 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.4 8.0 µA/V
Electrical Characteristics—MAX6162 (VOUT = 2.048V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6166A 2.498 2.500 2.502 V
MAX6166B 2.495 2.500 2.505
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6166A 2 5
ppm/°C
MAX6166B 4 10
Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV
Line Regulation ΔVOUT/
ΔVIN
VOUT + 0.2V ≤ VIN ≤ 12.6V 60 250 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 1.6 5
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 27 µVp-p
f = 10Hz to 10kHz 30 µVRMS
Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 76 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 115 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V
Electrical Characteristics—MAX6166 (VOUT = 2.500V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6163A 2.998 3.000 3.002 V
MAX6163B 2.995 3.000 3.005
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6163A 2 5
ppm/°C
MAX6163B 4 10
Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV
Line Regulation ΔVOUT/
ΔVIN
VOUT + 0.2V ≤ VIN ≤ 12.6V 83 300 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 1.8 5
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 35 µVp-p
f = 10Hz to 10kHz 40 µVRMS
Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 76 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 115 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V
Electrical Characteristics—MAX6163 (VOUT = 3.000V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6164A 4.094 4.096 4.098 V
MAX6164B 4.091 4.096 4.101
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6164A 2 5
ppm/°C
MAX6164B 4 10
Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV
Line Regulation ΔVOUT/
ΔVIN
VOUT + 0.2V ≤ VIN ≤ 12.6V 140 300 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9 mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 2.0 7.0
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 50 µVp-p
f = 10Hz to 10kHz 50 µVRMS
Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 72 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 190 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V
Electrical Characteristics—MAX6164 (VOUT = 4.096V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6167A 4.498 4.500 4.502 V
MAX6167B 4.495 4.500 4.505
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6167A 2 5
ppm/°C
MAX6167B 4 10
Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV
Line Regulation ΔVOUT/
ΔVIN
VOUT + 0.2V ≤ VIN ≤ 12.6V 160 450 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 2.3 8.0
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 55 µVp-p
f = 10Hz to 10kHz 55 µVRMS
Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 70 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 230 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.1 8.0 µA/V
Electrical Characteristics—MAX6167 (VOUT = 4.500V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
Note 1: 100% production tested at TA = +25°C. Guaranteed by design for TA = -40°C to +85°C.
Note 2: Temperature Coefficient is specified by the “box” method; i.e., the maximum ΔVOUT is divided by the maximum ΔT.
Note 3: Thermal Hysteresis is defined as the change in TA = +25°C output voltage before and after temperature cycling of the
device (from TA = TMIN to TMAX). Initial measurement at TA = +25°C is followed by temperature cycling the device to
TA = +85°C then to TA = -40°C, and another measurement at TA = +25°C is compared to the original measurement at
TA = +25°C.
Note 4: Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V
(VIN = 5.5V for MAX6165).
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage VOUT TA = +25°C MAX6165A 4.998 5.000 5.002 V
MAX6165B 4.995 5.000 5.005
Output Voltage Temperature
Coefcient (Note 2) TCVOUT
MAX6165A 2 5
ppm/°C
MAX6165B 4 10
Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV
Line Regulation ΔVOUT/
ΔVIN
VOUT + 0.2V ≤ VIN ≤ 12.6V 180 400 µV/V
Load Regulation ΔVOUT/
ΔIOUT
Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9
mV/mA
Sinking: -2mA ≤ IOUT ≤ 0 2.4 8.0
OUT Short-Circuit Current ISC
Short to GND 110 mA
Short to IN 25
Long-Term Stability ΔVOUT/
time 1000hr at +25°C 80 ppm/
1000hr
Output Voltage Hysteresis
(Note 3)
ΔVOUT/
cycle 125 ppm
DYNAMIC CHARACTERISTICS
Noise Voltage eOUT
f = 0.1Hz to 10Hz 60 µVp-p
f = 10Hz to 10kHz 60 µVRMS
Ripple Rejection VOUT/VIN VIN = 5.5V ±100mV, f = 120Hz 65 dB
Turn-On Settling Time tRVOUT to 0.1% of nal value, COUT = 50pF 300 µs
INPUT CHARACTERISTICS
Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V
Quiescent Supply Current IIN 100 120 µA
Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.1 8.0 µA/V
Electrical Characteristics—MAX6165 (VOUT = 5.000V)
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5)
Typical Operating Characteristics
MAX6161
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6161/68 toc01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
705525 40-10 0 10-25
1.2496
1.2497
1.2498
1.2499
1.2500
1.2501
1.2502
1.2503
1.2504
1.2505
1.2495
-40 85
3 TYPICAL PARTS
MAX6165
LONG-TERM DRIFT
MAX6161/68 toc04
TIME (hrs)
DRIFT (ppm)
768
192 384 576
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0 960
-3
1
0
-1
-2
2
3
4
5
-4 -2 0 2 4
MAX6161/68 toc07
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TA = -40°C
MAX6161
LOAD REGULATION
TA = +85°C
MAX6165
OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6161/68 toc02
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
7055-25 -10 0 2510 40
4.9985
4.9990
4.9995
5.0000
5.0005
5.0010
5.0015
5.0020
4.9980
-40 85
3 TYPICAL PARTS
-300
-200
-100
0
100
200
300
2 4 6 8 10 12
MAX6161
LINE REGULATION
MAX6161/68 toc05
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = +25°C
TA = -40°C
-6
2
0
-2
-4
4
8
6
10
12
-6 -2-4 0 2 4 6
MAX6161/68 toc08
LOAD CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
MAX6165
LOAD REGULATION
TA = +25°C
TA = +85°C
TA = -40°C
MAX6161
LONG-TERM DRIFT
MAX6161/68 toc03
TIME (hrs)
DRIFT (ppm)
768
192 384 576
-30
-20
-10
0
10
20
30
40
50
60
-40
0 960
-1200
-600
-800
-1000
-400
-200
0
200
5 97 11 13
MAX6165
LINE REGULATION
MAX6161/68 toc06
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
TA = +85°C
TA = +25°C
TA = -40°C
0
0.10
0.05
0.20
0.15
0.25
0.30
0 21 3 4 5
MAX6166
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX6161/68 toc09
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
Maxim Integrated
│
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(VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5)
Typical Operating Characteristics (continued)
0
0.05
0.15
0.10
0.20
0.25
0 21 3 4 5
TA = +85°C
TA = +25°C
TA = -40°C
MAX6161/68 toc10
LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
MAX6165
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX6161
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6161/68 toc13
SUPPLY VOLTAGE (V)
12
10864
108
116
124
132
140
148
156
164
172
180
100
412
SUPPLY CURRENT (µA)
TA = +85°C
TA = +25°C
TA = -40°C
MAX6165
SUPPLY CURRENT vs. TEMPERATURE
MAX6161/68 toc16
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
96
102
108
114
120
126
132
138
144
150
90
-40 85
VCC = +12.6V
VCC = +5.2V
MAX6161/68 toc11
FREQUENCY (kHz)
PSRR (dB)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.001 1 10 1000.01 0.1 1000
MAX6161
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX6165
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6161/68 toc14
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
131210 117 8 96
96
102
108
114
120
126
132
138
144
150
90
5 14
TA = +85°C
TA = +25°C
TA = -40°C
0
0.001 10 1000
40
20
60
80
100
140
120
160
180
200
220
MAX6161/68 toc17
FREQUENCY (kHz)
OUTPUT IMPEDANCE (
Ω)
0.1
MAX6161
OUTPUT IMPEDANCE
vs. FREQUENCY
-70
-80
0.001 10 1000
-60
-50
-40
-30
-20
-10
0
FREQUENCY (kHz)
PSRR (dB)
0.1
MAX6165
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX6161/68 toc12
MAX6161
SUPPLY CURRENT vs. TEMPERATURE
MAX6161/68 toc15
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
108
116
124
132
140
148
156
164
172
180
100
-40 85
VCC = +12.6V
VCC = +5V
VCC = +2.5V
180
0
0.001 10 1000
40
20
60
100
80
120
140
160
MAX6161/68 toc18
FREQUENCY (kHz)
OUTPUT IMPEDANCE (Ω)
0.1
MAX6165
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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(VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5)
Typical Operating Characteristics (continued)
VOUT
10µV/div
1s/div
MAX6161
0.1Hz TO 10Hz OUTPUT NOISE
MAX6161/68 toc19
VOUT
500mV/div
VIN
5V/div
10µs/div
MAX6161
TURN-ON TRANSIENT
(CL = 50pF)
MAX6161/68 toc21
IOUT
500µA/div
VOUT
AC-COUPLED
100mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(IOUT = ±250µA, VIN = 5.0, CL = 0)
+250µA
-250µA
MAX6161/68 toc23
VOUT
10µV/div
1s/div
MAX6165
NOISE
MAX6161/68 toc20
VOUT
2V/div
VIN
5V/div
40µs/div
MAX6165
TURN-ON TRANSIENT
(CL = 50pF)
MAX6161/67 toc22
IOUT
500µA/div
VOUT
AC-COUPLED
50mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(IOUT = ±250µA, CL = 0, VIN = 5.5V)
+250µA
-250µA
MAX6161/68 toc24
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
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(VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5)
Typical Operating Characteristics (continued)
IOUT
500µA/div
VOUT
AC-COUPLED
10mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(IOUT = ±250µA, VIN = 5.0V, CL = 1µF)
+250µA
-250µA
MAX6161/68 toc25
IOUT
5mA/div
VOUT
AC-COUPLED
100mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(VIN = 5.0V, CL = 0, IOUT = ±2mA)
+2mA
-2mA
MAX6161/68 toc27
IOUT
5mA/div
VOUT
AC-COUPLED
50mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(VIN = 5.0V, CL = 1µF, IOUT = ±2mA)
+2mA
-2mA
MAX6161/68 toc29
IOUT
500µA/div
VOUT
AC-COUPLED
20mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(IOUT = ±250µA, CL = 1µF, VIN = 5.5V)
+250µA
-250µA
MAX6161/68 toc26
IOUT
5mA/div
VOUT
AC-COUPLED
50mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(CL = 0, IOUT = ±2mA, VIN = 5.5V)
+2mA
-2mA
MAX6161/68 toc28
IOUT
5mA/div
VOUT
AC-COUPLED
20mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(CL = 1µF, IOUT = ±2mA, VIN = 5.5V)
+2mA
-2mA
MAX6161/68 toc30
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
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(VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5)
Note 5:
Many of the Typical Operating Characteristics of the MAX6161 family are extremely similar. The extremes of these characteristics
are found in the MAX6161 (1.25V output) and the MAX6165 (5.0V output). The Typical Operating Characteristics of the remainder
of the MAX6161 family typically lie between these two extremes and can be estimated based on their output voltages.
Typical Operating Characteristics (continued)
IOUT
5mA/div
VOUT
AC-COUPLED
200mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(VIN = 5.0V, CL = 0, IOUT = ±4mA)
+4mA
-4mA
MAX6161/68 toc31
IOUT
5mA/div
VOUT
AC-COUPLED
50mV/div
400µs/div
MAX6161
LOAD TRANSIENT
(VIN = 5.0V, CL = 1µF, IOUT = ±4mA)
+4mA
-4mA
MAX6161/68 toc33
VIN
500mV/div
VOUT
AC-COUPLED
20mV/div
40µs/div
MAX6161
LINE TRANSIENT
(CL = 0)
+0.25V
-0.25V
MAX6161/68 toc35
IOUT
5mA/div
VOUT
AC-COUPLED
100mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(IOUT = ±5mA, CL = 0, VIN = 5.5V)
+5mA
-5mA
MAX6161/68 toc32
IOUT
5mA/div
VOUT
AC-COUPLED
50mV/div
400µs/div
MAX6165
LOAD TRANSIENT
(IOUT = ±5mA, CL = 1µF, VIN = 5.5V)
+5mA
-5mA
MAX6161/68 toc34
VIN
500mV/div
VOUT
AC-COUPLED
20mV/div
40µs/div
MAX6165
LINE TRANSIENT
(CL = 0)
+0.25V
-0.25V
MAX6161/68 toc36
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
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Applications Information
Input Bypassing
For the best line-transient performance, decouple the
input with a 0.1μF ceramic capacitor as shown in the
Typical Operating Circuit. Locate the capacitor as close
to IN as possible. When transient performance is less
important, no capacitor is necessary.
Output/Load Capacitance
Devices in the MAX6161 family do not require an output
capacitor for frequency stability. In applications where the
load or the supply can experience step changes, an out-
put capacitor of at least 0.1μF will reduce the amount of
overshoot (undershoot) and improve the circuit’s transient
response. Many applications do not require an external
capacitor, and the MAX6161 family can offer a significant
advantage in applications when board space is critical.
Supply Current
The quiescent supply current of the series-mode MAX6161
family is typically 100μA and is virtually independent of the
supply voltage, with only an 8μA/V (max) variation with
supply voltage. Unlike series references, shunt-mode
references operate with a series resistor connected to
the power supply. The quiescent current of a shunt-
mode reference is thus a function of the input voltage.
Additionally, shunt-mode references have to be biased
at the maximum expected load current, even if the load
current is not present at the time. In the MAX6161 family,
the load current is drawn from the input voltage only when
required, so supply current is not wasted and efficiency is
maximized at all input voltages. This improved efficiency
reduces power dissipation and extends battery life.
When the supply voltage is below the minimum specified
input voltage (as during turn-on), the devices can draw up
to 400μA beyond the nominal supply current. The input
voltage source must be capable of providing this current
to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the input
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 temperature
hysteresis value is 125ppm.
Turn-On Time
These devices typically turn on and settle to within 0.1%
of their final value in 50μs to 300μs, depending on the
output voltage (see electrical table of part used).
The turn-on time can increase up to 1.5ms with the
device operating at the minimum dropout voltage and the
maximum load.
PIN NAME FUNCTION
1, 3, 5, 7, 8 N.C. No Connection. Not internally connected.
2 IN Input Voltage
4 GND Ground
6 OUT Reference Output
Pin Description
Chip Information
TRANSISTOR COUNT: 117
PROCESS: BiCMOS
Typical Operating Circuit
IN
+SUPPLY INPUT (SEE SELECTOR GUIDE)
OUT REFERENCE
OUT
1µF*
*CAPACITORS ARE OPTIONAL.
GND
MAX6161–
MAX6168
0.1µF*
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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PART OUTPUT VOLTAGE
(V)
INITIAL ACCURACY
(mV)
TEMPERATURE
COEFFICIENT
(ppm/°C)
MAX6161A 1.250 ±2 10
MAX6161B 1.250 ±4 15
MAX6168A 1.800 ±2 5
MAX6168B 1.800 ±5 10
MAX6162A 2.048 ±2 5
MAX6162B 2.048 ±5 10
MAX6166A 2.500 ±2 5
MAX6166B 2.500 ±5 10
MAX6163A 3.000 ±2 5
MAX6163B 3.000 ±5 10
MAX6164A 4.096 ±2 5
MAX6164B 4.096 ±5 10
MAX6167A 4.500 ±2 5
MAX6167B 4.500 ±5 10
MAX6165A 5.000 ±2 5
MAX6165B 5.000 ±5 10
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
8 SO S8+2 21-0041 90-0096
+Denotes a lead(Pb)-free package/RoHS-compliant package.
*Insert the code for the desired initial accuracy and temperature
coefficient (from the Selector Guide) in the blank to complete
the part number.
Note: For leaded version, contact factory.
PART* TEMP RANGE PIN-
PACKAGE
OUTPUT
VOLTAGE (V)
MAX6161_ESA+ -40°C to +85°C 8 SO 1.250
MAX6162_ESA+ -40°C to +85°C 8 SO 2.048
MAX6163_ESA+ -40°C to +85°C 8 SO 3.000
MAX6164_ESA+ -40°C to +85°C 8 SO 4.096
MAX6165_ESA+ -40°C to +85°C 8 SO 5.000
MAX6166_ESA+ -40°C to +85°C 8 SO 2.500
MAX6167_ESA+ -40°C to +85°C 8 SO 4.500
MAX6168_ESA+ -40°C to +85°C 8 SO 1.800
Ordering Information
Selector Guide
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.
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
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REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
4
12/08
Updated part numbers in Ordering Information table
1
Revision History
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 specications 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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX6161–MAX6168 Precision, Micropower, Low-Dropout,
High-Output-Current, SO-8 Voltage References
© 2008 Maxim Integrated Products, Inc.
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MAX6162AESA+ MAX6162BESA+ MAX6161AESA+T MAX6161BESA+ MAX6161BESA+T MAX6162AESA+T
MAX6162BESA+T MAX6163AESA+T MAX6163BESA+T MAX6164AESA+T MAX6164BESA+T MAX6165AESA+
MAX6165AESA+T MAX6165BESA+ MAX6165BESA+T MAX6166AESA+T MAX6166BESA+T MAX6167AESA+T
MAX6167BESA+T MAX6168AESA+ MAX6168AESA+T MAX6168BESA+ MAX6168BESA+T MAX6161AESA+
MAX6163AESA+ MAX6163BESA+ MAX6164AESA+ MAX6164BESA+ MAX6166AESA+ MAX6166BESA+
MAX6167AESA+ MAX6167BESA+ MAX6161AESA/GG8 MAX6161AESA/GG8-T
