DEVICE DESCRIPTION
The ZRC400 uses a bandgap circuit design to
achieve a precision micropower voltage
reference of 4.096 volts. The device is
available in small outline surface mount
packages, ideal for applications where space
saving is important, as well as packages for
through hole requirements.
The ZRC400 design provides a stable voltage
without an external capacitor and is stable
with capacitive loads. The ZRC400 is
recommended for operation between 23µA
and 5mA and so is ideally suited to low
power and battery powered applications.
Excellent performance is maintained to an
absolute maximum of 25mA, however the
rugged design and 20 volt processing allows
the reference to withstand transient effects
and currents up to 200mA. Superior
switching capability allows the device to
reach stable operating conditions in only a
few microseconds.
FEATURES
•Small outline SOT23 , SO8 and TO92
style packages
•No stabilising capacitor required
•Low knee current, 18µA typical
•Typical TC 30ppm/°C
•Typical slope resistance 0.4Ω
•± 3%, 2% and 1% tolerance
•Industrial temperature range
•Operating current 23µA to 5mA
•Transient response, stable in less than
10µs
•Optional extended current range
APPLICATIONS
•Battery powered and portable
equipment.
•Instrumentation.
•Test equipment.
•Metering and measurement systems.
V R
G nd
PRECISION 4.096 VOLT LOW KNEE CURRENT
VOLTAGE REFERENCE
ISSUE 3 - MARCH 1998
ZRC400
SCHEMATIC DIAGRAM
4-257
ABSOLUTE MAXIMUM RATING
Reverse Current 25mA
Forward Current 25mA
Operating Temperature -40 to 85°C
Storage Temperature -55 to 125°C
Power Dissipation (Tamb=25°C)
SOT23 330mW
E-Line, 3 pin (TO92) 500mW
E-Line, 2 pin (TO92) 500mW
SO8 625mW
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
SYMBOL PARAMETER CONDITIONS LIMITS TOL.
%UNITS
MIN TYP MAX
VRReverse Breakdown Voltage IR=150µA4.055
4.014
3.973
4.096
4.096
4.096
4.137
4.178
4.219
1
2
3
V
IMIN Minimum Operating Current 18 23 µA
IRRecommended Operating
Current
0.023 5 mA
TC † Average Reverse Breakdown
Voltage Temp. Co. IR(min) to
IR(max)
30 90 ppm/°C
RS § Slope Resistance 0.4 2 Ω
ZRReverse Dynamic Impedance IR =1mA
f = 100Hz
IAC=0.1 IR
0.3 0.8 Ω
ENWideband Noise Voltage IR=150µA
f=10Hz to
10kHz
90 µV(rms)
ZRC400
Reverse Characteristics
Reverse Current (uA)
Reverse Voltage (V)
0
10
20
30
40
501234
85 °C
25 °C
-40 °C
†
T
C
= (
V
R
(
max
)−
V
R
(
min
))
x
1000000
V
R
x
(
T
(
max
)−
T
(
min
))
Note: VR(max) - VR(min) is the maximum
deviation in reference voltage measured
over the full operating temperature
range.
§
R
S
=
V
R
Change
(
I
R
(
min
)
to
I
R
(
max
))
I
R
(
max
) −
I
R
(
min
)
4-258
Forward Characteristics
Forward Voltage (V)
Forward Current (mA)
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0.1 1 10 100 1000
Slope Resistance (Ohms)
1
0
0.5
1.5
2
0.1
Reference Current (mA)
Slope Resistance vs. Current
110
Vin (V)
0
0
10
2
4
0
Time (µs)
Transient Response (Single Pulse)
200 400 600
Vout (V)
Ta=-40°C
Ta=25°C
Ta=85°C
5mA
150µA
Reference Voltage (V)
4.10
4.08
4.09
60 80 100-40
Temperature (°C)
Temperature Drift
-20 0 20 40
Slope Resistance (Ohms)
10
0.1
1
100
1000
10
Frequency (Hz)
Slope Resistance vs. Frequency
100 1K 10K 100K
Vin (V)
0
10
Vout (V)
0
2
4
Transient Response (Repetitive Pulse)
4
Time (µs)
206
Iref=100µA
Iref=150µA
Iref=5mA
5mA
150µA
Iref=1mA
39K
150µA
1K2
5mA
VIN
39K
150µA
1K2
5mA
VIN
ZRC400
TYPICAL CHARACTERISTICS
4-259
SO8 Package Suffix – N8
Top View
E-Line, 3 pin,Rev Package Suffix – R
Bottom View –
Pin 3 floating or connected to pin 1
E-Line, 2 pin Package Suffix – Y
Bottom View
CONNECTION DIAGRAMS
E-Line, 3 pin Package Suffix – A
Bottom View –
Pin 1 floating or connected to pin 3
SOT23 Package Suffix – F
Top View –
Pin 1 floating or connected to pin 2
ZRC400
4-260
Part No Tol% Package Partmark
ZRC400A03 3 E-Line •ZRC40003
ZRC400A02 2 E-Line •ZRC40002
ZRC400A01 1 E-Line •ZRC40001
ZRC400F03 3 SOT23 40D
ZRC400F02 2 SOT23 40G
ZRC400F01 1 SOT23 40H
ZRC400N803 3 SO8 ZRC40003
ZRC400N802 2 SO8 ZRC40002
ZRC400N801 1 SO8 ZRC40001
Part No Tol% Package Partmark
ZRC400R03 3 E-Line * ZRC400R3
ZRC400R02 2 E-Line * ZRC400R2
ZRC400R01 1 E-Line * ZRC400R1
ZRC400Y03 3 E-Line † ZRC40003
ZRC400Y02 2 E-Line † ZRC40002
ZRC400Y01 1 E-Line † ZRC40001
* E-Line 3 pin Reversed
† E-Line 2 pin
• E-Line 3 pin
ORDERING INFORMATION
ZRC400
4-261
