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PRECISION 4.096 VOLT LOW KNEE CURRENT VOLTAGE REFERENCE
ISSUE 4 - JANUARY 2003 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 a small outline surface mount package, 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 23A 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 an d cu rrents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.
ZRC400
FEATURES
* * * * * * * * * * * * * *
Small outline SOT23 and TO92 style packages No stabilising capacitor required Low knee current, 18A typical Typical TC 30ppm/C Typical slope resistance 0.4 3%, 2% and 1% tolerance Industrial temperature range Operating current 23A to 5mA Transient response, stable in less than 10s Optional extended current range
APPLICATIONS
Battery powered and portable equipment. Instrumentation. Test equipment. Metering and measurement systems.
SCHEMATIC DIAGRAM
V
R
G nd
4-257
ZRC400
ABSOLUTE MAXIMUM RATING
Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85C -55 to 125C Power Dissipation (Tamb=25C) SOT23 330mW E-Line, 3 pin (TO92) 500mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C
SYMBOL PARAMETER CONDITIONS MIN VR Reverse Breakdown Voltage IR=150A 4.055 4.014 3.973 LIMITS TYP 4.096 4.096 4.096 18 0.023 30 IR(min) to IR(max) 0.4 0.3 MAX 4.137 4.178 4.219 23 5 90 2 0.8 TOL. % 1 2 3 UNITS
V
IMIN IR TC RS ZR
Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. Slope Resistance Reverse Dynamic Impedance
A mA ppm/C
IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150A f = 10Hz to 10kHz
40
EN
Wideband Noise Voltage
90 V(rms)
Reverse Current (uA)
TC =
(VR(max)-VR(min)) x 1000000 VR x (T(max)-T(min))
30
Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range. RS = VR Change (IR (min) to IR (max)) IR (max) - IR (min)
20
25 C
10
85 C
-40 C
0 0 1 2 3 4 5
Reverse Voltage (V)
Reverse Characteristics
4-258
ZRC400
TYPICAL CHARACTERISTICS
1.6 1.4 1.2 4.10
Reference Voltage (V)
Forward Voltage (V)
Iref=100A
1.0
4.09
0.8 0.6
0.4 0.1 1 10 100 1000
4.08 -40
-20
0
20
40
60
80
100
Forward Current (mA)
Temperature (C)
Forward Characteristics
2 1000
Temperature Drift
Slope Resistance (Ohms)
1.5
Slope Resistance (Ohms)
Iref=150A
100
Iref=1mA
1
Ta=-40C
10
Iref=5mA
0.5
Ta=25C
1
Ta=85C
0 0.1
1
10
0.1 10
100
1K
10K
100K
Reference Current (mA)
Frequency (Hz)
Slope Resistance vs. Current
Slope Resistance vs. Frequency
4
5mA
4
5mA 150A
Vout (V)
Vout (V)
2
150A
2 0
VIN
1K2 5mA 39K 150A
VIN
1K2 5mA 39K 150A
0
10
10
Vin (V)
Vin (V)
200 400 600
0
0
0
0
2
4
6
Time (s)
Time (s)
Transient Response (Single Pulse)
4-259
Transient Response (Repetitive Pulse)
ZRC400
CONNECTION DIAGRAMS
E-Line, 3 pin Package Suffix - A SOT23 Package Suffix - F
Bottom View - Pin 1 floating or connected to pin 3
Top View - Pin 1 floating or connected to pin 2
4-260
ZRC400
ORDERING INFORMATION
Part No ZRC400A03 ZRC400A02 ZRC400A01 ZRC400F03 ZRC400F02 ZRC400F01 * E-Line 3 pin Tol% 3 2 1 3 2 1 Package E-Line * E-Line * E-Line * SOT23 SOT23 SOT23 Partmark ZRC40003 ZRC40002 ZRC40001 40D 40G 40H
4-261

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