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Details, datasheet, quote on part number:ZR12DTA
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Datasheet text preview:
PRECISION 1.25 VOLT MICROPOWER VOLTAGE REFERENCE
ISSUE 3 - FEBRUARY 1998 DEVICE DESCRIPTION
The ZR12D uses a bandgap circuit design to achi eve a precision micropower voltage r e f e r e n c e of 1.25 volts. The device is available in a small outline SOT23 surface mount package, ideal for applications where space saving is important. The ZR12D design provides a stable voltage without an external capacitor and is stable w i t h capacitive loads. The ZR12D is recommended for operation between 50µA 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 a n d currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.
ZR12D
F EATURES
· · · · · · · · · · · · · · ·
Small outline SOT23 package No stabilising capacitor required Typical TC 30ppm/°C Typical slope resistance 0.65 ± 3% tolerance Industrial temperature range Operating current 50µA to 5mA Transient response, stable in less than 10µs Alternative package options and tolerances are available
APPLICATIONS
Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Data acquisition systems. Precision power supplies. Test equipment.
SCHEMATIC DIAGRAM
V
R
G nd
4-150
ZR12D
ABSOLUTE MAXIMUM RATING
Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85°C -55 to 125°C Power Dissipation (Tamb=25°C) SOT23 330mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25°C
SYMBOL PARAMETER CONDITIONS MIN VR IMIN IR TC RS § ZR Reverse Breakdown Voltage Minimum Operating Current Recommended Operating Current Average Reverse Breakdown Voltage Temp. Co. IR(min) to IR(max) Slope Resistance Reverse Dynamic Impedance Wideband Noise Voltage IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150µA f = 100Hz to 10kHz 0.05 30 IR=150µA 1.21 LIMITS TYP MAX 1.25 1.29 30 50 5 90 3 V µA mA ppm/°C TOL. % UNITS
0.65 2 0.5 1
EN
60 µV(rms)
Reverse Current (µA)
TC =
(VR(max)-VR(min)) x 1000000
60 50 40 30 20
TA C 5° C =8 5° =2 °C TA 40 =TA
VR x (T(max)-T(min))
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)
10 0 0 0.2 0.4 0.6
0.8
1.0
1.2
1.4
Reverse Voltage (V)
Reverse Characteristics
4-151
ZR12D
TYPICAL CHARACTERISTICS
1.4 1.27
Reference voltage (V)
Forward Voltage (V)
1.2 1.0 0.8 0.6 0.4 0.2 0.1 1 10 100 1000
1.26 1.25 1.24 1.23 1.22 1.21 -40 -20 0
IR=150µA to 5mA
20
40
60
80
Forward Current (mA)
Temperature (°C)
Forward Characteristics
Temperature Drift
1000
1.0
Slope resistance ()
100
Slope resistance ()
TA=-40°C 0.5 TA=25°C TA=85°C
IR=150µA
10
IR=1mA
1
IR=5mA
0.1 0 0.1 1 10 0.01 0.1 1 10 100
Reference Current (mA)
Frequency (kHz)
Slope Resistance v Current
Slope Resistance v Frequency
1.5
1.5
VR - (V)
1.0
VR - (V)
INPUT 58K OUTPUT
1.0
INPUT 1K8 OUTPUT
0.5
0.5
0
0
VIN - (V)
0 0 1 2 3 4
VIN - (V)
10
10 0 0 2 4 6 8
Time (µs)
Time (µs)
Transient Response (IR=150µA) µ
Transient Response (IR=5mA)
4-152
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