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PRECISION 5.0 VOLT MICROPOWER VOLTAGE REFERENCE
ISSUE 2 - FEBRUARY 1998 DEVICE DESCRIPTION
The ZREF50 uses a bandgap circuit design to achieve a precision micropower voltage reference of 5.0 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 ZREF50 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZREF50 is recommended for operation between 50A and 15mA 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.
ZREF50
FEATURES
* * * * * * * * * * * * * *
Small outline SO8 and TO92 style packages No stabilising capacitor required Typical TC 15ppm/C Typical slope resistance 0.33 1% tolerance Industrial temperature range (Military temperature range available on request) Operating current 50A to 15mA Transient response, stable in less than 10s Alternative package options and tolerances are available Battery powered and portable equipment. Metering and measurement systems. Instrumentation. Test equipment. Data acquisition systems.
APPLICATIONS
SCHEMATIC DIAGRAM
V
R
G nd
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ZREF50
ABSOLUTE MAXIMUM RATING
Reverse Current Forward Current Operating Temperature Storage Temperature 25mA 25mA -40 to 85C -55 to 125C Power Dissipation (Tamb=25C) E-Line, 3 pin (TO92) 500mW E-Line, 2 pin (TO92) 500mW SO8 625mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated) Tamb=25C
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. Slope Resistance Reverse Dynamic Impedance IR(min) to IR(max) IR = 1mA f = 100Hz IAC= 0.1 IR IR = 150A f = 10Hz to 10kHz 0.05 15 IR=150A 4.95 LIMITS TYP MAX 5.0 30 5.05 50 15 50 1 V A mA ppm/C TOL. % UNITS
0.33 1.5 0.4 1
EN
Wideband Noise Voltage
105 V(rms)
TC =
Note: VR(max) - VR(min) is the maximum deviation in reference voltage measured over the full operating temperature range.
Reverse Current (A)
(VR(max)-VR(min)) x 1000000 VR x (T(max)-T(min))
60 50 40 TA=85C 30 20 10 TA=-40C 0 0 2.0 4.0 6.0
RS =
VR Change(IR (min) to IR (max))
IR (max) - IR (min)
Reverse Voltage (V)
Reverse Characteristics
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ZREF50
TYPICAL CHARACTERISTICS
1.6 1.4 5.02 IR=150A to 15mA
Reference voltage (V)
0.1 1 10 100 1000
Forward Voltage (V)
1.2 1.0 0.8 0.6 0.4
5.00
4.98
4.96 -40 -20 0 20 40 60 80
Forward Current (mA)
Temperature (C)
Forward Characteristics
Temperature Drift
3.0
1000
IR=150A
Slope resistance ()
2.0
Slope resistance ()
100
IR=5mA
10
TA=-40C 1.0 TA=25C TA=85C 0 0.1 1 10 100
1
0.1 0.01 0.1 1 10 100
Reference Current (mA)
Frequency (kHz)
Slope Resistance v Current
6.0
5 mA
Slope Resistance v Frequency
6.0
4.0
4.0
VR - (V)
VIN
VIN
1K 5mA 33K 150A VR
VR - (V)
2.0
150 A
1K 5mA
33K 150A VR
2.0
0 10
0 10
VIN - (V)
0 0 500 1000
VIN - (V)
0 0 1 2 3 4
Time (s)
Time (s)
Transient Response (Single Pulse)
Transient Response (Repetitive Pulse)
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ZREF50
CONNECTION DIAGRAMS
E-Line, 2 pin Package Suffix - Y E-Line, 3 pin,Rev Package Suffix - R
Bottom View
Bottom View - Pin 3 floating or connected to pin 1
SO8 Package Suffix - N8
Top View
ORDERING INFORMATION
Part No Tol% Package Partmark
ZREF50D ZREF50Z ZREF50
1 1 1
SO8 E-Line * E-Line
ZREF50 ZREF50 ZREF50
* E-Line 3 pin Reversed E-Line 2 pin
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