REF-01/REF-02
Precision
Voltage References
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FEATURES
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DESCRIPTIO
Trimmed Output ±0.3%
Low Drift—5ppm/°C Typ
Low Noise—3ppm(P-P)
High Line Rejection
Temperature Output—REF-02
Low Supply Current 1.4mA Max
The REF-01/REF-02 are precision 10V and 5V bandgap
references which provide stable output voltages over a
wide range of operating conditions. Output voltage is
accurate to ±0.3% with a low 5ppm/°C typical temperature
coefficient. The REF-01 and REF-02 are excellent choices
for applications where low drift, moderate accuracy, low
power consumption and low cost are considerations.
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APPLICATIO S
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The REF-02 includes a temperature output pin which
provides a linear voltage proportional to absolute temperature.
A/D and D/A Converters
Precision Regulators
Constant Current Sources
V/F Converters
Bridge Excitation
For lower drift and higher accuracy references, please see
the LT1019 and LT1021 data sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
Ultra Linear Strain Gauge Amplifier
REF-02
OUT
GND
350Ω
BRIDGE
A1†
LT307
R2
20k
R4
20k
–
ACTIVE
ELEMENT
R5
2M
1.003
–
A2
LT1001
GAIN = 100
+
R6
2M**
TA01a
–5V
*REDUCES REFERENCE AND AMPLIFIER LOADING.
**IF R6 = R3, BRIDGE IS NOT LOADED BY R2 AND R4.
†
A1 VOS AND DRIFT ARE NOT CRITICAL.
357Ω*
1/2W
–15V
OUTPUT VOLTAGE (NORMALIZED)
IN
R3
2M
5V
+
412Ω*
1/2W
15V
Output Voltage Temperature Drift
1.002
0°C TO 70°C BOX GUARANTEED FOR
REF-01E AND REF-02E (8.5ppm/°C)
1.001
1.000
0.999
0.998
FULL TEMP RANGE BOX GUARANTEED FOR
REF-01A AND REF-02A (8.5ppm/°C)
0.997
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
TA01b
1
