5 V Precision Voltage
Reference/Temperature Transducer
REF02
FEATURES
PIN CONFIGURATIONS
NC
8
5 V output, 0.3ꢀ max
NC
NC
1
3
7
5
Temperature voltage output, 1.96 mV/°C
Adjustment range, 3ꢀ min
Excellent temperature stability, 8.5 ppm/°C max
Low noise, 15 µV p-p max
V
2
6
V
OUT
IN
NC
TRIM
4
GROUND
(CASE)
Low supply current, 1.4 mA max
Wide input voltage range, 7 V to 40 V
High load-driving capability, 10 mA
No external components
NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
Figure 1. TO-99 (J-Suffix)
8
7
6
5
NC
NC
NC
1
2
3
4
Short-circuit proof
REF02
V
IN
TOP VIEW
TEMP
GND
V
OUT
(Not to Scale)
TRIM
GENERAL DESCRIPTION
NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
The REF02 precision voltage reference provides a stable 5 V
output that can be adjusted over a ±±6 range with minimal
effect on temperature stability. Single-supply operation over an
input voltage range of 7 V to 40 V, low current drain of 1 mA,
and excellent temperature stability are achieved with an
improved band gap design. Low cost, low noise, and low power
make the REF02 an excellent choice whenever a stable voltage
reference is required. Applications include DACs and ADCs,
portable instrumentation, and digital voltmeters. The versatility
of the REF02 is enhanced by its use as a monolithic temperature
transducer. For new designs, refer to ADR02.
Figure 2. 8-Lead PDIP (P-Suffix), 8-Lease CERDIP (Z-Suffix),
8-Lead SOIC (S-Suffix)
3
2
1
20 19
4
5
6
7
8
18
17
16
15
14
NC
NC
NC
NC
V
IN
REF02
NC
TEMP
NC
TOP VIEW
(Not to Scale)
V
OUT
NC
9
10 11 12 13
NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
Figure 3. REF02RC/883 LCC (RC-Suffix)
INPUT
2
OUTPUT RESISTORS
R8
R7
R14
REF02 OPTION
R9
R11
R12
Z PACKAGE AND
883C PRODUCT
18kΩ
2kΩ
6.1kΩ
Q15
R15
Q14
Q13
Q8
Q7
Q9
P, S, RJ PACKAGES 18kΩ
4.5kΩ
15kΩ
Q18
Q12
Q11
Q16
Q19
Q21
C1
R4
Q17
Q10
R6
Q6
Q5
OUTPUT
6
5
4
R13
R3
R12*
R9*
Q4
Q3
TRIM
R5
≈
1.23V
Q20
R10
Q2
Q1
R1
R11*
3
TEMP
R2
GROUND
*SEE OUTPUT RESISTORS
Figure 4. Simplified Schematic
Rev. F
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