5 V Precision Voltage

Reference/Temperature Transducer

REF02

Rev. F

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However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

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Fax: 781.326.8703

© 2004 Analog Devices, Inc. All rights reserved.

FEATURES

PIN CONFIGURATIONS

5 V output, ±0.3% max

Temperature voltage output, 1.96 mV/°C

Adjustment range, ±3% min

Excellent temperature stability, 8.5 ppm/°C max

Low noise, 15 µV p-p max

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

Short-circuit proof

1

2

3

4

5

6

7

8

NC

GROUND

(CASE)

NC

NC

NC

TRIM

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)

REF02

TOP VIEW

(Not to Scale)

NC

NC

TRIM

8

7

6

5

NC = NO CONNECT. DO NOT CONNECT ANYTHING

ON THESE PINS. SOME OF THEM ARE RESERVED

FOR FACTORY TESTING PURPOSES.

GENERAL DESCRIPTION

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)

4

NC

5

6

NC

7

TEMP

8

NC

18

NC

17

NC

16

NC

15

14

NC

19

20

1

2

3

13

12

11

10

9

REF02

TOP VIEW

(Not to Scale)

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)

Z PACKAGE AND

18k

Ω

2k

Ω

6.1k

Ω

883C PRODUCT

REF02 OPTION

R9

R11

R12

P, S, RJ PACKAGES 18k

Ω

4.5k

Ω

15k

Ω

OUTPUT RESISTORS

C1

R3

R6

R4

R5

R1

Q1

R2

R10

OUTPUT

GROUND

R12*

TRIM

Q19

R15

INPUT

Q15

Q18

Q16

Q13

Q21

Q17

R13

Q20

Q4

Q3

Q5

Q6

Q9

Q7

Q14

Q12

Q11

Q8

R8

R7

R14

Q10

Q2

R11*

R9*

4

5

6

2

TEMP

3

*SEE OUTPUT RESISTORS

Figure 4. Simplified Schematic