11

LT1112/LT1114

APPLICATI

TYPICAL

Dual Buffered

±0.617V Reference Powered by Two AA Batteries

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of circuits as described herein will not infringe on existing patent rights.

SCHE ATIC DIAGRA

(1/2 LT1112, 1/4 LT1114)

–

+

1/2 LT1112

15k

*OPTIONAL

+1.5V

+0.617V

LT1004-1.2

100pF

*OPTIONAL

–1.5V

–0.617V

TOTAL SUPPLY CURRENT = 700

µA

WORKS WITH BATTERIES DISCHARGED

TO ±1.3V

AT ±1.5V: MAXIMUM LOAD CURRENT = 800

µA;

TEMPERATURE COEFFICIENT LIMITED BY

REFERENCE = 20ppm/°C

LT1112/14 • TA03

1/2 LT1112

20k

0.1%

20k

0.1%

12pF

30k

Q35

800

Ω

30pF

Q34

Q5

Q6

4k

35

µA

20

µA

Q22

Q21

Q8

Q4

Q7

Q13

Q3

S

Q2

S

Q1

S

INVERTING

INPUT

NONINVERTING

INPUT

S

Q9

Q10

Q11

50k

1.5k

Q12

15

µA

5

µA

5

µA

J1

460

Ω

Q15

Q14

460

Ω

460

Ω

Q17

Q25

Q19

Q27

1.5k

Q33

Q29

80

µA

28

Ω

90

Ω

30

Ω

Q20

OUT

Q26

Q30

Q31

200

Ω

200

Ω

Q24

Q16

2.5k

Q32

Q28

Q1 TO Q4 ARE SUPERGAIN TRANSISTORS

LT1112/14 • SD01

10k

Q18

+

–

30k

Q23

3k