LT1013, LT1013A, LT1013D

DUAL PRECISION OPERATIONAL AMPLIFIERS

SLOS018H − MAY 1988 − REVISED NOVEMBER 2004

22

POST OFFICE BOX 655303

APPLICATION INFORMATION

To Inverter

Drive

5 V

100 k

Ω

10 k

Ω†

68 k

Ω†

4.3 k

Ω

5 V

LT1004

1.2 V

4 k

Ω†

2 k

Ω

4-mA

Trim

IN

0 to 4 V

1 k

Ω

20-mA

Trim

301

Ω†

0.1

Ω

T1

10

µF

4 mA to 20 mA

Fully Floating

1N4002 (4)

1/2

LT1013

+

† 1% film resistor

+

−

+

−

1/2

LT1013

Figure 31. Fully Floating Modification to 4-mA to 20-mA Current-Loop Transmitter With 8-Bit Accuracy

IN+

IN+

IN−

IN−

6

18

7

13

11

12

14

R2

R1

OUT B

3

2

1

µF

5

6

5 V

OUT A

R2

R1

0.01

µF

1

µF

1

µF

1

µF

1/2

LT1013

1/2

LT1013

+

+

−

−

1

7

4

15

1/2 LTC1043

1/2 LTC1043

5

8

2

3

8

NOTE A: VIO = 150 µV, AVD = (R1/R2) + 1, CMRR = 120 dB, VICR = 0 to 5 V

Figure 32. 5-V Single-Supply Dual Instrumentation Amplifier