AMP01

–16–

REV. D

R1

100

R2

200

TRIM

SENSE

7

9

8

REFERENCE

10

11

15

14

12

13

18

1

2

3

2k

+IN

–IN

2k

–15V

0.047 F

0.047 F

+15V

COMPLIANCE, TYPICALLY

10V

LINEARITY ~0.01%

OUTPUT RESISTANCE AT 20mA ~5M

POWER BANDWIDTH (–3dB) ~60kHz

INTO 500

LOAD

(

)

20

R1

AMP01

R1 = 100

V+

V–

Figure 36. High Compliance Bipolar Current Source with 13-Bit Linearity

7

9

8

10

11

15

14

12

13

18

1

2

3

2.75k

+IN

–IN

0V

2k

0.047 F

AMP01

DIFFERENTIAL INPUT OF 100mV FOR 16mA SPAN

OUTPUT RESISTANCE ~5M

LINEARITY 0.01% OF SPAN

0.047 F

R5

2.21k

R6

500

ZERO TRIM

R2

200

REF-02

R3

100

4

6

2

R1

100

+15V

TO +30V

4mA TO 20mA

–5V

ALL RESISTORS 1% METAL FILM

V–

V+

R4

100

Figure 37. 13-Bit Linear 4–20 mA Transmitter Constructed by Adding a Voltage Reference.

Thermocouple Signals Can Be Accepted Without Preamplification.