9

®

INA132

FIGURE 7. Precision Voltage-to-Current Conversion.

The difference amplifier is a highly versatile building

block that is useful in a wide variety of applications. See

the INA105 data sheet for additional applications ideas,

including:

• Current Receiver with Compliance to Rails

• Precision Unity-Gain Inverting Amplifier

•

±10V Precision Voltage Reference

•

±5V Precision Voltage Reference

• Precision Unity-Gain Buffer

• Precision Average Value Amplifier

• Precision G = 2 Amplifier

• Precision Summing Amplifier

• Precision G = 1/2 Amplifier

• Precision Bipolar Offsetting

• Precision Summing Amplifier with Gain

• Instrumentation Amplifier Guard Drive Generator

• Precision Summing Instrumentation Amplifier

• Precision Absolute Value Buffer

• Precision Voltage-to-Current Converter with Differential

Inputs

• Differential Input Voltage-to-Current Converter for Low

• Isolating Current Source

• Differential Output Difference Amplifier

• Isolating Current Source with Buffering Amplifier for

Greater Accuracy

• Window Comparator with Window Span and Window

Center Inputs

• Precision Voltage-Controlled Current Source with Buff-

ered Differential Inputs and Gain

• Digitally Controlled Gain of

±1 Amplifier

5

7

6

3

V

3

INA132

2

4

V

2

1

4

2

+15V

OPA27

REF10

6

10V

I

0V to 10V

In

12.5k

Ω

1k

Ω

50k

Ω

R

LOAD

V+

Set R

50.1

Ω

R

1

50.1

Ω

2N3904

40k

Ω

40k

Ω

40k

Ω

40k

Ω

For 4-20mA applications,

the REF10 sets the 4mA

low-scale output for 0V input.

I

+

1

40k

Ω

1

R

2