Device

3 V

1 MW

60 kW

100 kW

1 MW

NTC

Thermistor

Device

ADS1100

Load

V

I C

2

R

1

4.99 kW

R

3

4.99 kW

R

4

48.7 kW

R

2

49.9 kW

5 V

3 V

REF3130

R

7

1.18 kW

R

SHUNT

1 W

R

6

71.5 kW

R

N

56 W

R

N

56 W

(PGA Gain = 4)

FS = 3 V

Stray Ground-Loop Resistance

I

LOAD

R

1

V

EX

V

OUT

V

REF

R

1

Device

R

R

R

R

5 V

TLV333, TLV2333, TLV4333

www.ti.com

SBOS751 – DECEMBER 2015

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 System Examples

Figure 21 shows the basic configuration for a bridge amplifier.

A low-side current shunt monitor is shown in Figure 22.

Figure 21. Single Op Amp Bridge Amplifier

NOTE: 1% resistors provide adequate common-mode rejection at small ground-loop errors.

Figure 22. Low-Side Current Monitor

ADS1100 is a 16-bit converter, a precise reference is essential for maximum accuracy. If absolute accuracy is

not required, and the 5-V power supply is sufficiently stable, the REF3130 can be omitted.

Figure 23 shows the TLV333 in a typical thermistor circuit.

Figure 23. Thermistor Measurement

Copyright © 2015, Texas Instruments Incorporated

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