OPA188AIDBVT datasheet(21/33 Pages) TI

Part #	OPA188AIDBVT

Description	Precision, Low-Noise, Rail-to-Rail Output,36-V, Zero-Drift Operational Amplifiers

PDF	33 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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21 / 33 page

OPA188

15V

RIN

RSHUNT

Load

ILOAD

VOUT

100m

VOUT= ILOAD*RSHUNT(1+RF/RIN)

VOUT / ILOAD= 1V/49.75mA

100

20k

150pF

OPA188

15V

VOUT

VREF

OPA188

www.ti.com

SBOS642A – MARCH 2013 – REVISED MARCH 2013

Figure 45 shows the basic configuration for a bridge amplifier. Click the following link to download the TINA-TI

file: Bridge Amplifier Circuit.

Figure 45. Bridge Amplifier

Figure 46 shows the OPA188 configured in a low-side current-sensing application. The load current (ILOAD)

creates a voltage drop across the shunt resistor (RSHUNT). This voltage is amplified by the OPA188, with a gain of

201. The load current is set from 0 A to 500 mA, which corresponds to an output voltage range from 0 V to 10 V.

The output range can be adjusted by changing the shunt resistor or gain of the configuration. Click the following

link to download the TINA-TI file: Current-Sensing Circuit.

Figure 46. Low-Side Current Monitor

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Product Folder Links: OPA188

OPA188AIDBVT Datasheet(PDF) 21 Page - Texas Instruments