DAC8581

Input = ± 5V

500 nF

OPA187

±15V

±

+

+15V

1 k

10 k

GND

10 k

OPA548

±30V

±

+

+30V

40 k

500 nF

Output = ± 25V

Copyright © 2016, Texas Instruments Incorporated

15 V

100 m

Load

V

100

20 k

150

pF

Copyright © 2016, Texas Instruments Incorporated

OPA187

24

OPA187, OPA2187, OPA4187

SBOS807B – DECEMBER 2016 – REVISED OCTOBER 2018

www.ti.com

Product Folder Links: OPA187 OPA2187 OPA4187

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Copyright © 2016–2018, Texas Instruments Incorporated

8.2.4 Low-Side Current Monitor

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 45. Low-Side Current Monitor

8.2.5 Programmable Power Supply

Figure 46 shows the OPAx187 configured as a precision programmable power supply using the 16-bit, voltage

output DAC8581 and the OPA548 high-current amplifier. This application amplifies the digital-to-analog converter

(DAC) voltage by a value of five, and handles a large variety of capacitive and current loads. The OPAx187 in

the front-end provides precision and low drift across a wide range of inputs and conditions. Click the following

link to download the TINA-TI file: Programmable Power-Supply Circuit.

Figure 46. Programmable Power Supply