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OPA2188 Datasheet(PDF) 28 Page - Texas Instruments

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Part # OPA2188
Description  OPAx182 36-V, 5-MHz, Low-Noise, Zero-Drift, MUX-Friendly, Precision Op Amps
PDF  43 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

OPA2188 Datasheet(HTML) 28 Page - Texas Instruments

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9.2.4 Programmable Power Supply
Figure 9-6 shows the OPAx182 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 OPAx182 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™ software file: Programmable Power-Supply Circuit.
DAC8581
Input = ± 5V
C2
500 nF
OPAx182
±15V
±
+
+15V
R2
1 k
R1
10 k
GND
R3
10 k
OPA548
±30V
±
+
+30V
R4
40 k
C1
500 nF
VOUT
Output = ± 25V
Copyright © 2017, Texas Instruments Incorporated
Figure 9-8. Programmable Power Supply
9.2.5 RTD Amplifier With Linearization
See the Analog Linearization of Resistance Temperature Detectors analog design journal for an in-depth
analysis of Figure 9-9. Click the following link to download the TINA-TI™ software file: RTD Amplifier with
Linearization.
OPAx182
RTD
Pt100
R5
105.8 kŸ
(1)
V
OUT
R3
60.4 kŸ
R1
4.99 kŸ
R2
49.1 kŸ
R4
1 kŸ
1 µF
1 µF
REF5050
15 V
In
Out
(5 V)
0°C = 0 V
200°C = 5 V
Copyright © 2017, Texas Instruments Incorporated
(1) R5 provides positive-varying excitation to linearize output.
Figure 9-9. RTD Amplifier With Linearization
OPA182, OPA2182, OPA4182
SBOS936D – DECEMBER 2019 – REVISED DECEMBER 2021
www.ti.com
28
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Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: OPA182 OPA2182 OPA4182



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