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| OPA454_16 Datasheet, PDF (29/47 Pages) Texas Instruments – High-Voltage (100-V), High-Current (50-mA) Operational Amplifiers | |||
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System Examples (continued)
25kW
V1
25kW
OPA454
SBOS391B â DECEMBER 2007 â REVISED MARCH 2016
OPA454
A1
25kW
25kW
R
V2
OPA454
A2
Load IO
IO = (V2 - V1)/R
Figure 76. Differential Input Voltage-to-Current Converter for Low IOUT
A red light emitting diode (LED) was used to generate Figure 77.
6V
14
12
VOUT
10
8
6
4
VLED
0V
2
0
-2V
-2
5ms/div
Figure 77. Avalanche Photodiode Circuit
Gain of the avalanche photodiode (APD) is adjusted by changing the voltage across the APD. Gain starts to
increase when reverse voltage is increased beyond 130 V for this APD diode. See Figure 78.
Copyright © 2007â2016, Texas Instruments Incorporated
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