Datasheet

PA_VS1 PA_VS2 T_SENSE
PA_OUT1
PA_OUT2
PA_ISETPA_GND1PA_GND1
PA_IN
Power
Amplifier
Inside the AFE030
R
SET
+
100 nF47 Fm
PA Supply
C
IN
PA_VS1 PA_VS2 T_SENSE
PA_OUT1
PA_OUT2
PA_ISETPA_GND1PA_GND1
PA_IN
Power
Amplifier
Inside the AFE030
AFE030
SBOS588A –DECEMBER 2011– REVISED DECEMBER 2011 www.ti.com
BLOCK DESCRIPTIONS
PA Block
The Power Amplifier (PA) block consists of a high slew rate, high-voltage, and high-current operational amplifier.
The PA is configured with an inverting gain of 6.5 V/V, has a low-pass filter response, and maintains excellent
linearity and low distortion. The PA is specified to operate from 7 V to 26 V and can deliver up to ±1.0 A of
continuous output current over the specified junction temperature range of –40°C to +125°C. Figure 25 illustrates
the PA block.
Figure 25. PA Block Equivalent Circuit
Connecting the PA in a typical PLC application requires only two additional components: an ac coupling
capacitor, C
IN
, and the current limit programming resistor, R
SET
. Figure 26 shows the typical connections to the
PA block.
Figure 26. Typical Connections to the PA
22 Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): AFE030