OPA340-EP Datasheet, PDF (10/17 Pages) Texas Instruments – SINGLE-SUPPLY RAIL-TO-RAIL OPERATIONAL AMPLIFIERS

OPA340-EP
OPA2340-EP
OPA4340-EP
SBOS433 – AUGUST 2008 ................................................................................................................................................................................................ www.ti.com
V+
Reference
Current
V_IN+
V_IN-
V_BIAS1
Class AB
Control
V_O
Circuitry
V_BIAS2
V-
(Ground)
Figure 24. Simplified Schematic
I_OVERLOAD
10mA max
V_IN
5kW
V+
OPAx340
V_OUT
Figure 25. Input Current Protection for Voltages Exceeding the Supply Voltage
RAIL-TO-RAIL OUTPUT
A class AB output stage with common-source
transistors is used to achieve rail-to-rail output. For
light resistive loads (> 50 kΩ), the output voltage is
typically a few millivolts from the supply rails. With
moderate resistive loads (2 kΩ to 50 kΩ), the output
can swing to within a few tens of millivolts from the
supply rails and maintain high open-loop gain. See
the typical characteristic curve Output Voltage Swing
vs Output Current.
10
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