LMH6642Q-Q1_15 Datasheet, PDF (21/34 Pages) Texas Instruments – Low Power, 130 MHz, 75 mA Rail-to-Rail Output Amplifiers

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LMH6642Q-Q1, LMH6643Q-Q1
SNOSC61C – JANUARY 2012 – REVISED SEPTEMBER 2014
Circuit Description (continued)
This device family was designed to avoid output phase reversal. With input overdrive, the output is kept near
supply rail (or as closed to it as mandated by the closed loop gain setting and the input voltage). See Figure 54:
Input
Output _V+
V_S = ±2.5V
V^-
A_V = +1
1V/DIV
200 ns/DIV
Figure 54. Input and Output Shown with CMVR Exceeded
However, if the input voltage range of −0.5V to 1V from V⁺ is exceeded by more than a diode drop, the internal
ESD protection diodes will start to conduct. The current in the diodes should be kept at or below 10mA.
Output overdrive recovery time is less than 100ns as can be seen from Figure 55 plot:
V_IN (1 V/DIV)
V_S=±5V, V_IN=5V_PP
A_V=+5, R_F=R_L=2k
2 V/DIV
V_OUT (2 V/DIV)
100 ns/DIV
Figure 55. Overload Recovery Waveform
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