MCP651 Input Offset Evaluation Board User’s Guide
DS51834A-page 20
©
2009 Microchip Technology Inc.
3.2.2
Output Headroom
The DUT’s output headroom needs to be close enough to 0V to not overdrive U2 or U3.
The maximum DUT V
OH
and V
OL
values supported (relative to V
CM
) are:
EQUATION 3-2:
Rail-to-rail output op amps, on a single supply voltage, must be less than 7.5V.
3.2.3
Gain Bandwidth Product
There is a minimum Gain Bandwidth Product (GBWP) to keep the feedback loop
stable, and a maximum GBWP to avoid crosstalk and other issues.
EQUATION 3-3:
V
OH
V
CM
–
7.5V
≤
V
CM
V
OL
–
7.5V
≤
500 kHz GBWP 100 MHz
≤
≤
