ADCMP605 Analog Devices, ADCMP605 Datasheet - Page 12

• Manufacturer Part Number: ADCMP605
• Description: (ADCMP604 / ADCMP605) Single-Supply LVDS Comparators
• Manufacturer: Analog Devices

ADCMP604/ADCMP605
CROSSOVER BIAS POINTS
Rail-to-rail inputs of this type, in both op amps and
comparators, have a dual front-end design. Certain devices are
active near the V
250
200
150
100
50
0
50
V
CC
100
Figure 20. Hysteresis vs. R
= 5.5V
CC
150
rail and others are active near the V
V
CC
HYSTERESIS RESISTOR (kΩ)
= 2.5V
200
250
300
HYS
Control Resistor
350
400
450
EE
500
rail. At
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some predetermined point in the common-mode range, a
crossover occurs. At this point, normally V
the bias current reverses and there are changes in measured offset
voltages and currents.
MINIMUM INPUT SLEW RATE REQUIREMENT
With the rated load capacitance and normal good PC Board
design practice, as discussed in the Optimizing Performance
section, these comparators should be stable at any input slew
rate with no hysteresis. Broadband noise from the input stage is
observed in place of the violent chattering seen with most other
high speed comparators. With additional capacitive loading or
poor bypassing, oscillation is observed. This oscillation is due to
the high gain bandwidth of the comparator in combination with
feedback parasitics in the package and PC board. In many
applications, chattering is not harmful.
CC
/2, the direction of