ANALOG DEVICES AD8468 Service Manual
Rail-to-Rail, Fast, Low Power 2.5 V to 5.5 V,
AD8468
AD8468
NONINVERTING
INPUT
INVERTING
INPUT
Q OUTPUT
+
–
S
DN
08853-001
FEATURES
Fully specified rail to rail at VCC = 2.5 V to 5.5 V
Input common-mode voltage from −0.2 V to V
Low glitch CMOS-/TTL-compatible output stage
40 ns propagation delay
Low power: 2 mW at 2.5 V
Shutdown pin
Power supply rejection > 60 dB
−40°C to +125°C operation
Qualified for automotive applications
APPLICATIONS
Automotive applications
High speed instrumentation
Clock and data signal restoration
Logic level shifting or translation
High speed line receivers
Threshold detection
Peak and zero-crossing detectors
High speed trigger circuitry
Pulse-width modulators
Current-/voltage-controlled oscillators
CC
Single-Supply TTL/CMOS Comparator
FUNCTIONAL BLOCK DIAGRAM
+ 0.2 V
Figure 1.
GENERAL DESCRIPTION
The AD8468 is a fast comparator fabricated on XFCB2.0, an
Analog Devices, Inc., proprietary process. This comparator is
exceptionally versatile and easy to use. Features include an input
range from −0.2 V to V
compatible output drivers, and shutdown inputs. The device
offers 40 ns propagation delays driving a 15 pF load with 10 mV
overdrive on 500 µA typical supply current.
A flexible power supply scheme allows the device to operate
with a single 2.5 V positive supply with a −0.2 V to + 2.7 V
input signal range and up to a 5.5 V positive supply with a
−0.2 V to +5.7 V input signal range.
+ 0.2 V, low noise, TTL-/CMOS-
CC
The TTL-/CMOS-compatible output stage is designed to drive
up to 15 pF with full rated timing specifications and to degrade
in a graceful and linear fashion as additional capacitance is
added. The input stage of the comparator offers robust protection against large input overdrive, and the outputs do not phase
reverse when the valid input signal range is exceeded.
The AD8468 is available in a tiny 6-lead SC70 package with a
single-ended output and a shutdown pin.
Rev. 0
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