Datasheet

Ultrafast, 4 ns
Single-Supply Comparators
AD8611/AD8612
Rev. A
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FEATURES
4 ns propagation delay at 5 V
Single-supply operation: 3 V to 5 V
100 MHz input
Latch function
APPLICATIONS
High speed timing
Clock recovery and clock distribution
Line receivers
Digital communications
Phase detectors
High speed sampling
Read channel detection
PCMCIA cards
Zero-crossing detector
High speed analog-to-digital converter (ADC)
Upgrade for LT1394 and LT1016 designs
PIN CONFIGURATIONS
V+
IN+
V–
IN–
QA
QA
GND
LATCH
1
2
3
4
8
7
6
5
AD8611
TOP VIEW
(Not to Scale)
06010-001
Figure 1. 8-Lead Narrow Body SOIC
(R-8)
QA
V+ 1
IN+ 2
IN– 3
V–
4
8
QA 7
GND 6
LATCH
5
AD8611
TOP VIEW
(Not to Scale)
06010-002
Figure 2. 8-Lead MSOP
(RM-8)
GND
LEA
V–
INA–
INA
+
GND
LEB
V+
INB–
INB+
QA
QA
QB
Q
B
1
2
3
4
5
6
7
AD8612
14
13
12
11
10
9
8
TOP VIEW
(Not to Scale)
06010-003
Figure 3. 14-Lead TSSOP
(RU-14)
GENERAL DESCRIPTION
The AD8611/AD8612 are single and dual 4 ns comparators
with latch function and complementary output. The latch is not
functional if V
CC
is less than 4.3 V.
Fast 4 ns propagation delay makes the AD8611/AD8612 good
choices for timing circuits and line receivers. Propagation delays
for rising and falling signals are closely matched and tracked over
temperature. This matched delay makes the AD8611/AD8612
good choices for clock recovery because the duty cycle of the
output matches the duty cycle of the input.
The AD8611 has the same pinout as the LT1016 and LT1394,
with lower supply current and a wider common-mode input
range, which includes the negative supply rail.
The AD8611/AD8612 are specified over the industrial temper-
ature range (−40°C to +85°C). The AD8611 is available in both
8-lead MSOP and narrow 8-lead SOIC surface-mount packages.
The AD8612 is available in a 14-lead TSSOP surface-mount
package.