Ultrafast, 4 ns
Single-Supply Comparators
AD8611/AD8612
Data Sheet
PIN CONFIGURATIONS
4 ns propagation delay at 5 V
Single-supply operation: 3 V to 5 V
100 MHz input
Latch function
V+ 1
IN+ 2
8
AD8611
QA
7
QA
IN– 3
6 GND
TOP VIEW
V– 4 (Not to Scale) 5 LATCH
06010-001
FEATURES
Figure 1. 8-Lead Narrow Body SOIC
(R-8)
8
AD8611
IN– 3
TOP VIEW
(Not to Scale)
V– 4
QA
7
QA
6
GND
5
V+ 1
IN+ 2
LATCH
06010-002
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
Figure 2. 8-Lead MSOP
(RM-8)
QA
1
14
QB
QA
2
13
QB
GND
3
AD8612
12
GND
LEA
4
TOP VIEW
(Not to Scale)
11
LEB
V–
5
10
V+
INA–
6
9
INB–
INA+
7
8
INB+
06010-003
APPLICATIONS
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 VCC is less than 4.3 V.
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.
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/AD8612 are specified over the industrial temperature 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.
Rev. B
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