Fast, Precision
a
Comparator
AD790
CONNECTION DIAGRAMS
FEATURES
8-Pin Plastic Mini-DIP (N)
45 ns max Propagation Delay
and Cerdip (Q) Packages
Single 5 V or Dual 15 V Supply Operation
CMOS or TTL Compatible Output
250 V max Input Offset Voltage
+V
500 V max Input Hysteresis Voltage S 1 8 V
LOGIC
AD790
15 V max Differential Input Voltage
+IN
OUTPUT
2 7
+
Onboard Latch
IN
60 mW Power Dissipation
3 6 GROUND
Available in 8-Pin Plastic and Hermetic Cerdip
V
45 LATCH
S
Packages
Available in Tape and Reel in Accordance with
EIA-481A Standard
8-Pin SOIC (R) Package
APPLICATIONS
Zero-Crossing Detectors
1 GROUND
OUTPUT 8
Overvoltage Detectors
AD790
Pulse-Width Modulators
7
2 LATCH
V
LOGIC
Precision Rectifiers
V
3 6
Discrete A/D Converters S
+V
S
Delta-Sigma Modulator A/Ds
4
+IN 5 IN
PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS
The AD790 is a fast (45 ns), precise voltage comparator, with a 1. The AD790s combination of speed, precision, versatility
number of features that make it exceptionally versatile and easy and low cost makes it suitable as a general purpose compara-
to use. The AD790 may operate from either a single 5 V supply tor in analog signal processing and data acquisition systems.
or a dual 15 V supply. In the single-supply mode, the AD790s
2. Built-in hysteresis and a low-glitch output stage minimize the
inputs may be referred to ground, a feature not found in other
chance of unwanted oscillations, making the AD790 easier to
comparators. In the dual-supply mode it has the unique ability
use than standard open-loop comparators.
of handling a maximum differential voltage of 15 V across its in-
3. The hysteresis combined with a wide input voltage range
put terminals, easing their interfacing to large amplitude and
enables the AD790 to respond to both slow, low level (e.g.,
dynamic signals.
10 mV) signals and fast, large amplitude (e.g., 10 V) signals.
This device is fabricated using Analog Devices Complementary
4. A wide variety of supply voltages is acceptable for operation
Bipolar (CB) processwhich gives the AD790s combination
of the AD790, ranging from single 5 V to dual +5 V/12 V,
of fast response time and outstanding input voltage resolution
5 V, or +5 V/15 V supplies.
(1 mV max). To preserve its speed and accuracy, the AD790
incorporates a low glitch output stage that does not exhibit
5. The AD790s power dissipation is the lowest of any compara-
the large current spikes normally found in TTL or CMOS output
tor in its speed range.
stages. Its controlled switching reduces power supply disturbances
6. The AD790s output swing is symmetric between V
LOGIC
that can feed back to the input and cause undesired oscillations.
and ground, thus providing a predictable output under a
The AD790 also has a latching function which makes it suitable
wide range of input and output conditions.
for applications requiring synchronous operation.
The AD790 is available in five performance grades. The
AD790J and the AD790K are rated over the commercial tem-
perature range of 0C to 70C. The AD790A and AD790B are
rated over the industrial temperature range of 40C to +85C.
The AD790S is rated over the military temperature range of
55C to +125C.
E
REV.
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
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use, nor for any infringements of patents or other rights of third parties that
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under any patent or patent rights of Analog Devices. 781/461-3113 2014
Fax: Analog Devices, Inc.,
+AD790* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS DESIGN RESOURCES
View a parametric search of comparable parts. AD790 Material Declaration
PCN-PDN Information
DOCUMENTATION
Quality And Reliability
Application Notes
Symbols and Footprints
AN-25: Applying the OP06 Op Amp As a High Precision
Comparator
DISCUSSIONS
AN-352: High Speed Comparators Provide Many Useful
View all AD790 EngineerZone Discussions.
Circuit Functions When Used Correctly
Data Sheet
SAMPLE AND BUY
AD790: Fast, Precision Comparator Data Sheet
Visit the product page to see pricing options.
REFERENCE DESIGNS
TECHNICAL SUPPORT
CN0123
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number.
REFERENCE MATERIALS
Product Selection Guide
DOCUMENT FEEDBACK
Comparators Product Brochure 2007
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