AD790

Features:

45 ns max Propagation Delay
Single +5 V or Dual 615 V Supply Operation
CMOS or TTL Compatible Output
250 V max Input Offset Voltage
500 V max Input Hysteresis Voltage
15 V max Differential Input Voltage Onboard Latch
60 mW Power Dissipation
Available in 8-Pin Plastic and Hermetic Cerdip Packages
MIL-STD-883B Processing Available
Available in Tape and Reel in Accordance with EIA-481A Standard


Application

·Zero-Crossing Detectors
·Overvoltage Detectors
·Pulse-Width Modulators
·Precision Rectifiers
·Discrete A/D Converters
·Delta-Sigma Modulator A/Ds


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
Internal Power Dissipation² . . . . . . . . . . . . . . . . . . . 500 mW
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . ±16.5 V
Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range
(N, R) . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +125
(Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150
Lead Temperature Range (Soldering 60 sec) . . . . . . . +300
Logic Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V


Description

The AD790 is a fast (45 ns), precise voltage comparator, with a number of features that make it exceptionally versatile and easy to use. The AD790 may operate from either a single +5 V supply or a dual ±15 V supply. In the single-supply mode, the AD790's inputs may be referred to ground, a feature not found in other comparators. In the dual-supply mode it has the unique ability of handling a maximum differential voltage of 15 V across its input terminals, easing their interfacing to large amplitude and dynamic signals.
This device is fabricated using Analog Devices' Complementary Bipolar (CB) processwhich gives the AD790's combination of fast response time and outstanding input voltage resolution (1 mV max). To preserve its speed and accuracy, the AD790 incorporates a "low glitch" output stage that does not exhibit the large current spikes normally found in TTL or CMOS output stages. Its controlled switching reduces power supply disturbances that can feed back to the input and cause undesired oscillations. The AD790 also has a latching function which makes it suitable for applications requiring synchronous operation. The AD790 is available in five performance grades. The AD790J and the AD790K are rated over the commercial temperature range of 0 to +70. The AD790A and AD790B are rated over the industrial temperature range of 40 to +85. The AD790S is rated over the military temperature range of 55°C to +125°C and is available processed to MIL-STD-883B, Rev. C.