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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH 8CERDIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：with Latch
- Number of Elements：1
- Output Type：CMOS, TTL
- Voltage - Supply, Single/Dual (±)：4.5V ~ 7V, ±2.25V ~ 16.5V
- Voltage - Input Offset (Max)：1.5mV @ 5V
- Current - Input Bias (Max)：5µA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：10mA
- CMRR, PSRR (Typ)：95dB CMRR, 90dB PSRR
- Propagation Delay (Max)：50ns
- Hysteresis：500µV
- Operating Temperature：-55°C ~ 125°C
- Package / Case：8-CDIP (0.300", 7.62mm)
- Mounting Type：Through Hole
- Supplier Device Package：8-CERDIP
- Grade：-
- Qualification：-
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Overview
The AD790SQ is a high-speed, precision voltage comparator manufactured by Analog Devices Inc. It features a maximum propagation delay of 45 ns and operates from single 5 V or dual ±15 V supplies. The device includes an onboard latch for synchronous operation and offers CMOS or TTL compatible outputs. It is rated for the military temperature range of -55°C to +125°C and is available in an 8-lead CERDIP package.
Feature Summary
- Built-in latching function for retaining input information at the output during synchronous operations.
- Low-glitch output stage that minimizes current spikes and reduces power supply disturbances.
- Internal feedback mechanism provides built-in hysteresis to prevent unwanted oscillations.
- Capable of handling large differential input voltages up to 15 V across input terminals.
Applications
- Zero-Crossing Detectors
- Overvoltage Detectors
- Pulse-Width Modulators
- Precision Rectifiers
Procurement Notes
Verify the specific suffix SQ indicates the military-grade temperature rating (-55°C to +125°C) and the 8-lead CERDIP package configuration. Confirm RoHS compliance status if required by project specifications, as standard parts may vary. Ensure the ordering documentation matches the exact part number to avoid confusion with commercial or industrial grades.
Selection Notes
Select this component when military-grade reliability and extended temperature performance are required. The integrated latch simplifies circuit design for synchronous data acquisition systems. Consider the low power dissipation relative to its speed class when thermal management is a constraint in the application environment.
Part Context
This device belongs to the AD790 family of fast, precise comparators fabricated using Analog Devices' Complementary Bipolar process. The AD790 series is designed for analog signal processing and data acquisition systems, offering a combination of speed, precision, and versatility suitable for general-purpose comparison tasks.
Replacement Considerations
Public confirmed substitute part numbers include AD790JNZ and AD790JRZ. Verify pinout compatibility and electrical specifications before substitution.
FAQ
How does the AD790 handle bipolar signals with a single supply?
The AD790 can receive bipolar signals while powered from a single 5 V supply by clamping one input slightly below ground, allowing it to switch around that level and produce logic-compatible swings.
What is the purpose of the onboard latch?
The latch function retains the input information at the output. When Pin 5 is brought low, the comparator decision is held, preventing the output from responding to changing inputs until the latch is released.
