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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- 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：0°C ~ 70°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The AD790JR-REEL7 is a fast, precision voltage comparator manufactured by Analog Devices Inc. in an 8-Lead SOIC_N package. It supports single 5 V or dual ±15 V supply operation with a maximum propagation delay of 45 ns and a maximum input offset voltage of 250 µV. The device features CMOS or TTL compatible outputs, onboard latching for synchronous operation, and a low glitch output stage to minimize power supply disturbances. It operates within a commercial temperature range of 0°C to 70°C.
Feature Summary
- Built-in hysteresis and a low-glitch output stage minimize unwanted oscillations.
- Wide differential input voltage capability handles large amplitude signals without external clamping.
- Onboard latch function retains input information at the output for synchronous applications.
- Single-supply mode allows inputs to be referred directly to ground.
Applications
- Zero-Crossing Detectors
- Overvoltage Detectors
- Precision Rectifiers
Procurement Notes
Verify that the ordering suffix -REEL7 corresponds to the tape and reel packaging format as specified in the official Analog Devices Ordering Guide. Confirm the component grade matches the required commercial temperature range (0°C to 70°C) for the AD790J series. Ensure the 8-Lead SOIC_N package option aligns with your PCB footprint requirements before finalizing procurement.
Selection Notes
Select this component when high-speed response combined with precision is required for analog signal processing. The AD790JR-REEL7 is suitable for general-purpose comparison tasks where low power dissipation and immunity to supply noise are critical. Consider the onboard latch feature if synchronous data capture is necessary for downstream logic interfaces.
Part Context
The AD790 is part of Analog Devices' portfolio of high-performance comparators fabricated using Complementary Bipolar (CB) process technology. This specific variant, AD790JR-REEL7, represents the commercial grade version packaged in surface-mount SOIC format. It is designed to offer a balance of speed, accuracy, and versatility for industrial and commercial data acquisition systems.
Replacement Considerations
Direct pin-compatible replacements include other grades within the AD790 family such as AD790KR or AD790AR, which share identical pinouts but differ in temperature ratings. For modern upgrades, consider newer high-speed comparers from Analog Devices like the ADCMP series, though interface compatibility must be verified.
FAQ
How does the AD790 handle bipolar signals on a single supply?
In single-supply mode, the AD790 allows inputs to be referred to ground, enabling it to receive bipolar signals while powered from a single 5 V supply, a feature not found in many standard comparers.
What is the purpose of the onboard latch?
The onboard latch retains the comparator's decision at the output when Pin 5 is brought low, holding the output state regardless of changing inputs until the latch is released.
