ADI AD790JNZ

The AD790 is a fast (45 ns), precision voltage comparator featuring a rich set of functional characteristics and ease of use. The device can be powered by a 5 V single supply or ±15 V dual supplies. In single-supply mode, the AD790's inputs can be referenced to ground — a feature not available in other comparators. In dual-supply mode, it offers the unique ability to handle up to 15 V differential voltage at the input pins, simplifying interfacing with large-amplitude dynamic signals.

The AD790 is fabricated using a complementary bipolar (CB) process, delivering fast response time and excellent input voltage resolution (0.1 mV maximum). To maintain speed and accuracy, the device incorporates a "low glitch" output stage that eliminates the large current spikes commonly associated with TTL or CMOS output stages. The controlled switching of the device reduces power supply disturbances, which can feed back to the input and cause spurious oscillations. In addition, the AD790 features a latch function, making it suitable for applications requiring synchronous operation.

The AD790 is graded into five performance levels. The AD790J and AD790K are rated for the commercial temperature range of 0°C to 70°C. The AD790A and AD790B are rated for the industrial temperature range of -40°C to +85°C. The AD790S is rated for -55°C to +125°C.

• 45 ns maximum propagation delay
• 5 V single supply or 15 V dual supply operation
• CMOS or TTL compatible output
• 250 μV maximum input offset voltage
• 500 μV maximum input hysteresis voltage
• 15 V maximum differential input voltage
• On-chip latch
• 60 mW power dissipation
• Available in 8-pin plastic and hermetic Cerdip packages
• Tape and reel packaging per EIA-481A standard
• The AD790 combines speed, precision, versatility, and low cost, making it suitable as a general-purpose comparator in analog signal processing and data acquisition systems
• The AD790's built-in hysteresis and low-glitch output stage minimize the likelihood of unwanted oscillations, making the device easier to use than standard open-loop comparators
• The AD790 combines hysteresis and wide input voltage range to respond to slow, low-level signals (e.g., 10 mV) as well as fast, large-amplitude signals (e.g., 10 V)
• The AD790 operates over a wide supply voltage range, from 5 V single supply to +5 V/−12 V, ±5 V, or +5 V/±15 V dual supply
• The AD790 offers the lowest power dissipation among comparators in its speed class
• The AD790 output swing is symmetric between V_LOGIC and ground, providing predictable output behavior across a wide range of input and output conditions

• Zero-crossing detector
• Overvoltage detector
• Pulse width modulator
• Precision rectifier
• Discrete ADC
• Delta-Sigma modulator ADC