GENERAL DESCRIPTION

The AD8469 is a fast comparator fabricated on XFCB2, an Analog Devices, Inc., proprietary process. This comparator is exceptionally versatile and easy to use. Features include an input range from VEE − 0.2 V to VCC + 0.2 V, low noise, TTL- and CMOS-compatible output drivers, adjustable hysteresis control, and a shutdown input. The device offers a 40 ns propagation delay driving a 15 pF load with 10 mV overdrive on 500 µA typical supply current.

A flexible power supply scheme allows the device to operate from a single +2.5 V positive supply with a −0.2 V to +2.7 V input signal range up to a +5.5 V positive supply with a −0.2 V to +5.7 V input signal range.

The TTL-/CMOS-compatible output stage is designed to drive up to 15 pF with full rated timing specifications and to degrade in a graceful and linear fashion as additional capacitance is added. The input stage of the comparator offers robust protection against large input overdrive, and the outputs do not phase reverse when the valid input signal range is exceeded.

The AD8469 is available in an 8-lead MSOP package and features a shutdown pin and hysteresis control. It is fully specified over an operating temperature range of −40°C to +125°C.

FEATURES

Qualified for automotive applications

Fully specified rail-to-rail at VCC = 2.5 V to 5.5 V

Input common-mode voltage: VEE − 0.2 V to VCC + 0.2 V

Low glitch TTL-/CMOS-compatible output stage

40 ns propagation delay

Low power: 1.4 mW at 2.5 V

Shutdown pin

Programmable hysteresis

Power supply rejection better than −50 dB

−40°C to +125°C operation

APPLICATIONS

High speed instrumentation

Clock and data signal restoration

Logic level shifting or translation

High speed line receivers

Threshold detection

Peak and zero-crossing detectors

High speed trigger circuitry

Pulse-width modulators

Current/voltage controlled oscillators