LT685 High Speed Comparator

The LT™685 is an ultrafast comparator with differential inputs and complementary outputs fully compatible with ECL logic levels. The output current capability is adequate for driving transmission lines terminated in 50 Ohm. The low input offset and high resolution make this comparator ideally suited for analog-to-digital signal processing applications.

A latch function is provided to allow the comparator to be used in a sample-hold mode. When the latch enable input is ECL high, the comparator functions normally. When the latch enable is driven low, the comparator outputs are locked in their existing logical states. If the latch function is not used, the latch enable must be connected to ground or ECL high.

The device is pin-compatible with the Am685. Hysteresis has been added to improve switching time with slow input signals as well as to minimize oscillation. A single resistor between the hysteresis pin and V� adds input hysteresis voltage as more current is drawn. If hysteresis is not required, the pin can be left unconnected

产品特点 Features

Ultra Fast (5.5ns typ)
Complementary ECL Output
50 ohms Line Driving Capability
Low Offset Voltage
Output Latch Capability
External Hysteresis Control
Pin Compatible with Am685

参数

应用

High Speed A to D Converters
High Speed Sampling Circuits
Oscillators

典型应用图

LT685 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT685CN	PDIP	16	C	$5.25	$4.30
LT685CN#PBF	PDIP	16	C	$5.25	$4.30

LT685 数据手册及相关资料下载

数据手册(英文) : LT685 - High Speed Comparator.PDF
可靠性数据 : R170 Reliability Data .PDF