LT1671

Features:

Low Power: 450µA
Fast: 60ns at 20mV Overdrive
            85ns at 5mV Overdrive
 Low Offset Voltage: 0.8mV
 Operates Off Single 5V or Dual ±5V Supplies
 Input Common Mode Extends to Negative Supply
 No Minimum Input Slew Rate Requirement
 Complementary TTL Outputs
Inputs Can Exceed Supplies without Phase Reversal
 Pin Compatible with LT1394, LT1016 and LT1116
 Output Latch Capability
Available in 8-Lead MSOP and SO Packages 


Application

High Speed A/D Converters
 Zero-Crossing Detectors
Current Sense for Switching Regulators
Extended Range V/F Coverters
 Fast Pulse Height/Width Discriminators
 High Speed Triggers
 Line Receivers
 High Speed Sampling Circuits


Pinout




Specifications

Total Supply Voltage (V⁺ to V) ...............................      12V
Positive Supply Voltage .............................................       7V
Negative Supply Voltage ..........................................     7V
Differential Input Voltage .......................................     ±12V
Input and Latch Current (Note 2) ........................     ±10mA
Output Current (Continuous)(Note 2) .................     ±20mA
Operating Temperature Range ................  40°C to 85°C
Specified Temperature Range (Note 3) ...  40°C to 85°C
Junction Temperature...........................................     150°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec.) .................   300°C


Description

The LT^® 1671 is a low power 60ns comparator with complementary outputs and latch. The input common mode range extends from 1.5V below the positive supply down to the negative supply rail. Like the LT1394, LT1016 and LT1116, this comparator has complementary outputs designed to interface directly to TTL or CMOS logic. The LT1671 may operate from either a single 5V supply or dual ±5V supplies. Low offset voltage specifications and high gain allow the LT1671 to be used in precision applications.

The LT1671 is designed for improved speed and stability for a wide range of operating conditions. The output stage provides active drive in both directions for maximum speed into TTL, CMOS or passive loads with minimal cross-conduction current. Unlike other fast comparators, the LT1671 remains stable even for slow transitions through the active region, which eliminates the need to specify a minimum input slew rate.

The LT1671 has an internal, TTL/CMOS compatible latch for retaining data at the outputs. The latch holds data as long as the LATCH pin is held high. Device parameters such as gain, offset and negative power supply current are not significantly affected by variations in negative supply voltage.