1

LT1671

60ns, Low Power,

Single Supply, Ground-Sensing

Comparator

OVERDRIVE (mV)

0

140

120

100

80

60

40

20

10

20

30

40

1671 TA02

50

Propagation Delay vs Overdrive

1MHz Crystal Oscillator

1671 TA01

–

+

LT1671

5V

OUTPUT

0.068

µF

1671 TA01

2k

2k

2k

1MHz CRYSTAL

(AT-CUT)

, LTC and LT are registered trademarks of Linear Technology Corporation.

The LT

mentary 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.

s

Low Power: 450

s

Fast: 60ns at 20mV Overdrive

85ns at 5mV Overdrive

s

Low Offset Voltage: 0.8mV

s

Operates Off Single 5V or Dual

±5V Supplies

s

Input Common Mode Extends to Negative Supply

s

No Minimum Input Slew Rate Requirement

s

Complementary TTL Outputs

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Inputs Can Exceed Supplies without Phase Reversal

s

Pin Compatible with LT1394, LT1016 and LT1116

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Output Latch Capability

s

Available in 8-Lead MSOP and SO Packages

s

High Speed A/D Converters

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Zero-Crossing Detectors

s

Current Sense for Switching Regulators

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Extended Range V/F Coverters

s

Fast Pulse Height/Width Discriminators

s

High Speed Triggers

s

Line Receivers

s

High Speed Sampling Circuits

DESCRIPTIO

FEATURES

APPLICATIO S

TYPICAL APPLICATIO