9

LTC2054/LTC2055

sn20545 20545fas

cause the second form of clock feedthrough described

above, when averaged, dominate the DC input bias current

of the op amp below 70°C.

At temperatures above 70°C, the leakage of the ESD

protection diodes on the inputs increases the input bias

currents of both inputs in the positive direction, while the

current caused by the charge injection stays relatively

constant. At elevated temperatures (above 70°C) the

leakage current begins to dominate and both the negative

and positive pins’ input bias currents are in the positive

direction (into the pins).

Extended Common Mode Range

The LTC2054/LTC2055 input stage is designed to allow

nearly rail-to-rail input common mode signals. In addition,

signals that extend beyond the allowed input common

mode range do not cause output phase inversion.

APPLICATIO S I FOR ATIO

–

+

100k

–2.5V

2.5V

1k

OUTPUT

SINE WAVE

LTC2054/55

2054 TA09

500µs/DIV

2054 G19

0V

0V

Voltage Follower with Input Exceeding

the Common Mode Range

LTC2054/LTC2055

Extended Common Mode Range

–

+

5V

0.1µF

499k

0.1µF

499k

5

1

2

3

4

1µF

5V

20545 TA02

10kΩ

BRIDGE

LTC2054HV

–5V

LT1790-2.5

TYPICAL APPLICATIO S

Simple Differential Bridge Amplifier