6

LT1126/LT1127

11267fa

LT1126AM/AC

LT1126M/C

LT1127AM/AC

LT1127M/C

PARAMETER

50% YIELD

98% YIELD

50% YIELD

98% YIELD

UNITS

LT1126

20

110

30

130

µV

LT1127

30

150

50

180

µV

Temperature Coefficient Match

0.35

1.0

0.5

1.5

µV/°C

618

725

nA

722

830

nA

CMRR Match

126

115

123

112

dB

PSRR Match

127

118

127

114

dB

APPLICATIO S I FOR ATIO

FREQUENCY (Hz)

3k

10k

20k

1126-7 G09

f (IM) = 1kHz

MEASUREMENT BANDWITH

= 10Hz TO 80kHz

LT1126

0.010

0.1

0.001

0.0001

FREQUENCY (Hz)

0.010

0.1

20

1k

10k

20k

1126-7 G08

100

0.001

0.0001

MEASUREMENT BANDWITH

= 10Hz TO 80kHz

FREQUENCY (Hz)

0.010

0.1

20

1k

10k

20k

1126-7 G07

100

0.001

0.0001

MEASUREMENT BANDWITH

= 10Hz TO 80kHz

Total Harmonic Distortion

Total Harmonic Distortion

and Noise vs Frequency for

and Noise vs Frequency for

Intermodulation Distortion

Inverting Gain

Non-Inverting Gain

(CCIF Method)* vs Frequency

CC

HARA TERISTICS

A

TYPICALPERFOR

CE

*See LT1115 data sheet for definition of CCIF testing

Matching Specifications

In many applications the performance of a system de-

pends on the matching between two op amps, rather than

the individual characteristics of the two devices. The three

op amp instrumentation amplifier configuration shown in

this data sheet is an example. Matching characteristics are

not 100% tested on the LT1126/LT1127.

Expected Match

Some specifications are guaranteed by definition. For

example, 70

µV maximum offset voltage implies that mis-

match cannot be more than 140

µV. 112dB (= 2.5µV/V)

CMRR means that worst case CMRR match is 106dB

(5

µV/V). However, the following table can be used to

estimate the expected matching performance between the

two sides of the LT1126, and between amplifiers A and D,

and between amplifiers B and C of the LT1127.