Datasheet
6
LT1126/LT1127
11267fa
LT1126AM/AC LT1126M/C
LT1127AM/AC LT1127M/C
PARAMETER 50% YIELD 98% YIELD 50% YIELD 98% YIELD UNITS
V
OS
Match, ∆V
OS
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
Average Non-Inverting I
B
618725 nA
Match of Non-Inverting I
B
722830 nA
CMRR Match 126 115 123 112 dB
PSRR Match 127 118 127 114 dB
APPLICATIO S I FOR ATIO
WUU
U
FREQUENCY (Hz)
INTERMODULATION DISTORTION (IMD) (%)
3k 10k 20k
1126-7 G09
Z
L
= 2k/15pF
f (IM) = 1kHz
f
O
= 13.5kHz
V
O
= 20Vp-p
A
V
= –10
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
LT1126
0.010
0.1
0.001
0.0001
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION + NOISE (%)
0.010
0.1
20 1k 10k 20k
1126-7 G08
100
0.001
0.0001
Z
L
= 2k/15pF
V
O
= 20Vp-p
A
V
= +10, +100
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
A
V
= +10
A
V
= +100
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION + NOISE (%)
0.010
0.1
20 1k 10k 20k
1126-7 G07
100
0.001
0.0001
Z
L
= 2k/15pF
V
O
= 20Vp-p
A
V
= –10, –100
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
A
V
= –10
A
V
= –100
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
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
*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, 70µV maximum offset voltage implies that mis-
match cannot be more than 140µV. 112dB (= 2.5µV/V)
CMRR means that worst case CMRR match is 106dB
(5µV/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.