LT1126C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1126C' PDF : 12 Pages View PDF
LT1126/LT1127
TYPICAL PERFOR A CE CHARACTERISTICS
Total Harmonic Distortion
and Noise vs Frequency for
Inverting Gain
0.1
0.010
ZL = 2k/15pF
VO = 20Vp-p
AV = –10, –100
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
0.001
AV = –100
AV = –10
Total Harmonic Distortion
and Noise vs Frequency for
Non-Inverting Gain
0.1
0.010
ZL = 2k/15pF
VO = 20Vp-p
AV = +10, +100
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
AV = +100
0.001
AV = +10
0.0001
20
100
1k
FREQUENCY (Hz)
10k 20k
1126-7 G07
0.0001
20
100
1k
FREQUENCY (Hz)
10k 20k
1126-7 G08
Intermodulation Distortion
(CCIF Method)* vs Frequency
0.1
0.010
ZL = 2k/15pF
f (IM) = 1kHz
fO = 13.5kHz
VO = 20Vp-p
AV = –10
MEASUREMENT BANDWITH
= 10Hz TO 80kHz
0.001
0.0001
3k
LT1126
10k
FREQUENCY (Hz)
20k
1126-7 G09
*See LT1115 data sheet for definition of CCIF testing
APPLICATIO S I FOR ATIO
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.
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.
Expected Match
PARAMETER
VOS Match, ∆VOS LT1126
LT1127
Temperature Coefficient Match
Average Non-Inverting IB
Match of Non-Inverting IB
CMRR Match
PSRR Match
LT1126AM/AC
LT1127AM/AC
50% YIELD
98% YIELD
20
110
30
150
0.35
1.0
6
18
7
22
126
115
127
118
LT1126M/C
LT1127M/C
50% YIELD
98% YIELD
30
130
50
180
0.5
1.5
7
25
8
30
123
112
127
114
UNITS
µV
µV
µV/°C
nA
nA
dB
dB
11267fa
6
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