FEATURES
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LT1124/LT1125
Dual/Quad Low Noise,
High Speed Precision Op Amps
DESCRIPTION
The LT
®
1124 dual and LT1125 quad are high performance
op amps that offer higher gain, slew rate and bandwidth
than the industry standard OP-27 and competing OP-270/
OP-470 op amps. In addition, the LT1124/LT1125 have
lower I
B
and I
OS
than the OP-27; lower V
OS
and noise
than the OP-270/OP-470.
In the design, processing and testing of the device, par-
ticular attention has been paid to the optimization of the
entire distribution of several key parameters. Slew rate,
gain bandwidth and 1kHz noise are 100% tested for each
individual amplifier. Consequently, the specifications
of even the lowest cost grades (the LT1124C and the
LT1125C) have been spectacularly improved compared
to equivalent grades of competing amplifiers.
Power consumption of the LT1124 is one-half of two
OP-27s. Low power and high performance in both rotated
and standard 8-pin SO packages make the LT1124 a first
choice for surface mounted systems and where board
space is restricted.
For a decompensated version of these devices, with three
times higher slew rate and bandwidth, please see the
LT1126/LT1127 data sheet.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 4775884, 4837496.
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100% Tested Low Voltage Noise:
2.7nV/√Hz Typ
4.2nV/√Hz Max
Slew Rate: 4.5V/μs Typ
Gain-Bandwidth Product: 12.5MHz Typ
Offset Voltage,
Prime Grade: 70μV Max
Low Grade: 100μV Max
High Voltage Gain: 5 Million Min
Supply Current Per Amplifier: 2.75mA Max
Common Mode Rejection: 112dB Min
Power Supply Rejection: 116dB Min
Available in 8-Pin SO Packages
APPLICATIONS
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Two and Three Op Amp Instrumentation Amplifiers
Low Noise Signal Processing
Active Filters
Microvolt Accuracy Threshold Detection
Strain Gauge Amplifiers
Direct Coupled Audio Gain Stages
Tape Head Preamplifiers
Infrared Detectors
TYPICAL APPLICATION
Instrumentation Amplifier with Shield Driver
3
+
1/4
LT1125
1
1k
R
F
3.4k
5
R
G
100Ω
6
R
G
100Ω
30k
Input Offset Voltage Distribution
(All Packages, LT1124 and LT1125)
30
V
S
= ±15V
T
A
= 25°C
758 DUALS
200 QUADS
2316 UNITS
TESTED
2
–
15V
GUARD
+
–
4
1/4
LT1125
11
–15V
OUTPUT
30k
INPUT
+
–
GUARD
+
8
1/4
LT1125
10
PERCENT OF UNITS
7
20
–
9
10
13
–
1/4
LT1125
14
R
F
3.4k
1k
GAIN = 30 (1 + R
F
/R
G
) ≈ 1000
POWER BW = 170kHz
SMALL-SIGNAL BW = 400kHz
NOISE = 3.8μV/ √
Hz
AT OUTPUT
V
OS
= 35μV
0
–100
12
–60
–20
60
20
INPUT OFFSET VOLTAGE (μV)
100
1124/25 TA02
+
1124/25 TA01
11245fe
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LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
