LT1124/LT1125
Dual/Quad Low Noise,
High Speed Precision Op Amps
FeaTures
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 and I than the OP-27; lower V and noise
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100% Tested Low Voltage Noise:
2.7nV/√Hz Typ
4.2nV/√Hz Max
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Slew Rate: 4.5V/µs Typ
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Gain-Bandwidth Product: 12.5MHz Typ
Offset Voltage,
B
OS
OS
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than the OP-270/OP-470.
Prime Grade: 70µV Max
Low Grade: 100µV Max
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.
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High Voltage Gain: 5 Million Min
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Supply Current Per Amplifier: 2.75mA Max
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Common Mode Rejection: 112dB Min
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Power Supply Rejection: 116dB Min
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Available in 8-Pin SO Package
applicaTions
Power consumption of the LT1124 is one-half of two
OP-27s. Low power and high performance in an 8-pin
SO package make the LT1124 a first choice for surface
mounted systems and where board space is restricted.
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Two and Three Op Amp Instrumentation Amplifiers
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Low Noise Signal Processing
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Active Filters
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Microvolt Accuracy Threshold Detection
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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Strain Gauge Amplifiers
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Direct Coupled Audio Gain Stages
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Tape Head Preamplifiers
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Infrared Detectors
Typical applicaTion
Instrumentation Amplifier with Shield Driver
Input Offset Voltage Distribution
3
+
1k
30k
(All Packages, LT1124 and LT1125)
1
1/4
LT1125
–
2
R
F
758 DUALS
200 QUADS
2316 UNITS
TESTED
V
=
15V
S
A
15V
4
3.4k
T
= 25°C
30
20
10
0
5
6
GUARD
+
–
R
G
7
1/4
LT1125
100Ω
OUTPUT
30k
10
+
+
–
11
8
1/4
LT1125
R
G
INPUT
100Ω
9
–15V
–
GUARD
GAIN = 30 (1 + R /R ) ≈ 1000
F
G
POWER BW = 170kHz
SMALL-SIGNAL BW = 400kHz
R
F
13
12
NOISE = 3.8µV/√Hz AT OUTPUT
= 35µV
–
+
3.4k
V
OS
–100
–60
–20
20
60
100
14
1/4
LT1125
INPUT OFFSET VOLTAGE (µV)
1k
1124/25 TA02
1124/25 TA01
11245ff
1
For more information www.linear.com/LT1124