LT1124/LT1125
Dual/Quad Low Noise,
High Speed Precision Op Amps
Description
Features
100% Tested Low Voltage Noise:
2.7nV/√Hz Typ
4.2nV/√Hz Max
n Slew Rate: 4.5V/µs Typ
n Gain-Bandwidth Product: 12.5MHz Typ
n Offset Voltage,
Prime Grade: 70µV Max
Low Grade: 100µV Max
n High Voltage Gain: 5 Million Min
n Supply Current Per Amplifier: 2.75mA Max
n Common Mode Rejection: 112dB Min
n Power Supply Rejection: 116dB Min
n Available in 8-Pin SO Package
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 IB and IOS than the OP-27; lower VOS and noise
than the OP-270/OP-470.
n
In the design, processing and testing of the device, particular 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.
Applications
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n
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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.
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
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.
Typical Application
Instrumentation Amplifier with Shield Driver
2
+
1
1/4
LT1125
–
+
–
15V
5
8
1/4
LT1125
+
–
10
9
RG
100Ω
RG
100Ω
GUARD
13
12
–
+
1/4
LT1125
14
RF
3.4k
Input Offset Voltage Distribution
(All Packages, LT1124 and LT1125)
30k
RF
3.4k
GUARD
INPUT
1k
6
30
4
+
1/4
LT1125
–
11
7
OUTPUT
30k
–15V
GAIN = 30 (1 + RF/RG) ≈ 1000
POWER BW = 170kHz
SMALL-SIGNAL BW = 400kHz
NOISE = 3.8µV/ √Hz AT OUTPUT
VOS = 35µV
1k
PERCENT OF UNITS
3
VS = ±15V
TA = 25°C
758 DUALS
200 QUADS
2316 UNITS
TESTED
20
10
0
–100
60
–60
–20
20
INPUT OFFSET VOLTAGE (µV)
100
1124/25 TA02
1124/25 TA01
11245ff
For more information www.linear.com/LT1124
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