LT1125CSW Datasheet, PDF (1/18 Pages) Linear Dimensions Semiconductor – Dual/Quad Low Noise, High Speed Precision Op Amps

LT1124/LT1125
Dual/Quad Low Noise,
High Speed Precision Op Amps
FEATURES
DESCRIPTION
n _{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 Packages}
APPLICATIONS
n _{Two and Three Op Amp Instrumentation Amplifiers}
n _{Low Noise Signal Processing}
n _{Active Filters}
n _{Microvolt Accuracy Threshold Detection}
n _{Strain Gauge Amplifiers}
n _{Direct Coupled Audio Gain Stages}
n _{Tape Head Preamplifiers}
n _{Infrared Detectors}
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.
TYPICAL APPLICATION
Instrumentation Amplifier with Shield Driver
GUARD
+
INPUT _–
3₊
1/4
LT1125
2_–
1
1k
R_F
3.4k
R_G
10
100Ω
8
1/4
LT1125
9
R_G
100Ω
30k
15V
5₊
4
1/4
6
LT1125
– ₁₁
–15V
7
OUTPUT
30k
GUARD
GAIN = 30 (1 + R_F/R_G) ≈ 1000
POWER BW = 170kHz
13 _–
1/4
R_F
3.4k
14
SMALL-SIGNAL BW = 400kHz
NOISE = 3.8μV/√Hz AT OUTPUT
V_OS = 35μV
12
LT1125
+
1k
1124/25 TA01
Input Offset Voltage Distribution
(All Packages, LT1124 and LT1125)
V_S = ±15V
30 ^{TA = 25°C}
758 DUALS
200 QUADS
2316 UNITS
TESTED
20
10
0
–100
–60 –20 20
60 100
INPUT OFFSET VOLTAGE (μV)
1124/25 TA02
11245fe
1