LTC1050_09 Datasheet, PDF (1/16 Pages) Linear Technology – Precision Zero-Drift Operational Amplifier with Internal Capacitors

FEATURES
■ _{No External Components Required}
■ _{Noise Tested and Guaranteed}
■ _{Low Aliasing Errors}
■ _{Maximum Offset Voltage: 5µV}
■ _{Maximum Offset Voltage Drift: 0.05µV/°C}
■ _{Low Noise: 1.6µVP-P (0.1Hz to 10Hz)}
■ _{Minimum Voltage Gain: 130dB}
■ _{Minimum PSRR: 125dB}
■ _{Minimum CMRR: 120dB}
■ _{Low Supply Current: 1mA}
■ _{Single Supply Operation: 4.75V to 16V}
■ _{Input Common Mode Range Includes Ground}
■ _{Output Swings to Ground}
■ _{Typical Overload Recovery Time: 3ms}
U
APPLICATIO S
■ _{Thermocouple Amplifiers}
■ _{Electronic Scales}
■ _{Medical Instrumentation}
■ _{Strain Gauge Amplifiers}
■ _{High Resolution Data Acquisition}
■ _{DC Accurate RC Active Filters}
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC1050
Precision Zero-Drift
Operational Amplifier
with Internal Capacitors
DESCRIPTIO
The LTC^®1050 is a high performance, low cost zero-drift
operational amplifier. The unique achievement of the
LTC1050 is that it integrates on-chip the two sample-and-
hold capacitors usually required externally by other chop-
per amplifiers. Further, the LTC1050 offers better com-
bined overall DC and AC performance than is available
from other chopper stabilized amplifiers with or without
internal sample-and-hold capacitors.
The LTC1050 has an offset voltage of 0.5µV, drift of
0.01µV/°C, DC to 10Hz, input noise voltage of 1.6µV_P-P
and a typical voltage gain of 160dB. The slew rate of 4V/µs
and a gain bandwidth product of 2.5MHz are achieved with
only 1mA of supply current.
Overload recovery times from positive and negative satu-
ration conditions are 1.5ms and 3ms respectively, which
represents an improvement of about 100 times over chop-
per amplifiers using external capacitors. Pin 5 is an optional
external clock input, useful for synchronization purposes.
The LTC1050 is available in standard 8-pin metal can,
plastic and ceramic dual-in-line packages as well as an
SO-8 package. The LTC1050 can be an improved plug-in
replacement for most standard op amps.
TYPICAL APPLICATIO
High Performance, Low Cost Instrumentation Amplifier
5V
4
1/2 LTC1043
7
8
DIFFERENTIAL
INPUT
11
C_S
1µF
12
5V
3₊
7
LTC1050
6
2_–
4
C_H
1µF
– 5V
1µF
V_OUT
13
14
16
17
0.01µF
– 5V
R1
R2
1050 TA01
CMRR > 120dB AT DC
CMRR > 120dB AT 60Hz
DUAL SUPPLY OR SINGLE 5V
GAIN = 1 + R2/R1
V_OS = 5µV
COMMON MODE INPUT VOLTAGE EQUALS THE SUPPLIES
160
140
120
100
80
60
40
20
0
10
Noise Spectrum
100
1k
10k
FREQUENCY (Hz)
100k
1050 TA02
1050fb
1