LTC1052/LTC7652

1

1052fa

The LTC

amps manufactured using Linear Technology’s enhanced

LTCMOS

constantly corrects offset voltage errors. Both initial offset

and changes in the offset due to time, temperature and

common mode voltage are corrected. This, coupled with

picoampere input currents, gives these amplifiers

unmatched performance.

Low frequency (1/f) noise is also improved by the

chopping technique. Instead of increasing continuously

at a 3dB/octave rate, the internal chopping causes noise to

decrease at low frequencies.

The chopper circuitry is entirely internal and completely

transparent to the user. Only two external capacitors

are required to alternately sample-and-hold the offset

correction voltage and the amplified input signal. Control

circuitry is brought out on the 14-pin and 16-pin versions

to allow the sampling of the LTC1052 to be synchronized

with an external frequency source.

Zero-Drift

Operational Amplifier

, LTC and LT are registered trademarks of Linear Technology Corporation.

FEATURES

DESCRIPTIO

■

Thermocouple Amplifiers

■

Strain Gauge Amplifiers

■

Low Level Signal Processing

■

Medical Instrumentation

■

Guaranteed Max Offset: 5µV

■

Guaranteed Max Offset Drift: 0.05µV/°C

■

Typ Offset Drift: 0.01µV/°C

■

Excellent Long Term Stability: 100nV/√Month

■

Guaranteed Max Input Bias Current: 30pA

■

Over Operating Temperature Range:

Guaranteed Min Gain: 120dB

Guaranteed Min CMRR: 120dB

Guaranteed Min PSRR: 120dB

■

Single Supply Operation: 4.75V to 16V

(Input Voltage Range Extends to Ground)

■

Noise Degradation

Ultralow Noise, Low Drift Amplifier

Noise Spectrum

APPLICATIO S

FREQUENCY (Hz)

0

160

140

120

100

80

60

40

20

0

400

100

200

300

500

LTC1052/7652 • TA02

LTCMOS is a trademark of Linear Technology Corporation.

Teflon is a trademark of DuPont.

3

2

3

4

6

7

4

100

Ω

INPUT

5V

–5V

5V

+

–

LT

LTC1052

+

–

OUTPUT

2

8

1

0.1

µF

0.1

µF

0.1

µF

5V

100k

3K

68k

7

5V

1

–5V

100k

6

8

1.5k

VOS = 3µV

VOS∆T = 50nV/°C

NOISE = 0.06

µV

LTC1052/7652 • TA01

TYPICAL APPLICATIO