36 V, Low Noise, Zero Drift Op Amp

Data Sheet

ADA4523-1

Rev. 0

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FEATURES

Supply voltage range: 4.5 V to 36 V

Offset voltage: ±4 µV maximum at 5 V

Offset voltage drift: 0.01 µV/°C maximum at 5 V

Input noise

Voltage: 88 nV p-p from 0.1 Hz to 10 Hz typical

Spectral density voltage: 4.2 nV/√Hz typical at 1 kHz

Rail-to-rail output

Unity-gain stable

GBP: 5 MHz typical

Slew rate: 1.8 V/µs typical falling

PSRR: 168 dB typical at VS = 4.5 V to 36 V

Open-loop voltage gain: 160 dB typical at VOUT = −14.75 V to

+14.75 V, RL = 10 kΩ, VS = 30 V

CMRR: 160 dB typical at VCM = −15.1 V to +13.5 V,VS = 30V

Integrated EMI filters

Shutdown mode

Ground sense

Available in 8-lead SOIC, 8-lead MSOP, and 8-lead LFCSP

APPLICATIONS

High resolution data acquisition

Reference buffering

Test and measurement

Electronic scales

Thermocouple amplifiers

Strain gages

Low-side current sense

GENERAL DESCRIPTION

The ADA4523-1 is a high voltage, low noise, zero drift op amp

that offers precision dc performance over a wide supply range of

4.5 V to 36 V. Offset voltage and 1/f noise are suppressed,

allowing this op amp to achieve a maximum offset voltage of

±4 µV and a 0.1 Hz to 10 Hz input noise voltage of 88 nV p-p

typical. The self calibrating circuitry of the ADA4523-1 results in

low offset voltage drift with temperature (0.01 µV/°C maximum)

and zero drift over time. Additionally, the ADA4523-1 uses

on-chip filtering to achieve high immunity to electromagnetic

interference (EMI).

Wide supply range, combined with low noise, low offset, 168 dB

power supply rejection ratio (PSRR), and 160 dB common-mode

rejection ratio (CMRR), make the ADA4523-1 well suited for high

dynamic range test, measurement, and instrumentation systems.

TYPICAL APPLICATION DIAGRAM

R3

5.62kΩ

R2

750Ω

R1

1kΩ

R4

2Ω

C1

4.7µF

C2

47nF

C3

47µF

C4

0.1µF

C5

0.1µF

ADA4523-1

LT6202

VOUT

8V TO 12.6V

8V TO 36V

+

–

+

–

C8

20µF

(FILM)

R5

10kΩ

C7

2.2µF

C6

0.1µF

LTC6655-5

VIN

VOUT_F

SHDN

8V TO 13.2V

VOUT_S

Figure 1. Precision Filtering Voltage Reference Buffer

The ADA4523-1 provides a rail-to-rail output swing and an

input common-mode range that includes the V− rail (V− − 0.1 V

to V+ − 1.5 V).

AD8628

LTC2057

ADA4522-1

ADA4523-1

FREQUENCY (Hz)

0.01

0.1

1

10

100

1k

10k

100k

1

10

100

Figure 2. Input-Referred Voltage Noise Density vs. Frequency, Zero Drift

Amplifier Family Comparison

COMPANION PRODUCTS

Voltage References: LTC6655 and ADR4525

Low Noise High Speed Amplifier: LT6202

ADC: LTC2500-32

Low Noise, Low Dropout Regulators: LT3093 and LT3042

Additional companion products for the ADA4523-1 can be

found in the Related Products section.