10 MHz, 14.5 nV/√Hz, Rail-to-Rail I/O,

Zero Input Crossover Distortion Amplifier

Data Sheet

ADA4500-2

Rev. A

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FEATURES

Power supply rejection ratio (PSRR): 98 dB minimum

Common-mode rejection ratio (CMRR): 95 dB minimum

Offset voltage: 120 µV maximum

Single-supply operation: 2.7 V to 5.5 V

Dual-supply operation: ±1.35 V to ±2.75 V

Wide bandwidth: 10 MHz

Rail-to-rail input and output

Low noise

2 µV p-p from 0.1 Hz to 10 Hz

14.5 nV/√Hz at 1 kHz

Very low input bias current: 2 pA maximum

APPLICATIONS

Pressure and position sensors

Remote security

Medical monitors

Process controls

Hazard detectors

Photodiode applications

PIN CONFIGURATION

OUT A 1

–IN A 2

+IN A 3

V– 4

V+

8

OUT B

7

–IN B

6

+IN B

5

ADA4500-2

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead MSOP Pin Configuration

For more information on the pin connections, see the Pin

Configurations and Function Descriptions section

100

–100

–80

–60

–40

–20

0

20

40

60

80

0

5

4

3

2

1

ADA4500-2

Figure 2. The ADA4500-2 Eliminates Crossover Distortion

Across its Full Supply Range

GENERAL DESCRIPTION

The ADA4500-2 is a dual 10 MHz, 14.5 nV/√Hz, low power

amplifier featuring rail-to-rail input and output swings while

operating from a 2.7 V to 5.5 V single power supply. Compatible

with industry-standard nominal voltages of +3.0 V, +3.3 V,

+5.0 V, and ±2.5 V.

Employing a novel zero-crossover distortion circuit topology, this

amplifier offers high linearity over the full, rail-to-rail input

common-mode range, with excellent power supply rejection ratio

(PSRR) and common-mode rejection ratio (CMRR) performance

without the crossover distortion seen with the traditional

complementary rail-to-rail input stage. The resulting op amp

also has excellent precision, wide bandwidth, and very low

bias current.

This combination of features makes the ADA4500-2 an ideal choice

for precision sensor applications because it minimizes errors due to

power supply variation and maintains high CMRR over the full

input voltage range. The ADA4500-2 is also an excellent amplifier

for driving analog-to-digital converters (ADCs) because the output

does not distort with the common-mode voltage, which enables

the ADC to use its full input voltage range, maximizing the

dynamic range of the conversion subsystem.

Many applications such as sensors, handheld instrumentation,

precision signal conditioning, and patient monitors can benefit

from the features of the ADA4500-2.

The ADA4500-2 is specified for the extended industrial temperature

range (−40°C to +125°C) and available in the standard 8-lead

MSOP and 8-lead LFCSP packages.