Datasheet ADA4500-2 (Analog Devices)

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10 MHz, 14.5 nV/√Hz, Rail-to-Rail I/O, Zero Input Crossover Distortion Amplifier Data Sheet ADA4500-2 FEATURES PIN CONFIGURATION Power supply rejection ratio (PSRR): 98 dB minimum OUT A 1 8 V+ Common-mode rejection ratio (CMRR): 95 dB minimum –IN A 2 7 OUT B ADA4500-2 Offset voltage: 120 μV maximum TOP VIEW +IN A 3 6 –IN B Single-supply operation: 2.7 V to 5.5 V (Not to Scale)
1 00 7-
Dual-supply operation: ±1.35 V to ±2.75 V V– 4 5 +IN B
61 10
Wide bandwidth: 10 MHz
Figure 1. 8-Lead MSOP Pin Configuration
Rail-to-rail input and output
For more information on the pin connections, see the Pin
Low noise
Configurations and Function Descriptions section
2 μV p-p from 0.1 Hz to 10 Hz 14.5 nV/√Hz at 1 kHz 100 ADA4500-2 Very low input bias current: 2 pA maximum 80 VSY = 5.0V APPLICATIONS 60 40 Pressure and position sensors Remote security 20 V) Medical monitors (µ 0 OS Process controls V –20 Hazard detectors –40 Photodiode applications –60 –80 –100
4
0 1 2 3 4 5
-00 7
VCM (V)
61 10 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 This combination of features makes the ADA4500-2 an ideal choice amplifier featuring rail-to-rail input and output swings while for precision sensor applications because it minimizes errors due to operating from a 2.7 V to 5.5 V single power supply. Compatible power supply variation and maintains high CMRR over the full with industry-standard nominal voltages of +3.0 V, +3.3 V, input voltage range. The ADA4500-2 is also an excellent amplifier +5.0 V, and ±2.5 V. for driving analog-to-digital converters (ADCs) because the output Employing a novel zero-crossover distortion circuit topology, this does not distort with the common-mode voltage, which enables amplifier offers high linearity over the full, rail-to-rail input the ADC to use its full input voltage range, maximizing the common-mode range, with excellent power supply rejection ratio dynamic range of the conversion subsystem. (PSRR) and common-mode rejection ratio (CMRR) performance Many applications such as sensors, handheld instrumentation, without the crossover distortion seen with the traditional precision signal conditioning, and patient monitors can benefit complementary rail-to-rail input stage. The resulting op amp from the features of the ADA4500-2. also has excellent precision, wide bandwidth, and very low The ADA4500-2 is specified for the extended industrial temperature bias current. range (−40°C to +125°C) and available in the standard 8-lead MSOP and 8-lead LFCSP packages.
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Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS VSY = 2.7 V ELECTRICAL CHARACTERISTICS VSY = 5.0 V ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION RAIL-TO-RAIL OUTPUT RAIL-TO-RAIL INPUT (RRI) ZERO CROSS-OVER DISTORTION OVERLOAD RECOVERY POWER-ON CURRENT PROFILE APPLICATIONS INFORMATION RESISTANCE AND CAPACITANCE SENSOR CIRCUIT ADAPTIVE SINGLE-ENDED-TO-DIFFERENTIAL SIGNAL CONVERTER The Challenge The Solution OUTLINE DIMENSIONS ORDERING GUIDE