Analog Devices' 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. This enables the ADC to use its full input voltage range, maximizing the dynamic range of the conversion subsystem.
- Rail-to-rail input and output
- PSRR: 98 dB minimum
- CMRR: 95 dB minimum
- VCM[(V–) –0.2 V] to [(V+) +0.2 V]
- 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
- Low noise
- 2 μV p-p from 0.1 Hz to 10 Hz
- 14.5 nV/√Hz at 1 kHz
- Low input bias current: 2 pA maximum
- Pressure and position sensors
- Photodiode application
- Medical monitors
- Process control
- Hazard detectors
- Remote security