ADA4505-1 Datasheet

• PSRR: 100 dB minimum
• CMRR: 105 dB typical
• Very low supply current: 10 μA per amplifier maximum
• 1.8 V to 5 V single-supply or ±0.9 V to ±2.5 V dual-supply operation
• Rail-to-rail input and output
• 3 mV offset voltage maximum
• Very low input bias current: 0.5 pA typical

• Pressure and position sensors
• Remote security
• Medical monitors
• Battery-powered consumer equipment
• Hazard detectors

The ADA4505-1 is single micropower amplifiers featuring rail-to-rail input and output swings while operating from a single 1.8 V to 5 V power supply or from dual ±0.9 V to ±2.5 V power supplies.

Employing a new circuit technology, these low cost amplifiers offer zero input crossover distortion (excellent PSRR and CMRR performance) and very low bias current, while operating with a supply current of less than 10 μA per amplifier.

This combination of features makes the ADA4505-1 amplifiers ideal choices for battery-powered applications because they minimize errors due to power supply voltage variations over the lifetime of the battery and maintain high CMRR even for a rail-to-rail op amp.

Remote battery-powered sensors, handheld instrumentation and consumer equipment, hazard detectors (for example, smoke, fire, and gas), and patient monitors can benefit from the features of the ADA4505-1 amplifiers.

The ADA4505-1 is specified for both the industrial temperature range (−40°C to +85°C) and the extended industrial temperature range (−40°C to +125°C). The ADA4505-1 single amplifier is available in a tiny 5-lead SOT-23.

The ADA4505-1 is a member of a growing series of zero crossover op amps offered by Analog Devices, Inc., including the AD8506/AD8508, which also operate from a single 1.8 V to 5 V power supply or from dual ±0.9 V to ±2.5 V power supplies.