AD8505 Datasheet

20 µA Maximum, RRIO, Zero Input Crossover Distortion Single Op Amp

Part No.:
AD8505
Manufacturer:
Analog Devices, Inc.
Page:
21 Pages
Size:
699 KB
Views:
0
Update Time:
2026-03-19 10:12:08

AD8505 DataSheet Applicable Part

Part No. In Stock Price Packaging SPQ Marking MSL Pins Temp Range Package Description
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

AD8505 DataSheet PDF

AD8505 Features

  • PSRR: 100 dB minimum
  • CMRR: 105 dB typical
  • Very low supply current: 20 μA per amplifier maximum
  • 1.8 V to 5 V single supply or ±0.9 V to ±2.5 V dual supply
  • Rail-to-rail input/output
  • Low noise: 45 nV/√Hz at 1 kHz
  • 2.5 mV offset voltage maximum
  • Very low input bias current: 1 pA typical

AD8505 Applications

  • Pressure and position sensors
  • Remote security
  • Bio sensors
  • IR thermometers
  • Battery-powered consumer equipment
  • Hazard detectors

AD8505 Description

The AD8505 is single micro-power amplifiers featuring rail-to-rail input/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. Using a new circuit technology, these amplifiers offer zero input crossover distortion (excellent PSRR and CMRR performance) and low bias current while operating with a supply current of less than 20 μA per amplifier. This amplifier family offers the lowest noise in its power class.

This combination of features makes the AD8505 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 input op amp. Remote battery-powered sensors, handheld instrumentation, consumer equipment, hazard detection (for example, smoke, fire, and gas), and patient monitors can benefit from the features of the AD8505 amplifiers.

The AD8505 is specified for both the industrial temperature range of −40°C to +85°C and the extended industrial temperature range of −40°C to +125°C. The AD8505 single ampli-fier is available in a tiny 5-lead SOT-23 package. The AD8505 is members of a growing series of zero crossover distortion op amps offered by Analog Devices, Inc., including the ADA4505-1, that operate from a single 1.8 V to 5 V supply or from dual ±0.9 V to ±2.5 V power supplies.

AD8505 Datasheet FAQs