AD8631:  1.8 V, 5 MHz Rail-to-Rail Low Power Operational Amplifiers

The AD8631 brings precision and bandwidth to the SOT-23-5 package at single supply voltages as low as 1.8 V and low supply current. The small package makes it possible to place the AD8631 next to ...More

AD8631:  1.8 V, 5 MHz Rail-to-Rail Low Power Operational Amplifiers

Product Description

The AD8631 brings precision and bandwidth to the SOT-23-5 package at single supply voltages as low as 1.8 V and low supply current. The small package makes it possible to place the AD8631 next to sensors, reducing external noise pickup.

The AD8631 and AD8632 are rail-to-rail input and output bipolar amplifiers with a gain bandwidth of 4 MHz and typical voltage offset of 0.8 mV from a 1.8 V supply. The low supply current and the low supply voltage makes these parts ideal for battery-powered applications. The 3 V/µs slew rate makes the AD8631/AD8632 a good match for driving ASIC inputs, such as voice codecs.

The AD8631/AD8632 is specified over the extended industrial (–40.C to +125.C) temperature range. The AD8631 single is available in 5-lead SOT-23 surface-mount packages. The dual AD8632 is available in 8-lead SOIC and µSOIC packages.

Features

  • Single Supply Operation: 1.8 V to 6 V
  • Space-Saving SOT-23, µSOIC Packaging
  • Wide Bandwidth: 5 MHz @ 5 V, 4 MHz @ 1.8 V
  • Low Offset Voltage: 4 mV Max, 0.8 mV typ
  • Rail-to-Rail Input and Output Swing
  • 2 V/µs Slew Rate @ 1.8 V
  • Only 225 µA Supply Current @ 1.8 V

Diagrams

AD8631 Diagram
Pin Configuration Diagram for AD8631

Specifications

-3dB Bandwidth 5MHz
Slew Rate 3V/µs
Vos 800µV
Ib 250nA
Input Noise (nV/rtHz) 23nV/rtHz
Vcc-Vee Supply (V) 1.8 to 6
Iq per Amplifier (max) 450µA
# OpAmps per Pkg 1
Operating Temp Range -40 to +125
Packages SOT

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Part# Small Signal Bandwidth Slew Rate Vos Ib V Noise Density Amplifiers Per Package Widest Temp Range (°C)
OP184 4.25MHz 4V/µs 175µV 80nA 3.9nV/rtHz 1 -40 to +125
AD8665 4MHz 3.5V/µs 600µV 200fA 10nV/rtHz 1 -40 to +125
ADA4000-1 5MHz 20V/µs 200µV 5pA 16nV/rtHz 1 -40 to +125
AD8631 5MHz 3V/µs 800µV 250nA 23nV/rtHz 1 -40 to +125
AD8661 4MHz 3.5V/µs 30µV 300fA 12nV/rtHz 1 -40 to +125
AD8601 8.4MHz 6V/µs 500µV 200fA 18nV/rtHz 1 -40 to +125
AD8605 10MHz 5V/µs 20µV 200fA 6.5nV/rtHz 1 -40 to +125
AD8691 10MHz 5V/µs 400µV 200fA