Diodes Incorporated

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Low Noise, Low Power, 1MHz, RRIO Single / Dual CMOS Operational Amplifiers

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The AS348/AS2348 are single/dual channels RRIO amplifiers (rail-to-rail input and output), which provide not only maximum output-voltage swing capability but also an extended 300mV common-mode voltage beyond the supply rail. The devices are fully specified to operate from 1.6V to 5.5V single-supply, or ±0.8V and ±2.5V dual-supply applications.

The devices feature a good speed/power consumption ratio, offering 1MHz gain bandwidth while consuming 70μA per channel (typ). They are unity-gain stable for capacitive loads up to 100pF. The low noise density 27nV/√Hz, low input offset voltage 0.5mV and low input offset drift 2μV/°C make them ideal for applications that require precision. With the input bias current is 1pA at room temperature, it is well suitable for low-voltage, low-noise, and low-power applications.

The AS348/AS2348 offer industry-standard packages. The AS348 is available in the SOT25 package, and the AS2348 is offered in the MSOP-8 and SO-8 packages. Temperature is specified for operation: from -40°C to +125°C among all supply voltages. The wide temperature ranges and high ESD tolerance facilitate their use in harsh applications.


  • Single-Supply Voltage Range: 1.6V to 5.5V
  • Dual-Supply Voltage Range: ±0.8V to ±2.5V
  • Ultra-Low Input Bias Current: 1pA (typ)
  • Offset Voltage: 0.5mV (typ), 2.5mV (max)
  • Low Input Offset Drift: 2μV/°C (typ)
  • Rail-to-Rail Input

VCM: 300mV Beyond Supply Rail @ VCC = 3V or 5V

Rail-to-Rail Output Swing:

10kΩ Load: 4mV from Rail

1kΩ Load: 25mV from Rail

  • Supply Current: 70μA/Channel (typ)
  • Unity-Gain Stable up to 100pF Capacitive Load Gain Bandwidth: 1.0MHz
  • Slew Rate: 0.45V/μs @ VCC = 5.0V
  • Operation Ambient Temperature Range: -40°C to +125°C
  • ESD Protection JESD 22, 4000V HBM (A114)
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Active filters
  • Sensors interfaces
  • Photodiode amplification
  • Smoke alarms, CO detectors
  • Battery-powered applications
  • Portable equipment
  • Medical instrumentation
  • Pulse blood oximeters, glucose meters

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
Number of Channels 1
Minimum Supply Voltage (V) 1.6 V
Maximum Supply Voltage (V) 5.5 V
Supply Current @ 5V (per Op Amp) (mA) 0.07 mA
Input Offset Voltage typ (mV) 0.5 mV
Input Bias Current typ (nA) 0.001 nA
Minimum Input Common Mode Voltage (V) -0.2 V
Maximum Input Common Mode Voltage (V) 1.8 V
Output Current Source (mA) 7 mA
Output Current Sink (mA) 8 mA
Rail-Rail Yes
Operating Ambient Temperature Range (°C) -40 to 125 °C

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