AS348W5-7

Overview

The AS348W5-7 is a single-channel, low noise, low power CMOS operational amplifier manufactured by Diodes Incorporated. It features rail-to-rail input and output capabilities with an extended common-mode voltage range of 300mV beyond the supply rail. The device operates from a single supply of 1.6V to 5.5V or dual supplies of ±0.8V to ±2.5V. Key electrical parameters include a gain bandwidth product of 1MHz, a typical supply current of 70μA per channel, an input offset voltage of 0.5mV (max 2.5mV), and an ultra-low input bias current of 1pA. It is unity-gain stable up to 100pF capacitive loads.

Feature Summary

• Rail-to-rail input and output operation with extended common-mode voltage capability
• Ultra-low input bias current suitable for precision applications
• Low noise density and low input offset voltage drift
• Unity-gain stability with significant capacitive loading

Applications

• Active filters
• Sensor interfaces
• Photodiode amplification
• Smoke alarms and CO detectors
• Medical instrumentation

Procurement Notes

Verify the specific ordering suffix W5 corresponds to the SOT25 package and tape-and-reel quantity as documented in the manufacturer's ordering information. Confirm RoHS compliance and lead-free status requirements against project specifications. Ensure the selected component matches the exact datasheet revision DS45094 Rev. 1-2 for accurate parameter validation.

Selection Notes

Select this component for designs requiring high precision with minimal power consumption. The low input bias current makes it suitable for high-impedance sensor circuits. Verify that the required gain bandwidth and slew rate meet the signal processing needs. Consider the SOT25 package constraints for PCB layout and thermal management within the specified operating temperature range.

Part Context

This part belongs to the AS348/AS2348 family of low noise, low power, 1MHz RRIO single/dual CMOS operational amplifiers. The AS348 variant specifically denotes the single-channel configuration available in the SOT25 package. This family is designed for battery-powered and portable equipment where efficiency and signal integrity are critical.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the same series. Cross-reference with other manufacturers' single-channel op-amps featuring similar 1MHz bandwidth and rail-to-rail I/O specifications if sourcing constraints exist.

FAQ

What is the maximum capacitive load the AS348W5-7 can drive while remaining stable?

The device is unity-gain stable for capacitive loads up to 100 pF.

Does the AS348W5-7 support dual-supply operation?

Yes, it is fully specified to operate from dual supplies ranging from ±0.8V to ±2.5V.

What is the typical input bias current for this amplifier?

The typical input bias current is 1 pA at room temperature.