ALD1721SAL

Overview

The ALD1721SAL is a monolithic CMOS micropower high slew rate operational amplifier designed for precision applications requiring extremely low input signal power. It features rail-to-rail input and output voltage ranges, allowing operation with supply overhead voltages as low as ±1V to ±5V or +5V single supply. The device offers a typical input offset voltage of 0.05 mV and input bias current of 0.01 pA at 25°C, resulting in an input signal power draw of 0.0005 fW. It provides a unity gain bandwidth of 700 kHz and a slew rate of 0.7 V/μs. Operating within a temperature range of 0°C to +70°C, it consumes a maximum supply current of 110 μA.

Feature Summary

• Extremely low input signal power requirements virtually eliminating source loading effects
• Rail-to-rail input and output voltage swing capabilities
• Internally compensated for unity gain stability without external components
• Robust design suitable for rugged and temperature-extreme environments

Applications

• Photodiode amplifiers
• Charge integrators
• Picoammeters
• High performance portable instruments
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin Small Outline Plastic Dip (SOIC) package with lead-free (RoHS) compliance. Confirm the operating temperature range matches the requirement for 0°C to +70°C. Ensure static control procedures are followed during handling due to ESD sensitivity. Cross-reference the manufacturer's ordering information to validate pin configuration compatibility with existing designs.

Selection Notes

Select this component when application demands include minimal input bias current distortion and high input impedance exceeding 10^14 Ω. It is appropriate for circuits powered by low voltage supplies such as single +5V or dual ±1V to ±5V rails. Consider its rail-to-rail characteristics for maximizing dynamic range in low-voltage analog signal chains. Verify that the 700 kHz bandwidth and 0.7 V/μs slew rate meet the signal frequency and transient response requirements.

Part Context

The ALD1721 series belongs to Advanced Linear Devices' portfolio of precision micropower CMOS operational amplifiers. It shares architectural similarities with industry-standard pin configurations like the μA741 and ICL7611 but utilizes advanced CMOS technology for superior micropower performance. The device family includes variants with different temperature ratings and packaging options, such as the PAL and DA packages, to accommodate diverse environmental and form-factor constraints.

Replacement Considerations

Consult factory documentation for custom screening versions or leaded (non-RoHS) alternatives if required. No direct public substitute part numbers are confirmed in the provided datasheet.