ALD1721GSAL

Overview

The ALD1721GSAL 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 minimal supply overhead. The device operates on single supplies from 2V to 10V or dual supplies from ±1V to ±5V. Key electrical specifications include a typical input offset voltage of 0.05 mV, maximum input bias current of 10 pA, unity gain bandwidth of 700 kHz, and slew rate of 0.7 V/µs. Supply current is typically 110 µA at ±2.5V.

Feature Summary

• Extremely low input signal power draw minimizes source loading effects
• Rail-to-rail input and output voltage capabilities reduce supply overhead
• Internally compensated for unity gain stability without external components
• Robust design suitable for 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 variant. Confirm RoHS compliance status as indicated by the 'L' suffix in ordering information. Ensure the operating temperature range requirements match the commercial grade specification (0°C to +70°C). Check for any custom screening needs if high-temperature versions are required.

Selection Notes

Select this component when minimizing input signal power is critical for signal integrity. The rail-to-rail architecture supports low-voltage single-supply systems. Verify that the load capacitance does not exceed 50pF to maintain stability. Consider the 10KΩ minimum resistive load requirement. Evaluate thermal dissipation limits relative to ambient conditions.

Part Context

The ALD1721GSAL belongs to the ALD1721 family of precision micro-power CMOS operational amplifiers. It shares pin compatibility with industry standard μA741 and ICL7611 types. The 'G' suffix indicates lead-free (RoHS) construction. The 'SAL' designation specifies the SOIC-8 surface mount package configuration within the product line.

Replacement Considerations

Direct pin-compatible replacements include other CMOS micropower op-amps with rail-to-rail I/O. Verify that substitute devices meet the 10 pA maximum input bias current and 0.7 V/µs slew rate specifications. Ensure the replacement maintains unity gain stability and similar supply voltage ranges.