ALD1712BSAL

Overview

The ALD1712BSAL is a monolithic precision operational amplifier manufactured by Advanced Linear Devices using enhanced ACMOS silicon gate CMOS process. It features rail-to-rail input and output capabilities, allowing operation with supply voltages ranging from +5V to +10V single supply or ±2.5V to ±5V dual supply. Key electrical parameters include a unity gain bandwidth of 1.5MHz, a slew rate of 2.1V/µs, and an extremely low typical input bias current of 0.01pA. The device offers high voltage gain (typically 85V/mV at ±2.5V) and operates within a temperature range of 0°C to +70°C in its SOIC-8 package.

Feature Summary

• Rail-to-rail input and output operation enables full signal swing without losing operating voltage margin.
• Input stage operates linearly up to 300mV beyond the supply rails without phase reversal.
• Internally compensated for unity gain stability, eliminating the need for external frequency compensation components.
• Robust design suitable for rugged environments and temperature-extreme conditions.

Applications

• Voltage amplifier
• Photodiode amplifier
• Data acquisition systems
• Active filters
• Picoammeter

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin Small Outline Plastic DIP (SOIC) package configuration. Confirm that the component meets RoHS compliance standards as indicated by the lead-free designation. Ensure the selected variant matches the required operating temperature range of 0°C to +70°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring rail-to-rail performance on standard 5V single supplies or ±5V dual supplies. It is particularly suitable for applications demanding extremely low input bias currents, such as picoammeters or charge integrators. Consider the 1.5MHz bandwidth and 2.1V/µs slew rate for moderate-speed signal conditioning tasks where high impedance inputs are critical.

Part Context

The ALD1712 series includes variants like ALD1712A, ALD1712B, and ALD1712, differentiated primarily by offset voltage specifications. The ALD1712BSAL specifically denotes the B-grade version housed in an 8-pin SOIC package. This family is designed for mixed digital/analog systems sharing a 5V power supply, offering versatility through its wide common-mode input range and high drive capability.

Replacement Considerations

Direct substitutes may include other rail-to-rail CMOS op-amps with similar 5V supply compatibility and low bias current characteristics. Verify pinout compatibility and ensure replacement devices support the required 4000pF capacitive load driving capability if used in buffer configurations.

FAQ

Does the ALD1712BSAL require external frequency compensation?

No, the device is internally compensated for unity gain stability and does not require external frequency compensation components.

What is the maximum capacitive load the ALD1712BSAL can drive?

The output stage can typically drive up to 4000pF of capacitive load at a gain of 5, and up to 400pF in a non-inverting unity gain connection.

How does the input stage handle voltages beyond the supply rails?

The input stage operates linearly with input voltages extending up to 300mV above and below the supply voltages without adverse effects or phase reversals.