ALD1702BPAL

Overview

The ALD1702BPAL is a dual monolithic CMOS micropower high slew rate operational amplifier manufactured by Advanced Linear Devices Inc. It features rail-to-rail input and output voltage ranges, making it suitable for +5V single supply or ±2.5V to ±5V dual supply systems. The device offers a unity gain bandwidth of 1.5MHz, a slew rate of 2.1V/µs, and extremely low input bias current of 1pA typical. It operates within a temperature range of 0°C to +70°C and is housed in an 8-PDIP package.

Feature Summary

• Rail-to-rail input and output voltage ranges allow implementation of numerous analog serial stages without losing operating voltage margin.
• Extremely low input bias currents of 1.0pA typical make the device ideal for high source impedance applications.
• No frequency compensation required as the device is unity gain stable.
• High load capacitance capability with typical drive of up to 4000pF.

Applications

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

Procurement Notes

Verify that the ordering suffix 'PAL' corresponds to the lead-free (RoHS) compliant version in the 8-pin Plastic DIP package. Confirm the specific grade (A, B, or standard) matches the required offset voltage and drift specifications for your application. Ensure the operating environment stays within the 0°C to +70°C range specified for this package type.

Selection Notes

Select the ALD1702BPAL when a precision, low-power CMOS op-amp with rail-to-rail capabilities is needed for 5V systems. Its high input impedance and low bias current are critical for sensor interfaces. Consider the ±2.5V to ±5V dual supply or +5V to +10V single supply operation limits. The 8-PDIP package is suitable for through-hole prototyping and general-purpose circuit designs requiring robust performance.

Part Context

The ALD1702 series includes variants like ALD1702A, ALD1702B, and ALD1703, all sharing the same pinout and core architecture. The 'BPAL' designation indicates the B-grade performance level packaged in a lead-free 8-pin PDIP. This component belongs to Advanced Linear Devices' enhanced ACMOS silicon gate process family, designed for mixed digital/analog applications.

Replacement Considerations

The datasheet notes compatibility with µA741 and ICL7611 pin configurations. Verify if direct pin-for-pin replacements from other manufacturers meet the specific rail-to-rail and low-bias-current requirements of the ALD1702BPAL.

FAQ

What is the maximum load capacitance the ALD1702BPAL can drive?

The device can typically drive 400pF of external load capacitance in a unity gain buffer configuration without stability problems. In the inverting unity gain mode, it can drive up to 800pF.

Does the ALD1702BPAL require external frequency compensation?

No, the ALD1702BPAL is internally compensated for unity gain stability and does not require external frequency compensation components.

What is the typical input bias current for this component?

The typical input bias current is 1.0pA at room temperature, with a maximum specification of 30pA at 25°C.