ALD4702APBL

Overview

The ALD4702APBL is a quad monolithic precision CMOS rail-to-rail operational amplifier manufactured by Advanced Linear Devices. It features symmetrical push-pull class AB output drivers and operates on dual supplies from ±2.5V to ±5.0V or single supply from +5V to +10V. Key electrical parameters include a unity gain bandwidth of 1.5MHz, a slew rate of 1.9V/µs, and typical input bias current of 1.0pA. The device settles to 0.01% in 8µs with large signal voltage gain typically reaching 250V/mV at ±5.0V. It supports high load capacitance up to 4000pF and includes internal offset voltage trimming.

Feature Summary

• Rail-to-rail input and output voltage ranges allow operation close to power supply rails.
• Extremely low input bias currents suitable for high source impedance applications.
• Internally compensated for unity gain stability without external frequency compensation.
• On-chip offset voltage trimming eliminates the need for external nulling circuits.

Applications

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

Procurement Notes

Verify the specific suffix 'PBL' corresponds to the 14-pin PDIP package with lead-free (RoHS) compliance and an operating temperature range of 0°C to +70°C. Confirm that the ordering information matches the manufacturer's current datasheet version, as suffixes may denote variations in packaging material or environmental ratings. Ensure compatibility with standard DIP-14 footprints during integration.

Selection Notes

Select this component when designing circuits requiring rail-to-rail performance with low supply voltages such as ±2.5V or +5V. It is appropriate for applications demanding high input impedance due to its pA-level bias current. Consider the 1.5MHz bandwidth and 1.9V/µs slew rate for moderate-speed signal processing tasks. Verify that the required load capacitance does not exceed the specified limits for stable operation in the chosen configuration.

Part Context

This part belongs to the ALD4702 family of quad operational amplifiers produced using enhanced ACMOS silicon gate CMOS process technology. The series is designed as a versatile alternative to legacy JFET input amplifiers, offering improved performance in low-voltage battery-operated systems. The ALD4702APBL specifically denotes the plastic DIP variant within this lineup.

Replacement Considerations

The datasheet notes compatibility with industry pin configurations found in LM324 and ICL7641 types. Designers should verify pinout alignment and electrical parameter margins before substituting these legacy parts. No direct cross-reference part numbers are explicitly listed in the provided documentation.

FAQ

Can the ALD4702APBL drive large capacitive loads?

Yes, the device can drive up to 4000pF of load capacitance at a gain of 5, and up to 400pF in non-inverting unity gain connection without stability issues.

What is the maximum common mode input voltage range?

The inputs can extend beyond the supply rails by up to 300mV, allowing for a common mode input voltage range that exceeds the positive supply voltage slightly.

Is external frequency compensation required?

No, the ALD4702APBL is internally compensated for unity gain stability and does not require external frequency compensation components.