AD712 Datasheet | Next Electromics

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AD712 High-Speed, Precision Monolithic Operational Amplifier

Overview

The AD712 is a high-speed, precision monolithic operational amplifier that delivers exceptional performance at a competitive price point. Utilizing advanced laser wafer trimming technology, this amplifier achieves remarkably low offset voltage and drift characteristics. The AD712 serves as an enhanced replacement for legacy BiFET amplifiers like the LF412 and TL082, while also offering superior performance compared to many bipolar op amps. Its combination of excellent AC and DC characteristics makes it particularly well-suited for demanding applications such as active filters, high-speed integrators, and precision signal conditioning.

Key advantages of the AD712 include its fast settling time (1 µs to ±0.01%) and high slew rate (16 V/µs), which enable precise signal processing in data conversion systems. The amplifier's robust performance profile makes it an ideal choice for buffering 12-bit D/A and A/D converters, where signal integrity and timing precision are critical.

Features

Enhanced Performance: Superior replacement for LF412 and TL082 amplifiers
High-Speed Operation: Settles to ±0.01% in 1.0 µs
Fast Slew Rate: 16 V/µs minimum (AD712J grade)
Wide Bandwidth: 3 MHz minimum unity gain bandwidth (AD712J grade)
Precision DC Characteristics:
- 0.30 mV maximum offset voltage (AD712C grade)
- 5 µV/°C maximum offset voltage drift (AD712C grade)
- 200 V/mV minimum open-loop gain (AD712K grade)
Low Noise: 4 µV p-p maximum noise (0.1 Hz to 10 Hz, AD712C grade)
Packaging Options: Available in plastic mini-DIP, plastic SOIC, hermetic CERDIP, hermetic metal can, and chip form
Surface Mount: Tape and reel packaging available per EIA-481A standard
Military Grade: MIL-STD-883B compliant versions available
Family Options: Single version (AD711) and quad version (AD713) available

Applications

The AD712's combination of precision and speed makes it suitable for a wide range of demanding applications:

Data Conversion Systems: Ideal buffer for 12-bit D/A and A/D converters
Active Filters: Superior AC performance enables high-quality filter implementations
High-Speed Integrators: Fast settling time ensures accurate integration
Precision Instrumentation: Low offset and drift characteristics support measurement applications
Signal Conditioning: Excellent for amplifying and preparing signals for further processing
Audio Processing: Suitable for high-fidelity audio applications
Medical Equipment: Precision characteristics meet demanding medical instrumentation requirements
Military/Aerospace Systems: Available in military-grade versions for critical applications

Electrical Characteristics

The AD712 offers different performance grades to suit various application requirements:

DC Characteristics (Typical @ 25°C, ±15V Supply)

Input Offset Voltage:
- AD712C: 0.3 mV max
- AD712J: 0.5 mV max
- AD712K: 0.5 mV max
Input Offset Voltage Drift:
- AD712C: 5 µV/°C max
- AD712J: 10 µV/°C max
- AD712K: 10 µV/°C max
Input Bias Current: 50 pA max
Input Offset Current: 25 pA max
Open-Loop Gain:
- AD712K: 200 V/mV min
- AD712J: 100 V/mV min
Common-Mode Rejection Ratio: 90 dB min
Power Supply Rejection Ratio: 90 dB min

AC Characteristics (Typical @ 25°C, ±15V Supply)

Slew Rate:
- AD712J: 16 V/µs min
- AD712K: 13 V/µs min
Gain Bandwidth Product:
- AD712J: 3 MHz min
- AD712K: 3 MHz min
Settling Time to ±0.01%: 1 µs
Input Voltage Noise:
- AD712C: 4 µV p-p (0.1 Hz to 10 Hz)
- 15 nV/√Hz at 1 kHz

Power Characteristics

Supply Voltage Range: ±5V to ±18V
Quiescent Current: 5 mA max per amplifier
Operating Temperature Range:
- Commercial (C): 0°C to +70°C
- Industrial (I): -40°C to +85°C
- Military (M): -55°C to +125°C