OP42ARC/883C - Fast Precision JFET Op Amp | Analog Devices
MPN: OP42ARC/883C ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $25.5 | $25.50 |
| 10 | $23.2 | $232.00 |
| 100 | $20.1 | $2,010.00 |
| 500 | $18.4 | $9,200.00 |
| 1,000 | $16.8 | $16,800.00 |
OP42ARC/883C Overview
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used to perform mathematical operations such as addition, subtraction, integration, and differentiation in analog circuits. The OP42 belongs to the JFET-input op amp family, which offers very high input impedance and low input bias current, making it suitable for precision instrumentation and sensor interfaces. As a linear integrated circuit, it is a fundamental building block in analog signal processing, bridging the gap between sensors and analog-to-digital converters.
Key features of the OP42ARC/883C include its symmetric slew rate of 58 V/µs, which ensures symmetrical large-signal response, and a fast settling time of 800 ns to 0.01%, enabling accurate acquisition in high-speed data acquisition systems. The device also offers a supply current of less than 6 mA, making it power-efficient for its speed class. Its JFET input stage provides low input bias current and high input impedance, reducing loading on high-impedance sources. The device is internally compensated for unity-gain operation, simplifying design and ensuring stability without external components.
Technically, the OP42 uses a JFET input stage followed by a precision bipolar output stage, achieving a balance between speed and DC accuracy. The device is designed to upgrade circuits using the AD544, AD611, AD711, and LF400 by direct replacement, and it conforms to the standard 741 pinout with nulling to V-. This pin compatibility allows for easy upgrades in existing designs. The device's wide full-power bandwidth of 900 kHz and fast settling time make it suitable for high-frequency signal processing, while its low offset voltage and drift ensure precision in DC applications.
Typical applications include high-speed data acquisition systems, precision instrumentation, active filters, and fast servo control loops. The OP42's high slew rate and settling time make it ideal for driving analog-to-digital converters (ADCs) and sample-and-hold circuits, where fast and accurate signal acquisition is critical. Its JFET input stage is also well-suited for photodiode amplifiers and other high-impedance sensor interfaces.
When designing with the OP42ARC/883C, consider the supply voltage and decoupling. Use 0.1 µF ceramic capacitors close to the supply pins to minimize high-frequency noise. For optimal performance, ensure the input common-mode voltage stays within the specified range and provide adequate output load isolation if driving capacitive loads.
Drop-in alternatives for OP42ARC/883C — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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| Amplifier Type | J-FET |
| Number of Circuits | 1 |
| Slew Rate | 58 V/µs |
| Supply Voltage | ±15 V |
| Input Bias Current | 20 nA |
| CMRR | 94 dB |
| Full-Power Bandwidth | 900 kHz |
| Settling Time | 800 ns to 0.01% |
| Supply Current | 6 mA (max) |
| Operating Temperature Range | -55°C to +125°C |
| Package Type | 20-CLCC (9x9) |
| Number of Pins | 20 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Military Grade | Yes (883C) |
OP42ARC/883C Pin Configuration
| Pin 1 | NULL — Offset null |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | NULL — Offset null |
| Pin 6 | OUT — Output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | NC — No connection |
Typical Applications
OP42ARC/883C is suitable for 6 applications: High-Speed Data Acquisition, Precision Instrumentation, Active Filters, Fast Servo Control, Audio Signal Processing, Aerospace and Defense.
High-Speed Data Acquisition
The OP42ARC/883C's 58 V/µs slew rate and 800 ns settling time to 0.01% make it ideal for driving high-speed ADCs and sample-and-hold circuits. Its fast settling ensures accurate capture of fast transients, while the JFET input minimizes loading on high-impedance sources. In a data acquisition front-end, the OP42 can be used as a buffer or gain stage, providing the necessary drive capability and precision. The wide full-power bandwidth of 900 kHz supports high-frequency signals, and the low input bias current of 20 nA preserves signal integrity. This makes the OP42 suitable for applications such as digitizers, spectrum analyzers, and medical imaging systems where speed and accuracy are paramount.
Recommended
Precision Instrumentation
With a CMRR of 94 dB and low offset voltage, the OP42ARC/883C excels in precision instrumentation applications such as strain gauge amplifiers, thermocouple conditioners, and precision voltage references. Its JFET input provides high input impedance, reducing errors from source impedance. The device's low noise (38 nV/√Hz) and low drift (5 µV/°C) ensure stable, accurate measurements over temperature. In a precision instrumentation amplifier, the OP42 can be used in the input stage to provide high gain with minimal offset and noise. The military temperature range (-55°C to +125°C) makes it suitable for aerospace test equipment and industrial process control.
Recommended
Active Filters
The OP42ARC/883C's high slew rate and wide bandwidth make it suitable for active filter designs, including Butterworth, Chebyshev, and Bessel filters. Its unity-gain stability allows for easy implementation of Sallen-Key and multiple-feedback topologies. The device's low input bias current and high input impedance minimize filter errors, while its fast settling ensures accurate transient response. In a high-pass or low-pass filter, the OP42 can achieve cutoff frequencies up to several hundred kilohertz with minimal distortion. The symmetric slew rate ensures symmetrical large-signal response, which is critical for maintaining filter shape at high amplitudes. This makes the OP42 ideal for anti-aliasing filters in data acquisition systems and communication receivers.
Recommended
Fast Servo Control
In fast servo control loops, the OP42ARC/883C provides the high slew rate and bandwidth needed to respond quickly to position or velocity errors. Its 58 V/µs slew rate allows the amplifier to drive large voltage changes rapidly, while its 10 MHz gain-bandwidth product ensures adequate loop gain at high frequencies. The device's low output impedance and ±20 mA output current capability enable it to drive power stages directly. In a servo loop, the OP42 can be used as an error amplifier, summing junction, or loop compensation element. Its precision DC characteristics, such as low offset and drift, ensure accurate steady-state positioning. The military temperature range makes it suitable for aerospace actuators and industrial robotics.
Recommended
Audio Signal Processing
The OP42ARC/883C can be used in high-end audio equipment, such as preamplifiers, active crossovers, and equalizers, where its high slew rate and low distortion are beneficial. Its JFET input provides a natural, transparent sound, and its low noise (38 nV/√Hz) ensures a quiet background. The device's wide bandwidth (10 MHz) allows for accurate reproduction of high-frequency audio signals. In an audio preamplifier, the OP42 can provide gain with minimal coloration, and its high input impedance preserves the signal from high-impedance sources like magnetic pickups. The symmetric slew rate ensures symmetrical handling of positive and negative signal swings, reducing harmonic distortion. This makes the OP42 suitable for audiophile-grade audio systems.
Recommended
Aerospace and Defense
The OP42ARC/883C is designed for military and aerospace applications, with its 883C qualification ensuring compliance with MIL-STD-883. Its operating temperature range of -55°C to +125°C and ceramic CLCC-20 package provide reliability in extreme environments. The device's high slew rate and precision make it suitable for radar signal processing, guidance systems, and flight control electronics. In a radar receiver, the OP42 can be used in the IF amplifier stage to provide high gain and fast response. Its low input bias current and high CMRR ensure accurate signal processing in noisy environments. The device's long-term stability and radiation tolerance make it ideal for space applications.
Recommended
Recommended Products Summary
Engineering reference data for OP42ARC/883C — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OP42AZ | OP42GP | OP42FZ | LF400 | AD711 |
|---|---|---|---|---|---|---|
| Package | 20-CLCC (9x9) | 8-PDIP | 8-PDIP | 8-CERDIP | 8-PDIP | 8-PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | National Semiconductor | Analog Devices |
| Slew Rate | 58 V/µs | 58 V/µs | 58 V/µs | 58 V/µs | 50 V/µs | 20 V/µs |
| Supply Voltage | ±15 V | ±15 V | ±15 V | ±15 V | ±15 V | ±15 V |
| Input Bias Current | 20 nA | 20 nA | 20 nA | 20 nA | 50 nA | 25 pA |
| CMRR | 94 dB | 94 dB | 94 dB | 94 dB | 90 dB | 80 dB |
| Operating Temperature | -55°C to +125°C | 0°C to +70°C | 0°C to +70°C | -55°C to +125°C | -55°C to +125°C | 0°C to +70°C |
| Supply Current | 6 mA | 6 mA | 6 mA | 6 mA | 5 mA | 2.5 mA |
Key Differentiators
- Military-grade qualification (883C) (vs OP42AZ)
- Higher slew rate than AD711 (vs AD711)
- Lower input bias current than LF400 (vs LF400)
Design Notes
The OP42ARC/883C operates from ±15 V supplies. Use 0.1 µF ceramic capacitors close to the V+ and V- pins to decouple high-frequency noise. Additionally, a 10 µF tantalum capacitor on each supply rail can help maintain stability during transient load changes. Ensure the supply voltages are within the absolute maximum ratings to prevent damage.
For optimal performance, place the OP42ARC/883C away from high-frequency digital circuits to minimize noise coupling. Use a ground plane to provide a low-impedance return path. Keep input traces short and shielded if necessary. The CLCC-20 package has an exposed pad; solder it to a thermal pad on the PCB to improve heat dissipation.
Avoid driving capacitive loads directly without isolation, as this can cause oscillation. Use a series resistor (e.g., 50 Ω) at the output if driving cables or long traces. Also, ensure the input common-mode voltage does not exceed the specified range to prevent phase reversal. The OP42 is internally compensated for unity gain, but external compensation may be needed for non-inverting gains less than 1.
Compliance Information
RoHS compliant per DigiKey. Military grade (883C) may have exemptions for certain applications.