Analog Devices Inc. AD548JRZ-REEL7

Overview

AD548JRZ-REEL7 from Analog Devices is a precision, low-power BiFET operational amplifier in SOIC-8 package, delivering 1 MHz unity-gain bandwidth, 1.8 V/µs slew rate, and ≤2 mV input offset voltage (J grade) for high-accuracy signal conditioning. It operates from ±4.5 V to ±18 V supplies, draws ≤200 µA quiescent current, and targets battery-powered instrumentation front ends and CMOS DAC output buffering.

For engineers reviewing the AD548JRZ-REEL7 datasheet, AD548JRZ-REEL7 pinout, AD548JRZ-REEL7 application, or AD548JRZ-REEL7 equivalent, key selection criteria include guaranteed warm-up bias current ≤10 pA, laser-trimmed offset drift ≤20 µV/°C, 82 dB minimum CMRR (B grade), and SOIC-8 compatibility with industry-standard op amp footprints such as TL061 and LF441.

Technical Context

The AD548JRZ-REEL7 uses ion-implanted JFET input stages and laser wafer trimming to achieve stable DC performance across temperature. Its input bias current remains ≤10 pA (warmed up) over the full common-mode range (±11 V), and offset voltage is trimmed to ≤2 mV with ≤20 µV/°C drift - eliminating need for external nulling in most applications.

AC performance is optimized for low-power precision: 1 MHz small-signal bandwidth supports 700 kHz closed-loop operation at G = 1, while 1.8 V/µs slew rate enables 14 µs settling to ±0.01% for 20 V steps. Input voltage noise is 2 µV p-p (0.1–10 Hz) and 30 nV/√Hz at 1 kHz, supporting low-noise photodiode preamplification and log-ratio circuits.

Key Specifications

Pinout & Package

AD548JRZ-REEL7 is housed in an 8-lead SOIC (R-8) package per JEDEC MS-012AA, with standard op amp pinout and exposed pad not connected. Pin 4 is internally tied to the case (V– connection point).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Compared with TLC27L1CDR and OPA340UA, AD548JRZ-REEL7 uniquely balances laser-trimmed DC precision (≤2 mV, ≤20 µV/°C), guaranteed ≤10 pA warmed-up bias current, and 1.8 V/µs slew rate in a legacy-compatible SOIC-8 footprint - making it irreplaceable in calibrated instrumentation where long-term drift and low-frequency noise dominate error budgets.

Availability

AD548JRZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation front ends, CMOS DAC output buffering, photodiode preamplification, log-ratio signal conditioning, and precision analog sensor interfaces requiring stable component supply across extended product lifecycles.

Supply support for AD548JRZ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD548 series belongs to Analog Devices' precision BiFET op amp product line, engineered specifically for low-power, high-accuracy DC-coupled applications including portable test equipment, sensor signal chains, and industrial process control interfaces.

FAQ

What is the maximum guaranteed input bias current for AD548JRZ-REEL7 after warm-up?

The AD548JRZ-REEL7 guarantees ≤10 pA input bias current after five minutes of operation at 25°C, measured at either input with common-mode voltage at 0 V. This specification holds across the full commercial temperature range (0°C to 70°C) and is validated per Analog Devices' warmed-up testing protocol - ensuring real-world stability in precision sensor interfaces where leakage current directly impacts accuracy.

Does AD548JRZ-REEL7 require external offset nulling in typical applications?

No - AD548JRZ-REEL7 uses laser wafer drift trimming to achieve ≤2 mV initial input offset voltage and ≤20 µV/°C drift, eliminating the need for external nulling in most applications. Pins 1 and 5 are provided for manual adjustment only in cases demanding sub-500 µV offset; using them adds ~0.24 µV/°C drift per 100 µV nulled, so default operation without connection is recommended for optimal thermal stability.

Can AD548JRZ-REEL7 operate from a single +9 V supply?

Yes - AD548JRZ-REEL7 supports single-supply operation with total supply voltage ≥9 V (e.g., +9 V and GND), though its specified performance assumes dual ±4.5 V to ±18 V. At +9 V/GND, input common-mode range is limited to 3 V above GND and 1 V below +9 V (i.e., 3 V to 8 V), and output swing reduces to ~±3.5 V. For optimal DC accuracy, dual supplies are recommended per the datasheet's rated conditions.

Is AD548JRZ-REEL7 pin-compatible with TL061CP?

Yes - AD548JRZ-REEL7 uses the standard 8-pin SOIC op amp pinout (V+, –IN, +IN, V–, NC, OUTPUT, V+, OFFSET NULL) matching TL061CP, LF441, and AD542. Pin 4 is V– (not ground), and Pin 8 is NC - identical to TL061CP. No PCB modification is needed for direct replacement, and the AD548JRZ-REEL7 improves power dissipation by up to 85% while maintaining or exceeding all key DC/AC specs.

What is the small-signal bandwidth of AD548JRZ-REEL7 in unity-gain follower configuration?

The AD548JRZ-REEL7 delivers 1.0 MHz unity-gain bandwidth under standard test conditions (RL ≥ 10 kΩ, ±15 V supplies). In practice, closed-loop bandwidth in a unity-gain follower is ~700 kHz due to phase margin optimization, supporting clean 20 V step responses with 14 µs settling to ±0.01%. This bandwidth is maintained across the full 0°C to 70°C operating range and enables stable operation with capacitive loads up to 100 pF when properly compensated.