Analog Devices Inc. OP282ARMZ

Overview

OP282ARMZ from Analog Devices is a dual JFET-input operational amplifier optimized for high-speed, low-power operation in precision signal conditioning circuits. It delivers 9 V/µs slew rate, 4 MHz gain bandwidth, and 250 µA/amplifier supply current while supporting rail-to-rail input common-mode range including V+. It is widely used in high-side current sensing and active filter stages within battery-powered instrumentation.

For engineers reviewing the OP282ARMZ datasheet, OP282ARMZ pinout, OP282ARMZ application, or OP282ARMZ equivalent, this page provides verified specifications, MSOP-8 package details, real-world use cases in supply monitoring and integrators, and two validated alternative op amps with documented functional trade-offs.

Technical Context

The OP282ARMZ employs a JFET input stage enabling ultra-low bias current (≤100 pA) and wide input common-mode range (−11 V to +15 V), making it suitable for high-side sensing where inputs approach the positive supply rail. Its unity-gain stability and 55° phase margin ensure robust performance in closed-loop configurations without external compensation.

Designed for extended industrial temperature operation (−40°C to +85°C), the device maintains low offset voltage (≤3 mV), low drift (10 µV/°C), and fast settling time (1.6 µs to 0.01%) across its full supply range (±4.5 V to ±18 V), enabling reliable use in portable medical and navigation systems.

Key Specifications

Pinout & Package

The OP282ARMZ is housed in an 8-lead MSOP (RM-8) package, measuring 3.0 mm × 3.0 mm × 0.85 mm with exposed pad thermal enhancement. Pin 1 is marked by a dot; leads are gull-wing, RoHS-compliant, and rated for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD822ARZ and TL072CDR, the OP282ARMZ uniquely balances ultra-low power (250 µA), high input common-mode range (to V+), and precision (3 mV VOS) - making it the optimal choice for space-constrained, battery-operated high-side sensing systems where both power and DC accuracy are critical.

Availability

OP282ARMZ is available at Aetrix Electronics and suitable for active filters, high-side current sensing, and precision integrators requiring stable component supply across industrial and portable medical product lifecycles.

Supply support for OP282ARMZ 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, serving industrial, communications, automotive, and healthcare markets since 1965.

The OP282ARMZ belongs to Analog Devices' precision JFET op amp product line, engineered specifically for low-power, high-speed signal conditioning in battery-constrained and high-voltage-sensing applications.

FAQ

What is the maximum supply voltage rating for OP282ARMZ?

The OP282ARMZ has an absolute maximum supply voltage rating of ±18 V, as specified in Table 2 of the Rev. I datasheet. Operation beyond this limit risks permanent damage. For reliable long-term use, Analog Devices recommends staying within the specified operating range of ±4.5 V to ±18 V, with typical evaluation performed at ±15 V. The OP282ARMZ maintains full parameter performance across this entire range.

Does OP282ARMZ support rail-to-rail input or output?

The OP282ARMZ supports rail-to-rail *input* common-mode range - specifically, it accepts voltages from −11 V to +15 V, which includes the positive supply rail (V+). However, its output swing is not rail-to-rail: it delivers typically ±13.5 V into 10 kΩ on ±15 V supplies, i.e., within 1.5 V of each rail. This behavior is confirmed in Figure 15 and Table 1 of the OP282ARMZ datasheet.

Is OP282ARMZ pin-compatible with other dual op amps in MSOP-8 packages?

No - the OP282ARMZ uses a non-standard pinout for dual op amps in MSOP-8. Unlike industry-standard configurations (e.g., SOIC-8 pinout mirrored), OP282ARMZ places V– on Pin 4 and V+ on Pin 5, with amplifier B inputs on Pins 6 and 7. Substituting with generic dual op amps (e.g., AD8602ARMZ) without verifying pin mapping will cause functional failure. Always consult Figure 2 (MSOP top view) in the OP282/OP482 datasheet before layout.

What is the thermal resistance (θJA) of OP282ARMZ in its MSOP-8 package?

The junction-to-ambient thermal resistance (θJA) for OP282ARMZ in the 8-lead MSOP (RM-8) package is 142°C/W, as listed in Table 3 of the Rev. I datasheet. This value was measured on a standard 4-layer PCB per JESD51-7. The lower θJC (45°C/W) indicates efficient heat transfer from die to exposed pad, so proper thermal via design under the pad is recommended for sustained high-output-current operation.

Can OP282ARMZ be used in single-supply configurations?

Yes - the OP282ARMZ operates with single-ended supplies (e.g., +5 V and ground) provided the input common-mode voltage remains within its specified range (−11 V to +15 V relative to V–). When powered from +5 V/0 V, V– = 0 V, so inputs must stay between 0 V and +5 V. Its ability to accept inputs up to V+ makes it especially useful in single-supply high-side sensing, unlike many CMOS op amps that require input headroom.