Analog Devices Inc. OP285GSZ-REEL7

Overview

OP285GSZ-REEL7 from Analog Devices is a dual precision operational amplifier featuring a Butler Amplifier front-end, delivering 9 MHz gain-bandwidth product, 22 V/µs slew rate, and 250 µV max input offset voltage. It operates from ±4.5 V to ±22 V supplies, draws 5 mA per amplifier, and is optimized for high-fidelity audio, active filters, and fast integrators in industrial and instrumentation systems.

For engineers reviewing the OP285GSZ-REEL7 datasheet, OP285GSZ-REEL7 pinout, OP285GSZ-REEL7 application, or OP285GSZ-REEL7 equivalent, key selection criteria include low 6 nV/√Hz voltage noise at 1 kHz, guaranteed ±10.5 V common-mode input range, unity-gain stability with capacitive loads up to 1000 pF, and extended industrial temperature operation (−40°C to +85°C).

Technical Context

The OP285GSZ-REEL7 integrates bipolar transistors for precision and low drift with JFET inputs for speed and low bias current, enabling simultaneous high DC accuracy and dynamic performance. Its laser-trimmed input stage ensures ≤250 µV offset voltage and ≤1 µV/°C drift, while the monolithic dual architecture guarantees matched ac characteristics between amplifiers A and B.

This design supports demanding applications requiring low phase error (e.g., composite amplifiers), fast overload recovery (~1.2 µs to +10 V), and robust output drive into 600 Ω or >1000 pF loads without external compensation. The device includes internal input Zener clamps (±7.5 V differential) and output short-circuit protection (±30 mA design limit).

Key Specifications

Pinout & Package

OP285GSZ-REEL7 is housed in an 8-lead narrow-body SOIC_N (R-8) package compliant with JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OP277GPZ and AD8620ARZ, the OP285GSZ-REEL7 uniquely balances 9 MHz bandwidth, 22 V/µs slew rate, and laser-trimmed dual-channel matching-making it the only option among the three capable of low-phase-error composite amplifier designs and stable 1000 pF capacitive load drive without compensation.

Availability

OP285GSZ-REEL7 is available at Aetrix Electronics and suitable for high-fidelity audio systems, active filter modules, instrumentation front-ends, and high-speed ADC driver circuits requiring stable component supply across industrial temperature ranges.

Supply support for OP285GSZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The OP285GSZ-REEL7 belongs to Analog Devices' precision op-amp product line, engineered specifically for applications demanding simultaneous high DC accuracy, low noise, and medium-speed dynamics-such as industrial instrumentation, medical sensors, and pro-audio signal chains.

FAQ

What is the maximum supply voltage rating for the OP285GSZ-REEL7?

The OP285GSZ-REEL7 has an absolute maximum supply voltage rating of ±22 V. Operation beyond this risks permanent damage. For reliable long-term use, Analog Devices specifies the recommended operating range as ±4.5 V to ±22 V, with typical performance characterized at ±15 V. The device's PSRR exceeds 85 dB across this full range, ensuring stable operation even with noisy rails.

Does the OP285GSZ-REEL7 support unity-gain stable operation with capacitive loads?

Yes, the OP285GSZ-REEL7 is unity-gain stable and designed to drive capacitive loads exceeding 1000 pF without external compensation. Data Sheet Figure 18 confirms stable 0 dB bandwidth down to ~1 MHz with 1000 pF load. This capability simplifies PCB layout in DAC output buffers and cable drivers where stray capacitance is unavoidable.

What is the guaranteed input offset voltage specification for the OP285GSZ-REEL7 over temperature?

The OP285GSZ-REEL7 guarantees a maximum input offset voltage of 600 µV over the full extended industrial temperature range (−40°C to +85°C). At room temperature (25°C), the typical value is 35 µV and maximum is 250 µV. This laser-trimmed performance eliminates the need for external nulling circuitry in dc-coupled applications like sensor amplifiers.

How does the OP285GSZ-REEL7 handle output short-circuit conditions?

The OP285GSZ-REEL7 incorporates internal short-circuit protection via a 30 Ω series resistor at each output. With ±15 V supplies, this limits typical short-circuit current to +40 mA (source) and −90 mA (sink). However, Analog Devices explicitly warns that shorts to either supply rail may destroy the device; design practice limits output current to ±30 mA using external series resistors (Figure 1).

Can the OP285GSZ-REEL7 be used in low-phase-error composite amplifier configurations?

Yes, the OP285GSZ-REEL7's monolithic dual architecture ensures tightly matched ac characteristics between its two amplifiers, enabling low-phase-error composite designs (Figure 12). When configured as a 10× gain composite amplifier, it achieves <1.5° phase shift through 500 kHz-versus 25° for a single-stage design-due to cancellation of dominant poles between matched sections.