Analog Devices Inc. OP295GPZ

Overview

OP295GPZ from Analog Devices is a dual rail-to-rail output operational amplifier optimized for precision, low-power, single-supply operation across 3 V to 36 V. It delivers 300 μV max offset voltage, 75 kHz gain bandwidth product, 150 μA per amplifier supply current, and ±11 mA output drive at 5 V - enabling high-accuracy sensor conditioning and battery-powered instrumentation.

For engineers reviewing the OP295GPZ datasheet, OP295GPZ pinout, OP295GPZ application, or OP295GPZ equivalent, key selection criteria include rail-to-rail output swing with zero-in/zero-out capability, extended industrial temperature range (−40°C to +125°C), low-noise performance (51 nV/√Hz), and stability driving >300 pF capacitive loads without external compensation.

Technical Context

The OP295GPZ uses a bipolar front-end architecture to achieve lower noise and higher dc accuracy than CMOS rail-to-rail op amps, while retaining rail-to-rail output swing. Its input common-mode range includes the negative rail (0 V at 3 V supply) and extends to within ~800 mV of the positive rail.

It features unity-gain stability, high open-loop gain (≥1000 V/mV), and robust capacitive load drive capability (>300 pF), making it suitable for driving FET gates, coaxial cables, and H-bridge control nodes without oscillation - unlike many CMOS alternatives that require isolation resistors.

Key Specifications

Pinout & Package

OP295GPZ is packaged in an 8-lead narrow-body SOIC_N (R-8) surface-mount package with standard dual-op-amp pinout and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.

Compared with OP295GPZ, OP297GPZ trades rail-to-rail output and ultra-low power for extreme dc precision, while MCP6022-E/SN offers higher speed and lower input bias at the cost of increased offset and reduced high-temperature reliability - making OP295GPZ the optimal balance for battery-powered, rail-constrained, precision analog front-ends.

Availability

OP295GPZ is available at Aetrix Electronics and suitable for battery-operated instrumentation, servo amplifiers, actuator drives, and sensor conditioners requiring stable component supply across extended temperature and voltage ranges.

Supply support for OP295GPZ 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, automotive, communications, and healthcare markets.

The OP295GPZ belongs to Analog Devices' precision rail-to-rail op amp family, designed specifically for low-power, single-supply systems demanding dc accuracy, robust output drive, and extended temperature operation - not general-purpose amplification.

FAQ

What is the maximum capacitive load the OP295GPZ can drive without instability?

The OP295GPZ is specified stable with capacitive loads exceeding 300 pF, as confirmed in the Rev. G datasheet Figure 17 and General Description section. This allows direct interfacing with power FET gates, coaxial cables, and large ceramic bypass capacitors without external isolation resistors - a key advantage over many CMOS rail-to-rail op amps. The OP295GPZ maintains phase margin >83° under these conditions, ensuring reliable operation in OP295GPZ-based H-bridge and actuator driver designs.

Does the OP295GPZ support true zero-input operation on a 3 V supply?

Yes. The OP295GPZ input common-mode voltage range includes the negative supply rail (V–) across all supply voltages, including 3 V operation. As stated in Table 2, VCM spans 0 V to 2.0 V at 3 V supply - enabling true zero-in functionality. This allows direct connection of grounded sensors (e.g., RTDs, thermocouples) without level-shifting circuitry, preserving signal integrity and simplifying PCB layout in OP295GPZ-based sensor front-ends.

What is the guaranteed output voltage swing for OP295GPZ at 5 V supply and 10 kΩ load?

At VS = 5 V and RL = 10 kΩ to GND, the OP295GPZ guarantees VOH ≥ 4.90 V and VOL ≤ 2 mV, per Table 1 of the Rev. G datasheet. This corresponds to rail-to-rail swing within 100 mV of V+ and 2 mV of V– - delivering usable dynamic range exceeding 4.89 V for 5 V systems. These values are tested over temperature (−40°C to +125°C), ensuring consistent performance in OP295GPZ-based industrial control and instrumentation applications.

Can OP295GPZ operate from a single 3.3 V lithium battery without performance degradation?

Yes. The OP295GPZ is explicitly characterized and specified for 3 V operation (Table 2), with verified parameters including 500 μV max offset voltage, 0–2.0 V input common-mode range, and rail-to-rail output swing down to 0.7 mV above V–. Its 150 μA per amplifier supply current ensures multi-year battery life in intermittent-use devices. All electrical characteristics in the OP295GPZ datasheet Rev. G are validated at 3 V, confirming full functionality in lithium battery-powered applications.

Is OP295GPZ pin-compatible with other dual op amps in SOIC-8 packages?

No. The OP295GPZ uses a nonstandard SOIC-8 pinout: Pins 1–4 are Amp A (OUT/–IN/+IN/V–), while Pins 5–8 are Amp B (+IN/–IN/OUT/V+). This differs from industry-standard dual op amp pinouts (e.g., LM358, TL072) where V+ is Pin 8 and V– is Pin 4. Substituting OP295GPZ into existing layouts requires PCB revision. Always verify pin mapping using Figure 1 in the OP295GPZ datasheet Rev. G before board design or replacement.