Analog Devices Inc. OP490GPZ

Overview

OP490GPZ from Analog Devices is a low-voltage, micropower quad operational amplifier designed for precision signal conditioning in space- and power-constrained systems. It operates from 1.6 V to 36 V single supply or ±0.8 V to ±18 V dual supply, delivers ≤1.0 mV input offset voltage, draws ≤80 μA total quiescent current, and supports rail-to-rail output swing down to ground - enabling zero-in/zero-out operation in battery-powered portable instruments and remote sensors.

For engineers reviewing the OP490GPZ datasheet, OP490GPZ pinout, OP490GPZ application, or OP490GPZ equivalent, key selection criteria include micropower consumption (<80 μA), ground-sensing input range, output drive capability (≥5 mA), wide supply flexibility, and industry-standard 14-lead PDIP pinout compatibility with legacy designs.

Technical Context

The OP490GPZ uses a PNP-input stage with series protection resistors, enabling ±20 V input overvoltage tolerance beyond supply rails. Its open-loop gain exceeds 400 V/mV at ±15 V supply and remains >100 V/mV even at 1.6 V single supply, supporting stable closed-loop performance across ultra-low-voltage operation.

Each of the four amplifiers features independent high CMRR (>90 dB), low PSRR (≤10 μV/V), and 20 kHz gain-bandwidth product - allowing simultaneous use in mixed-signal subsystems such as programmable-gain stages, DAC buffers, and micropower oscillators without crosstalk degradation.

Key Specifications

Pinout & Package

OP490GPZ is housed in a 14-lead plastic dual in-line package (PDIP_N, N-14, P-suffix), compliant with JEDEC MS-001, with 0.300-inch body width and 0.100-inch lead pitch. The package is RoHS-compliant (Z-suffix) and rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad operational amplifier applications.

Compared with LM324ARZ and AD8604ARUZ, OP490GPZ uniquely balances sub-100 μA quiescent current, guaranteed ground-sensing input, and <1 mV offset - making it the only option among the three viable for decade-long deployments in energy-harvested sensor nodes.

Availability

OP490GPZ is available at Aetrix Electronics and suitable for portable medical sensors, lithium-powered data loggers, micropower oscillator circuits, and quad programmable-gain instrumentation requiring stable component supply across long production lifecycles.

Supply support for OP490GPZ 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, headquartered in Norwood, MA, with design and manufacturing operations worldwide.

The OP490GPZ belongs to Analog Devices' precision micropower op amp product line, engineered specifically for ultra-low-power, wide-supply, ground-referenced signal conditioning in battery- and energy-harvesting–powered systems.

FAQ

What is the maximum operating supply voltage for OP490GPZ?

The OP490GPZ supports a maximum supply voltage of ±18 V for dual-supply operation or 36 V for single-supply operation, as specified in its Absolute Maximum Ratings table. Exceeding these limits risks permanent damage. Operation at ±15 V or 5 V single supply is typical in validated applications such as portable instrumentation and remote sensors, where the OP490GPZ maintains full parameter compliance including input offset voltage ≤1.0 mV and supply current ≤80 μA.

Does OP490GPZ support true single-supply operation with input and output down to ground?

Yes, OP490GPZ supports true single-supply operation: its input common-mode voltage range includes the negative rail (V−), and its output can swing to within 100 μV of ground with a 10 kΩ load. This enables zero-in/zero-out functionality without level-shifting circuitry. The OP490GPZ datasheet confirms this behavior across −40°C to +85°C, making it suitable for direct interfacing with ground-referenced transducers and 0–V_CC ADCs in battery-powered systems.

What is the guaranteed input offset voltage specification for OP490GPZ over temperature?

The OP490GPZ guarantees an input offset voltage of ≤1.5 mV maximum over the full operating temperature range of −40°C to +85°C, as documented in Table 2 of the Rev. E datasheet. At 25°C, the limit is tighter: ≤1.0 mV max. This performance, combined with a typical drift of 4 μV/°C, ensures predictable error contribution in precision DC-coupled amplifiers - critical for applications like medical sensor front-ends where the OP490GPZ is commonly deployed.

Can OP490GPZ drive capacitive loads, and what is the maximum stable value?

Yes, OP490GPZ is stable driving capacitive loads up to 650 pF with unity-gain configuration (AV = 1), as verified in the Electrical Characteristics table. This capability supports direct connection to long PCB traces, shielded cables, or ADC input capacitance without external isolation resistors. For loads exceeding 650 pF, a series resistor (typically 10–100 Ω) between OP490GPZ output and the capacitive node restores stability - a technique validated in application circuits like the micropower VCO (Figure 22) and DAC buffer (Figure 23) in the OP490GPZ datasheet.

Is OP490GPZ pin-compatible with standard quad op amp footprints?

Yes, OP490GPZ uses the industry-standard 14-lead PDIP pinout defined for quad op amps (e.g., LM324, TL084), with OUT A on pin 1, V+ on pin 4, OUT B on pin 7, OUT C on pin 8, V− on pin 11, and OUT D on pin 14. This allows drop-in replacement in existing designs using through-hole layouts. However, designers must verify that the lower supply current and improved offset of OP490GPZ do not interact unexpectedly with legacy compensation networks originally sized for higher-power predecessors.