Analog Devices Inc. AD8626ARZ-REEL7

Overview

AD8626ARZ-REEL7 from Analog Devices is a dual-channel, precision JFET-input operational amplifier optimized for low-power, single-supply operation (5 V to 26 V) and rail-to-rail output swing. It delivers 5 MHz gain bandwidth, 5 V/µs slew rate, and 500 µV max input offset voltage across –40°C to +85°C, enabling high-fidelity signal conditioning in photodiode preamplifiers and DAC output buffers.

For engineers reviewing the AD8626ARZ-REEL7 datasheet, AD8626ARZ-REEL7 pinout, AD8626ARZ-REEL7 application, or AD8626ARZ-REEL7 equivalent, key selection criteria include its 1 pA max input bias current, 630 µA/amp supply current, rail-to-rail output capability down to 5 mV of rails at 2 mA load, and dual SOIC-8 package compatibility with industrial instrumentation and battery-powered sensor interfaces.

Technical Context

The AD8626ARZ-REEL7 employs n-channel JFET input transistors to achieve ultra-low input bias current (≤1 pA) and high input impedance (>10¹² Ω), supporting precision DC-coupled applications with high source impedances. Its bipolar rail-to-rail output stage maintains <5 mV saturation voltage at ±2 mA loads under 5 V supply.

It features unity-gain stability, no phase reversal, and operates over full industrial temperature range (–40°C to +85°C). Input common-mode range extends 0.2 V below V– and 2 V below V+, while CMRR exceeds 87 dB at 25°C and PSRR reaches 104 dB - critical for noise-sensitive analog front-ends.

Key Specifications

Pinout & Package

AD8626ARZ-REEL7 is packaged in an 8-lead SOIC (R-8 suffix), RoHS-compliant, tape-and-reel format. The package has standard SOIC footprint (5.3 mm × 6.2 mm, 1.27 mm pitch) and thermal resistance θ_JA = 158°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2134PA and ADA4625-2ARZ, AD8626ARZ-REEL7 uniquely balances ultra-low input current (1 pA), low quiescent power (1.26 mA total), rail-to-rail output, and 5 V single-supply compatibility - making it the optimal choice for space-constrained, battery-aware precision analog designs where DC accuracy and power efficiency are co-primary requirements.

Availability

AD8626ARZ-REEL7 is available at Aetrix Electronics and suitable for photodiode amplifiers, DAC output buffers, and precision active filters requiring stable component supply, long-term manufacturability, and guaranteed industrial temperature performance.

Supply support for AD8626ARZ-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 AD862x family was designed specifically for precision, low-power, single-supply signal conditioning in instrumentation, sensor interfaces, and portable measurement equipment - emphasizing JFET input integrity, rail-to-rail output, and industrial reliability.

FAQ

What is the maximum capacitive load the AD8626ARZ-REEL7 can drive without instability?

The AD8626ARZ-REEL7 is specified to remain stable with capacitive loads exceeding 500 pF, as confirmed in the datasheet's Typical Performance Characteristics (Figure 31–32). This allows direct connection to anti-aliasing filters or long PCB traces without external isolation resistors - a key advantage over older JFET op amps that require compensation networks for loads >100 pF. For loads >1 nF, adding a 10–50 Ω series resistor at the output improves phase margin while preserving DC accuracy.

Does the AD8626ARZ-REEL7 support true rail-to-rail input operation?

The AD8626ARZ-REEL7 does not support rail-to-rail input; its input common-mode voltage range extends from 0.2 V below V– to 2 V below V+. This means at 5 V supply, inputs must stay within 0 V to +3 V to avoid increased offset error and bandwidth loss (per Figure 15). However, its rail-to-rail output (within 5 mV of rails at ±2 mA) makes it ideal for buffering DACs and ASICs with wide output swings in single-supply systems.

Can the AD8626ARZ-REEL7 be used in automotive cabin temperature sensing applications?

Yes - the AD8626ARZ-REEL7 is fully specified over the industrial temperature range (–40°C to +85°C), matching typical automotive cabin operating conditions. Its low offset drift (2.5 µV/°C), high CMRR (≥87 dB), and immunity to phase reversal make it suitable for conditioning signals from NTC thermistors or RTDs in HVAC control modules, provided the PCB layout follows low-leakage practices for picoamp-level bias current integrity.

What is the recommended minimum load resistance to maintain specified output swing?

To maintain rail-to-rail output swing within 5 mV of the supply rails, the AD8626ARZ-REEL7 should drive loads ≥1 kΩ. At 600 Ω (Figure 18), output saturation voltage increases to ~75 mV from each rail under 2 mA load. For applications requiring full swing into lower impedances, consider paralleling channels or using a dedicated output buffer - but note that heavy loading also raises junction temperature, increasing input bias current per Figure 8.

How does the AD8626ARZ-REEL7 compare to the AD8627 in photodiode applications?

The AD8626ARZ-REEL7 offers dual-channel functionality in SOIC-8, while the AD8627 is single-channel in SC70-5 or SOIC-8. Both share identical electrical specs (1 pA IB, 500 µV V_OS, 5 MHz GBW), but AD8626ARZ-REEL7 enables dual-path photodiode arrays or differential transimpedance topologies in same board area as one AD8627. Its channel separation >104 dB at 1 kHz prevents crosstalk in multi-sensor systems - a distinct advantage over using two discrete AD8627s.