Analog Devices Inc. ADA4062-2ARZ-R7

Overview

ADA4062-2ARZ-R7 from Analog Devices is a dual JFET-input operational amplifier optimized for low-power, high-precision signal conditioning in industrial and instrumentation systems. It delivers 50 pA max input bias current, 1.5 mV max offset voltage (B grade), 3.3 V/μs slew rate, ±5 V to ±15 V dual-supply operation, and operates across −40°C to +125°C - enabling use in body probe electronics and active filters where ultralow input current and rail-to-rail output swing are critical.

For engineers reviewing the ADA4062-2ARZ-R7 datasheet, ADA4062-2ARZ-R7 pinout, ADA4062-2ARZ-R7 application, or ADA4062-2ARZ-R7 equivalent, key selection criteria include its 165 μA per amplifier supply current, 10 TΩ input resistance, 5 μV/°C offset drift, unity-gain stability, and SOIC-8 packaging with verified pin compatibility for drop-in replacement in legacy JFET op amp designs.

Technical Context

The ADA4062-2ARZ-R7 implements a JFET-input front-end with complementary-pair input stage architecture, delivering ultralow input bias current and high common-mode rejection (90 dB typical). Its internal compensation ensures unity-gain stability without external components, supporting direct use in transimpedance, integrator, and high-impedance buffer configurations.

Designed for extended industrial temperature operation, it maintains specified performance across −40°C to +125°C with guaranteed parameters including 1.5 mV max V_OS (B grade), 5 μV/°C max ∆V_OS/∆T, and 1.4 MHz gain-bandwidth product - making it suitable for precision analog signal chains where thermal drift and power efficiency are tightly constrained.

Key Specifications

Pinout & Package

ADA4062-2ARZ-R7 is packaged in an 8-lead narrow-body SOIC (R-8) compliant with JEDEC MS-012-AA, with exposed pad not present. Pin 1 is marked by a notch or dot; the device uses standard SOIC lead pitch (1.27 mm) and body dimensions (5.00 mm × 4.00 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8642ARMZ and TL072CDR, the ADA4062-2ARZ-R7 uniquely balances ultralow power (165 μA), precision (1.5 mV V_OS), and extended temperature capability (−40°C to +125°C) in a JFET-input architecture - making it optimal for battery-operated instrumentation and harsh-environment signal conditioning where all three attributes are simultaneously required.

Availability

ADA4062-2ARZ-R7 is available at Aetrix Electronics and suitable for active filters, body probe electronics, power controls and monitoring, industrial process controls, and data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADA4062-2ARZ-R7 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 Wilmington, MA.

The ADA4062 family was designed specifically for micropower, high-precision instrumentation applications demanding ultralow input bias current, wide temperature operation, and rail-compatible output swing - targeting medical sensors, industrial process controllers, and portable test equipment.

FAQ

What is the maximum input common-mode voltage range for ADA4062-2ARZ-R7?

The ADA4062-2ARZ-R7 supports an input common-mode voltage range of −11.5 V to +15 V when operated on ±15 V supplies. This allows high-side sensing up to the positive rail and accommodates signals exceeding the negative rail by up to 3.5 V - critical for applications like motor current monitoring and sensor interfaces with asymmetric signal swings.

Does ADA4062-2ARZ-R7 exhibit phase reversal, and how is it mitigated?

ADA4062-2ARZ-R7 does not phase-reverse when inputs exceed the common-mode range but remain within the supply rails (i.e., ≤ +15 V and ≥ −14.5 V on ±15 V supplies). Phase reversal occurs only if the input drops below −14.5 V, due to gate-drain diode conduction. Mitigation requires external Schottky clamping diodes between inputs, as documented in the datasheet's Figure 63.

What is the guaranteed offset voltage specification for ADA4062-2ARZ-R7?

The ADA4062-2ARZ-R7 is a B-grade device with a guaranteed maximum input offset voltage of 1.5 mV at 25°C and 3 mV across the full −40°C to +125°C operating temperature range. This specification applies exclusively to the 8-lead SOIC package variant and is tighter than the A-grade (2.5 mV max) offered in other packages.

Can ADA4062-2ARZ-R7 drive capacitive loads directly, and what is the stability limit?

ADA4062-2ARZ-R7 is unity-gain stable and can drive up to 100 pF capacitive loads without external compensation, as verified in Figure 31 and Figure 34 of the datasheet. For loads >100 pF, a series resistor (typically 10–100 Ω) should be placed between the output and capacitance to maintain phase margin >78° and prevent peaking or oscillation.

Is ADA4062-2ARZ-R7 RoHS-compliant and lead-free?

Yes, ADA4062-2ARZ-R7 is RoHS-compliant and lead-free, as confirmed in the Ordering Guide (Page 20) and Outline Dimensions section of the datasheet. The SOIC-8 package (R-8) uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements for standard reflow assembly.