Analog Devices Inc. ADA4062-4ARUZ

Overview

ADA4062-4ARUZ from Analog Devices is a quad JFET-input operational amplifier optimized for low-power, high-precision signal conditioning in industrial and instrumentation systems. It delivers 50 pA maximum input bias current, 1.4 MHz gain bandwidth, ±15 V dual-supply operation, and −40°C to +125°C extended temperature range - enabling use in high-impedance sensor buffering and micropower active filtering.

For engineers reviewing the ADA4062-4ARUZ datasheet, ADA4062-4ARUZ pinout, ADA4062-4ARUZ application, or ADA4062-4ARUZ equivalent, key selection criteria include ultralow input bias current (2 pA typical), rail-to-rail output swing capability (±13.5 V/±13.8 V), 5 μV/°C offset drift, unity-gain stability, and TSSOP-14 package compatibility with space-constrained PCB layouts.

Technical Context

The ADA4062-4ARUZ employs a JFET-input stage delivering 10 TΩ input resistance and 1.5 pF differential input capacitance, supporting high-impedance source interfacing without signal degradation. Its fully differential architecture enables 130 dB channel separation at 1 kHz, minimizing crosstalk in multi-channel data acquisition.

Internally compensated for unity-gain stability, it achieves 78° phase margin with 10 kΩ load and 100 pF capacitance, while maintaining 3.3 V/μs slew rate and 0.1% settling time of 3.5 μs - suitable for precision DC-coupled amplification and low-distortion AC signal paths.

Key Specifications

Pinout & Package

ADA4062-4ARUZ is housed in a 14-lead TSSOP (RU-14) package with exposed pad connected to V– for thermal and noise performance. Pin 1 is marked with a dot; exposed pad must be soldered to PCB ground plane per JEDEC MO-153-AB-1 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8644ARUZ and TL074CDR, ADA4062-4ARUZ uniquely balances ultralow bias current (2 pA), extended temperature rating (−40°C to +125°C), and micropower operation (165 μA/amplifier) - making it the sole option qualified for high-reliability, high-impedance industrial sensor nodes.

Availability

ADA4062-4ARUZ is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and power monitoring systems requiring stable component supply across long production lifecycles.

Supply support for ADA4062-4ARUZ 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 Wilmington, MA.

The ADA4062 family targets precision, low-power signal conditioning in harsh environments - designed specifically for sensor interfacing, instrumentation, and industrial control where input bias current, temperature stability, and supply efficiency are critical.

FAQ

What is the maximum input common-mode voltage range for ADA4062-4ARUZ?

The ADA4062-4ARUZ supports an input common-mode voltage range of −11.5 V to +15 V with ±15 V supplies. This includes the positive rail, enabling high-side sensing without level shifting. At ±5 V supplies, the range is −3.5 V to +5 V. Operation beyond these limits risks phase reversal only below −14.5 V (i.e., 0.5 V above V−), as confirmed in the Phase Reversal section of the Rev. B datasheet.

Does ADA4062-4ARUZ require external compensation for unity-gain stability?

No, ADA4062-4ARUZ is internally compensated and unity-gain stable. It maintains 78° phase margin with 10 kΩ load and 100 pF capacitive load, as verified in Figure 23 and Figure 26 of the Rev. B datasheet. No external compensation components are needed for gains ≥1, simplifying design in buffer and gain-of-1 configurations.

What is the thermal resistance (θJA) of the ADA4062-4ARUZ in its TSSOP-14 package?

The ADA4062-4ARUZ in 14-lead TSSOP (RU-14) has a junction-to-ambient thermal resistance (θJA) of 112°C/W, measured on a standard 4-layer PCB per JEDEC standards. This value assumes proper thermal via placement under the exposed pad, which must be connected to V− for optimal heat dissipation and noise performance.

Can ADA4062-4ARUZ drive capacitive loads greater than 100 pF?

ADA4062-4ARUZ is characterized for stability with up to 100 pF capacitive load at unity gain. Driving larger capacitive loads may cause peaking or oscillation. For loads >100 pF, isolation resistors (e.g., 10–100 Ω in series with output) or gain >1 configurations are recommended - as detailed in Figure 31 and Figure 34 of the Rev. B datasheet showing overshoot vs. CL.

Is the exposed pad on ADA4062-4ARUZ electrically connected, and how should it be handled?

Yes, the exposed pad on ADA4062-4ARUZ is electrically connected to V− and must be soldered to a PCB copper pour tied to the negative supply plane. Per Figure 4 and Note 2 in the Rev. B datasheet, this connection improves thermal performance (θJC = 35°C/W), reduces noise, and stabilizes output impedance. Leaving it floating degrades PSRR and thermal reliability.