Analog Devices Inc. AD8601ARTZ-R2

Overview

AD8601ARTZ-R2 from Analog Devices is a precision CMOS single-supply rail-to-rail input/output operational amplifier in a 5-lead SOT-23 package. It delivers 8 MHz gain bandwidth, 5 V/µs slew rate, 500 µV max offset voltage, 750 µA supply current, and operates from 2.7 V to 5.5 V - enabling high-accuracy signal conditioning in battery-powered instrumentation and sensor interfaces.

For engineers reviewing the AD8601ARTZ-R2 datasheet, AD8601ARTZ-R2 pinout, AD8601ARTZ-R2 application, or AD8601ARTZ-R2 equivalent, key selection criteria include rail-to-rail I/O swing at low supply voltage, sub-1 nA input bias current, unity-gain stability, and automotive-grade temperature range (−40°C to +125°C) without requiring external compensation.

Technical Context

The AD8601ARTZ-R2 uses Analog Devices' DigiTrim® post-package trimming to achieve low offset voltage (≤500 µV) without laser trimming, correcting mechanical stress-induced errors in the 5-lead SOT-23 package. Its dual-input-stage architecture - parallel NMOS and PMOS differential pairs - enables true rail-to-rail common-mode input range (0 V to V_S) and seamless transition across the full supply.

Output stage employs complementary NMOS/PMOS common-source configuration for rail-to-rail swing: at 1 mA load, output reaches within 20 mV of V_S and 15 mV of GND. Open-loop gain is 80 dB typical (RL = 2 kΩ), with phase margin of 50°–55° ensuring stable unity-gain operation.

Key Specifications

Pinout & Package

AD8601ARTZ-R2 is housed in a 5-lead SOT-23 (RJ suffix) package with 1.6 mm × 1.6 mm footprint and 0.95 mm height - optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP6001T-E/OT and OPA333AIDBVR, AD8601ARTZ-R2 uniquely balances 8 MHz bandwidth, 500 µV offset, rail-to-rail I/O, and automotive temperature rating in a 5-lead SOT-23 - making it optimal for space-constrained, mixed-signal applications demanding both precision and speed.

Availability

AD8601ARTZ-R2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable audio systems, and industrial sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD8601ARTZ-R2 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 AD860x family was designed specifically for precision, low-voltage, single-supply applications - including portable instrumentation, automotive sensors, and high-fidelity audio - where rail-to-rail operation, low power, and guaranteed performance over temperature are essential.

FAQ

What is the maximum operating supply voltage for AD8601ARTZ-R2?

The absolute maximum supply voltage for AD8601ARTZ-R2 is 6 V, but the recommended operating range is 2.7 V to 5.5 V per the datasheet. Operation above 5.5 V risks permanent damage, while operation below 2.7 V may cause degraded rail-to-rail output swing and increased input offset voltage. The AD8601ARTZ-R2 is fully specified at 3 V and 5 V supplies, with performance validated across the entire −40°C to +125°C temperature range.

Does AD8601ARTZ-R2 support rail-to-rail input with a 3.3 V supply?

Yes, AD8601ARTZ-R2 supports true rail-to-rail input common-mode range from 0 V to V_S at 3.3 V supply. Its dual-input-stage architecture - combining NMOS and PMOS differential pairs - ensures continuous operation across the full supply range without phase reversal or discontinuity. Input offset voltage remains within 750 µV max over 0 V to 3.3 V common-mode, and CMRR exceeds 68 dB, making AD8601ARTZ-R2 ideal for interfacing with 3.3 V ADCs and ASICs.

Can AD8601ARTZ-R2 drive a 600 Ω audio load directly?

Yes, AD8601ARTZ-R2 can drive a 600 Ω load directly with ≤0.1% THD+N at 10 kHz and 1 V_PP output, as verified in Figure 38 of the datasheet. At 5 V supply, it delivers ±50 mA output current and maintains rail-to-rail swing into 600 Ω with <30 mV headroom. For sustained 600 Ω operation, ensure PCB layout minimizes thermal resistance - the SOT-23 package has θ_JA = 190°C/W - and verify junction temperature stays below 125°C under worst-case ambient and power dissipation.

Is AD8601ARTZ-R2 pin-compatible with other SOT-23-5 op amps?

AD8601ARTZ-R2 follows the industry-standard SOT-23-5 op amp pinout: Pin 1 = OUT, Pin 2 = V−, Pin 3 = +IN, Pin 4 = −IN, Pin 5 = V+. This matches common equivalents like MCP6001, TS912, and OPA340. However, electrical behavior differs significantly - AD8601ARTZ-R2 offers higher bandwidth (8.4 MHz vs. 1 MHz), lower offset (500 µV vs. 1.5–3 mV), and guaranteed automotive temperature rating. Always verify loop stability and supply current compatibility before substitution.

What is the typical input bias current of AD8601ARTZ-R2 at 85°C?

The typical input bias current of AD8601ARTZ-R2 is 25 pA at −40°C to +85°C (Table 1, IB row), rising to 100 pA at +125°C. At room temperature (25°C), it is 0.2 pA typical. This ultra-low bias enables use with high-impedance sources such as photodiodes, piezoelectric sensors, and pH electrodes without significant DC error. The AD8601ARTZ-R2 maintains sub-100 pA bias across its full industrial temperature range, supporting precision measurement in harsh environments.