Texas Instruments OPA735AID

Overview

OPA735AID from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier optimized for precision DC-coupled applications requiring ultra-low offset voltage (5 µV max), near-zero drift (0.05 µV/°C max), and rail-to-rail output swing within 50 mV of the rails. It operates from 2.7 V to 12 V single supply or ±1.35 V to ±6 V dual supply and delivers 1.5 V/µs slew rate with 1.6 MHz gain-bandwidth product - ideal for high-accuracy transducer signal conditioning in battery-powered instrumentation.

For engineers reviewing the OPA735AID datasheet, OPA735AID pinout, OPA735AID application, or OPA735AID equivalent, key selection considerations include its non-shutdown SOT23-5 package, absence of enable functionality, low quiescent current (750 µA max), 200 pA max input bias current, and guaranteed −40°C to +85°C operation - all critical for low-power, high-stability analog front-ends in medical sensors and handheld test equipment.

Technical Context

The OPA735AID employs auto-zeroing architecture with a time-continuous 1.6 MHz main amplifier corrected every 100 µs, enabling simultaneous low offset and near-zero drift without chopper noise modulation artifacts. Its input stage uses CMOS topology to achieve 200 pA max input bias current and 10 pF common-mode input capacitance.

It features rail-to-rail output swing (20–50 mV from rails at 10 kΩ load), 115 dB open-loop gain, 130 dB CMRR over (V−) − 0.1 V to (V+) − 1.5 V common-mode range, and stable unity-gain operation - making it suitable for precision buffer, reference buffering, and low-noise sensor amplification without phase reversal risk.

Key Specifications

Pinout & Package

OPA735AID is packaged in an SOIC-8 (D package) with 1.27 mm lead pitch and 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and JEDEC MS-012 AA outline. Pin 1 is located at the index corner with notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA333AIDR and AD8628ARZ, the OPA735AID uniquely balances ultra-low drift (0.05 µV/°C), 12 V operation, and SOIC-8 availability - making it the only option among the three that supports both wide supply range and sub-0.1 µV/°C stability in standard through-hole or surface-mount layouts.

Availability

OPA735AID is available at Aetrix Electronics and suitable for transducer signal conditioning, medical instrumentation, and battery-powered test equipment requiring stable component supply across extended production lifecycles.

Supply support for OPA735AID 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1930.

The OPA735AID belongs to TI's Zerø-Drift Series of operational amplifiers, designed specifically for high-accuracy DC signal chains in instrumentation, industrial sensing, and portable medical devices where long-term offset stability is non-negotiable.

FAQ

What is the maximum operating temperature range for the OPA735AID?

The OPA735AID is specified for operation from −40°C to +85°C, with absolute maximum junction temperature rated at +150°C. This industrial-grade temperature range ensures reliable performance in embedded systems deployed in factory automation, outdoor environmental monitoring, and portable medical diagnostics where ambient conditions vary widely. The device maintains its 5 µV offset and 0.05 µV/°C drift specifications across the full −40°C to +85°C range.

Does the OPA735AID include a shutdown feature?

No, the OPA735AID does not include a shutdown feature. It is the non-shutdown variant of the OPA734/OPA735 family. Shutdown functionality is exclusive to the OPA734 series (e.g., OPA734AIDBVT), which adds an enable pin and reduces quiescent current to 9 µA in standby. The OPA735AID draws 750 µA continuously and has no logic control input - simplifying design for always-on precision applications like sensor front-ends and reference buffers.

What package type is used for the OPA735AID?

The OPA735AID uses the SOIC-8 (D package) with 1.27 mm lead pitch and JEDEC MS-012 AA outline. It is distinct from the SOT23-5 version (OPA735AIDBVT), sharing the same pinout as the OPA734AID but omitting the enable pin. The SOIC-8 package supports through-hole and surface-mount assembly, offers superior thermal dissipation (θ_JA = 150°C/W), and is compatible with standard PCB footprints used for legacy op amps.

Can the OPA735AID drive capacitive loads?

Yes, the OPA735AID is stable driving capacitive loads up to at least 100 pF, as confirmed by typical overshoot vs. capacitive load data in the datasheet. For loads exceeding 100 pF, external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to maintain phase margin. The device's unity-gain stability and internal compensation eliminate need for external compensation networks in most sensor interface and ADC driver configurations using the OPA735AID.

What is the input common-mode voltage range of the OPA735AID?

The OPA735AID input common-mode voltage range is (V−) − 0.1 V to (V+) − 1.5 V. At ±5 V supplies, this spans −5.1 V to +3.5 V; at 3.3 V single supply (V− = 0 V), it is 0.1 V to 1.8 V. This asymmetric range reflects the CMOS input stage design and requires careful biasing - for example, in single-supply bridge amplifiers, the input must be biased above ground to stay within valid common-mode limits and preserve 130 dB CMRR.