Texas Instruments OPA2206ADR

Overview

OPA2206ADR from Texas Instruments is a dual-channel, precision e-trim™ operational amplifier with integrated ±40-V input overvoltage protection beyond supplies, 25-µV max offset voltage, ±0.5-µV/°C max drift, 500-pA max input bias current, and rail-to-rail output - designed for high-density analog input modules in programmable logic controllers and source measurement units.

For engineers reviewing the OPA2206ADR datasheet, OPA2206ADR pinout, OPA2206ADR application, or OPA2206ADR equivalent, this page delivers verified specifications, SOIC-8 pin mapping, real-world use cases in instrumentation and data acquisition, and two validated alternative parts with technical and application-level distinctions.

Technical Context

The OPA2206ADR implements super-beta bipolar input transistors with TI's proprietary e-trim™ technology to achieve ultra-low offset and drift, while its internal input overvoltage protection circuitry clamps fault currents up to ±40 V beyond supply rails without external components. It operates across ±2.25 V to ±18 V dual supplies (or 4.5 V to 36 V single supply) and maintains >124 dB AOL, CMRR, and PSRR over –40°C to +125°C.

This device delivers 3.6-MHz gain-bandwidth and 4-V/µs slew rate at only 240 µA max quiescent current per amplifier, enabling high-precision signal conditioning in low-power, space-constrained industrial systems where input robustness and dc accuracy are critical.

Key Specifications

Pinout & Package

OPA2206ADR is packaged in an 8-pin SOIC (D package), pin-compatible with industry-standard dual op-amp footprints and suitable for automated assembly on industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision operational amplifier applications.

Compared with OPA2205DR and AD8638ARZ-REEL, the OPA2206ADR uniquely combines ±40-V input protection, <0.5-µV/°C drift, and dual-channel integration in SOIC-8 - making it the only option that simultaneously satisfies field I/O ruggedness, metrology-grade stability, and space-constrained dual-signal-path requirements.

Availability

OPA2206ADR is available at Aetrix Electronics and suitable for analog input modules, source measurement units, and digital multimeters requiring stable component supply, long-term calibration integrity, and industrial-grade fault resilience.

Supply support for OPA2206ADR 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 leader delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The OPAx206 family was engineered to extend the legacy OPAx277 precision op-amp platform with integrated input overvoltage protection - targeting high-reliability analog signal chains in programmable logic controllers, test equipment, and energy infrastructure.

FAQ

What is the maximum input overvoltage protection level supported by the OPA2206ADR?

The OPA2206ADR provides integrated input overvoltage protection up to ±40 V beyond either supply rail - meaning it safely withstands input voltages from (V–) – 40 V to (V+) + 40 V across its full operating temperature range (–40°C to +125°C). This eliminates external protection components in analog input modules. The OPA2206ADR's internal clamping structure limits fault current to 4.8–10 mA during overvoltage events, preserving amplifier functionality without latch-up.

Does the OPA2206ADR support rail-to-rail output swing under all load conditions?

Yes, the OPA2206ADR delivers rail-to-rail output swing - specifically, within 200 mV of each supply rail at 10-kΩ load and 25°C - while maintaining AOL > 126 dB. At –40°C to +125°C and 10-kΩ load, output swing remains (V–) + 0.2 V to (V+) – 0.2 V. Under 2-kΩ load, swing degrades slightly to (V–) + 0.35 V to (V+) – 0.35 V. This behavior is guaranteed in the datasheet and enables direct interfacing with 16-bit SAR ADCs using 5-V references.

How does the OPA2206ADR's e-trim™ technology improve long-term stability compared to laser-trimmed op-amps?

The OPA2206ADR uses TI's e-trim™ process - a post-package electrical trimming method - to achieve ±4 µV typical offset and ±0.08 µV/°C typical drift. Unlike laser trimming, e-trim™ avoids mechanical stress-induced drift and offers superior time stability: offset shift is limited to ±0.1 µV after 1000 hours of life testing. This translates to <0.001% gain error drift over 10 years in fixed-gain instrumentation amplifiers - critical for unattended field-deployed DAQ systems where recalibration intervals exceed 24 months.

Can the OPA2206ADR drive capacitive loads without instability, and what is the recommended isolation resistor value?

The OPA2206ADR maintains stability into capacitive loads up to 100 pF with no external compensation. For loads >100 pF, a series isolation resistor (R_ISO) of 25 Ω to 50 Ω is recommended - as validated in Figure 5-33 and Figure 5-34 of the datasheet. With R_ISO = 50 Ω, phase margin remains ≥60° even at 1000-pF load. This capability simplifies driving ADC input filters and long cables in lab instrumentation, eliminating the need for complex compensation networks that degrade noise performance.

What is the quiescent current specification for the OPA2206ADR across its full operating temperature range?

The OPA2206ADR draws 220–240 µA per amplifier at 25°C and up to 310 µA per amplifier over the full –40°C to +125°C range - measured at zero output current and nominal supply. This low, well-characterized IQ enables dual-channel precision amplification in thermally constrained enclosures and battery-backed portable instruments. Quiescent current variation with supply voltage is minimal: Figure 5-45 shows <5% change from 4.5 V to 36 V single supply, ensuring predictable power budgeting across diverse industrial power architectures.