Texas Instruments OPA206ADR

Overview

OPA206ADR from Texas Instruments is a single-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-accuracy analog input modules in programmable logic controllers and source measurement units.

For engineers reviewing the OPA206ADR datasheet, OPA206ADR pinout, OPA206ADR application, or OPA206ADR equivalent, this page delivers verified specifications, SOIC-8 package details, real-world use cases in instrumentation and DAQ systems, and two validated alternative parts with functional trade-offs.

Technical Context

The OPA206ADR uses bipolar super-beta inputs and TI's proprietary e-trim™ technology to achieve ultra-low offset and drift without laser trimming. Its input overvoltage protection activates when signals exceed (V–) – 40 V or (V+) + 40 V, clamping input current to ≤10 mA while maintaining integrity of downstream circuitry.

It delivers 3.6-MHz gain-bandwidth, 4-V/µs slew rate, and >124-dB AOL/CMRR/PSRR across –40°C to +125°C, enabling stable operation in wide-supply (±2.25 V to ±18 V) industrial environments with EMI-filtered inputs and overload power limiting.

Key Specifications

Pinout & Package

OPA206ADR is housed in an 8-pin SOIC (D package) with standard dual-opamp footprint but configured as a single amplifier. Pins 1, 5, and 8 are no-connect (NC) and must remain unconnected. The device features isolated power pins (V+ on Pin 7, V– on Pin 4), differential inputs (–IN on Pin 2, +IN on Pin 3), and rail-to-rail output (OUT on Pin 6).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA206ADR, OPA2206DR offers channel integration at the cost of thermal interaction, while OPA205AIDR trades robustness for lower noise-making OPA206ADR the optimal choice for unconditioned field I/O where protection and stability are non-negotiable.

Availability

OPA206ADR is available at Aetrix Electronics and suitable for analog input modules, source measurement units, and digital multimeters requiring stable component supply, long-term calibration retention, and field-deployable ruggedness.

Supply support for OPA206ADR 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 specializing in analog and embedded processing technologies, with decades of heritage in precision amplifiers and industrial-grade signal chain solutions.

The OPA206ADR belongs to TI's e-trim™ precision op amp family, engineered specifically for high-accuracy, low-power, and fault-tolerant analog signal conditioning in harsh industrial and test equipment environments.

FAQ

What is the maximum input overvoltage tolerance of the OPA206ADR?

The OPA206ADR tolerates input voltages up to ±40 V beyond its supply rails - i.e., as low as (V–) – 40 V and as high as (V+) + 40 V - across its full operating temperature range (–40°C to +125°C). This protection operates without latch-up or parameter degradation, and limits input current to ≤10 mA during fault conditions. This specification is confirmed in Section 5.7 and 5.8 of the official SBOSA11E datasheet for OPA206ADR.

Does the OPA206ADR support single-supply operation?

Yes, the OPA206ADR supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range extends from (V–) + 1 V to (V+) – 1.4 V, and its rail-to-rail output swings within 200 mV of both rails at 10-kΩ load - enabling direct interfacing with 3.3-V or 5-V ADCs when powered from a single 5-V or 12-V rail. These capabilities are specified in Sections 5.3 and 5.7 of the OPA206ADR datasheet.

How does the e-trim™ technology in the OPA206ADR improve long-term stability?

The e-trim™ architecture in the OPA206ADR uses on-chip EEPROM-based trimming to set initial offset voltage to ±4 µV (typical) and minimize drift to ±0.08 µV/°C (typical), eliminating sensitivity to mechanical stress, thermal hysteresis, and time-dependent parametric shift. Unlike laser-trimmed parts, e-trim™ retains calibration through reflow and thermal cycling - ensuring <55-µV total offset error over –40°C to +125°C and product lifetime, as validated in Figure 5-4 and Table 5-1 of the OPA206ADR datasheet.

Can the OPA206ADR drive capacitive loads, and what is the recommended isolation resistor?

The OPA206ADR can safely drive up to 30 pF of capacitive load without external compensation, as verified by phase margin ≥67° and overshoot <10% in Figure 5-35 and Figure 5-33 of the datasheet. For loads exceeding 30 pF, TI recommends adding a series isolation resistor (R_ISO) of 25 Ω to 50 Ω between the output and the capacitor - which restores stability while preserving bandwidth and settling behavior, as demonstrated in Figures 5-33 and 5-34 for the OPA206ADR.

What is the typical quiescent current of the OPA206ADR, and how does it vary with supply voltage?

The OPA206ADR draws 220 µA (typical) and 240 µA (max) quiescent current per amplifier at 25°C, with variation less than ±10% across its full supply range (±2.25 V to ±18 V or 4.5 V to 36 V). At –40°C to +125°C, max IQ rises to 310 µA. This low, supply-insensitive current enables consistent power budgeting in multi-channel systems - data confirmed in Section 5.7, Table 5-1, and Figure 5-45 of the OPA206ADR datasheet.