Texas Instruments OPA2211AIDRGR

Overview

OPA2211AIDRGR from Texas Instruments is a dual-channel, precision operational amplifier optimized for low-noise, high-speed data acquisition and precision signal conditioning. It delivers 1.1 nV/√Hz input voltage noise at 1 kHz, 700 ns 16-bit settling time over 10-V output swing, and rail-to-rail output with ±2.25 V to ±18 V supply range - enabling high-fidelity analog front-ends in ultrasound scanners and semiconductor test equipment.

For engineers reviewing the OPA2211AIDRGR datasheet, OPA2211AIDRGR pinout, OPA2211AIDRGR application, or OPA2211AIDRGR equivalent, key selection criteria include its 1.1-nV/√Hz noise floor, dual-channel SON-8 thermal performance (R_θJB = 28.8 °C/W), shutdown functionality, and guaranteed 125 μV max offset voltage across –40°C to +125°C.

Technical Context

The OPA2211AIDRGR implements a fully differential, unity-gain-stable architecture with internal compensation, supporting gain configurations from G = 1 to G = 100 while maintaining phase margin >60°. Its bipolar input stage enables ultra-low voltage noise without sacrificing input bias current (±60 nA typ), and the integrated shutdown pin (active-high, 2 µs turn-on) allows dynamic power management in multi-channel systems.

Designed for precision DC-coupled signal chains, it features 114 dB min open-loop gain (RL = 10 kΩ), 120 dB CMRR over full temperature range, and robust capacitive load drive up to 100 pF - making it suitable as a loop filter amplifier in PLLs and as a buffer for 16-bit ADCs/DACs where 0.0015% (16-bit) settling accuracy is required.

Key Specifications

Pinout & Package

OPA2211AIDRGR is housed in an 8-pin SON package (3 mm × 3 mm) with exposed thermal pad, optimized for low thermal resistance (R_θJB = 28.8 °C/W). The thermal pad must be soldered to PCB ground/V– plane for specified performance and reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2189IDR and ADA4898-2ARMZ, OPA2211AIDRGR uniquely balances ultra-low noise (1.1 nV/√Hz), fast 16-bit settling (700 ns), and industrial temperature support (–40°C to +125°C) in a thermally enhanced SON-8 package - making it optimal for mixed-signal test and medical imaging systems requiring both fidelity and reliability.

Availability

OPA2211AIDRGR is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, semiconductor automatic test equipment (ATE), and X-ray detector signal chains requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for OPA2211AIDRGR 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 amplifiers, data converters, and power management ICs.

The OPAx211 product line was designed specifically for high-resolution data acquisition systems demanding ultra-low noise, fast settling, and rail-to-rail output - targeting medical imaging, test & measurement, and industrial instrumentation.

FAQ

What is the maximum allowable supply voltage for OPA2211AIDRGR?

The OPA2211AIDRGR supports a total supply voltage (V+ to V–) up to 40 V, with recommended operating range from ±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single). Absolute maximum ratings specify VS ≤ 40 V; exceeding this risks permanent damage. Operation at ±18 V is validated across –40°C to +125°C with full electrical specifications met.

Does OPA2211AIDRGR support rail-to-rail input?

No, OPA2211AIDRGR does not support rail-to-rail input. Its common-mode input voltage range is (V–) + 1.8 V to (V+) – 1.4 V for VS ≥ ±5 V. This limitation requires careful level-shifting in single-supply configurations where input signals approach the rails, though its rail-to-rail output remains fully functional.

How does the shutdown function operate on OPA2211AIDRGR?

The shutdown pin (Pin 8) is active-high: device enables when V_SHUTDOWN ≤ (V+) – 3 V, and disables when V_SHUTDOWN ≥ (V+) – 0.35 V. Turn-on time is 2 μs, turn-off time is 3 μs, and shutdown current is ≤20 μA. During shutdown, outputs enter high-impedance state - critical for multiplexed sensor arrays where channel isolation is required.

What thermal considerations apply to OPA2211AIDRGR in the DRG (SON-8) package?

For OPA2211AIDRGR in SON-8 (DRG), the exposed thermal pad must be soldered to a PCB copper area connected to V–. This achieves R_θJB = 28.8 °C/W (junction-to-board), essential for maintaining 125°C max junction temperature at 3.6 mA/channel quiescent current. Without proper pad connection, thermal performance degrades significantly, risking parametric shift or failure.

Is OPA2211AIDRGR suitable for driving ADC inputs in 16-bit DAQ systems?

Yes, OPA2211AIDRGR is explicitly characterized for this role: it achieves 700 ns 16-bit settling (±1/2 LSB = ±0.00075%) over 10-V output swings, with 125 μV max offset and 0.35 μV/°C drift ensuring DC accuracy. Its 1.1-nV/√Hz noise and 45 MHz GBW preserve SNR and bandwidth into modern SAR and sigma-delta ADCs - confirmed in TI's application notes for precision DAQ reference designs.