Texas Instruments OPA211AIDRGTG4

Overview

OPA211AIDRGTG4 from Texas Instruments is a dual-channel, precision operational amplifier with 1.1 nV/√Hz input voltage noise density at 1 kHz, 80 MHz gain-bandwidth product (G = 100), 27 V/μs slew rate, and rail-to-rail output swing. It operates from ±2.25 V to ±18 V supplies and delivers 700 ns 16-bit settling time across 10-V output swings-enabling high-fidelity signal conditioning in precision data acquisition systems.

For engineers reviewing the OPA211AIDRGTG4 datasheet, OPA211AIDRGTG4 pinout, OPA211AIDRGTG4 application, or OPA211AIDRGTG4 equivalent, key selection criteria include ultra-low noise performance for sensor front-ends, low offset drift (0.35 μV/°C) for stable DC accuracy over temperature, shutdown functionality for power-sensitive instrumentation, and SON-8 package compatibility with space-constrained PCB layouts.

Technical Context

The OPA211AIDRGTG4 implements a fully differential, high-speed precision op-amp architecture optimized for low-noise closed-loop applications such as PLL loop filters and ADC driver stages. Its internal design supports unity-gain stability while maintaining 45 MHz bandwidth at G = 1 and 80 MHz at G = 100.

It features active shutdown control (pin 8), dual independent amplifiers sharing common supply rails, and an exposed thermal pad connected to V– for enhanced thermal dissipation-critical for maintaining specified noise and distortion performance under continuous operation.

Key Specifications

Pinout & Package

OPA211AIDRGTG4 is packaged in an 8-pin SON (Small Outline No-lead) with 3 mm × 3 mm body size and exposed thermal pad on underside. The thermal pad must be soldered to V– plane for thermal and electrical performance compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA211AIDRGTG4, OPA211AIDRG offers identical performance in a non-green package, while ADA4898-2ARMZ trades shutdown capability and lower supply current (3.6 mA vs 12 mA) for higher speed and marginally lower noise-making it less suitable for battery-powered, thermally constrained, or safety-critical precision DAQ systems.

Availability

OPA211AIDRGTG4 is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, semiconductor test instrumentation, and high-resolution data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for OPA211AIDRGTG4 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 expertise in precision signal chain solutions.

The OPAx211 series was designed specifically for high-fidelity, low-noise precision amplification in demanding applications including medical imaging, test & measurement, and industrial DAQ-where nanovolt-level resolution and thermal stability are non-negotiable.

FAQ

What is the maximum operating temperature range for the OPA211AIDRGTG4?

The OPA211AIDRGTG4 is specified from –40°C to +125°C ambient temperature. This industrial-grade rating ensures reliable operation in harsh environments such as factory-floor test equipment, automotive diagnostic tools, and outdoor seismic monitoring systems-without derating or performance loss, provided thermal pad is properly soldered to V– and board layout follows TI's recommended copper pour guidelines.

Does the OPA211AIDRGTG4 support single-supply operation?

Yes, the OPA211AIDRGTG4 supports true single-supply operation from 4.5 V to 36 V. Its rail-to-rail output stage and input common-mode range extending to within 1.8 V of V– and 1.4 V of V+ enable direct interfacing with microcontrollers and ADCs in 5-V or 3.3-V systems-eliminating the need for level shifters or dual supplies in portable instrumentation and IoT sensor nodes.

How does the shutdown feature of the OPA211AIDRGTG4 work?

The OPA211AIDRGTG4 shutdown pin (Pin 8) is active-high: device enables when VSHUTDOWN is between (V+) – 3 V and V+, and disables when VSHUTDOWN ≥ (V+) – 0.35 V. In shutdown mode, output enters high-impedance state and quiescent current drops to 1–20 μA per channel-ideal for power cycling individual signal paths in multi-channel DAQ systems without affecting adjacent channels.

Can the OPA211AIDRGTG4 drive capacitive loads directly?

Yes, the OPA211AIDRGTG4 can safely drive ≥100 pF capacitive loads without oscillation, as verified in Figure 28 of the datasheet. For loads >100 pF, TI recommends adding a small isolation resistor (e.g., 10–50 Ω) in series with the output to maintain phase margin-especially critical in high-precision DAC output buffers where ringing degrades monotonicity and integral nonlinearity.

What is the significance of the 'TG4' suffix in OPA211AIDRGTG4?

The 'TG4' suffix indicates TI's green packaging standard: lead-free, halogen-free, and compliant with JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3). It confirms full RoHS and REACH compliance, with no exemptions-ensuring unrestricted use in EU, China, Korea, and other regulated markets where environmental compliance is mandatory for industrial and medical electronics.