Texas Instruments INA2134UAG4

Overview

INA2134UAG4 from Texas Instruments (originally Burr-Brown) is a dual-channel, high-fidelity differential line receiver IC designed for precision audio signal conditioning. It features fixed 0 dB (1 V/V) gain, 90 dB CMRR, 14 V/µs slew rate, and 0.0005% THD+N at 1 kHz - enabling low-noise, low-distortion reception in professional audio interfaces and instrumentation systems.

For engineers reviewing the INA2134UAG4 datasheet, INA2134UAG4 pinout, INA2134UAG4 application, or INA2134UAG4 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world application use cases, and validated alternative options - all grounded in the official SBOS071 datasheet and TI packaging documentation.

Technical Context

The INA2134UAG4 integrates two fully independent, laser-trimmed precision op-amp channels with on-chip 25 kΩ resistor networks optimized for unity-gain differential-to-single-ended conversion. Its architecture ensures minimal crosstalk (< –117 dB at 1 kHz) and stable operation up to 500 pF capacitive load without compensation.

It operates across ±4 V to ±18 V supplies, supports input common-mode voltages up to ±31 V (with 74–90 dB CMRR), and maintains < ±1000 µV input offset voltage over –40°C to +85°C - making it suitable for ground-loop elimination and high-impedance summing in mixed-signal industrial audio systems.

Key Specifications

Pinout & Package

INA2134UAG4 is housed in a 14-pin SOIC (SO-14) surface-mount package with 1.27 mm pitch, 8.75 mm × 3.91 mm body, and 1.75 mm max height - compliant with JEDEC MS-012 variation AB and RoHS requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential line receiver applications.

Compared with INA2134UAG4, INA2134PA offers better thermal resistance in through-hole assembly but lacks modern RoHS compliance, while OPA1632DR delivers higher precision at the cost of design complexity and no integrated gain-setting resistors - making INA2134UAG4 optimal for production-ready, low-risk audio signal conditioning.

Availability

INA2134UAG4 is available at Aetrix Electronics and suitable for professional audio interfaces, industrial data acquisition systems, and broadcast equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for INA2134UAG4 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 acquired Burr-Brown in 2000 and maintains its high-precision analog portfolio, emphasizing signal integrity, low noise, and industrial reliability across audio, instrumentation, and sensor interface products.

The INA2134UAG4 belongs to TI's legacy precision audio amplifier family, engineered specifically for differential line reception, ground-loop mitigation, and unity-gain summing in demanding analog signal chains - not general-purpose op-amp use.

FAQ

What is the maximum capacitive load the INA2134UAG4 can drive without instability?

The INA2134UAG4 is specified for stable operation with up to 500 pF capacitive load on its output, as confirmed in the SBOS071 datasheet Absolute Maximum Ratings and Typical Performance Curves. This allows direct connection to long cables or ADC input capacitance without external isolation resistors. Exceeding 500 pF may cause overshoot or ringing; for heavier loads, a series 10–22 Ω resistor between output and capacitance restores stability. The INA2134UAG4's internal compensation is optimized for this limit.

Does the INA2134UAG4 support single-supply operation?

No - the INA2134UAG4 requires dual ±4 V to ±18 V supplies and is not characterized for single-supply use. Its input common-mode range extends to 2(V+)–4 V and 2(V–)+2 V, but operation with V– = 0 V violates the absolute maximum rating for input voltage (±80 V) and degrades CMRR and distortion performance. For single-supply applications, TI recommends alternatives like the INA134UA or OPA1632 - the INA2134UAG4 must be powered from true split rails.

Can pins 1 and 3 or pins 2 and 5 be swapped on the INA2134UAG4?

No - pins 1 (Ref A) and 3 (+In A), or pins 2 (–In A) and 5 (+In B), must not be interchanged. Although nominal resistor values are equal (25 kΩ), they are laser-trimmed as matched pairs to achieve precise gain and 90 dB CMRR. Swapping these pins breaks the calibrated ratio, degrading gain accuracy and common-mode rejection below specification. The SBOS071 datasheet explicitly warns against this in Applications Information section.

What is the purpose of the Sense pins (pins 12 and 10) on the INA2134UAG4?

Pins 12 (Sense A) and 10 (Sense B) provide access to the internal amplifier output nodes before the final output buffer stage. They enable precise feedback configuration - such as adding external gain or implementing current sensing - without loading the main Out A/Out B pins. This separation preserves output drive capability and stability while allowing flexible signal conditioning. The INA2134UAG4 datasheet confirms their use in Figure 4 (Boosting Output Current) and summing configurations.

Is the INA2134UAG4 pin-compatible with the INA134 series?

No - the INA2134UAG4 (14-pin SOIC) is not pin-compatible with the single-channel INA134UA (8-pin SOIC). Their pin counts, layouts, and terminal assignments differ fundamentally: INA134UA uses pins 1–8 for Ref, –In, +In, V–, NC, V+, Output, and Sense; INA2134UAG4 allocates 14 pins across two independent channels with duplicated Ref/Sense/In/Out functions plus V+ and V– shared. Direct substitution requires PCB redesign - no mechanical or electrical pin-to-pin equivalence exists.