Texas Instruments DRV134UAG4

Overview

DRV134UAG4 from Texas Instruments is a precision audio-balanced line driver IC that converts single-ended input signals to high-fidelity differential outputs with +6 dB gain (G = 2). It delivers 17 V_rms into 600 Ω, achieves 0.0005% THD+N at 1 kHz, and operates from ±4.5 V to ±18 V supplies. It is used in professional audio transmission systems where noise immunity and cable drive capability are critical.

For engineers reviewing the DRV134UAG4 datasheet, DRV134UAG4 pinout, DRV134UAG4 application, or DRV134UAG4 equivalent, key selection considerations include its 50 Ω matched output impedance, laser-trimmed resistor network for >68 dB common-mode rejection, wide –55°C to +125°C operating range, and SOL-16 surface-mount package compatibility with long-cable audio distribution.

Technical Context

The DRV134UAG4 implements a cross-coupled differential output stage with integrated 50 Ω series resistors per output, yielding low differential-mode output impedance (50 Ω) and high common-mode output impedance (1.6 kΩ). Its internal architecture uses laser-trimmed thin-film resistors to ensure precise gain matching and optimal signal balance ratio (SBR).

It supports both differential-output mode (±VO driven, +6 dB gain) and single-ended mode (one output grounded, ±2 dB gain), with dedicated +Sense/–Sense pins enabling remote sensing for improved load regulation. The device is fully specified for industrial temperature operation (–40°C to +85°C) and extended-range use (–55°C to +125°C).

Key Specifications

Pinout & Package

SOL-16 surface-mount package (10.30 mm × 7.50 mm body size), thermally optimized with θ_JA = 80 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio-balanced line driver applications.

Compared with DRV134UA and SSM2142ARZ, the DRV134UAG4 provides tighter gain matching (±0.1% vs ±2%), higher OCMR (68 dB vs 55 dB), and built-in 50 Ω output resistors-reducing BOM count and layout sensitivity while enabling direct drop-in replacement in new designs requiring best-in-class audio fidelity.

Availability

DRV134UAG4 is available at Aetrix Electronics and suitable for professional audio distribution amplifiers, broadcast console I/O stages, hi-fi interconnects, and industrial monitoring systems requiring stable component supply across extended temperature ranges and long-lifecycle deployments.

Supply support for DRV134UAG4 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 leadership in high-performance audio signal chain solutions.

The DRV134 product line was engineered specifically for professional balanced audio transmission-delivering transformerless, low-distortion differential driving capability with integrated precision resistors and robust thermal performance in surface-mount packages.

FAQ

What is the maximum output voltage swing of the DRV134UAG4 into a 600 Ω load?

The DRV134UAG4 delivers up to 17 V_rms into a 600 Ω differential load, corresponding to 27 dBu headroom. This is measured under recommended operating conditions (±18 V supplies, T_A = +25°C) and ensures linear operation with <0.01% THD+N. The DRV134UAG4 maintains this swing across its full –40°C to +85°C specification range, supported by its ±2.5 V headroom from each rail.

Does the DRV134UAG4 require external output resistors for 600 Ω cable driving?

No, the DRV134UAG4 integrates precision 50 Ω series resistors on both +VO and –VO outputs, eliminating the need for external termination. These laser-trimmed resistors ensure matched impedance and optimal signal balance ratio (SBR >54 dB), directly supporting standard 600 Ω balanced audio cabling without additional components. The DRV134UAG4's internal design guarantees stability with ≥1 µF load capacitance per output.

Can the DRV134UAG4 operate in single-ended mode, and what is the gain configuration?

Yes, the DRV134UAG4 supports single-ended operation by grounding either the –VO/–Sense pair (for non-inverted +2× gain) or +VO/+Sense pair (for inverted –2× gain), maintaining +6 dB differential gain capability. In this mode, output drive strength remains unchanged, and THD+N stays within 0.0005% at 1 kHz. The DRV134UAG4's architecture preserves audio fidelity even when configured for space-constrained layouts requiring single-ended interfacing.

What is the purpose of the +Sense and –Sense pins on the DRV134UAG4?

The +Sense and –Sense pins provide remote sensing feedback for the +VO and –VO outputs respectively, enabling closed-loop regulation of output common-mode voltage (V_OCM). This compensates for voltage drops across PCB traces or connectors, ensuring accurate differential output amplitude and symmetry under varying load conditions. The DRV134UAG4 leverages these pins to maintain >68 dB common-mode rejection even with long interconnects.

Is the DRV134UAG4 compatible with the INA134 or INA137 differential receivers?

Yes, the DRV134UAG4 is explicitly designed as a companion to the INA134 (G = 0 dB) and INA137 (G = ±6 dB) differential line receivers. When paired with the INA137 in –6 dB gain mode, the DRV134UAG4/INA137 combination achieves unity overall system gain while preserving full balanced signal integrity, noise rejection, and THD+N <0.0005%. This forms a complete transformerless audio transmission solution.