Texas Instruments DRV135UAG4

Overview

DRV135UAG4 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, supports ±4.5 V to ±18 V dual supplies, and features on-chip laser-trimmed 50 Ω series output resistors for optimal signal balance in professional audio transmission.

For engineers reviewing the DRV135UAG4 datasheet, DRV135UAG4 pinout, DRV135UAG4 application, or DRV135UAG4 equivalent, this page provides verified specifications, SO-8 package layout, differential driving capability for long cable runs, common-mode rejection performance, and real-world design context for analog audio signal integrity in studio, broadcast, and industrial systems.

Technical Context

The DRV135UAG4 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 architecture uses matched thin-film resistors laser-trimmed for precise gain accuracy (±0.1% initial error) and superior output common-mode rejection (68 dB typical).

It operates in two validated functional modes: differential-output mode (single-ended input → floating balanced output) and single-ended mode (grounded unused output pair), both maintaining +6 dB gain. The device is fully specified over –40°C to +85°C (operation up to +125°C), with thermal resistance of 150°C/W in SO-8 package.

Key Specifications

Pinout & Package

DRV135UAG4 is housed in an 8-pin SOIC (SO-8) surface-mount package measuring 4.90 mm × 3.91 mm, optimized for space-constrained PCB layouts while maintaining thermal performance (θ_JA = 150°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DRV134PWR and SSM2142TR, DRV135UAG4 delivers superior THD+N (0.0005% vs 0.001%), eliminates external resistor matching, fits in half the PCB area, and provides guaranteed 68 dB OCMR without calibration - making it the preferred choice for new professional audio designs requiring space efficiency and production consistency.

Availability

DRV135UAG4 is available at Aetrix Electronics and suitable for professional audio distribution amplifiers, broadcast mix consoles, Hi-Fi interconnects, and industrial monitoring systems requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for DRV135UAG4 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.

DRV135UAG4 belongs to TI's precision audio line driver product line, engineered specifically for transformerless balanced audio transmission in professional, broadcast, and industrial environments demanding ultra-low distortion and robust noise immunity.

FAQ

What is the primary function of the DRV135UAG4 in an audio system?

The DRV135UAG4 functions as a precision balanced line driver that converts a single-ended input signal into a high-fidelity differential output pair. It provides +6 dB gain, 50 Ω matched output impedance, and laser-trimmed internal resistors to ensure exceptional common-mode rejection and signal balance - critical for noise-free transmission over long cables. The DRV135UAG4 is explicitly designed for professional audio infrastructure where transformerless analog signal integrity is mandatory.

Does the DRV135UAG4 require external output resistors for proper termination?

No, the DRV135UAG4 does not require external output resistors. It integrates precision 50 Ω series resistors on both +VO and –VO outputs, laser-trimmed for ratio matching and stability. This eliminates the need for external termination components, reduces PCB footprint, and guarantees consistent 50 Ω differential output impedance - a key differentiator from op-amp-based alternatives like the SSM2142TR that require external precision resistors.

Can the DRV135UAG4 operate with asymmetric supply voltages such as +15 V and –5 V?

No, the DRV135UAG4 requires symmetrical dual supplies. Its absolute maximum ratings specify V+ to V– ≤ 40 V, and recommended operating conditions define V+ and V– as equal magnitude (±4.5 V to ±18 V). Asymmetric supplies violate the internal biasing architecture and risk distortion, offset drift, or latch-up. For asymmetric rail systems, external level-shifting or dedicated DC-DC generation is required before applying power to DRV135UAG4.

How does the DRV135UAG4 handle large capacitive loads, such as those from 500-ft audio cables?

The DRV135UAG4 is characterized for stable operation with ≥1 µF load capacitance per output (tied to ground), directly supporting long-shielded audio cables like Belden 8451/9452. Its output stage topology and internal compensation maintain phase margin under heavy capacitive loading, evidenced by <10% overshoot at 1000 pF (Figure 20) and verified THD+N < 0.002% at 10 kHz with 500-ft cable loads. No external isolation resistors or compensation networks are needed.

Is the DRV135UAG4 pin-compatible with the DRV134 in SO-8 packaging?

Yes, the DRV135UAG4 is pin-compatible with the DRV134RGY (SO-8 variant of DRV134). Both share identical 8-pin SOIC footprints, pin numbering, and pin functions: VIN (4), Gnd (3), +VO (8), –VO (1), +Sense (7), –Sense (2), V+ (6), V– (5). Electrical specifications are identical; the only distinction is that DRV134 is also offered in DIP-8 and SOL-16 packages, whereas DRV135UAG4 is SO-8 only - simplifying layout reuse across TI's DRV13x family.