STMicroelectronics TS482IQT

Overview

TS482IQT from STMicroelectronics is a dual-channel rail-to-rail input/output stereo headphone amplifier delivering up to 100mW per channel into 16Ω at 5V, with 0.03% THD+N, 110dB SNR (A-weighted), and 85dB PSRR - designed for low-voltage portable audio systems including notebook computers and set-top boxes.

For engineers reviewing the TS482IQT datasheet, TS482IQT pinout, TS482IQT application, or TS482IQT equivalent, key selection considerations include its DFN8 package thermal performance (R_thJA = 41°C/W on 4-layer PCB), unity-gain stability with external resistor-set gain, and click-reduction circuitry enabling clean ON/OFF transitions in battery-powered audio interfaces.

Technical Context

The TS482IQT implements two independent fully differential amplifiers with rail-to-rail input common-mode range (GND to V_CC) and output swing (e.g., 0.48V to 4.4V into 16Ω at 5V). It operates from 2V to 5.5V and supports closed-loop gain configuration via external R_in/R_feed networks (Av = –R_feed/R_in), with unity-gain stability verified across supply voltages and load conditions (8–600Ω).

Its architecture integrates switch-controlled click suppression, high PSRR (≥75dB from 2V to 5.5V), and robust crosstalk immunity (100dB at 1kHz), enabled by matched internal transistor pairs and low-input-bias-current design (200–500nA). Thermal protection activates at T_j = 150°C, with DFN8 package enabling 1.79W max power dissipation at T_amb = 25°C.

Key Specifications

Pinout & Package

TS482IQT is housed in a thermally enhanced 8-pin DFN (3 × 3 mm, 0.5 mm pitch) with exposed thermal pad (EP), rated for 1.79W power dissipation on a 4-layer PCB (R_thJA = 41°C/W). The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo headphone amplifier applications.

Compared with TAS5707PAP and MAX4410ETE+, TS482IQT offers superior integration for space-constrained portable audio: DFN8 footprint, built-in click reduction, rail-to-rail operation down to 2V, and guaranteed 100mW output without external filters or discrete suppression circuits.

Availability

TS482IQT is available at Aetrix Electronics and suitable for portable computing, consumer audio equipment, and industrial HMI applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and low-voltage headphone drive capability.

Supply support for TS482IQT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in analog, power, and microcontroller solutions for automotive, industrial, and consumer markets.

The TS482 belongs to ST's high-fidelity audio amplifier product line, engineered specifically for low-voltage, low-noise, and space-efficient stereo headphone drive in portable and embedded systems.

FAQ

What is the minimum supply voltage for full 100mW output capability?

The TS482IQT delivers 100mW per channel only at V_CC = 5V into 16Ω with 0.1% THD+N. At 3.3V, maximum output drops to 38mW; at 2V, it is 11.5mW. Full-rated power requires nominal 5V operation - lower voltages reduce headroom and output swing, limiting usable power before clipping.

Can TS482IQT drive 32Ω headphones effectively?

Yes - it delivers 65mW per channel into 32Ω at 5V (0.1% THD+N), with 95dB SNR and 100dB crosstalk. The rail-to-rail output swing ensures >2.8Vpp into 32Ω, providing adequate loudness for most consumer headphones while maintaining low distortion and noise.

Is external gain-setting mandatory, or does TS482IQT support fixed-gain operation?

External resistors are required to set closed-loop gain (Av = –R_feed/R_in). The device has no internal fixed-gain option. Typical configurations use 3.9kΩ for R_in and 100kΩ for R_feed to achieve Av ≈ –25.6, but any stable unity-gain or higher configuration is supported without compensation.

How does the DFN8 package of TS482IQT compare thermally to SO-8 and MiniSO-8 variants?

On a 4-layer PCB, TS482IQT's DFN8 achieves R_thJA = 41°C/W - significantly better than SO-8 (150°C/W) and MiniSO-8 (190°C/W). This allows 1.79W max power dissipation at T_amb = 25°C, enabling higher continuous output in compact layouts where airflow is limited.