Texas Instruments SRC4184IPAG

Overview

SRC4184IPAG from Texas Instruments is a four-channel asynchronous sample rate converter (ASRC) designed for professional audio systems. It supports input/output sampling rates up to 212 kHz, achieves 128 dB dynamic range and −125 dB THD+N, and operates with 16:1 to 1:16 input-to-output sampling ratios. It is used in digital mixing consoles and broadcast studio equipment where precise, low-distortion sample rate translation is required.

For engineers reviewing the SRC4184IPAG datasheet, SRC4184IPAG pinout, SRC4184IPAG application, or SRC4184IPAG equivalent, this page provides verified technical context, TQFP-64 package details, hardware/software control mode configuration, dithered 24-bit output path, and real-world audio system integration guidance.

Technical Context

The SRC4184IPAG implements dual independent ASRC channels (A and B), each supporting fully asynchronous operation with programmable interpolation and decimation filters. Its linear-phase digital filtering includes four group delay options for interpolation and direct downsampling capability for decimation.

It features dual serial audio ports supporting I²S, left/right-justified, and TDM formats - with TDM enabling daisy-chaining of up to four devices. Control is available in Hardware mode (pin-strapped) or Software mode via a four-wire SPI interface for register-level access.

Key Specifications

Pinout & Package

Package: TQFP-64 (10 mm × 10 mm, 0.5 mm pitch), thermally enhanced for sustained audio processing loads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous sample rate conversion applications.

Compared with AK4128A and CS8422-CQZ, the SRC4184IPAG uniquely delivers four-channel capacity, hardware/software dual-mode operation, and TDM daisy-chaining - making it the only option for scalable, field-deployable broadcast infrastructure requiring redundancy and mixed-control deployment.

Availability

SRC4184IPAG is available at Aetrix Electronics and suitable for digital mixing consoles, broadcast studio equipment, and audio distribution systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SRC4184IPAG 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, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The SRC4184IPAG belongs to TI's professional audio signal chain portfolio, engineered specifically for broadcast-grade, low-latency, multi-channel sample rate conversion in mission-critical audio infrastructure.

FAQ

What is the maximum supported input and output sampling rate for the SRC4184IPAG?

The SRC4184IPAG supports input and output sampling rates up to 212 kHz, as confirmed in the Electrical Characteristics table under "Input Sampling Frequency, fsIN" and "Output Sampling Frequency, fsOUT". This enables compatibility with high-resolution audio formats including 192 kHz PCM and emerging 212 kHz broadcast standards. The device maintains full 128 dB dynamic range and −125 dB THD+N performance across this entire range when operating under specified conditions (TA = +25°C, VDD33 = +3.3 V).

Does the SRC4184IPAG support both hardware and software configuration modes?

Yes, the SRC4184IPAG supports dual configuration modes. In Hardware mode (H/S pin high), functions like serial port format, de-emphasis, and bypass are controlled directly via dedicated pins (e.g., IFMTA[0–2], OFMTA[0–1]). In Software mode (H/S pin low), those same functions are accessed via a four-wire SPI interface using MODEA/B pins repurposed as CS/CCLK/CDIN/CDOUT. This dual-mode architecture allows flexible deployment - from standalone pin-programmed modules to tightly integrated MCU-controlled systems - without changing the SRC4184IPAG footprint or design.

How many independent sample rate conversion channels does the SRC4184IPAG provide?

The SRC4184IPAG provides four independent sample rate conversion channels, implemented as two dual-channel blocks labeled SRC A and SRC B. Each block has its own reference clock (RCKIA/RCKIB), input/output data paths (SDINA/SDOUTA and SDINB/SDOUTB), and control logic. Pin descriptions confirm separate ready flags (RDYA/RDYB), ratio flags (RATIOA/RATIOB), and mute inputs (MUTEA/MUTEB), confirming true channel independence - essential for simultaneous conversion of multiple asynchronous audio streams in digital consoles and broadcast routers.

What package type is used for the SRC4184IPAG, and what are its thermal characteristics?

The SRC4184IPAG uses a TQFP-64 package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Absolute maximum ratings specify an operating case temperature range of −40°C to +85°C, and typical power dissipation is 155 mW (dynamic, 192 kHz) or 320 mW (with +3.3 V supply). The package supports standard reflow profiles and is compatible with automated assembly. Thermal resistance data (θJA) is not published in the provided datasheet, but the dual power domains (VDD18/VDD33 and VIO) and ground pin placement (DGND at pins 23 and 57) are optimized for low-noise audio performance and thermal stability in continuous operation.

Can the SRC4184IPAG perform digital de-emphasis, and for which sampling rates is it valid?

Yes, the SRC4184IPAG includes a user-selectable digital de-emphasis filter that is valid only for 32 kHz, 44.1 kHz, and 48 kHz output sampling rates - as explicitly stated in the Features list and Electrical Characteristics table. De-emphasis is disabled for all other rates (e.g., 96 kHz, 192 kHz) and introduces ≤0.001 dB error when enabled at supported rates. Configuration is done via DEMA[0–1] and DEMB[0–1] pins in Hardware mode or corresponding registers in Software mode. This ensures compliance with legacy CD and broadcast pre-emphasis standards without affecting higher-sample-rate content.