Texas Instruments SRC4184IPAGG4

Overview

SRC4184IPAGG4 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 interfaces directly with ADCs, DACs, and DSPs in broadcast mixing consoles and digital audio workstations.

For engineers reviewing the SRC4184IPAGG4 datasheet, SRC4184IPAGG4 pinout, SRC4184IPAGG4 application, or SRC4184IPAGG4 equivalent, key selection considerations include its dual-mode operation (hardware pin-strapped or SPI software-controlled), TDM daisy-chaining capability, programmable digital attenuation (256 steps), and support for de-emphasis at 32/44.1/48 kHz.

Technical Context

The SRC4184IPAGG4 implements two independent, fully asynchronous conversion paths (SRC A and SRC B), each with configurable interpolation and decimation filters. Its linear-phase digital filtering supports four group delay options for interpolation and direct downsampling for decimation, enabling precise latency control in real-time audio routing.

It features dual serial audio ports per channel (input/output), supporting I²S, left/right-justified, and TDM formats - with TDM allowing up to four devices to be daisy-chained. Control is implemented via dedicated hardware pins or a four-wire SPI interface, with mode selection via the H/S pin.

Key Specifications

Pinout & Package

Package: TQFP-64 (10 mm × 10 mm, 0.5 mm pitch).

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 SRC4184IPAGG4 delivers higher channel density (4-channel), superior dynamic range (128 dB vs ≤120 dB), integrated de-emphasis, and flexible hardware/software dual-mode control - making it optimal for broadcast-grade multi-format routing where signal fidelity and configurability are critical.

Availability

SRC4184IPAGG4 is available at Aetrix Electronics and suitable for digital mixing consoles, broadcast studio equipment, and professional audio distribution systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SRC4184IPAGG4 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with leadership in high-performance audio, precision data conversion, and power management ICs.

The SRC4184 product line targets professional and broadcast audio infrastructure, delivering ultra-low-jitter, high-dynamic-range asynchronous sample rate conversion for mission-critical audio routing and format interoperability.

FAQ

What is the maximum supported input and output sampling rate for the SRC4184IPAGG4?

The SRC4184IPAGG4 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 studio standards. The device maintains full 128 dB dynamic range and −125 dB THD+N performance across this entire range when operated within specified supply and thermal conditions.

Does the SRC4184IPAGG4 support TDM mode, and how many devices can be daisy-chained?

Yes, the SRC4184IPAGG4 supports TDM mode on both input and output serial ports, explicitly stated in the FEATURES section and validated in the PIN DESCRIPTIONS table (TDMIA/TDMIB pins). Up to four SRC4184IPAGG4 devices can be daisy-chained in TDM mode, enabling scalable multi-channel audio routing without additional multiplexing logic. This capability is unique to the SRC4184 family and leverages dedicated TDM data lanes and shared bit/word clocks.

How does the SRC4184IPAGG4 handle power supply configuration - can it operate from a single supply?

Yes, the SRC4184IPAGG4 supports single-supply operation: either +1.8 V (with REGEN = 0) or +3.3 V (with REGEN = 1) for the core logic. When using +3.3 V, an internal regulator derives the required +1.8 V core voltage. A separate digital I/O supply (VIO) operates from +1.65 V to +3.6 V, allowing interfacing with mixed-voltage systems. Absolute maximum ratings confirm safe operation within these ranges, and power dissipation data shows <1 mW in hard power-down mode.

What are the key differences between Hardware Mode and Software Mode on the SRC4184IPAGG4?

In Hardware Mode (H/S = 1), configuration is set via dedicated pins (IFMTx, OFMTx, MODEx, etc.), enabling standalone operation without a microcontroller. In Software Mode (H/S = 0), all settings are controlled via the four-wire SPI interface (CS/CCLK/CDIN/CDOUT), allowing dynamic reconfiguration and register readback. Pin functions like MODEB[0–2] and DEMB[0–1] are disabled in Software Mode, while RATIOA/RATIOB and RDYA/RDYB flags remain active in both modes for status monitoring.

Is digital de-emphasis supported on the SRC4184IPAGG4, and for which sampling rates?

Yes, the SRC4184IPAGG4 includes a user-selectable digital de-emphasis filter explicitly supporting 32 kHz, 44.1 kHz, and 48 kHz output sampling rates, as documented in the FEATURES list and ELECTRICAL CHARACTERISTICS table ("Digital De-Emphasis"). De-emphasis error is specified at 0.001 dB, ensuring compliance with Red Book CD and EBU broadcast standards. It is applied post-conversion and is programmable only in Software Mode via SPI register writes.