Texas Instruments SRC4190IDBRQ1

Overview

SRC4190IDBRQ1 from Texas Instruments is an automotive-qualified asynchronous sample rate converter (ASRC) for professional audio systems. It supports 16–24-bit stereo audio, input/output sampling rates up to 212 kHz, and a 16:1 to 1:16 input-to-output sampling ratio. Its 128 dB dynamic range, –125 dB THD+N, and low-group-delay interpolation filter enable high-fidelity resampling in broadcast consoles and A/V receivers.

For engineers reviewing the SRC4190IDBRQ1 datasheet, SRC4190IDBRQ1 pinout, SRC4190IDBRQ1 application, or SRC4190IDBRQ1 equivalent, key selection factors include its SSOP-28 package, dual-master/slave serial port flexibility, TDM daisy-chaining capability, and automotive-grade qualification (–40°C to 85°C).

Technical Context

The SRC4190IDBRQ1 implements a fully asynchronous architecture with independent input and output clocks, using a rate estimator that compares LRCKI, LRCKO, and RCKI to dynamically compute FIFO pointer offsets and re-sampling coefficients. Its 28-bit internal data path feeds interpolation and decimation filters with ±0.007 dB passband ripple and –125 dB stopband attenuation.

It supports seven configurable serial port modes via MODE[2:0], enabling master/slave combinations for I²S, left/right-justified, or TDM formats. The device includes dedicated control pins for bypass, soft mute, low-group-delay mode, and power-down - all operating from a single 3.3-V core supply and flexible 1.65–3.6-V I/O supply (VIO).

Key Specifications

Pinout & Package

Package: SSOP-28 (DB), 10.2 mm × 5.3 mm, 0.65 mm pitch, surface-mount - compatible with standard SMT assembly and automotive thermal cycling requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD1896ASTZ and SRC4192IDBR, the SRC4190IDBRQ1 uniquely combines AEC-Q100 qualification, TDM daisy-chaining, and a programmable 1.65–3.6-V I/O supply - making it the only option for scalable, thermally robust, automotive-grade ASRC deployment.

Availability

SRC4190IDBRQ1 is available at Aetrix Electronics and suitable for broadcast studio equipment, automotive infotainment systems, and high-end A/V receivers requiring stable component supply across extended product lifecycles.

Supply support for SRC4190IDBRQ1 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The SRC4190-Q1 belongs to TI's high-performance audio interface product line, engineered specifically for automotive and professional audio applications demanding ultra-low distortion, wide sampling ratio flexibility, and robust electromagnetic compatibility.

FAQ

What is the maximum supported input and output sampling frequency for the SRC4190IDBRQ1?

The SRC4190IDBRQ1 supports input and output sampling frequencies up to 212 kHz, as confirmed in the Electrical Characteristics table under "fSIN" and "fSOUT" parameters. This enables compatibility with ultra-high-resolution audio formats including DSD-derived PCM and studio master recordings, while maintaining full dynamic range and low THD+N performance across the entire range.

Does the SRC4190IDBRQ1 require an external EEPROM or configuration memory?

No, the SRC4190IDBRQ1 is a pin-programmed device with no external memory requirement. All configuration - including data format, word length, master/slave mode, and low-group-delay selection - is set via dedicated control pins (IFMT[2:0], OFMT[1:0], OWL[1:0], LGRP, MODE[2:0]). This simplifies BOM, reduces startup time, and enhances reliability in automotive environments.

How does the SRC4190IDBRQ1 handle clock jitter from the reference input (RCKI)?

The SRC4190IDBRQ1 attenuates reference clock jitter through its asynchronous architecture and high-precision rate estimator, which derives resampling coefficients independently of RCKI phase noise. TI's datasheet explicitly states "Attenuates Sampling and Reference Clock Jitter" as a key feature, and measured THD+N remains –125 dB even with jittered inputs - confirming effective jitter rejection without requiring ultra-low-jitter oscillators.

Can the SRC4190IDBRQ1 operate with different supply voltages for core and I/O rails?

Yes, the SRC4190IDBRQ1 uses separate supplies: VDD = 3.3 V ±10% for the digital core, and VIO = 1.65 V to 3.6 V for all digital I/O pins (SDIN, SDOUT, BCKI, LRCKI, etc.). This allows direct interfacing with 1.8-V DSPs or 3.3-V ADCs without level shifters - a critical advantage in mixed-voltage automotive and pro-audio designs.

Is the SRC4190IDBRQ1 pin-compatible with other TI sample rate converters?

Yes, the SRC4190IDBRQ1 is explicitly pin-compatible with the SRC4192, as stated in the Features section of the datasheet. This enables drop-in replacement in existing designs using the SRC4192, provided automotive qualification and the same SSOP-28 footprint are acceptable - no PCB or schematic changes are needed for migration.