SRC4193IDB

Audio Special Purpose Overview

The SRC4193IDB is a stereo asynchronous sample-rate converter (ASRC) from Texas Instruments, housed in a 28-pin SSOP package. It supports input and output sampling rates up to 212 kHz with a flexible ratio range of 16:1 to 1:16. Key electrical specifications include a dynamic range of 144 dB and total harmonic distortion plus noise (THD+N) of –140 dB. The device operates on a single 3.3-V supply (VDD) and accepts a digital I/O supply (VIO) between 1.65 V and 3.6 V. Unlike the pin-programmable SRC4192, the SRC4193 utilizes an SPI interface for software-controlled configuration of all functions.

Audio Special Purpose Feature Summary

• Software-controlled operation via Serial Peripheral Interface (SPI) port
• High-performance linear-phase digital filtering with stop band attenuation >140 dB
• Flexible audio serial ports supporting I2S, Left-Justified, Right-Justified, and TDM formats
• Programmable digital output attenuation with 256 steps (0 dB to –127.5 dB)

Audio Special Purpose Applications

• Digital mixing consoles
• Broadcast studio equipment
• High-end A/V receivers

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix 'DB' corresponds to the 28-pin SSOP tube packaging when sourcing components. Confirm that the design requires the software-configurable architecture of the SRC4193 rather than the hardware-pin-configured SRC4192, as their control interfaces differ significantly despite functional similarities.

Audio Special Purpose Selection Notes

Select the SRC4193IDB when system flexibility is required through register programming rather than fixed hardware pins. Ensure the host microcontroller provides an available SPI bus for configuring data formats, mute states, and attenuation levels. Verify that the VIO supply voltage aligns with the logic levels of connected digital signal processors or transmitters.

Audio Special Purpose Part Context

The SRC4193IDB belongs to the SRC419x family of high-end stereo asynchronous sample-rate converters. It shares core audio performance metrics with the SRC4192 but differs in its control mechanism. While the SRC4192 uses dedicated control pins for mode selection, the SRC4193 replaces these with an SPI interface, allowing for more complex system configurations and daisy-chaining capabilities.

Audio Special Purpose Replacement Considerations

The SRC4192IDB is a pin-compatible alternative within the same package. However, it lacks the SPI interface and programmable attenuation features. Substitution requires redesigning the control logic to use hardware pins instead of software registers.

Audio Special Purpose FAQ

How does the SRC4193 handle input-to-output sampling ratios?

The device automatically senses and supports a wide input-to-output sampling ratio range from 16:1 to 1:16.

What is the maximum supported sampling frequency for this component?

The SRC4193 supports both input and output sampling rates up to 212 kHz.

Can the SRC4193 operate with different logic voltage levels?

Yes, the digital I/O supply (VIO) operates over a range of 1.65 V to 3.6 V, providing flexibility for interfacing with various logic devices.