My Inquiry
My Account
Texas Instruments SRC4194IPAG
- Part No.:
- SRC4194IPAG
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 64-TQFP
- Datasheet:
-
SRC4194IPAG.pdf
- Description:
- IC SAMPLE RATE CONVERTER 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SRC4194IPAG from Texas Instruments is a four-channel asynchronous sample rate converter (ASRC) for professional audio systems, supporting input/output sampling rates up to 212kHz, 16:1 to 1:16 ratio range, 144dB dynamic range, and −140dB THD+N. It operates in broadcast studio equipment requiring precise clock domain bridging between ADCs, DACs, and DSPs.
For engineers reviewing the SRC4194IPAG datasheet, SRC4194IPAG pinout, SRC4194IPAG application, or SRC4194IPAG equivalent, key selection criteria include its dual-mode control (hardware pin-strapping or SPI software), TDM daisy-chaining capability, 28-bit internal data path with dithered 24-bit output, and support for de-emphasis at 32/44.1/48kHz.
Technical Context
The SRC4194IPAG implements independent dual-path ASRC architecture-one per channel pair-with fully decoupled interpolation and decimation filters. Each path supports four group delay options and direct downsampling mode, enabling deterministic latency tuning for real-time mixing consoles.
It features two configurable serial audio ports (A and B), each supporting I²S, left/right-justified, and TDM formats, plus dedicated SPI interface for register access in software mode. The device accepts separate +1.8V or +3.3V core supply and +1.65V–+3.6V I/O supply, with internal regulator when using +3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent channels (2 × dual-path ASRC blocks) |
| Sampling Rate Range | Input and output up to 212kHz; ratio range 16:1 (downsample) to 1:16 (upsample) |
| Dynamic Range | 144dB at −60dBFS input (A-weighted, BW = 20Hz to fs/2) |
| THD+N | −140dB at 0dBFS input (unweighted, BW = 20Hz to fs/2) |
| Digital Filter Stopband Attenuation | Better than −140dB for interpolation; −143dB for decimation |
| Data Path & Output Resolution | Internal 28-bit processing; dithered 24/20/18/16-bit output word length |
| Power Supply Options | +1.8V core (REGEN = 0) or +3.3V core (REGEN = 1); +1.65V–+3.6V I/O supply |
Pinout & Package
Available in TQFP-64 package with exposed thermal pad (Pb-free, RoHS-compliant). Pin layout supports dual-channel A/B audio paths, hardware/software mode selection (H/S pin), and dedicated SPI interface multiplexed on MODEB/DEMB pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RCKIA / RCKIB | Reference Clock Input (A/B) | Independent master clocks for each ASRC path; required for asynchronous operation |
| SDINA / SDINB | Audio Input Data (A/B) | Serial PCM or TDM input data; format controlled by IFMTx pins or SPI registers |
| SDOUTA / SDOUTB | Audio Output Data (A/B) | Converted output data; word length and format programmable via OWLx or SPI |
| H/S | Control Mode Select | High = hardware mode (pin-strapped configuration); low = software mode (SPI active) |
| MODEB0–MODEB2 / CDIN/CCLK/CS | SPI Interface (B-side only) | Four-wire SPI port active only in software mode; enables full register read/write access |
| RST | Reset & Hard Power-Down | Active-low synchronous reset; places device in ultra-low-current state (<100µA) |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Ratio Detection | Eliminates manual ratio programming; continuously tracks fsIN/fsOUT in real time for plug-and-play interoperability |
| TDM Daisy-Chaining | Enables up to four SRC4194IPAG devices on one TDM bus, reducing interconnect complexity in multi-channel routing systems |
| Programmable Digital Attenuation | 256-step (0.5dB resolution) software-controlled attenuation from 0dB to −127.5dB, enabling precise level matching without external DACs |
| Selectable De-Emphasis | User-configurable digital de-emphasis filter for 32kHz, 44.1kHz, and 48kHz playback-critical for legacy CD and broadcast content compliance |
| Low Group Delay Options | Four selectable interpolation filter buffers (8/16/32/64 samples) allow latency optimization for live monitoring vs. offline processing trade-offs |
Applications
| Digital Mixing Console | Digital Audio Workstation |
|---|---|
Use Scenario: Real-time routing of AES/EBU, MADI, and Dante-derived streams into a 96-channel analog summing stage. IC Role / Device Role / Timing Role: Asynchronous bridge between disparate clock domains (e.g., 44.1kHz DAW output → 96kHz console processing). Use Value: Eliminates audible clicks/pops during sample rate switching and preserves 144dB SNR across all routing paths. | Use Scenario: High-resolution multitrack recording with mixed source sample rates (e.g., 88.2kHz field recordings + 48kHz plugin renders). IC Role / Device Role / Timing Role: Sample rate normalization engine feeding FPGA-based DSP fabric or high-speed USB audio interface. Use Value: Enables lossless resampling at up to 212kHz while maintaining −140dB THD+N for mastering-grade fidelity. |
| Broadcast Studio Equipment | Audio Distribution System |
Use Scenario: Embedding audio into SDI video streams where audio clock must lock to video timing (e.g., 48kHz audio → 27MHz SDI pixel clock). IC Role / Device Role / Timing Role: Precision ASRC synchronizing audio to video reference via RCKI inputs, with ratio readback for status monitoring. Use Value: Guarantees frame-accurate lip-sync and eliminates buffer underruns during live transmission handoffs. | Use Scenario: Centralized audio distribution to 16-zone commercial sound system with varied endpoint sampling requirements (e.g., 32kHz paging + 96kHz background music). IC Role / Device Role / Timing Role: Multi-output ASRC hub generating synchronized, format-matched streams per zone via TDM daisy-chain. Use Value: Reduces channel count and PCB space versus discrete converters; maintains consistent 144dB dynamic range across all zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous sample rate conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4128AVQ | 2-channel ASRC; max 216kHz; no TDM daisy-chain; SPI-only control (no hardware mode) | Limited to stereo or dual-mono systems; lacks pin-strappable flexibility for fixed-function designs | Choose when board space is constrained and only two channels are needed with identical performance envelope |
| CS8422-CQZ | 2-channel ASRC; max 212kHz; supports S/PDIF I/O; no de-emphasis filter; 128dB dynamic range | Designed for consumer/prosumer gear with coaxial/optical interfaces; lower SNR margin than SRC4194IPAG | Choose when integrating S/PDIF transceivers directly or when cost sensitivity outweighs 12dB dynamic range penalty |
Compared with AK4128AVQ and CS8422-CQZ, the SRC4194IPAG delivers true 4-channel independence, hardware/software dual-mode operation, and superior 144dB dynamic range-making it the only option qualified for broadcast master control rooms where channel crosstalk and noise floor integrity are non-negotiable.
Availability
SRC4194IPAG is available at Aetrix Electronics and suitable for digital mixing consoles, broadcast studio equipment, and high-end audio distribution systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SRC4194IPAG 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 high-performance audio markets.
The SRC4194 product line targets professional audio infrastructure, delivering ultra-low-jitter, high-SNR asynchronous conversion for broadcast, live sound, and studio recording applications where signal integrity is mission-critical.
FAQ
What is the maximum supported input and output sampling rate for the SRC4194IPAG?
The SRC4194IPAG supports input and output sampling rates up to 212kHz. This specification is confirmed in the Electrical Characteristics table under "Input Sampling Frequency, fsIN" and "Output Sampling Frequency, fsOUT", both rated 4kHz to 212kHz. The device maintains full 144dB dynamic range and −140dB THD+N performance across this entire range when operating within specified supply and thermal conditions.
Does the SRC4194IPAG support TDM format and daisy-chaining?
Yes, the SRC4194IPAG supports TDM mode on both channel A and B serial ports, and explicitly allows daisy-chaining of up to four devices. This is documented in the FEATURES section and verified in the PIN DESCRIPTIONS table, where TDMIA and TDMIB pins are defined as TDM input data lines. The TDM implementation uses standard left-justified framing with programmable slot count, enabling scalable multi-device audio routing without additional glue logic.
How does the SRC4194IPAG handle power supply configuration?
The SRC4194IPAG supports two mutually exclusive core supply configurations: +1.8V (with REGEN = 0) or +3.3V (with REGEN = 1). When using +3.3V, an internal regulator generates the required +1.8V core voltage; VDD18 pins must be left unconnected. The digital I/O supply (VIO) operates independently from +1.65V to +3.6V, allowing interfacing with 1.8V, 2.5V, or 3.3V logic families without level shifters.
Can the SRC4194IPAG operate in both hardware and software control modes?
Yes, the SRC4194IPAG supports dual control modes selected by the H/S pin: hardware mode (H/S = high) uses dedicated configuration pins (IFMTx, OFMTx, etc.) for fixed-function operation, while software mode (H/S = low) enables full SPI register access for dynamic reconfiguration. In hardware mode, SPI pins (MODEB0–2, CDIN/CCLK/CS, CDOUT) are disabled; in software mode, pin-strapping inputs are ignored. This dual-mode architecture supports both cost-sensitive fixed designs and flexible field-upgradable systems.
What are the group delay options for the interpolation filter in the SRC4194IPAG?
The SRC4194IPAG offers four group delay options for the interpolation filter: 8-sample, 16-sample, 32-sample, and 64-sample buffer configurations. These correspond to group delays of 46/fsIN, 54.53125/fsIN, 70.53125/fsIN, and 102.53125/fsIN seconds respectively, as specified in the ELECTRICAL CHARACTERISTICS table under "DIGITAL INTERPOLATION FILTER CHARACTERISTICS". Selection is made via LGRPA0/LGRPA1 and LGRPB0/LGRPB1 pins in hardware mode or SPI register bits in software mode.
SRC4194IPAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-TQFP
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Sample Rate Converter
- Applications:
- Digital Audio Interfacing
- Number of Channels:
- 4
- Interface:
- I2S, TDM
- Voltage - Supply:
- 1.8V, 3.3V
- Operating Temperature:
- -45°C ~ 85°C (TA)
- Specifications:
- 4kHz ~ 212kHz
- Mounting Type:
- Surface Mount
- Grade:
- -
SRC4194IPAG FAQ
1.How can I place an order for SRC4194IPAG through Aetrix?
Please submit a Request for Quotation (RFQ) for SRC4194IPAG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SRC4194IPAG reliable?
The price and inventory of SRC4194IPAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRC4194IPAG is usually 5 days.
3.What payment methods are accepted for SRC4194IPAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRC4194IPAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRC4194IPAG?
SRC4194IPAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRC4194IPAG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SRC4194IPAG?
For technical support, including SRC4194IPAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRC4194IPAG requirements.
6.How does Aetrix verify that SRC4194IPAG is sourced from the original manufacturer or authorized distributors?
All SRC4194IPAG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SRC4194IPAG meets industry standards.
7.What is the process for return or replacement of SRC4194IPAG?
All SRC4194IPAG units undergo pre-shipment inspection (PSI). If there is an issue with SRC4194IPAG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SRC4194IPAG part is unused and in its original packaging.
Return procedure for SRC4194IPAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRC4194IPAG Tags
-
SA571DR2G
onsemi
-
ADAU7002ACBZ-R7
Analog Devices Inc.
-
DRV135UA/2K5
Texas Instruments
-
DRV134UA/1K
Texas Instruments
-
DRV134PA
Texas Instruments
-
DRV134UA
Texas Instruments
-
DRV135UA
Texas Instruments
-
SA572DR2G
onsemi
-
PGA2311U/1K
Texas Instruments
-
SI8244BB-D-IS1R
Skyworks Solutions Inc.
-
CS8416K-CZZR
Cirrus Logic Inc.
-
SRC4392IPFBR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
