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Texas Instruments TLC320AD56CPT
- Part No.:
- TLC320AD56CPT
- Manufacturer:
- Texas Instruments
- Category:
- CODECS
- Package:
- -
- Datasheet:
-
TLC320AD56CPT.pdf
- Description:
- ANALOG CIRCUIT, 1 FUNC, PQFP48
- Quantity:
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Inventory:2,007
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Product details
Overview
TLC320AD56CPT from Texas Instruments is a sigma-delta analog interface circuit integrating 16-bit ADC and DAC paths with on-chip decimation and interpolation filters, differential analog I/O, and serial interface for voice-band signal processing. It operates at 8 kHz sampling rate with 87 dB ADC SNR and 85 dB DAC dynamic range, supporting business audio and modem applications using V.34-compatible clocking.
For engineers reviewing the TLC320AD56CPT datasheet, TLC320AD56CPT pinout, TLC320AD56CPT application, or TLC320AD56CPT equivalent, this page delivers verified technical context, real-world timing behavior, confirmed power-down performance, and validated alternative options for legacy telecom and embedded audio designs.
Technical Context
The TLC320AD56CPT implements fourth-order sigma-delta modulation with 64× oversampling in both ADC and DAC paths, coupled with FIR-based decimation (1:64) and interpolation filters. Its serial interface supports primary 16-bit data transfer synchronized to FS and SCLK, plus secondary register programming via hardware FC or software command.
It features dual supply operation (AVDD = 5 V, DVDD = 3 V or 5 V), internal 2.5 V VCOM references for ADC/DAC common-mode bias, and current-output DAC with OUTP/OUTM requiring 5 kΩ differential load. Power-down mode reduces dissipation to 2.5 mW while preserving register contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 16-bit output word, 2's-complement format, derived from 64× oversampled sigma-delta modulator |
| DAC Output Type | Current-output differential pair (OUTP/OUTM), requires external 5 kΩ load for voltage conversion |
| Sampling Rate | 8 kHz standard (MCLK = 4.096 MHz); scalable via MCLK/512 formula up to V.34 rates |
| Dynamic Performance | ADC: 87 dB dynamic range, ≥79 dB SINAD; DAC: 85 dB dynamic range, ≥80 dB SINAD |
| Power Dissipation | 150 mW max active mode; 2.5 mW typical in hardware power-down mode |
| Analog Supply | AVDD = 5 V only; digital supply DVDD supports 3 V or 5 V operation |
| Reference Voltage | Internal 2.5 V VCOM(ADC) and VCOM(DAC) outputs, each decoupled with 0.1 µF ceramic capacitor |
Pinout & Package
Package: TQFP-48 (PT package, 48-pin quad flat pack), 7 mm × 7 mm body, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INM | Differential ADC input | Primary analog input pair requiring external RC antialias filter; referenced to VCOM(ADC) |
| OUTP / OUTM | Differential DAC current output | Complementary current outputs; must be loaded differentially with ≤5 kΩ for proper voltage swing |
| DIN / DOUT | Serial data I/O | 16-bit 2's-complement data path; DOUT high-Z when FS inactive; synchronized to SCLK |
| MCLK / SCLK / FS / FC | Timing and control inputs | MCLK drives internal clocks; SCLK shifts data; FS initiates frame sync; FC selects secondary commands |
| PWRDWN / RESET | Power and initialization control | PWRDWN enables low-power state without register loss; RESET clears all registers to defaults |
| FILT / VCOM(ADC) / VCOM(DAC) | Internal reference outputs | FILT provides 2.5 V bandgap reference; VCOM pins supply 2.5 V common-mode bias for analog sections |
Key Features
| Feature | Design Value |
|---|---|
| Dual sigma-delta architecture | Fourth-order modulators with 64× oversampling in both ADC and DAC paths enable high-resolution, low-cost voice-band conversion |
| Integrated digital filtering | On-chip decimation (ADC) and interpolation (DAC) FIR filters eliminate need for external DSP-based resampling |
| Flexible power configuration | Independent AVDD (5 V) and DVDD (3 V or 5 V) supplies allow mixed-voltage system integration and reduced digital noise coupling |
| Digital loopback test mode | Hardware-configurable internal ADC-to-DAC path enables in-system functional validation without external signal routing |
| Phone-mode flag control | FLAG0/FLAG1 outputs programmable via Control 2 register for handshake signaling in modem and telephony applications |
Applications
| Modem Data Access Arrangement (DAA) | Voice-Front-End for Embedded PBX |
|---|---|
Use Scenario: Interface between digital signal processor and analog telephone line in V.34-compliant modem design. IC Role / Device Role / Timing Role: Analog interface IC handling bidirectional 8 kHz voice-band conversion, clocked by MCLK-derived SCLK and FS. Use Value: Eliminates need for external antialiasing and reconstruction filters due to integrated decimation/interpolation and differential architecture. |
Use Scenario: Audio front-end in enterprise IP phone or VoIP gateway requiring low-noise analog signal conditioning. IC Role / Device Role / Timing Role: Sigma-delta ADC/DAC serving as central analog transceiver, synchronized to host DSP via primary serial interface. Use Value: 87 dB ADC SNR and 85 dB DAC dynamic range meet ITU-T G.711 requirements for wideband voice clarity. |
| Industrial Voice Recorder | Legacy Telecom Terminal Equipment |
Use Scenario: Low-power voice logging module in security or building automation systems operating over extended temperature range. IC Role / Device Role / Timing Role: Standalone analog interface providing continuous 8 kHz sampling with hardware power-down between recording sessions. Use Value: 2.5 mW power-down dissipation extends battery life; internal VCOM references simplify PCB layout and reduce BOM count. |
Use Scenario: Replacement analog interface in discontinued telecom terminal hardware requiring drop-in compatibility with existing firmware. IC Role / Device Role / Timing Role: Pin- and register-compatible sigma-delta AIC maintaining identical serial protocol and timing behavior as predecessor parts. Use Value: Software-defined configuration (via Control 1/2 registers) allows reuse of legacy driver code without hardware revision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog interface circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC320AC04CP | 14-bit resolution, no auxiliary input channel, single 5-V supply only, lower dynamic range (78 dB ADC) | Limited to basic voice codec applications without auxiliary monitoring or dual-supply flexibility | Select when cost sensitivity outweighs resolution and feature requirements; verify register map compatibility |
| TLV320AIC10IPFB | Later-generation 16-bit sigma-delta AIC with integrated PGA, higher integration, 3.3-V-only operation | Requires board-level voltage translation if interfacing with 5-V logic; supports wider sample rates (up to 48 kHz) | Prefer for new designs needing enhanced analog front-end features; not pin-compatible with TLC320AD56CPT |
Compared with TLC320AC04CP, the TLC320AD56CPT delivers 3 dB higher ADC SNR and dual-supply support; compared with TLV320AIC10IPFB, it retains 5-V logic compatibility and simpler power sequencing but lacks programmable gain and higher sample-rate capability.
Availability
TLC320AD56CPT is available at Aetrix Electronics and suitable for legacy telecom infrastructure, industrial voice recorders, and embedded modem designs requiring stable component supply and long-term obsolescence management.
Supply support for TLC320AD56CPT 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 company founded in 1930, specializing in analog, embedded processing, and power management technologies for industrial, automotive, and communications markets.
The TLC320AD56CPT belongs to TI's legacy sigma-delta analog interface family, designed specifically for cost-sensitive, low-speed voice-band signal conversion in telecom and business audio equipment.
FAQ
What is the maximum master clock frequency supported by the TLC320AD56CPT?
The TLC320AD56CPT does not specify an absolute maximum MCLK value in its datasheet, but operational characterization is provided at 4.096 MHz (for 8 kHz fs) and 8.192 MHz (for DAC path testing). The device derives all internal clocks from MCLK, and the conversion rate is fixed at MCLK/512 - so scaling MCLK directly scales fs. For V.34 compliance, MCLK up to 12.288 MHz (yielding 24 kHz fs) is supported per TI application guidance.
Does the TLC320AD56CPT require external antialiasing or reconstruction filters?
The TLC320AD56CPT integrates a fourth-order sigma-delta ADC with decimation filter and a sigma-delta DAC with interpolation filter, significantly reducing out-of-band noise. However, external RC antialias filters are required on INP/INM and AUXP/AUXM inputs per datasheet Section 1.5, and external low-pass filtering is recommended on OUTP/OUTM outputs to suppress residual high-frequency quantization noise - especially in sensitive audio applications.
Can the TLC320AD56CPT operate with DVDD = 3 V while AVDD remains at 5 V?
Yes, the TLC320AD56CPT explicitly supports mixed-supply operation: AVDD = 5 V (analog section only) and DVDD = 3 V (digital I/O and logic), as specified in Section 4.2.2 of the datasheet. This configuration reduces digital switching noise coupling into analog circuits and is validated across the full 0°C to 70°C operating range.
How is digital loopback enabled on the TLC320AD56CPT?
Digital loopback on the TLC320AD56CPT is enabled by setting bit D06 (Loopback Enable) in Control 1 register (Register 1) during secondary serial communication. Once activated, the ADC output data is internally routed to the DAC input path, allowing end-to-end digital path verification without external analog connections - a key diagnostic function confirmed in Section 2.1.10.
What is the function of the FILT pin on the TLC320AD56CPT?
The FILT pin on the TLC320AD56CPT provides the 2.5 V bandgap reference voltage used internally for biasing analog circuitry. It must be decoupled with a 0.1 µF ceramic capacitor to ground, as stated in Section 1.5. This node is intended only for high-impedance DC loads - connecting active circuitry or AC-coupled signals to FILT violates the datasheet specification and may degrade reference stability and ADC/DAC performance.
TLC320AD56CPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Data Interface:
- -
- Resolution (Bits):
- -
- Number of ADCs / DACs:
- -
- Sigma Delta:
- -
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
TLC320AD56CPT FAQ
1.How can I place an order for TLC320AD56CPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC320AD56CPT 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 TLC320AD56CPT reliable?
The price and inventory of TLC320AD56CPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC320AD56CPT is usually 5 days.
3.What payment methods are accepted for TLC320AD56CPT?
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4.How is shipping managed for TLC320AD56CPT?
TLC320AD56CPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC320AD56CPT 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 TLC320AD56CPT?
For technical support, including TLC320AD56CPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC320AD56CPT requirements.
6.How does Aetrix verify that TLC320AD56CPT is sourced from the original manufacturer or authorized distributors?
All TLC320AD56CPT 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 TLC320AD56CPT meets industry standards.
7.What is the process for return or replacement of TLC320AD56CPT?
All TLC320AD56CPT units undergo pre-shipment inspection (PSI). If there is an issue with TLC320AD56CPT, 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 TLC320AD56CPT part is unused and in its original packaging.
Return procedure for TLC320AD56CPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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