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Texas Instruments TLC320AD545PTR
- Part No.:
- TLC320AD545PTR
- Manufacturer:
- Texas Instruments
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
TLC320AD545PTR.pdf
- Description:
- IC DATA/FAX CODEC 1CH 48-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,060
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Product details
Overview
TLC320AD545PTR from Texas Instruments is a single-channel mixed-signal data/fax codec IC integrating 16-bit sigma-delta ADC/DAC, analog hybrid circuitry, programmable gain amplifier, 8-Ω AT41 speaker driver, and flash write enable circuitry. It operates at sample rates up to 11.025 kHz with 80 dB SNR+D for ADC and 78 dB SNR+D for DAC, supporting telecom line interface applications requiring differential or single-ended analog interfacing.
For engineers reviewing the TLC320AD545PTR datasheet, TLC320AD545PTR pinout, TLC320AD545PTR application, or TLC320AD545PTR equivalent, key selection considerations include its dual-supply flexibility (5 V/3.3 V analog/digital/monitor rails), software power-down mode, FS high/low serial interface modes, transformer reference voltage (2.5 V/1.5 V), and integrated loopback test capability for in-circuit validation.
Technical Context
The TLC320AD545PTR implements oversampling sigma-delta architecture with internal decimation (ADC) and interpolation (DAC) filters, deriving DT_FS = DT_MCLK/512 and DT_SCLK = DT_MCLK/2. Its analog signal path includes programmable-gain receive amplifiers (DTRXP/DTRXM), transmit buffers (DT_BUFP/DT_BUFM), and hybrid feedback node (DTRX_FB) for external RC pole/gain tuning.
Digital control is handled via a 16-bit serial port supporting primary (conversion data) and secondary (register access) communication, where D0 of DT_DIN triggers register reads/writes to Control Register 1 and 2. The device lacks hardware power-down but supports software-initiated reset of internal counters while preserving register contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sample Rate | Up to 11.025 kHz - sets maximum voice/data channel bandwidth in fax/modem systems |
| ADC SNR+D | 80 dB at fs = 8 kHz - defines dynamic range for analog input digitization accuracy |
| DAC SNR+D | 78 dB at fs = 8 kHz - determines fidelity of reconstructed analog output signal |
| Resolution | 16-bit 2s-complement - ensures linear quantization step size and digital interface compatibility |
| Power Supplies | DAVDD/DVDD/MVDD: 5 V or 3.3 V - enables flexible rail selection across analog, digital, and monitor domains |
| Reference Voltage | DT_REF = 2.5 V (5 V supply) or 1.5 V (3.3 V supply) - provides bias for transformer-coupled line interfaces |
| Flash Write Enable | FLSH_OUT supplies ≤45 mA at 5 V - powers external flash memory (e.g., Intel 28F400B) during write/erase |
Pinout & Package
Package: 48-pin TQFP (PT), RoHS-compliant, operating temperature range –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DREFP_ADC (47) | ADC reference filter output | Provides 3.375 V (5 V supply) or 2.25 V (3.3 V supply) bandgap reference; requires 0.1 µF capacitor to DREFM_ADC |
| DT_DIN (33) | Digital input | Receives 15-bit DAC data + D0 secondary request bit; MSB-first, 2s-complement format |
| DT_DOUT (31) | Digital output | Transmits 16-bit ADC data synchronized to DT_SCLK; high-impedance when DT_FS inactive |
| DT_FS (30) | Frame sync | Active-high (FS high mode) or active-low (FS low mode) signal marking start/end of data transfer |
| DT_SCLK (32) | Shift clock | DT_MCLK/2 rate clock driving serial data sampling; edge-aligned with DT_DIN/DT_DOUT transitions |
| DTTX_OUTP (14) | Analog transmit output | Noninverting output of transmit amplifier; used with DTTX_OUTM for differential line drive |
| MONOUTP (40) | Monitor speaker output | 0 dB or muted 8-Ω differential speaker driver output for AT41 call progress tone generation |
Key Features
| Feature | Design Value |
|---|---|
| Differential/single-ended analog I/O | Supports both configurations via DT_REF bias and external hybrid resistor networks |
| Programmable gain amplifier | 0/6/12/18 dB gain on receive path (DTRXP/DTRXM); 0/–6/–12/–18 dB on buffer outputs (DT_BUFP/DT_BUFM) |
| Analog/digital loopback | Enables system-level self-test: analog loopback (DAC→ADC) and digital loopback (ADC→DAC) via control registers |
| Software power-down mode | Resets internal counters without clearing control registers - preserves configuration during idle periods |
| Transformer reference (DT_REF) | 2.5 V (5 V supply) or 1.5 V (3.3 V supply) with ±2.5 mA sourcing/sinking - eliminates need for external bias network |
Applications
| Telephone Line Interface | Fax Modem Data Channel |
|---|---|
Use Scenario: Connecting microcontroller-based embedded modem to POTS line via transformer-coupled analog front-end. IC Role / Device Role / Timing Role: Single-channel codec performing A/D and D/A conversion, hybrid signal conditioning, and AT41 speaker monitoring. Use Value: Integrated 600-Ω PGA, 8-Ω speaker driver, and DT_REF bias reduce BOM count and layout complexity for Class 1/2 fax compliance. |
Use Scenario: Real-time fax image data encoding/decoding in office multifunction peripherals with limited PCB area. IC Role / Device Role / Timing Role: Codec providing 11.025 kHz max sample rate and 16-bit resolution for G3 fax standard support. Use Value: 80 dB ADC SNR+D and 78 dB DAC SNR+D meet ITU-T V.27/V.29 signal integrity requirements. |
| Voice Band Data Terminal | Embedded Call Progress Monitor |
Use Scenario: Industrial remote terminal unit transmitting telemetry over legacy phone lines using V.22bis protocol. IC Role / Device Role / Timing Role: Mixed-signal interface converting UART data to analog line signals and vice versa. Use Value: Dual-supply operation (5 V analog / 3.3 V digital) allows direct interfacing with modern low-voltage MCUs while maintaining line-driving headroom. |
Use Scenario: Generating audible dial tone, busy signal, and ringback in VoIP gateway or PBX add-on module. IC Role / Device Role / Timing Role: Monitor speaker driver delivering AT41-compliant tones via MONOUTP/MONOUTM outputs. Use Value: Programmable 0 dB gain or mute control (Register 2) enables precise tone amplitude management without external amplification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data/fax codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV320AIC10IPFB | 2-channel, 16-bit sigma-delta codec with integrated PLL; no flash write enable or AT41 driver | Targets multi-channel audio/data systems; lacks dedicated fax line driver and transformer reference | Choose for higher channel count or PLL-based clock synthesis; not drop-in for single-line fax designs |
| CS42L52-CNZ | Ultra-low-power stereo audio codec; 94 dB ADC SNR+D; no hybrid circuitry or line-driver capability | Optimized for portable voice UI; lacks POTS line interface features (DT_REF, DTRX_FB, FLSH_OUT) | Prefer for battery-powered voice recorders; unsuitable for telecom line coupling or flash memory support |
Compared with TLV320AIC10IPFB and CS42L52-CNZ, the TLC320AD545PTR uniquely integrates transformer reference, hybrid feedback nodes, and flash write enable-making it specifically tailored for cost-sensitive, single-channel fax/data modems requiring minimal external components and legacy line interface compliance.
Availability
TLC320AD545PTR is available at Aetrix Electronics and suitable for telephone line interface, fax modem data channel, and embedded call progress monitor applications requiring stable component supply across industrial and telecom equipment lifecycles.
Supply support for TLC320AD545PTR 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 specializing in analog, embedded processing, and connectivity technologies with broad industrial and communications portfolio coverage.
The TLC320AD545PTR belongs to TI's legacy mixed-signal data/fax codec product line, designed specifically for POTS-based modem, fax, and voice-band data terminal applications requiring integrated analog front-end, serial interface, and line-driver functionality.
FAQ
What is the maximum sample rate supported by the TLC320AD545PTR?
The TLC320AD545PTR supports a maximum sample rate of 11.025 kHz, derived from the master clock using DT_FS = DT_MCLK / 512. This rate satisfies ITU-T V.22bis and V.27ter fax standards and enables full voice-band data transmission. The actual achievable rate depends on stable DT_MCLK input and proper timing margin adherence per Section 3.1 of the SLAS206C datasheet.
Does the TLC320AD545PTR support both 5-V and 3.3-V supply configurations?
Yes, the TLC320AD545PTR supports three validated supply configurations: (1) 5 V for all rails (DAVDD/DVDD/MVDD), (2) 3.3 V for all rails, and (3) mixed 5 V analog/monitor with 3.3 V digital. DT_REF scales accordingly (2.5 V or 1.5 V), and reference voltages DREFP_ADC/DREFP_DAC adjust to 3.375 V or 2.25 V - enabling interoperability with both legacy and modern logic families without level-shifting.
How does the flash write enable function work on the TLC320AD545PTR?
The TLC320AD545PTR's FLSH_OUT pin delivers up to 45 mA at 5 V when FLSH_IN is pulled low, powering external flash memory devices like Intel 28F400B or AMD Am29F400 during write/erase cycles. This circuit draws power from DVDD and is independent of analog supplies - ensuring reliable flash programming without loading sensitive analog rails or requiring external charge pumps.
Can the TLC320AD545PTR operate in analog loopback mode for testing?
Yes, the TLC320AD545PTR supports analog loopback by setting bit D4 in Control Register 1, routing DAC output directly to ADC input. This validates the full signal chain - including sigma-delta modulation, interpolation/decimation filtering, and PGA stages - while excluding hybrid amplifier effects. Loopback is synchronized to DT_FS and requires no external connections beyond standard serial interface wiring.
What package type and pin count does the TLC320AD545PTR use?
The TLC320AD545PTR uses a 48-pin plastic quad flatpack (PT, TQFP) package with 0.5 mm pitch, specified for operation from –40°C to +85°C. Pin assignments match the SLAS206C datasheet Terminal Assignments diagram (page 1–3), including dedicated analog/digital/monitor power pins, serial interface signals (DT_DIN/DT_DOUT/DT_FS/DT_SCLK), and hybrid interface terminals (DTRXP/DTRXM/DTRX_FB).
TLC320AD545PTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Data/Fax
- Data Interface:
- Serial
- Resolution (Bits):
- 16 b
- Number of ADCs / DACs:
- 1 / 1
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 78 / 80
- Dynamic Range, ADCs / DACs (db) Typ:
- 80 / 80
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
TLC320AD545PTR FAQ
1.How can I place an order for TLC320AD545PTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC320AD545PTR 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 TLC320AD545PTR reliable?
The price and inventory of TLC320AD545PTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC320AD545PTR is usually 5 days.
3.What payment methods are accepted for TLC320AD545PTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC320AD545PTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC320AD545PTR?
TLC320AD545PTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC320AD545PTR 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 TLC320AD545PTR?
For technical support, including TLC320AD545PTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC320AD545PTR requirements.
6.How does Aetrix verify that TLC320AD545PTR is sourced from the original manufacturer or authorized distributors?
All TLC320AD545PTR 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 TLC320AD545PTR meets industry standards.
7.What is the process for return or replacement of TLC320AD545PTR?
All TLC320AD545PTR units undergo pre-shipment inspection (PSI). If there is an issue with TLC320AD545PTR, 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 TLC320AD545PTR part is unused and in its original packaging.
Return procedure for TLC320AD545PTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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