Texas Instruments TLV320AIC14IDBT-1

Overview

TLV320AIC14IDBT-1 from Texas Instruments is a low-power, 16-bit sigma-delta voiceband codec with integrated MIC preamp, programmable PGA (–42 dB to +20 dB), antialiasing filter, and SMARTDM serial interface. It supports sampling rates up to 26 kSPS with on-chip IIR/FIR filtering or 104 kSPS with filters bypassed, and operates from 2.7 V–3.6 V analog/I/O and 1.65 V–1.95 V digital core supplies. It targets wireless accessories and hands-free car kits requiring compact, low-noise audio conversion.

For engineers reviewing the TLV320AIC14IDBT-1 datasheet, TLV320AIC14IDBT-1 pinout, TLV320AIC14IDBT-1 application, or TLV320AIC14IDBT-1 equivalent, key selection criteria include its 84-dB ADC SNR (13-kHz BW), 91-dB DAC SNR, support for coarse/fine sampling modes, DLL-dependent clock generation limitations, and TSSOP-30 package compatibility with TI C54x DSP power domains.

Technical Context

The TLV320AIC14IDBT-1 implements a dual-path sigma-delta architecture: a decimation-filtered ADC path with selectable FIR/IIR antialiasing and an interpolation-filtered DAC path with programmable sidetone. Its internal clock generation relies on MCLK division via configurable M/N/P values in Control Register 4, where P=8 enables coarse mode (DLL disabled) and P≠8 activates the problematic delay-locked loop.

It features two independent serial interfaces: SMARTDM (4-wire TDM) supporting up to 16 cascaded codecs with automatic address detection and turbo mode (25 MHz SCLK), plus a 2-wire host port configurable as I²C or S2C. Analog I/O includes differential and single-ended inputs (INP1/INM1, INP2/INM2, MICIN) and outputs (OUTP1/OUTM1), with BIAS output selectable at 1.35 V or 2.35 V.

Key Specifications

Pinout & Package

TLV320AIC14IDBT-1 is housed in a 30-pin TSSOP (DBT) package with exposed thermal pad, optimized for space-constrained portable audio designs. Pin functions are fully defined per SLWS140A Data Manual Section 2.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voiceband codec applications.

Compared with TLV320AIC14IDBT-1, TLV320AIC14CDBT provides identical functionality at lower cost for commercial environments, while TLV320AIC24IDBT delivers superior SNR, lower power, and eliminates the DLL startup risk-making it the preferred upgrade path for new designs requiring long-term reliability.

Availability

TLV320AIC14IDBT-1 is available at Aetrix Electronics and suitable for wireless accessories, automotive hands-free kits, and VoIP handsets requiring stable component supply with industrial temperature support and legacy TI C54x DSP compatibility.

Supply support for TLV320AIC14IDBT-1 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, with decades of leadership in audio signal chain solutions.

The TLV320AIC14IDBT-1 belongs to TI's voiceband codec product line, engineered for ultra-low-power, high-SNR audio conversion in portable and automotive voice interfaces where compact size and DSP integration are critical.

FAQ

What is the primary clocking limitation affecting TLV320AIC14IDBT-1 reliability?

The TLV320AIC14IDBT-1 contains a known delay-locked loop (DLL) startup issue: when P ≠ 8 in Control Register 4, the DLL may fail to initialize, disabling the master clock and halting codec operation. TI recommends using coarse sampling mode (P = 8) exclusively. This constraint is documented in Product Notification SLWS140 and applies to all TLV320AIC14 variants including TLV320AIC14IDBT-1.

Does TLV320AIC14IDBT-1 support both I²C and SPI host interfaces?

No-TLV320AIC14IDBT-1 supports only a 2-wire programmable host port configurable as either I²C or S2C (start-stop communication), not SPI. The SCLK, DIN, DOUT, and FS lines belong to the separate 4-wire SMARTDM serial interface used for audio data transfer. Host register access must use SDA/SCL pins in I²C mode or SDA/SCL in S2C mode, as defined in Section 3.7 of SLWS140A.

What analog input configurations does TLV320AIC14IDBT-1 support?

TLV320AIC14IDBT-1 supports three analog input topologies: (1) single-ended MICIN with internal bias, (2) differential INP1/INM1 pair, and (3) differential INP2/INM2 pair. Each input path includes a programmable PGA (–42 dB to +20 dB, 1-dB steps). Unused inputs must be tied to AVSS per Section 2.2 of SLWS140A to prevent noise coupling.

How does TLV320AIC14IDBT-1 achieve low power consumption in portable systems?

TLV320AIC14IDBT-1 achieves 10-mW typical power via multiple strategies: separate 1.65–1.95 V digital core supply (DVDD), 2.7–3.6 V analog/I/O domains, hardware PWRDN pin for 30-µW standby, and independent software control to disable ADC, DAC, op-amps, or IIR/FIR filters. Its sigma-delta architecture and SMARTDM turbo mode also reduce DSP processing overhead, lowering overall system power.

Is TLV320AIC14IDBT-1 pin-compatible with other TLV320AICxx codecs?

No-TLV320AIC14IDBT-1 uses a unique 30-pin TSSOP (DBT) package and is not pin-compatible with TLV320AIC24, TLV320AIC3100, or other family members. While functional similarities exist (e.g., SMARTDM, host port), pin assignments for analog I/O, power domains, and control signals differ significantly. Migration requires PCB redesign and firmware adaptation.