Texas Instruments TLV320AIC1107PWG4

Overview

TLV320AIC1107PWG4 from Texas Instruments is a single-chip PCM audio codec IC designed for voice-band telephony interfaces, performing A/D and D/A conversion, transmit/receive filtering, and volume control in 2.7–3.3 V systems. It supports 13-bit linear or 8-bit A-law companding, operates with a 2.048-MHz master clock, delivers 300-Hz to 3.4-kHz passband, and drives 8–32-Ω earphone loads - deployed in digital handsets and PABX terminals.

For engineers reviewing the TLV320AIC1107PWG4 datasheet, TLV320AIC1107PWG4 pinout, TLV320AIC1107PWG4 application, or TLV320AIC1107PWG4 equivalent, key selection considerations include its differential microphone input with external gain setting, earphone mute functionality, 8-kHz sampling rate, low 7-mA active supply current, and TSSOP-20 package compatibility with voice-grade telecom signal chains.

Technical Context

The TLV320AIC1107PWG4 integrates a third-order sigma-delta analog modulator for transmit path A/D conversion and a second-order digital modulator/filter for receive path D/A reconstruction. Its PLL locks to the 2.048-MHz MCLK to generate internal clocks for digital filters meeting CCITT G.714 requirements.

Transmit and receive paths each feature independent digital filtering, programmable volume control (linear mode only), and dedicated mute functions (MICMUTE/EARMUTE). The device uses a precision band-gap reference and supports psophometrically weighted noise performance of −74 dBm0p (linear mode) and −88 dBm0 (A-law mode).

Key Specifications

Pinout & Package

TLV320AIC1107PWG4 is housed in a 20-terminal low-profile TSSOP (PW) package per JEDEC MO-153, with 0.65-mm lead pitch and exposed thermal pad not present. Pin numbering follows top-view convention with Pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV320AIC101IPW and PCM3002E, the TLV320AIC1107PWG4 uniquely balances narrowband telephony compliance (G.714, A-law), integrated differential earphone drive, and ultra-low pin-count PCM interface - making it the most direct fit for digital handsets and PABX terminals requiring minimal external components and proven PSTN interoperability.

Availability

TLV320AIC1107PWG4 is available at Aetrix Electronics and suitable for digital handsets, cordless phone base stations, and digital PABX systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLV320AIC1107PWG4 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 TLV320AIC1107PWG4 belongs to TI's voice-band codec product line, engineered specifically for cost-sensitive, low-power telephony endpoints requiring integrated A/D-D/A conversion, filtering, and interface logic without external support components.

FAQ

What is the primary function of the TLV320AIC1107PWG4 in a voice communication system?

The TLV320AIC1107PWG4 serves as a complete PCM voice-band codec, performing analog-to-digital conversion of microphone signals and digital-to-analog conversion of received PCM data, while integrating transmit/receive filtering, volume control, and mute functions. Its design targets telephony-grade fidelity (300–3400 Hz) and supports both 13-bit linear and 8-bit A-law companding modes - making the TLV320AIC1107PWG4 ideal for digital handsets and PABX terminals requiring PSTN interoperability.

How does the TLV320AIC1107PWG4 handle microphone input gain configuration?

The TLV320AIC1107PWG4 provides external gain-setting capability through MICGAIN+ and MICGAIN− pins, enabling precise adjustment of the first-stage microphone amplifier (MIC Amp 1) gain. Using recommended resistor values (R2 = 34 kΩ, R3 = 510 kΩ), it achieves 23.5 dB gain with <1% tolerance resistors. This configurable gain allows optimization of signal-to-noise ratio for different microphone sensitivities - a key capability distinguishing the TLV320AIC1107PWG4 from fixed-gain alternatives.

Can the TLV320AIC1107PWG4 drive low-impedance earphones directly?

Yes, the TLV320AIC1107PWG4 features a differential earphone amplifier output (EAROUT+/EAROUT−) capable of delivering up to 200 mW into an 8-Ω load, 160 mW into 16 Ω, and 100 mW into 32 Ω - all without external components. Its differential architecture suppresses clicks and pops, and the EARMUTE pin provides hardware-controlled muting. This integrated drive capability eliminates the need for external Class-AB amplifiers in space-constrained designs like digital headsets - a core advantage of the TLV320AIC1107PWG4.

What clocking requirements must be met for proper operation of the TLV320AIC1107PWG4?

The TLV320AIC1107PWG4 requires a precise 2.048-MHz master clock (MCLK) applied to the MCLK pin, with jitter ≤37% and transition time ≤10 ns. From this, its internal PLL generates all necessary timing signals. The PCMSYNC frame sync must be derived from MCLK with a 256-cycle division ratio to maintain an 8-kHz sampling rate. An active-low RESET pulse ≥500 ns must be asserted with MCLK running to ensure reliable power-up initialization - these timing constraints are fundamental to stable TLV320AIC1107PWG4 operation.

Does the TLV320AIC1107PWG4 support volume control in both linear and A-law modes?

No - volume control is only available in 13-bit linear mode, implemented via the three least-significant bits (RXVOL[2:0]) of the 16-bit PCMI word. These bits select one of eight gain settings from −18 dB to +3 dB in 3-dB steps. In 8-bit A-law mode, volume is fixed at 0 dB and cannot be adjusted. This functional distinction is explicitly defined by the LINSEL pin state and is a documented behavior of the TLV320AIC1107PWG4 - users requiring programmable gain must operate the TLV320AIC1107PWG4 in linear mode.