PCM3500E - 16-Bit Mono Voice Codec | Texas Instruments
N.º da peça: PCM3500E ✓ AtivoPCM3500E Visão geral
A voice codec is a mixed-signal integrated circuit that converts an analog voice signal into a digital bitstream and reconstructs a digital audio stream into an analog signal. In the product hierarchy, PCM3500E is a SoundPlus voice codec, a specialized audio codec, and therefore part of the broader amplifier, interface, and power-management ecosystem. Its mono architecture is appropriate for one speech channel, modem equipment, and portable voice terminals where power consumption and board area are important.
The 16-bit resolution provides the primary signal representation for the voice path, while the delta-sigma modulator and decimation filter implement the conversion from analog voice information to a serial digital stream. The integrated power-down function supports systems that need to reduce consumption when the codec is not active. The 2.7 V to 3.6 V operating range aligns with low-voltage digital systems and portable equipment supplied from 3.3 V rails.
The PCM3500E is designed for modem analog front-end and speech-processing applications. Its mono single-to-differential input stage is intended to provide a differential signal to the internal modulator, helping the converter operate with its intended signal structure. The serial interface provides the digital connection between the codec and a host processor, digital signal processor, or communications controller.
Engineers should pay close attention to the 24-SSOP footprint, analog input routing, reference requirements, bypass capacitors, serial-interface timing, and the 2.7 V to 3.6 V supply limits. Because the device is designed around a voice-band signal chain, microphone and line-level inputs require appropriate gain and impedance conditioning before reaching the converter.
This page combines the manufacturer product description with practical application guidance, pin and packaging information, selection criteria, and a comparison framework for engineers evaluating codec upgrades or replacements. It emphasizes the PCM3500E's 16-bit mono architecture, low-voltage operation, integrated power-down capability, and suitability for compact voice and modem equipment.
Alternativas drop-in para PCM3500E — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
PCM3500E/2K
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PCM3500EG4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PCM3500E Especificações
| Device Type | 16-bit mono SoundPlus voice/modem codec |
| Bit Resolution | 16 bit |
| Channel Configuration | Mono |
| Supply Voltage Range | 2.7 V to 3.6 V |
| Architecture | Delta-sigma modulator |
| Modulator Order | 5th order |
| Input Conversion | Mono single-to-differential converter |
| Output Conversion | Fully differential delta-sigma modulator |
| Digital Filtering | Decimation filter with digital high-pass filter |
| Power-Down Function | Integrated |
| Tipo de interface | Serial |
| Signal Type | Voice-band |
| Primary Applications | Modem analog front end and speech processing |
| Encapsulamento | 24-SSOP (0.209 inch, 5.30 mm width) |
| Tipo de montagem | Surface mount |
Guia de Configuração de Pinos do PCM3500E 24-ssop (0.209 inch, 5.30 mm width)
Configuração de pinos para PCM3500E (pacote 24-ssop (0.209 inch, 5.30 mm width)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para PCM3500E.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PCM3500E é adequado para 6 aplicaçãos: Modem Voice Front End, Speech Processing Terminal, Portable Voice Communications, Voice Recording Module, Industrial Voice Control Panel, Telephone Interface Equipment.
Modem Voice Front End
The PCM3500E fits a modem analog front end that needs one high-resolution voice conversion channel on a 3.3 V-class supply. Its 16-bit mono conversion, single-to-differential input stage, and fifth-order delta-sigma modulator form a compact signal path between a microphone or line input and the modem's digital processor. The 2.7 V to 3.6 V operating range supports portable equipment, while integrated power-down helps reduce consumption when the call path is inactive. The serial interface allows the codec to connect directly to a communications controller or DSP. Designers should condition the analog input to the required level and impedance, stabilize the reference as directed by the Texas Instruments datasheet, and provide local bypass capacitance with careful separation between analog and digital return currents.
Recomendado
Speech Processing Terminal
The PCM3500E is appropriate for compact speech-processing terminals in which one mono voice channel must be converted between analog and digital domains. Its 16-bit format provides the stated resolution for voice capture and playback, while the integrated digital high-pass function and decimation filtering form part of the voice-band conversion path. The 24-SSOP package limits board footprint, and the 2.7 V to 3.6 V supply range aligns with portable embedded systems. A system designer can place the codec beside the audio connector and route its serial data to an embedded processor. Performance depends on correct analog gain staging, reference stability, and layout, so follow the manufacturer pin and application diagrams rather than relying on the functional block description alone.
Recomendado
Portable Voice Communications
The PCM3500E supports portable voice-communications equipment that operates from a 2.7 V to 3.6 V supply and needs one mono analog-to-digital and digital-to-analog path. The low-voltage, low-power positioning is important in battery-operated systems, and the integrated power-down mode allows the codec to be disabled during inactive periods. Its integrated delta-sigma conversion, decimation filtering, digital high-pass filter, and serial interface reduce the number of separate mixed-signal blocks required for a voice channel. The 24-SSOP package also supports compact layouts. In a portable product, verify regulator headroom, bypass-capacitor selection, analog input range, and the host processor's serial-interface timing before release.
Recomendado
Voice Recording Module
A standalone voice-recording module can use the PCM3500E to convert one analog speech channel into a serial digital stream. The 16-bit mono resolution suits voice-band capture, while the internal single-to-differential converter and fifth-order delta-sigma modulator provide a consolidated analog front end. The serial output can feed a microcontroller, DSP, or storage controller, reducing the need for a separate converter. Because the codec is optimized for a voice-band signal path rather than arbitrary full-band audio, designers should evaluate microphone gain, anti-aliasing behavior, reference settling, and clocking against the target recording bandwidth. The 2.7 V to 3.6 V supply range supports low-voltage modules with local decoupling.
Recomendado
Industrial Voice Control Panel
The PCM3500E can serve the voice input section of an industrial control panel that accepts one mono microphone or communication line. Its 16-bit conversion and integrated voice-band filtering provide a compact interface to a panel controller, while the 2.7 V to 3.6 V supply range makes it practical for embedded 3.3 V control electronics. The 24-SSOP footprint allows routing to a compact analog island, and the serial interface supports deterministic communication with the controller. For industrial environments, confirm the supported temperature range, isolate noisy switching supplies, and maintain controlled grounding around the analog input. The Texas Instruments datasheet should govern input conditioning, reference components, bypass placement, and exposed test points.
Recomendado
Telephone Interface Equipment
PCM3500E is suitable for telephone-interface equipment requiring a single voice channel in a compact mixed-signal design. The integrated mono conversion path removes the need for a separate high-resolution ADC, DAC, and associated decimation stage in a basic voice subsystem. Its low-voltage operation supports 3.3 V-class telephone equipment, and the serial interface allows a modem or speech processor to manage channel data. The fully differential fifth-order delta-sigma modulator and single-to-differential input structure should be implemented with the manufacturer reference network and layout. Designers should also account for line-interface gain, echo-path hardware not contained in the codec, digital timing, and power-down behavior when integrating PCM3500E into a complete telephone signal chain.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PCM3500E — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PCM3500E/2K | PCM3500EG4 |
|---|---|---|---|
| Package | 24-SSOP | 24-SSOP | 24-SSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Codec Type | Mono SoundPlus voice/modem codec | Mono SoundPlus voice/modem codec | Mono SoundPlus voice/modem codec |
| Bit Resolution | 16 bit | 16 bit | 16 bit |
| Supply Voltage Range | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Power-Down Function | Integrated | Integrated | Integrated |
| Converter Architecture | Fully differential 5th-order delta-sigma modulator | Fully differential 5th-order delta-sigma modulator | Fully differential 5th-order delta-sigma modulator |
| Digital Filtering | Decimation filter with digital high-pass filter | Decimation filter with digital high-pass filter | Decimation filter with digital high-pass filter |
| Interface Type | Serial | Serial | Serial |
| Primary Applications | Modem analog front end and speech processing | Modem analog front end and speech processing | Modem analog front end and speech processing |
Principais diferenciais
- Integrated one-channel voice conversion path (vs PCM3500E/2K)
- Low-voltage mono codec positioning (vs PCM3500EG4)
- Compact mixed-signal integration (vs PCM3500E/2K)
Notas de projeto
Use the Texas Instruments PCM3500 datasheet pin table to assign the 24-SSOP footprint and place required bypass capacitors close to their associated pins. Keep the analog input path away from serial clock and data traces, provide a continuous ground reference beneath the analog section, and route high-current digital return paths separately. The delta-sigma modulator and internal filtering do not remove the need for careful passive layout, so verify the reference and bypass networks against the manufacturer layout.
Operate PCM3500E only within its 2.7 V to 3.6 V supply range and include local high-frequency bypass at the supply pins. If the codec shares a board with switching circuitry, isolate its analog section and avoid routing switching-node copper beneath the SSOP. Confirm startup sequencing, power-down control behavior, and reference settling in the intended host configuration. A stable supply and reference are especially important because both voice conversion accuracy and integrated power-down behavior depend on valid operating conditions.
Do not select a PCM3500 family suffix from the product description alone. Before substituting PCM3500E/2K or PCM3500EG4, compare the exact package drawing, pin numbers, electrical limits, interface timing, and ordering configuration with PCM3500E. A shared 24-SSOP format and common codec description are necessary checks but do not replace a complete pin and specification review for production use.
Informações de conformidade
No specific environmental or process-compliance claims were identified for PCM3500E. The AEC-Q100 field is not applicable because PCM3500E is a voice codec rather than an automotive-qualified power semiconductor.
