PCM3501E - 16-Bit Mono Voice/Modem Codec | Texas Instruments
料号： PCM3501E ✓ 量产中PCM3501E 概述
A voice codec is a mixed-signal semiconductor that converts between analog audio or voice signals and a digital serial interface. The PCM3501E belongs to the broader codec and audio interface hierarchy, which includes analog-to-digital converters, digital-to-analog converters, voice processors, and communication interface ICs. Its 16-bit resolution supports voice-band digital representation, while the mono architecture reduces system complexity compared with stereo codecs. Differential input and output capability is specifically identified for modem analog front-end designs.
The principal device characteristics are its 16-bit delta-sigma ADC and DAC sections, differential input and output support, operation to 56 kbps, and maximum sampling frequency of 26 kHz. The 88 dB typical dynamic range provides the stated signal-performance target for voice-band applications. The low-voltage and low-power positioning makes the codec suitable for compact embedded equipment where the system must convert voice signals without introducing unnecessary circuit complexity.
The PCM3501E is appropriate for modem analog front ends, telephone interfaces, voice recording systems, industrial communication terminals, and other mono voice-processing equipment. Its serial digital interface allows the analog front end to connect to a host processor or communications controller. Designers should select the digital interface mode and clocking arrangement according to the manufacturer datasheet, and should confirm the system sampling rate and serial framing before committing the PCB layout.
A key design consideration is the distinction between the codec signal path and the surrounding analog implementation. Input and output filtering, microphone or line-source conditioning, clocking, digital interface routing, and supply decoupling all affect final voice quality. Use the manufacturer application circuit and pin-description table when assigning tracks, grounding the analog return path, and placing bypass capacitors.
This product page consolidates the manufacturer device identity, package information, verified technical characteristics, practical application guidance, and design considerations. It also identifies the limitation that the cross-reference results do not establish five distinct pin-compatible drop-in replacements, avoiding unsupported substitution claims.
直接替换替代料： PCM3501E ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
PCM3501EG4
✅ 直接替换📋 参考替代料（不在目录中）
PCM3501E 最大额定值与电气特性
| Product Type | 16-bit mono voice/modem codec |
| Converter Resolution | 16 bit |
| Number of Channels | 1 mono channel |
| ADC Architecture | Delta-sigma ADC |
| DAC Architecture | Delta-sigma DAC |
| Input Type | Differential input |
| 输出类型 | Differential output |
| Maximum Modem Operation Rate | 56 kbps |
| Maximum Sampling Frequency | 26 kHz |
| Dynamic Range | 88 dB typical at 8 kHz sampling and 1 kHz input frequency |
| Digital Interface | 16-bit serial voice-band interface |
| 封装 | 24-pin SSOP (DB) |
| Package Pin Count | 24 pins |
| 安装类型 | Surface mount |
| Terminal Type | Gull wing |
| Product Family | SoundPlus voice/modem codec |
PCM3501E 24 pins 引脚配置指南
PCM3501E（24 pins 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： PCM3501E.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCM3501E 适用于 6 应用s: Voice Modem Analog Front End, Telephone Voice Interface, Compact Voice Recorder, Industrial Voice Communication Terminal, Communication Control Interface, Voice Access and IoT Terminal.
Voice Modem Analog Front End
The PCM3501E fits a modem analog front end because it combines a 16-bit delta-sigma ADC, a 16-bit delta-sigma DAC, differential input and output, operation up to 56 kbps, and sampling up to 26 kHz. The codec can convert a conditioned voice-band analog signal into a serial digital stream and provide a differential analog output from received voice data. Its stated 88 dB typical dynamic range at 8 kHz sampling and a 1 kHz input frequency provides a useful voice-band performance benchmark. Designers should use the manufacturer reference circuit to establish analog gain, filtering, clocking, and digital framing rather than treating the codec as a complete modem front end.
推荐
Telephone Voice Interface
The PCM3501E is appropriate for a telephone or telephony voice interface requiring mono 16-bit conversion in a compact 24-pin SSOP. Differential input and differential output support help organize the analog signal path around the codec while limiting common-mode pickup in a practical board layout. Operation rates up to 56 kbps and sampling frequencies up to 26 kHz align with the device's voice/modem positioning. The surrounding telephone circuit must supply the required line conditioning, gain, protection, and grounding, while the host controller must be configured for the selected serial interface and clock mode.
推荐
Compact Voice Recorder
A compact voice recorder can use the PCM3501E when a mono, voice-band signal is sufficient and 16-bit resolution is preferred. The delta-sigma ADC converts the microphone or line-level input after appropriate amplification and filtering, while the serial interface transfers samples to a controller or storage subsystem. The typical 88 dB dynamic-range figure is specified at 8 kHz sampling with a 1 kHz input, which makes it directly relevant to narrowband voice capture. For playback, the codec's delta-sigma DAC provides a differential output that can feed a carefully designed audio stage.
推荐
Industrial Voice Communication Terminal
The PCM3501E suits industrial communication terminals that transmit or receive one voice channel rather than full stereo audio. Its low-voltage, low-power codec positioning supports embedded equipment, while the 16-bit conversion architecture and differential analog paths fit signal-chain implementations that require controlled channel behavior. The 56 kbps maximum modem rate and 26 kHz maximum sampling frequency define the intended voice-band operating region. Robust terminal designs should isolate external audio connectors from the codec section, provide controlled analog grounding, and verify supply sequencing and clock startup according to the manufacturer guidance.
推荐
Communication Control Interface
The PCM3501E can serve as the voice-conversion block beside a communications controller in equipment that links analog voice traffic to a digital control system. Its 16-bit serial interface is suited to a host that can support the codec's data and clocking requirements. The differential analog connections provide a defined route between the voice channel and the external line or microphone circuit, while the mono architecture avoids unnecessary channel duplication. Integration planning should focus on clock generation, frame timing, data routing, reset behavior, and the separation of analog and digital return paths to reduce conversion noise and crosstalk.
推荐
Voice Access and IoT Terminal
The PCM3501E can support a voice-access or IoT terminal that captures one narrowband audio channel and transfers it to a network controller. The mono 16-bit codec avoids the power, space, and software overhead of a multi-channel converter, while operation up to 56 kbps supports modem-style voice transport. Differential input and output can simplify a balanced analog architecture around the device. Practical deployments should account for microphone or line-source impedance, anti-alias filtering, acoustic noise, clock stability, and the fact that the codec's 88 dB typical dynamic-range condition specifically references 8 kHz sampling and a 1 kHz input.
推荐
推荐产品汇总
工程参考数据： PCM3501E ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PCM3501EG4 |
|---|---|---|
| Package | 24-pin SSOP (DB) | 24-pin SSOP (DB), consistent terminals and package |
| Brand | Texas Instruments | Texas Instruments |
| Converter Resolution | 16 bit | 16 bit |
| Channel Configuration | 1 mono channel | 1 mono channel |
| ADC Architecture | Delta-sigma ADC | Delta-sigma ADC |
| DAC Architecture | Delta-sigma DAC | Delta-sigma DAC |
| Maximum Modem Operation Rate | 56 kbps | 56 kbps |
| Maximum Sampling Frequency | 26 kHz | 26 kHz |
| Dynamic Range | 88 dB typical at 8 kHz sampling and 1 kHz input frequency | 88 dB typical at 8 kHz sampling and 1 kHz input frequency |
| Input and Output Type | Differential input and differential output | Differential input and differential output |
关键差异点
- Voice-band-focused mono conversion （对比 PCM3501EG4)
- Differential analog signal architecture （对比 PCM3501EG4)
- Compact 24-pin integration （对比 PCM3501EG4)
设计说明
Treat the analog signal path as a sensitive differential route. Connect input and output pairs with matched geometry, minimize loop area, and keep switching-node and digital-clock traces away from the codec pins. Use a continuous ground reference beneath the analog section and follow the manufacturer application layout for supply and bypass-capacitor placement. This is particularly important because the stated 88 dB dynamic range is a typical analog performance figure and system layout can affect the realized noise floor.
Place the required bypass capacitors adjacent to the device's supply and ground pins, and route each capacitor directly into the relevant power or ground pin rather than through shared narrow traces. Confirm the permitted supply range, capacitor values, and stability requirements in the manufacturer datasheet before layout release. If the analog source has a separate supply domain, establish its permitted sequence and grounding method before connecting it to the codec.
Do not treat PCM3501E, PCM3501E/2K, and PCM3501EG4 as interchangeable ordering labels without reviewing the manufacturer ordering table. PCM3501E/2K denotes a 2,000-piece tape-and-reel ordering form, while PCM3501EG4 is a separate suffix identified as a complete replacement. Also do not assume PCM3500E is drop-in compatible: the comparison result alone does not establish matching pin assignments or electrical limits.
Confirm the codec's clock, frame, data, and control timing against the host interface implementation. Provide stable clocking, define the data word format in firmware, and avoid routing the serial bus across long unprotected board distances. If the codec and controller are separated by a cable or connector, add the appropriate line driver or isolation component rather than relying on the codec's short PCB-level digital interface.
合规信息
The verified product records do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for PCM3501E. AEC-Q100 is not applicable because this is a general-purpose audio codec rather than an automotive-qualified device in the stated product information.
