PCM1803DB - 24-Bit 96-kHz Stereo ADC | Texas Instruments
料号： PCM1803DB ✓ 量产中PCM1803DB 概述
An audio ADC is an integrated circuit that converts left- and right-channel analog audio voltages into digital data for processing, storage, transmission, or playback. PCM1803DB belongs to the ADC/DAC class of data-conversion ICs and uses a delta-sigma modulator followed by a digital decimation filter. An integrated high-pass filter removes the DC component of the input signal, while master and slave mode support allows the converter to operate within different system clocking arrangements.
The principal features are 24-bit resolution, a maximum sampling rate of 96 kHz, stereo single-ended input, and selectable 64-times or 128-times oversampling. Its serial interface supports audio-system integration, and the single-ended input architecture is useful when the source has a relatively simple single-ended output stage. The converter is fabricated using a CMOS process and is offered in a compact 20-pin SSOP package suited to cost-sensitive consumer audio equipment.
PCM1803DB is positioned between basic codec functions and more complex audio-conversion solutions. The delta-sigma architecture moves much of the signal-shaping and filtering work into the digital domain, while the decimation and high-pass filters reduce unwanted DC content and aliasing components before the final digital data is presented. System designers still need to provide correct analog and digital supplies, suitable input conditioning, a supported serial clock configuration, and decoupling close to the device pins.
Typical uses include consumer stereo audio equipment, digital recording systems, multimedia appliances, and compact audio interfaces requiring two single-ended analog channels. Its 96-kHz conversion rate supports high-resolution digital-audio workflows, while the 5 V analog and 3.3 V digital supply arrangement can simplify mixed analog and digital system design. Its 24-bit output resolution also provides more numerical headroom than lower-resolution converters when downstream gain staging is carefully controlled.
For a robust implementation, treat the analog input network as a precision signal path and verify the clock, format, and master or slave configuration against the manufacturer datasheet. Place bypass capacitors close to the supply pins, keep digital return currents away from sensitive analog input routing, and confirm that the external interface device supports the converter's serial output protocol and timing.
This page consolidates the PCM1803DB's key conversion specifications, sourcing information, application guidance, and same-family drop-in considerations. It also highlights practical checks involving supply domains, clocking, filtering, PCB layout, and input conditioning that engineers should complete before releasing a new audio design.
直接替换替代料： PCM1803DB ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PCM1803DB （相同外形与封装尺寸） ——差异在于 Converter Type, Maximum Sampling Rate, Package, Process Technology.
PCM1803ADBRG4
✅ 直接替换📋 参考替代料（不在目录中）
PCM1802DB
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →PCM1804DB
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →PCM1801DB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PCM1800DB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PCM1803DB 最大额定值与电气特性
| Converter Type | Stereo delta-sigma analog-to-digital converter |
| 分辨率 | 24 bit |
| Maximum Sampling Rate | 96 kSPS |
| Input Architecture | Single-ended voltage input |
| Number of Audio Channels | 2 channels |
| Analog Input Range | 3 Vp-p |
| Oversampling Rates | 64-times and 128-times |
| Digital Decimation Filter | Integrated |
| DC Removal Filter | Integrated high-pass filter |
| Operating Modes | Master and slave |
| Analog Supply | 5 V |
| Digital Supply | 3.3 V |
| Process Technology | CMOS |
| 封装 | 20-pin SSOP |
| 安装类型 | Surface mount |
PCM1803DB 20-pin ssop 引脚配置指南
PCM1803DB（20-pin ssop 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： PCM1803DB.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PCM1803DB 适用于 6 应用s: Consumer Stereo Audio Equipment, Digital Audio Recording System, Multimedia Appliance Audio Input, USB Audio Interface, Portable Media Player, Industrial Audio Measurement Module.
Consumer Stereo Audio Equipment
The PCM1803DB fits consumer stereo equipment that converts two single-ended audio inputs into 24-bit digital data at rates up to 96 kSPS. Its integrated decimation filter and high-pass filter reduce the amount of external signal conditioning required for basic two-channel recording paths. The 5 V analog and 3.3 V digital supply arrangement separates sensitive analog circuitry from digital processing, while the 20-pin SSOP package keeps the design compact. The principal design trade-off is that single-ended inputs provide less flexibility than differential converters, so source impedance, grounding, and input range must be controlled carefully.
推荐
Digital Audio Recording System
The PCM1803DB is suitable for a compact two-channel digital recording system requiring 24-bit conversion and a maximum sampling rate of 96 kSPS. Its delta-sigma modulator performs initial quantization, while the integrated decimation filter shapes the oversampled signal before it reaches the digital interface. The converter's 64-times and 128-times oversampling options allow the system designer to balance filtering and operating considerations. A design should reserve pins for external clocking, ensure the host controller supports the selected serial format, and route analog and digital return currents separately.
推荐
Multimedia Appliance Audio Input
PCM1803DB can provide the stereo conversion stage in a multimedia appliance that accepts analog line-level inputs and passes digital audio to a processor. Its 24-bit resolution supports high-resolution processing, while the 96-kHz sampling capability is adequate for many consumer playback, recording, and communication functions. The 3 Vp-p single-ended input range requires a front end that attenuates or scales source signals without overload. For best results, keep the converter's analog bypass network compact, return digital current away from the input network, and configure the serial clock according to the host controller requirements.
推荐
USB Audio Interface
The PCM1803DB can serve as the analog-to-digital front end of a two-channel USB audio interface. The converter produces 24-bit stereo samples up to 96 kSPS, while an embedded controller or USB audio interface handles packetization and host communication. Master or slave operation provides flexibility when coordinating system clocks, but the design must implement the required timing and framing correctly. The analog section should use a stable low-noise reference, and the digital section should include appropriate termination or level translation where dictated by the companion controller.
推荐
Portable Media Player
PCM1803DB is applicable to portable media equipment that captures stereo audio while operating from a 5 V analog rail and a 3.3 V digital rail. The 20-pin SSOP package supports space-constrained layouts, and the integrated high-pass filter helps remove unwanted DC from audio inputs. Portable designs must still account for analog headroom, source impedance, startup behavior, and clock compatibility with the portable host processor. If analog input signals vary widely in level, include controlled gain or attenuation ahead of the converter to keep them within the 3 Vp-p input range.
推荐
Industrial Audio Measurement Module
PCM1803DB can be used in a compact industrial audio measurement module requiring stereo digital samples at 24-bit resolution and rates up to 96 kSPS. Its integrated decimation and DC-removal functions simplify the signal chain, while selectable oversampling provides configuration flexibility. Measurement accuracy still depends on the analog source impedance, reference quality, grounding, and the calibration method; the converter alone does not establish the accuracy of the complete instrument. Use stable supplies, controlled input attenuation, and a defined clock source to make repeatable digital data acquisition possible.
推荐
工程参考数据： PCM1803DB ——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 | PCM1803ADBRG4 | PCM1802DB | PCM1804DB | PCM1801DB |
|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
关键差异点
- Single-chip stereo conversion with integrated filtering （对比 PCM1802DB)
- Broad choice of oversampling modes （对比 PCM1804DB)
- Automotive-qualified family alternative available （对比 PCM1803DB)
设计说明
Separate the analog input path from digital clock and serial-data routing. Place the device bypass capacitors next to their corresponding supply pins, connect the analog and digital ground paths according to the manufacturer layout guidance, and keep high-current return currents out of the region beneath the analog inputs. This prevents digital switching activity from modulating the single-ended input voltage and is especially important when the 3 Vp-p input range leaves limited headroom.
Use the documented 5 V analog and 3.3 V digital supplies with local high-frequency bypass and adequate bulk-energy storage. Bring both supply connections to the device through short paths and verify startup, power sequencing, and voltage tolerances against the manufacturer datasheet. Do not assume that a common ground point alone eliminates supply coupling; the analog and digital return currents must be routed so the converter's reference node remains quiet during digital switching.
Design the analog front end around the 3 Vp-p single-ended input range and the source impedance allowed by the PCM1803DB. Include attenuation or gain as needed, use stable resistor networks, and avoid clipping before the converter input. Confirm that the selected oversampling rate, clock source, serial format, and master or slave setting match the host controller. A logic-compatible clock is not sufficient if data framing or timing differs.
Do not substitute an ADC solely because it uses a 20-pin SSOP package. Verify every pin assignment, supply level, clock ratio, serial interface, startup state, and reset requirement against the candidate's manufacturer documentation. For PCM1803ADBRG4, specifically review the TI logic-pin guidance because input states and external pull components can affect replacement behavior. Document any substitution with a board-level review before production release.
合规信息
Compliance attributes were not identified in the product information excerpts. The PCM1803ADBRG4 candidate is identified as an automotive-qualified PCM1803A-family option, but no separate AEC-Q100 qualification statement for PCM1803DB was established.
