PCM1750U - Dual 18-Bit Audio ADC | Texas Instruments | SOIC-28
MPN： PCM1750U ✓ 啟用中PCM1750U 概覽
An audio ADC is a data-converter IC that converts left- and right-channel analog audio signals into digital sample data for transmission, storage, processing, or playback. The PCM1750U belongs to the broader ADC/DAC category, with its application-specific role defined by audio signal acquisition. It is a dual CMOS device, allowing two analog audio inputs to be represented within one package rather than requiring two separate converter packages.
The principal verified characteristics are 18-bit resolution, a dual-channel architecture, successive-approximation conversion, and a serial output format. These features make the PCM1750U suitable for digital audio recording, stereo capture, multimedia equipment, and other systems that require two synchronized audio conversion channels. The distributor classification identifies the device as an audio ADC in a 28-pin SOIC package.
Successive-approximation conversion implements a binary-search sequence that progressively resolves the sampled input voltage. This architecture is appropriate for audio systems requiring deterministic serial data transfer and practical converter performance. Because no complete manufacturer datasheet was included in the verified dataset, the clock frequency, conversion rate, dynamic range, full-scale range, channel isolation, and analog input impedance are not independently stated here and must be confirmed in the manufacturer datasheet.
Typical implementation places the PCM1750U after stereo input conditioning, with anti-alias filtering or other analog front-end stages ahead of its analog inputs. The serial interface then connects to a digital audio processor, audio codec, microcontroller, or logic device capable of receiving the converter's data, clock, and control signals. PCB layout should keep analog and digital return paths separated, minimize digital clock coupling into the analog inputs, and provide stable bypassing near the device.
The principal design trade-off is that the PCM1750U integrates only the conversion function shown in the verified information; system-level audio performance also depends on the input amplifier, anti-alias filter, reference implementation, clock source, grounding, and software configuration. Before finalizing a design, verify timing, power-supply requirements, analog input range, and pin functions against the current Texas Instruments datasheet.
This page consolidates verified distributor information, source traceability, replacement guidance, and engineering-focused selection notes. It also distinguishes confirmed PCM1750U characteristics from parameters that still require datasheet verification, providing a practical basis for sourcing and early design assessment without inventing unavailable electrical details.
直接替換替代品，適用於 PCM1750U — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
PCM1750U/1K
✅ 直接替換📋 參考替代品（不在目錄中）
PCM1750U 最大額定值與電氣特性
| Converter Type | Dual CMOS 18-bit monolithic audio analog-to-digital converter |
| 解析度 | 18 bit |
| Architecture | Dual-channel |
| Conversion Method | Successive approximation |
| Output Interface | Serial |
| Device Type | Audio ADC |
| 封裝 | 28-SOIC |
| Terminal Count | 28 terminals |
| Package Code | SOP |
| Package Shape | Rectangular |
| Terminal Form | Gull wing |
| Temperature Grade | Commercial |
PCM1750U rectangular 腳位配置指南
PCM1750U（rectangular 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： PCM1750U.
請參閱 資料表 以查看完整腳位配置。
典型應用
PCM1750U 適用於 6 應用s: Stereo Audio Capture, Digital Audio Recording, Multimedia Audio Equipment, Communication and Voice Processing, Audio Test and Measurement, Industrial Audio Monitoring.
Stereo Audio Capture
The PCM1750U is a natural fit for a stereo capture front end because the verified manufacturer description identifies it as a dual-channel, 18-bit audio ADC. Two analog audio paths can feed the converter after independent preamplification and anti-alias filtering, allowing left- and right-channel information to be represented by one 28-SOIC device. The 18-bit resolution provides 262,144 possible codes per sample, while the dual architecture reduces the converter count and associated board area. The exact simultaneous sampling mode, conversion rate, input range, and channel-to-channel alignment must be confirmed in the complete Texas Instruments datasheet before synchronization and timing are finalized.
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Digital Audio Recording
PCM1750U can serve as the analog-to-digital conversion stage in a digital recording system where two audio channels must become serial digital data. Its confirmed 18-bit resolution and successive-approximation architecture are relevant to preserving fine amplitude detail before storage or further processing. The serial interface reduces the number of parallel data conductors compared with a parallel converter, although the exact supported format, clock rate, and synchronization behavior remain unavailable in the supplied excerpts. Designers should confirm those timing details, the analog full-scale range, and digital interface voltage levels in the manufacturer datasheet.
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Multimedia Audio Equipment
The dual 18-bit PCM1750U is applicable in multimedia equipment that accepts stereo analog audio but processes it digitally. A practical signal chain would place microphone or line-level conditioning ahead of the converter, followed by serial transfer to a digital signal processor, codec, or suitable microcontroller. Its verified 28-SOIC package supports compact surface-mount construction, while the dual-channel organization avoids using two separate ADC packages. Because the supplied data does not state dynamic range, total harmonic distortion, input impedance, or operating limits, system headroom and anti-alias filter design must remain provisional until those parameters are confirmed.
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Communication and Voice Processing
PCM1750U can be evaluated for communication equipment requiring dual analog audio acquisition before digital filtering, echo cancellation, or codec processing. Its confirmed successive-approximation conversion method, 18-bit code width, and serial output are useful for embedded audio pipelines, while the 28-SOIC package supports higher-density boards than a large through-hole converter. Voice bandwidth, signal-to-noise ratio, and full-scale input voltage are not stated in the verified records, so the device should not be selected for a communication standard until the current manufacturer datasheet demonstrates compliance with the required channel bandwidth and performance limits.
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Audio Test and Measurement
The PCM1750U may be useful in an audio measurement system that needs to acquire two analog channels for comparison, analysis, or calibration. Eighteen-bit resolution provides substantially more code levels than an 8-bit converter, and the serial interface can feed a laboratory processor or embedded controller. A sound measurement design still depends on a low-noise reference, stable clock, appropriate input attenuation, and an anti-alias filter. Since the verified dataset does not state SNR, ENOB, gain error, channel isolation, or sampling frequency, the PCM1750U should remain a candidate rather than a guaranteed metrology-grade solution until those specifications are verified.
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Industrial Audio Monitoring
PCM1750U/1K is the more relevant candidate for industrial audio monitoring when the industrial temperature-grade designation reported by the distributor must be respected. The PCM1750U itself is identified as commercial grade, so it may be appropriate only where the application stays within the verified commercial-grade limits. The verified cross-reference material identifies PCM1750U/1K as an 18-bit, dual-channel, serial ADC in the same 28-SOIC format. Industrial use still requires complete electrical verification, including supply voltage, power consumption, temperature limits, EMC design practices, and input conditioning.
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推薦產品摘要
工程參考資料，適用於 PCM1750U — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PCM1750U/1K |
|---|---|---|
| Package | 28-SOIC | 28-SOIC |
| Brand | Texas Instruments | Texas Instruments |
| Resolution | 18 bit | 18 bit |
| Architecture | Dual-channel | Dual CMOS monolithic audio ADC |
| Conversion Method | Successive approximation | Successive approximation |
| Interface | Serial | Serial |
| Temperature Grade | Commercial | Industrial |
| Device Category | Audio ADC | Audio ADC |
主要差異化特點
- Commercial-grade source configuration (對比PCM1750U/1K)
- Integrated dual-channel conversion (對比PCM1750U/1K)
- Serial interface implementation (對比PCM1750U/1K)
設計說明
Separate analog input traces from digital clock and data paths, and use a continuous ground reference where the manufacturer's recommended layout permits it. The verified PCM1750U data establishes a dual-channel, 18-bit, serial audio ADC in a 28-SOIC package but does not supply a recommended PCB pattern or complete pin table. Before routing, obtain the current datasheet and its application schematic so power, ground, analog inputs, clock, data, and control pins are assigned from the authoritative diagram.
Treat the serial data and clock signals as potentially high-speed edges even though their maximum rate is not stated in the supplied excerpts. Route them over a continuous reference plane, keep them away from analog input traces, minimize stub branches, and observe the interface voltage and timing limits in the manufacturer datasheet. If the audio input is sensitive, place the anti-alias filter close to the converter and avoid routing analog signals beneath digital clock nets.
Do not assume that PCM1750U, PCM1750U/1K, PCM1750UG4, and PCM1750U/1KG4 are automatically interchangeable solely because distributor snippets show a 28-SOIC package. PCM1750U and PCM1750U/1K differ in documented temperature grade, while the other names may represent ordering or grade suffixes. Verify the exact pin functions, temperature range, supply requirements, and lifecycle status against the applicable manufacturer datasheet before treating any configuration as a drop-in replacement.
合規資訊
The supplied verified records do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-mineral compliance. AEC-Q100 is not applicable because PCM1750U is an audio converter rather than an automotive-qualified device in the supplied data.