TDA8763M/4/C4 - 10-bit 40MSPS Sigma-Delta ADC | NXP
MPN： TDA8763M/4/C4 ✗ 停產TDA8763M/4/C4 概覽
What is a sigma-delta ADC? A sigma-delta (ΣΔ) ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution from a relatively coarse quantizer. Unlike successive-approximation (SAR) or flash ADCs that resolve a sample in one conversion step, the sigma-delta ADC trades speed for resolution, averaging many low-bit samples to produce a high-accuracy output. Within the broader converter hierarchy, it sits as a sub-type of Nyquist-rate ADCs, while it excels in applications where bandwidth is moderate and signal-to-noise ratio (SNR) must be high.
Key features of the TDA8763M/4/C4 include a 10-bit resolution, 40 MSPS sampling rate, single analog input channel, internal reference regulator that eliminates an external reference IC, and low-power operation suitable for portable instrumentation. The integrated regulator stabilizes the internal reference voltage against supply variations, improving DC accuracy across temperature. The parallel output bus simplifies digital interface design by removing the need for serialization or external clock-data recovery.
Architecturally, the device combines a sigma-delta modulator with a decimating digital filter and a parallel output register. The internal reference regulator provides a low-drift, low-noise reference voltage, while the input stage accepts single-ended or differential analog signals. The 28-pin SSOP package offers a compact footprint suitable for space-constrained applications.
Typical applications include industrial process control, medical instrumentation, CCD imaging digitizers, video signal processing, and portable test equipment. The combination of 10-bit resolution and 40 MSPS sampling makes the device well-suited to digitizing IF-stage signals, ultrasound return paths, and intermediate-frequency communication channels.
When designing with this device, ensure adequate decoupling on both AVDD and DVDD rails, follow the recommended input common-mode voltage range, and observe the timing requirements on the parallel output bus. The internal reference regulator eliminates the need for an external reference but still requires proper bypass capacitance near the REF pin.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not consolidated in the manufacturer datasheet, enabling faster part selection for engineers.
直接替換替代品，適用於 TDA8763M/4/C4 — 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。
此系列的變體
與下列產品可直接替換的同系列型號： TDA8763M/4/C4 （相同外形與佔位） — 差異在於 Architecture, Input Type, Number of Channels, Package, Sampling Rate.
TDA8763M/4/C4,112
✅ 直接替換📋 參考替代品（不在目錄中）
TDA8763M/4/C4,118
✅ 直接替換📋 參考替代品（不在目錄中）
TDA8763AM/3/C4
✅ 直接替換聯絡詢價
查看資料表 →TDA8763M/4/C4 最大額定值與電氣特性
| 解析度 | 10 bit |
| 取樣率 | 40 MSPS |
| Number of Channels | 1 |
| Architecture | Sigma-Delta |
| Input Type | Single-ended |
| Output Interface | Parallel |
| 封裝 | 28-pin SSOP |
| 安裝類型 | Surface Mount |
| Reference Type | Internal reference regulator |
| Power Consumption | Low-power (per datasheet title) |
| Terminal Form | GULL WING |
| Terminal Count | 28 |
| Package Code | SSOP |
| Package Shape | RECTANGULAR |
| Temperature Grade | INDUSTRIAL |
TDA8763M/4/C4 rectangular 腳位配置指南
TDA8763M/4/C4（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： TDA8763M/4/C4.
請參閱 資料表 以查看完整腳位配置。
典型應用
TDA8763M/4/C4 適用於 6 應用s: Industrial Process Control Data Acquisition, Medical Instrumentation Signal Chain, CCD Imaging Digitizers, Intermediate Frequency (IF) Digitization, Portable Test and Measurement Equipment, Video Signal Processing Front-Ends.
Industrial Process Control Data Acquisition
The TDA8763M/4/C4 suits industrial process-control digitizers that require 10-bit resolution at moderate bandwidths. Its 40 MSPS sigma-delta architecture oversamples the transducer signal, allowing an external simple anti-aliasing filter while the integrated decimator produces a clean in-band digital word. The internal reference regulator stabilizes DC accuracy against supply drift on factory-floor rails. Place the ADC after instrumentation amplifiers and add 100 nF + 10 uF decoupling on AVDD and DVDD. Trade-off: sigma-delta latency is higher than SAR, so it is best for continuous monitoring rather than closed-loop control loops.
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Medical Instrumentation Signal Chain
In medical instrumentation front-ends such as ultrasound receivers and patient-monitoring digitizers, the TDA8763M/4/C4's 10-bit resolution and 40 MSPS oversampling deliver sufficient dynamic range for demodulated biosignals. The sigma-delta modulator's noise-shaping pushes quantization noise out of the signal band, improving SNR where small analog amplitudes matter. The integrated reference regulator reduces BOM count, valuable for cost-sensitive single-use medical devices. Designers should still characterize leakage and PSRR across the medical EMC environment, and add ferrite beads on supply lines. Compared with SAR ADCs, this part favors bandwidth over absolute conversion latency.
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CCD Imaging Digitizers
The TDA8763M/4/C4 can digitize CCD video output streams in imaging subsystems where 10-bit intensity resolution at moderate pixel rates is acceptable. Its parallel 10-bit output bus simplifies connection to a frame-grabber FPGA or ASIC, and the 40 MSPS sampling rate supports standard VGA-class video bandwidths. The internal reference regulator eases thermal drift concerns in long-exposure applications. Place the ADC close to the CCD analog output to minimize trace capacitance, and use ground guarding on the parallel digital output side. Modern CMOS image sensors typically integrate ADCs, so this use case applies to legacy CCD modules.
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Intermediate Frequency (IF) Digitization
Communications IF stages benefit from the TDA8763M/4/C4's combination of 40 MSPS sampling and sigma-delta noise shaping. Oversampling the IF signal by a wide margin allows digital downconversion and filtering in software or FPGA fabric, eliminating multiple analog mixer stages. The 10-bit resolution is sufficient for demodulating narrow-band signals with moderate SNR requirements, including AM/FM audio recovery and digital-modulation pre-processing. Ensure the analog input common-mode voltage is within the device's specified range and that the clock jitter remains below the sigma-delta modulator's tolerance for in-band SNR.
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Portable Test and Measurement Equipment
Handheld oscilloscopes, spectrum analyzers, and field-test instruments leverage the TDA8763M/4/C4's low-power 10-bit conversion and integrated reference for compact, battery-friendly designs. The 28-SSOP package fits small PCBs, while the parallel output allows direct capture by an FPGA or microcontroller DMA channel. The internal reference regulator removes one external component, helping extend battery life and reducing warm-up drift. Trade-off: 10 bits limits dynamic range versus 12/14-bit modern alternatives, so engineers targeting higher SNR should evaluate current-generation SAR ADCs for new portable designs.
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Video Signal Processing Front-Ends
The TDA8763M/4/C4 fits legacy video front-ends that require 10-bit pixel or component-video digitization at up to 40 MSPS. The parallel output bus reduces glue logic between the ADC and a video processor or frame buffer. The sigma-delta architecture provides inherent anti-aliasing through oversampling, simplifying the analog input filter. Designers should still add line-driver buffering ahead of the ADC input and maintain controlled-impedance routing for the parallel output to limit crosstalk. Modern HDMI/DVI digitizers typically use dedicated video ADCs, but this part remains relevant for industrial and broadcast video output.
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推薦產品摘要
工程參考資料，適用於 TDA8763M/4/C4 — 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 | TDA8763M/4/C4,112 | TDA8763M/4/C4,118 | TDA8763AM/3/C4 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Architecture | Sigma-Delta | Sigma-Delta | Sigma-Delta | Sigma-Delta (same family) |
| Number of Channels | 1 | 1 | 1 | 1 (same family) |
| Output Interface | Parallel | Parallel | Parallel | Parallel (same family) |
| Reference Type | Internal regulator | Internal regulator | Internal regulator | Internal regulator (same family) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete (family) |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial (family) |
主要差異化特點
- Integrated internal reference regulator eliminates external reference IC (對比TDA8763AM/3/C4)
- Higher 40 MSPS sampling rate versus typical 10-bit SAR ADCs at 20 MSPS (對比ADS8319 (TI))
- Parallel 10-bit output simplifies digital interface (對比AD9201 (ADI))
設計說明
The TDA8763M/4/C4 requires separate analog (AVDD) and digital (DVDD) supply rails. Place a 10 uF bulk capacitor and a 100 nF ceramic decoupling capacitor as close as possible to each supply pin. Use a ferrite bead or small inductor between AVDD and DVDD to isolate digital switching noise from the analog reference. Power-rail sequencing is recommended so that AVDD rises before DVDD to avoid latch-up at startup.
Route the parallel 10-bit digital output bus with matched trace lengths and a continuous ground plane underneath. Add series damping resistors (22-33 ohm) near the ADC output pins to limit edge rates and reduce crosstalk into the analog input. Keep the analog input trace short and guarded with ground pours on both sides to minimize coupling from the parallel digital bus.
Do not exceed the analog input common-mode voltage range or apply signals before power-up. Ensure the sample clock source has low jitter (<50 ps RMS) to preserve in-band SNR of the sigma-delta modulator. The internal reference regulator still requires a low-ESR bypass capacitor at the REF pin - omitting it degrades DC accuracy and increases low-frequency noise.
合規資訊
Compliance status not present in the Verified Web Data. The part was released in 1999 (IC02 datasheet revision) before modern RoHS/REACH certifications were standard; consult NXP for current compliance statements.