ADS802U - 12-Bit 10-MSPS ADC | Texas Instruments
MPN： ADS802U ✗ 停產ADS802U 概覽
An ADC is a data converter that samples an analog voltage and converts it into a digital code for processing, measurement, or control. The ADS802U belongs to the ADC, data-converter, and signal-processing semiconductor hierarchy. Its parallel interface exposes multiple data bits at once, making it suitable for systems where data must be captured rapidly without requiring a serial-link redesign.
The principal verified features are 12-bit resolution, 10 MSPS sampling, a 65 MHz wideband track-and-hold input, single-ended or differential input configuration, internal reference, no missing codes, and a stated typical power consumption of 250 mW. A single +5 V analog supply and separate digital-supply arrangement provide flexibility in mixed analog and digital systems.
The converter uses a pipelined architecture to balance throughput and multibit conversion. According to the Texas Instruments ADS802 product information, the device includes a 12-bit quantizer, wideband track-and-hold circuit, reference, and three-state outputs. These blocks capture an input during acquisition and present parallel digital results for downstream logic.
Typical uses include industrial instrumentation, communications receivers, digital oscilloscope and waveform-analysis systems, process-control equipment, and laboratory measurement systems. The 10 MSPS throughput is appropriate for capturing rapidly changing waveforms when 12-bit resolution is more important than very high channel count.
Designers should provide compliant analog and digital supply bypassing, route high-speed parallel outputs carefully, and account for acquisition time and settling requirements at the chosen sampling rate. Because only verified source values are reproduced here, unresolved electrical limits, timing values, and compliance declarations are explicitly identified in the validation fields.
直接替換替代品，適用於 ADS802U — 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： ADS802U （相同外形與佔位） — 差異在於 Package, Process Technology.
ADS802G
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS802U 最大額定值與電氣特性
| ADC Type | Pipelined analog-to-digital converter |
| 解析度 | 12 bit |
| 取樣率 | 10 MSPS |
| Number of Input Channels | 1 |
| Input Configuration | Single-ended or differential |
| Track-and-Hold Bandwidth | 65 MHz |
| Analog Supply | +5 V |
| Typical Power Consumption | 250 mW |
| Reference | Internal |
| Digital Output | Three-state parallel output |
| Process Technology | Small-geometry CMOS |
| Missing Codes | No missing codes |
| 封裝 | 28-pin SOIC |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
ADS802U 28-pin soic 腳位配置指南
ADS802U（28-pin soic 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： ADS802U.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS802U 適用於 6 應用s: Digital Oscilloscope Front End, Communications Receiver and IF Sampling, Industrial Process Measurement, Portable Test and Measurement, Digital Oscilloscope and Lab Analyzer, Embedded Waveform Capture.
Digital Oscilloscope Front End
The ADS802U fits a digital oscilloscope acquisition path because it combines 12-bit resolution with a 10 MSPS sampling rate and a 65 MHz track-and-hold bandwidth. Its parallel outputs can feed a capture register or memory without serial-link overhead. Use it where compact instrumentation and trace density are priorities, while verifying input range, acquisition settling, and bandwidth requirements. The converter's 250 mW typical power also makes thermal design relevant in multichannel instruments.
推薦
Communications Receiver and IF Sampling
ADS802U can serve as a communications sampling stage when a design requires 12-bit resolution, a 10 MSPS conversion rate, and flexible single-ended or differential input configuration. Differential use is particularly useful when the receiver front end can reject common-mode noise. The three-state parallel output supports direct capture by digital logic. Engineers should verify converter dynamics and signal bandwidth against the modulation scheme rather than assuming 10 MSPS alone guarantees correct RF-system performance.
推薦
Industrial Process Measurement
The ADS802U is appropriate for compact industrial data-acquisition modules that need to digitize rapidly varying analog process signals at up to 10 MSPS. Its internal reference reduces external reference-component count, while single-ended or differential input selection supports different sensor front ends. Differential wiring is valuable when rejecting ground offsets and coupled noise. Final design work must confirm the analog input range, permissible common-mode voltage, isolation strategy, and calibration requirements.
推薦
Portable Test and Measurement
ADS802U can support portable measurement equipment where a 12-bit converter, 10 MSPS throughput, and a 28-pin SOIC package offer a practical balance between measurement resolution, speed, and PCB complexity. The parallel interface reduces controller I/O pressure during rapid sample transfer. Designers should assess 250 mW typical power consumption against the enclosure thermal budget and should include local bypass and controlled reference grounding to preserve measurement repeatability.
推薦
Digital Oscilloscope and Lab Analyzer
ADS802U suits laboratory analyzers that prioritize sample density and vertical resolution over minimum conversion latency. A 10 MSPS rate produces 100 ns sample spacing, and the 65 MHz track-and-hold bandwidth allows acquisition of substantially faster analog transitions when the external path is appropriately designed. Parallel outputs accelerate transfer to capture memory. Engineers should evaluate settling behavior, input bandwidth, output noise, and timing margins using the complete manufacturer datasheet.
推薦
Embedded Waveform Capture
ADS802U can feed an embedded waveform-capture subsystem in industrial controllers, test fixtures, or condition-monitoring equipment. Its 12-bit parallel data can be sampled by programmable logic, while the internal reference simplifies deterministic converter setup. The 28-pin SOIC package remains easy to route on a through-hole-compatible mixed-signal PCB. Before implementation, confirm data timing, clock jitter sensitivity, acquisition mode, and whether a higher-rate serial ADC would provide a better system trade.
推薦
推薦產品摘要
工程參考資料，適用於 ADS802U — 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 | ADS802G |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 28-pin SOIC | 28-pin SOIC |
| Resolution | 12 bit | 12 bit |
| Sampling Rate | 10 MSPS | 10 MSPS |
| Input Channels | 1 | 1 |
| Input Configuration | Single-ended or differential | Single-ended or differential |
| Track-and-Hold Bandwidth | 65 MHz | 65 MHz |
| Analog Supply | +5 V | +5 V |
| Typical Power Consumption | 250 mW | 250 mW |
| Reference | Internal | Internal |
| Digital Output | Three-state parallel output | Three-state parallel output |
主要差異化特點
- High sample density in a compact parallel-interface converter (對比ADS802G)
- Wideband acquisition for higher-frequency waveforms (對比ADS802G)
- Flexible analog-input architecture (對比ADS802G)
設計說明
Route the +5 V analog supply directly to the converter's supply pins through short, low-impedance traces, and place the capacitors recommended by the official datasheet at the pins. Keep analog and digital return currents separate until they join at the device ground reference. Because the verified typical converter power is 250 mW, estimate local supply demand and copper heating under the actual sampling and logic load before fixing the regulator and thermal margins.
Treat the 65 MHz track-and-hold bandwidth as a reason to control source impedance and edge rates, not as permission to use arbitrary slow op-amp outputs. Place input filtering and any gain stage close to the ADC, use a compact return path, and avoid routing the analog input beside the 12-bit parallel bus. Validate settling and full-scale bandwidth with the actual source, reference, and loading arrangement rather than relying on converter resolution alone.
Route the three-state parallel outputs as a short, length-matched bus to the capture logic and ground their outputs while the converter is disabled, where the interface design requires that state. Avoid adding test pads or long stubs that create clock-edge sensitivity. Check output timing against the receiver setup and hold requirements from the complete datasheet, and maintain a continuous ground plane while isolating noisy switching supplies from the analog reference node.
合規資訊
The supplied verified snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.