AD7621ACPZRL - 16-Bit 3 MSPS PulSAR ADC | Analog Devices
MPN： AD7621ACPZRL ✓ 啟用中AD7621ACPZRL 概覽
An SAR ADC is a successive-approximation-register analog-to-digital converter that uses a binary-search algorithm and a charge-redistribution DAC to digitize a sampled analog input one bit per conversion clock. SAR ADCs sit at the next level of the converter hierarchy below delta-sigma and pipelined ADCs and are valued for their deterministic latency, single-shot accuracy, and lack of pipeline delay, which makes them well suited to multiplexed channel scanning, control loops, and event-driven sampling. The PulSAR family is Analog Devices' registered name for its precision, charge-redistribution SAR converter line.
Key differentiating features include three selectable throughput modes (3 MSPS in wideband warp and warp modes, 2 MSPS in normal mode, and 1.25 MSPS in impulse mode), a 2.048 V internal reference, both serial and parallel (16- or 8-bit bus) digital interfaces, and a flexible input span driven by an external differential driver or AD8021/AD8138 driver. The warp mode and wideband warp mode further accelerate throughput by allowing faster acquisition at the cost of a tightened aperture window.
Architecturally, the device pairs a high-bandwidth differential input track-and-hold with a precision charge-redistribution capacitive DAC and an on-chip conversion clock, which simplifies board-level timing. The single 2.5 V supply simplifies power-tree design, and the exposed-pad LFCSP-VQ package provides a low-thermal-resistance path to the PCB copper for heat spreading during continuous 3 MSPS operation.
Typical application areas include medical imaging front-ends, industrial process control and data acquisition, instrumentation and automatic test equipment (ATE), and high-speed multichannel multiplexed systems. The 3 MSPS throughput and ±2 LSB INL are well aligned to imaging signal chains and to per-channel scanning modules behind a multiplexer.
When designing in this ADC, allocate adequate ground and reference decoupling close to the pins, and lay out the analog input traces as a true differential pair terminated at the driver outputs. Use a low-jitter, low-phase-noise sampling clock to preserve aperture accuracy, and follow the AD7621 evaluation board layout for the LFCSP-VQ exposed pad to keep junction temperature within the rated -40 °C to +85 °C operating range.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 AD7621ACPZRL — 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： AD7621ACPZRL （相同外形與佔位） — 差異在於 Data Interface, Package, Supply Voltage.
AD7621ACPZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD7621BCPZRL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7606BSTZ
✅ 直接替換 ⚠️ 規格未經驗證✗ 缺貨
$16.9 / 單位
查看資料表 →AD7621BSTZRL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7622BCPZRL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7621ACPZRL 最大額定值與電氣特性
| Number of Bits | 16 |
| Architecture | SAR (charge redistribution, PulSAR) |
| Throughput (Wideband Warp / Warp) | 3 MSPS |
| Throughput (Normal Mode) | 2 MSPS |
| Throughput (Impulse Mode) | 1.25 MSPS |
| Number of Input Channels | 1 (fully differential) |
| Differential Input Range | ±VREF (VREF up to 2.5 V) |
| Internal Reference | 2.048 V |
| INL (Max / Typical) | ±2 LSB / ±1 LSB |
| SINAD at 100 kHz | 89 dB typical |
| THD at 100 kHz | -101 dB typical |
| Missing Codes | None (16-bit guaranteed) |
| Data Interface | Serial, Parallel (16- or 8-bit bus) |
| Pipeline Delay | None (SAR architecture) |
| 供應電壓 | 2.5 V (single supply) |
| 封裝 | 48-LFCSP-VQ (7 mm x 7 mm) with exposed pad |
| 工作溫度 | -40 °C to +85 °C |
| RoHS 狀態 | Compliant |
AD7621ACPZRL 48-lfcsp-vq (7 mm x 7 mm) with exposed pad 腳位配置指南
AD7621ACPZRL（48-lfcsp-vq (7 mm x 7 mm) with exposed pad 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： AD7621ACPZRL.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD7621ACPZRL 適用於 6 應用s: Medical Imaging and Instrumentation Front-Ends, Industrial Process Control and Data Acquisition, Automatic Test Equipment (ATE) and Instrumentation, High-Speed Multiplexed Signal Acquisition, Vibration and Acoustic Monitoring Systems, Power Quality and Energy Metering.
Medical Imaging and Instrumentation Front-Ends
The AD7621ACPZRL fits medical imaging front-ends where 16-bit resolution, ±2 LSB INL (typical ±1 LSB), and 89 dB SINAD ensure accurate digitization of low-level sensor signals. Its 3 MSPS warp-mode throughput captures fast transient events without the sinc-shaped latency of delta-sigma ADCs, making it well suited for per-channel data acquisition modules behind a multiplexer. Place the device adjacent to the analog front-end (e.g., AD8021 driver), and follow the datasheet's exposed-pad layout to keep junction temperature within -40 °C to +85 °C.
推薦
Industrial Process Control and Data Acquisition
For industrial process control and multichannel data-acquisition (DAQ) systems, the AD7621ACPZRL's lack of pipeline delay (SAR architecture) gives deterministic per-sample latency, so each conversion result directly maps to a known acquisition instant. The 48-LFCSP-VQ exposed-pad package spreads heat during continuous 3 MSPS operation, supporting long-duration scanning behind an external multiplexer. Use the 2.048 V internal reference with the recommended decoupling network, and pair with a low-jitter clock source to preserve aperture accuracy.
推薦
Automatic Test Equipment (ATE) and Instrumentation
The AD7621ACPZRL is well matched to automatic test equipment (ATE) and precision instrumentation, where 16-bit no-missing-codes performance and -101 dB THD at 100 kHz preserve signal fidelity on the digitizer side. Its parallel (16-/8-bit) and serial interface options simplify integration with FPGAs or microcontrollers in tester pin-electronics. Route the analog inputs as a tight differential pair, keep the sampling clock low-jitter, and tie the exposed pad to a solid ground plane for thermal and reference stability.
推薦
High-Speed Multiplexed Signal Acquisition
In multichannel scanning systems, the AD7621ACPZRL's warp mode reaches 3 MSPS so a host controller can step through channels at high effective aggregate rates without suffering pipeline-related settling artifacts. The single 2.5 V supply simplifies the local power tree, and the internal 2.048 V reference removes an external reference chip when the wide VREF tolerance is acceptable. Choose external multiplexers with low charge injection and validate channel-to-channel crosstalk in the final layout.
推薦
Vibration and Acoustic Monitoring Systems
The AD7621ACPZRL's 89 dB SINAD and -101 dB THD at 100 kHz make it a strong candidate for vibration and acoustic monitoring front-ends where 16-bit dynamic range and low distortion are essential. The SAR architecture delivers each conversion in a single clock cycle, supporting event-triggered sampling from MEMS accelerometers or acoustic transducers. Follow the manufacturer's reference layout for the LFCSP-VQ-48 land pattern and place 0.1 µF + 10 µF decoupling at each supply pin.
推薦
Power Quality and Energy Metering
For power-quality analyzers and energy-metering front-ends, the AD7621ACPZRL's 3 MSPS warp-mode throughput captures fast transients on current and voltage channels, while ±2 LSB INL (typical ±1 LSB) preserves measurement accuracy across the dynamic range. Its single 2.5 V supply and serial interface reduce component count in compact metering modules. Decouple the supply with bulk and ceramic capacitors near the LFCSP-VQ exposed pad, and average multiple conversions when extended dynamic range is required.
推薦
推薦產品摘要
工程參考資料，適用於 AD7621ACPZRL — 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 | AD7621ACPZ | AD7621BCPZRL | AD7606BSTZ | AD7621BSTZRL | AD7622BCPZRL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 48-LFCSP-VQ (7x7) | 48-LFCSP-VQ (7x7) - same | 48-LFCSP-VQ (7x7) - same | 48-LFCSP-VQ (7x7) - same | 48-LFCSP-VQ (7x7) - same | 48-LFCSP-VQ (7x7) - same |
| Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Maximum Throughput | 3 MSPS (warp mode) | 3 MSPS | 3 MSPS | 200 kSPS per channel (8-ch simultaneous) | 3 MSPS | 2 MSPS |
| Architecture | SAR (PulSAR) | SAR (PulSAR) | SAR (PulSAR) | SAR (PulSAR) | SAR (PulSAR) | SAR (PulSAR) |
| INL (Max) | ±2 LSB | ±2 LSB | ±1.5 LSB | ±1 LSB (typical) | ±1 LSB | ±1 LSB |
| Input Channels | 1 differential | 1 differential | 1 differential | 8 differential (simultaneous sampling) | 1 differential | 1 differential |
| Supply Voltage | 2.5 V single | 2.5 V single | 2.5 V single | 5 V (single supply) | 2.5 V single | 2.5 V single |
| Internal Reference | 2.048 V | 2.048 V | 2.048 V | 2.5 V | 2.048 V | 2.048 V |
主要差異化特點
- Highest single-channel throughput in the PulSAR 16-bit family at this pin count (對比AD7622BCPZRL)
- Single 2.5 V supply eliminates the negative rail (對比AD7606BSTZ)
- No pipeline delay - deterministic per-sample latency (對比Pipelined ADCs)
設計說明
Solder the exposed thermal pad of the 48-LFCSP-VQ package to a continuous PCB ground plane using an array of thermal vias to spread heat. Place 0.1 µF ceramic and 10 µF bulk decoupling capacitors as close as practical to each VDD and REF pin to keep reference noise and supply ripple out of the analog input path. Estimated: for a 4-layer FR-4 board with 1 oz copper and a 4x4 via array under the pad, expected theta-JA is in the 25-30 °C/W range, well below the no-heatsink limit for 2.5 V single-supply operation.
Route the analog IN+ and IN- traces as a tightly coupled, length-matched differential pair from the driver to the ADC pins, and keep the pair away from switching nodes and digital output buses. Per Analog Devices' reference layout guidance, isolate the analog, digital, and ground regions with a single-point or split-ground strategy tied together only at the exposed pad. For the sampling clock, keep the trace short and use a low-jitter clock source; estimated: 50 ps rms clock jitter limits achievable SNR to roughly 88 dB at 100 kHz input.
Do not assume the AD7621ACPZRL and the LQFP-packaged AD7621ASTZRL are interchangeable - they share 48 pins but the LFCSP-VQ-7x7 land pattern differs from the LQFP-7x7 footprint, requiring PCB redesign. Avoid driving the inputs single-ended with the internal reference engaged; use a differential driver such as AD8021 or AD8138 to realize the full ±VREF input range and rated SINAD. Estimated: with a 100 Ω source imbalance between IN+ and IN-, expected SINAD degrades by several dB at 100 kHz.
合規資訊
RoHS and REACH compliance per Analog Devices product page and DigiKey listing (2026-10-12). Not AEC-Q100 qualified - this part is intended for industrial, instrumentation, and medical imaging designs rather than automotive front-ends. Lead-free (Pb-free) finish confirmed; halogen-free status not explicitly stated in the verified web data and is therefore marked unknown.
