LTC2372CUH-16 - 16-Bit 500ksps 8-Ch SAR ADC | Analog Devices
MPN： LTC2372CUH-16 ✓ 啟用中LTC2372CUH-16 概覽
A SAR ADC is a successive-approximation-register analog-to-digital converter: a type of Nyquist-rate data converter that performs one conversion per sample clock by binary-searching an internal capacitive DAC against the input voltage. SAR ADCs sit in the broader hierarchy of ADC → data converter → mixed-signal IC → semiconductor device, combining precision analog sampling with synchronous digital logic on a single die. Compared with delta-sigma converters, SAR ADCs offer deterministic latency, no pipeline delay, and excellent multi-channel multiplexing behavior, which is exactly why the LTC2372CUH-16 was architected around an 8-to-1 input MUX.
Key features include a fully differential ±VREF input stage (pseudo-differential unipolar and pseudo-differential bipolar inputs are also configurable), an integrated 2.048 V temperature-compensated reference with 20 ppm/°C maximum drift, a single-shot capable reference buffer, and 96 dB SNR. The high-speed SPI-compatible serial interface supports 1.8 V, 2.5 V, 3.3 V and 5 V host logic, and includes a sequencer with 16 steps that can cycle through any subset of the 8 input channels without host intervention.
The combination of 500 ksps throughput, 16-bit resolution, 8-channel MUX, and integrated reference makes the LTC2372CUH-16 a strong fit for multiplexed industrial data acquisition, multi-sensor monitoring, and instrumentation front-ends where several analog signals must be digitized by a single converter. The integrated reference eliminates the need for an external 2.048 V reference IC in space-constrained designs.
A typical design consideration is that the part's INL and SNR are specified with the on-chip reference buffer enabled; bypassing it degrades AC performance, so the reference buffer pin should be driven according to the datasheet's reference circuit. For best 16-bit noise performance, the analog inputs should be driven by a low-impedance, low-noise op-amp front end.
This page synthesizes distributor stock and pricing, drop-in package-compatible alternatives, and practical interface/PCB design notes not found in the manufacturer datasheet alone, organized for engineers evaluating the LTC2372CUH-16 for production designs.
直接替換替代品，適用於 LTC2372CUH-16 — 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： LTC2372CUH-16 （相同外形與佔位） — 差異在於 Number of Input Channels, Package, Reference Buffer, Resolution, RoHS Status.
LTC2372IUH-16
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2373CUH-16
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2373IUH-16
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2374CUH-16
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2374IUH-16
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2372CUH-16 最大額定值與電氣特性
| 解析度 | 16 bit |
| Number of Input Channels | 8 (single-ended/differential, with MUX) |
| Converter Architecture | SAR (Successive Approximation Register) |
| Maximum Sample Rate | 500 ksps |
| 供應電壓 | 5 V (single supply) |
| Input Configuration | Fully-differential, pseudo-differential unipolar, pseudo-differential bipolar (software configurable) |
| Signal-to-Noise Ratio (SNR) | 96 dB |
| On-Chip Reference Voltage | 2.048 V |
| Reference Drift | 20 ppm/°C max |
| Reference Buffer | Internal, single-shot capable |
| Digital I/O Logic Levels | 1.8 V / 2.5 V / 3.3 V / 5 V compatible |
| Serial Interface | SPI-compatible (high speed) |
| Channel Sequencer Depth | 16 steps |
| 封裝 | 32-QFN (5 mm × 5 mm) |
| Package Code (per datasheet) | HVQCCN / 32-lead QFN (UH suffix) |
| 工作溫度範圍 | 0 °C to +70 °C (commercial, 'C' grade) |
| RoHS 狀態 | Compliant (#PBF suffix) |
| Lead-Free | Yes (#PBF suffix) |
LTC2372CUH-16 hvqccn / 32-lead qfn (uh suffix) 腳位配置指南
LTC2372CUH-16（hvqccn / 32-lead qfn (uh suffix) 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： LTC2372CUH-16.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC2372CUH-16 適用於 6 應用s: Multiplexed Industrial Data Acquisition, Multi-Sensor Monitoring & IoT Edge Nodes, Test & Measurement Instrumentation, Medical Patient Monitoring Front-ends, Power & Energy Monitoring Systems, Audio Bandwidth Signal Capture.
Multiplexed Industrial Data Acquisition
The LTC2372CUH-16 is purpose-built for multiplexed 8-channel data acquisition in industrial systems, where one converter handles multiple analog sensors. Its 500 ksps throughput, 16-bit resolution and 96 dB SNR give 8 channels of high-accuracy digitization from a single 5 V supply. The on-chip 8-to-1 MUX and 16-step sequencer let the host CPU offload channel scanning, while the SPI-compatible interface supports 1.8 V to 5 V logic for direct connection to microcontrollers, FPGAs and industrial processors common in PLC backplanes.
推薦
Multi-Sensor Monitoring & IoT Edge Nodes
The LTC2372CUH-16's integrated 8-channel MUX and 2.048 V on-chip reference make it ideal for IoT edge nodes that digitize temperature, pressure, strain and flow sensor arrays. At 500 ksps with 16-bit resolution, the part digitizes up to 8 sensors with 96 dB SNR from a single 5 V rail, and the SPI-compatible interface connects directly to low-voltage IoT MCUs without level shifters. The integrated reference eliminates a dedicated reference IC on the BOM, reducing board space for compact edge modules.
推薦
Test & Measurement Instrumentation
Bench-top and ATE test instruments benefit from the LTC2372CUH-16's 500 ksps throughput and 16-bit resolution with 96 dB SNR. The 8-channel MUX lets a single ADC digitize multiple test points - including differential signals from DUTs - while the integrated 2.048 V reference with 20 ppm/°C drift provides the low-drift baseline ATE accuracy demands. The SPI interface runs at logic voltages from 1.8 V to 5 V, so the ADC pairs easily with modern FPGAs and bench DSPs.
推薦
Medical Patient Monitoring Front-ends
Multi-parameter patient monitors (ECG, SpO2, temperature, respiration) require simultaneous or sequential digitization of multiple analog channels with high SNR. The LTC2372CUH-16 provides 16-bit / 500 ksps performance with 96 dB SNR, an integrated reference and an 8-to-1 MUX - fitting multi-channel vital-sign front-ends from a single 5 V supply. The 16-step sequencer offloads channel scanning from the host MCU, freeing CPU cycles for DSP and alarm logic.
推薦
Power & Energy Monitoring Systems
Power-quality meters, multi-phase energy monitors and battery management front-ends digitize current-sense, temperature and voltage channels sequentially with high accuracy. The LTC2372CUH-16's 8-channel MUX, 16-bit resolution and integrated 2.048 V reference suit multi-channel current/voltage sensing where 500 ksps aggregate throughput is more than sufficient. The single 5 V supply and integrated reference reduce BOM cost in space-constrained smart-meter designs.
推薦
Audio Bandwidth Signal Capture
While SAR ADCs do not match dedicated audio converters, the LTC2372CUH-16's 96 dB SNR and 500 ksps sample rate cover audio-bandwidth multi-channel capture up to ~200 kHz per channel. Studio-grade multi-track recorders, vibration/acoustic monitoring and phased-array microphone front-ends can use the 8-channel MUX and 16-bit resolution to digitize multiple audio streams from a single 5 V supply, leveraging the sequencer for deterministic frame timing.
推薦
推薦產品摘要
工程參考資料，適用於 LTC2372CUH-16 — 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 | LTC2372IUH-16 | LTC2373CUH-16 | LTC2373IUH-16 | LTC2374CUH-16 | LTC2374IUH-16 |
|---|---|---|---|---|---|---|
| Package | 32-QFN (UH), 5x5 mm | 32-QFN (UH), 5x5 mm - same | 32-QFN (UH), 5x5 mm - same | 32-QFN (UH), 5x5 mm - same | 32-QFN (UH), 5x5 mm - same | 32-QFN (UH), 5x5 mm - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 18 bit | 18 bit |
| Max Sample Rate | 500 ksps | 500 ksps | 1 Msps | 1 Msps | 1.6 Msps | 1.6 Msps |
| Number of Input Channels | 8 (with MUX) | 8 (with MUX) | 8 (with MUX) | 8 (with MUX) | 8 (with MUX) | 8 (with MUX) |
| SNR | 96 dB | 96 dB | 96 dB | 96 dB | 98 dB (typ) | 98 dB (typ) |
| Supply Voltage | 5 V single | 5 V single | 5 V single | 5 V single | 5 V single | 5 V single |
| On-Chip Reference | 2.048 V, 20 ppm/°C | 2.048 V, 20 ppm/°C | 2.048 V, 20 ppm/°C | 2.048 V, 20 ppm/°C | 2.048 V, 20 ppm/°C | 2.048 V, 20 ppm/°C |
| Temperature Grade | Commercial (0 °C to +70 °C) | Industrial (-40 °C to +85 °C) | Commercial (0 °C to +70 °C) | Industrial (-40 °C to +85 °C) | Commercial (0 °C to +70 °C) | Industrial (-40 °C to +85 °C) |
主要差異化特點
- On-board 2.048 V reference with 20 ppm/°C max drift (對比LTC2373CUH-16)
- Lowest-speed, lowest-cost pin-compatible member of the LTC2372/73/74 family (對比LTC2374CUH-16)
- 8-channel low-crosstalk MUX with 16-step hardware sequencer (對比External 8-to-1 MUX + discrete ADC)
設計說明
The 32-QFN (UH) package has an exposed thermal pad on the bottom that must be soldered to a continuous PCB ground plane to meet AC performance specifications. Place the analog input RC anti-aliasing components as close to the ADC input pins as possible (typically within 3 mm), and route analog and digital ground planes separately under the analog and digital sides of the chip, joining them only at the exposed pad. Keep digital SPI traces away from the analog inputs to avoid digital-switching noise coupling into the ADC sampling capacitors.
The LTC2372CUH-16 operates from a single 5 V analog supply plus a separate digital I/O supply rail that can be 1.8 V, 2.5 V, 3.3 V or 5 V. Bypass the analog AVDD pin with a 10 µF ceramic + 0.1 µF ceramic pair placed within 3 mm of the pin; the digital OVDD pin needs its own 0.1 µF bypass. For best 96 dB SNR, the 5 V analog rail must be low-noise: a linear regulator (e.g., LT3042 or LT1761) feeding AVDD is preferred over a switching regulator directly.
Do not bypass the internal reference buffer: the INL and SNR specifications assume the on-chip reference buffer is enabled. Driving the REFBUF pin incorrectly (e.g., tying it low to disable the buffer) degrades AC performance substantially. Also, the input common-mode range depends on the input mode (fully-differential vs pseudo-differential unipolar/bipolar) - verify the analog input signal stays within the mode-specific common-mode window around VREF/2 to avoid linearity degradation near full-scale.
Drive the analog inputs with a low-impedance, low-noise op-amp front-end (e.g., ADA4945-1 or ADA4807) capable of settling to 16-bit accuracy within the acquisition time (tACQ). Add a 20-50 Ω series resistor at each analog input pin to dampen the kick-back from the ADC's sampling capacitor and isolate the front-end op-amp from capacitive switching transients. Estimate: for the LTC2372CUH-16's tACQ ≈ 250 ns at 500 ksps, a 1 nF sampling capacitor and a 50 Ω series resistor form a ~100 ns RC network that is well within the acquisition window.
合規資訊
RoHS compliance indicated by #PBF ordering suffix per DigiKey listing 5297595. The 'C' suffix in LTC2372CUH-16 denotes commercial temperature grade (0 °C to +70 °C); for industrial temperature grade (-40 °C to +85 °C) choose the LTC2372IUH-16. No automotive (AEC-Q100) qualified variant - this part targets industrial/consumer/test-and-measurement applications.
