LTC2372HUH-16 - 16-Bit 500ksps 8-Ch SAR ADC | Analog Devices
부품 번호: LTC2372HUH-16 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.95 | $169.50 |
| 100 | $15.2 | $1,520.00 |
| 500 | $13.65 | $6,825.00 |
| 1,000 | $12.4 | $12,400.00 |
| 3,000 | $11.05 | $33,150.00 |
LTC2372HUH-16 개요
An ADC (Analog-to-Digital Converter) is a data-acquisition component that converts real-world analog signals into digital codes for processing by microcontrollers, DSPs, or FPGAs. A SAR (Successive Approximation Register) ADC is a specific architecture that uses a binary-search algorithm and an internal DAC to converge on the input voltage in N clock cycles for N-bit resolution. Within the broader hierarchy, SAR ADCs sit alongside pipelined, sigma-delta, and flash converters in the precision data-converter category, balancing speed, accuracy, and power.
Key features include a highly configurable, low-crosstalk 8-channel input multiplexer supporting fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges. The high-speed SPI-compatible serial interface supports 1.8V, 2.5V, 3.3V, and 5V logic, and an on-chip sequencer with a depth of 16 allows autonomous channel scanning. The internal reference removes the need for an external precision reference and the associated board area.
The architecture combines a charge-redistribution capacitive DAC with a precision comparator and internal clock, achieving excellent INL and DNL while maintaining low power. The 5V single-supply operation and wide logic-level compatibility simplify interface to modern MCUs without level shifters, and the exposed thermal pad on the QFN-32 package supports ground referencing and thermal dissipation.
Typical applications include industrial process control and instrumentation, multichannel data acquisition systems, programmable logic controllers, medical instrumentation, and automated test equipment. The 8-channel MUX and sequencer make it particularly attractive for multi-sensor front ends.
When designing with this device, allocate adequate settling time between multiplexer channel switches, place the 0.1 µF and 10 µF decoupling capacitors close to the supply pins, and route the analog and digital grounds as star-connected islands meeting at the exposed pad. The internal reference is sufficient for most applications but can be overdriven by an external reference when ultra-low drift is required.
This page synthesizes distributor pricing, drop-in alternatives, application circuits, and PCB layout guidance not consolidated in the manufacturer datasheet, giving engineers a single reference for selection and sourcing.
드롭인 대체품: LTC2372HUH-16 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LTC2372HUH-16 (동일 폼 팩터 및 풋프린트) — 차이점: Package, Input Type, Resolution, RoHS Status, Supply Voltage.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LTC2372CUH-16
✅ 드롭인✓ 재고 있음
$15.75 / 개
데이터시트 보기 →LTC2373HUH-16
✅ 드롭인✓ 재고 있음
$7.92 / 개
데이터시트 보기 →LTC2374HUH-16
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2372HUH-16#TRPBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LTC2348HLX-18
✅ 드롭인✓ 재고 있음
$58.1 / 개
데이터시트 보기 →LTC2344CUH-18
✅ 드롭인✓ 재고 있음
$18.2 / 개
데이터시트 보기 →LTC2372HUH-16 최대 정격 & 전기적 특성
| 분해능 | 16 bits |
| Sample Rate | 500 ksps |
| Conversion Time | 1.5 us |
| Number of Input Channels | 8 |
| Input Type | Differential / Pseudo-Differential Unipolar / Pseudo-Differential Bipolar |
| ADC Architecture | SAR (Successive Approximation Register) |
| SNR | 96 dB |
| 공급 전압 | 5 V (single supply) |
| Internal Reference | 2.048 V, 20 ppm/°C max drift |
| Reference Buffer | Single-shot capable, internal |
| Digital Interface | SPI-compatible, 1.8V / 2.5V / 3.3V / 5V logic |
| Sequencer Depth | 16 |
| 동작 온도 | -40C to +125C |
| 패키지 | 32-QFN (5x5 mm) with exposed pad |
| RoHS 상태 | Compliant (Pb-free #PBF suffix) |
| Channel Crosstalk | Low crosstalk (per datasheet) |
LTC2372HUH-16 핀 구성
| 핀 1 | GND — Ground reference |
| 핀 2 | VDD — 5V analog supply |
| 핀 3 | REF — 2.048V reference output / external reference input |
| 핀 4 | REFBUF — Reference buffer output |
| 핀 5 | IN0+ — Analog input 0 positive |
| 핀 6 | IN0- — Analog input 0 negative / COM |
| 핀 7 | IN1+ — Analog input 1 positive |
| 핀 8 | IN1- — Analog input 1 negative / COM |
| 핀 9 | IN2+ — Analog input 2 positive |
| 핀 10 | IN2- — Analog input 2 negative / COM |
| 핀 11 | IN3+ — Analog input 3 positive |
| 핀 12 | IN3- — Analog input 3 negative / COM |
| 핀 13 | IN4+ — Analog input 4 positive |
| 핀 14 | IN4- — Analog input 4 negative / COM |
| 핀 15 | IN5+ — Analog input 5 positive |
| 핀 16 | IN5- — Analog input 5 negative / COM |
| 핀 17 | IN6+ — Analog input 6 positive |
| 핀 18 | IN6- — Analog input 6 negative / COM |
| 핀 19 | IN7+ — Analog input 7 positive |
| 핀 20 | IN7- — Analog input 7 negative / COM |
| 핀 21 | GND — Ground |
| 핀 22 | OVDD — Digital I/O supply (1.8V-5V) |
| 핀 23 | SCK — SPI serial clock input |
| 핀 24 | SDO — SPI serial data output |
| 핀 25 | SDI — SPI serial data input |
| 핀 26 | CNV — Convert / chip select input |
| 핀 27 | BUSY — Conversion busy indicator output |
| 핀 28 | GND — Ground |
| 핀 29 | GND — Ground |
| 핀 30 | GND — Ground |
| 핀 31 | GND — Ground |
| 핀 32 | EP — Exposed pad - thermal and electrical ground (must be soldered) |
일반적인 애플리케이션
LTC2372HUH-16 적합 용도: 6 애플리케이션s: Industrial Process Control and PLCs, Multichannel Data Acquisition Systems, Medical Instrumentation Front End, Automated Test Equipment (ATE), Power and Energy Monitoring Systems, Sensor Array and IoT Edge Digitisation.
Industrial Process Control and PLCs
The LTC2372HUH-16 is a strong fit for industrial PLC analog input modules where eight channels of 16-bit precision are required on a single ADC. Its 500 ksps aggregate throughput allows full scanning of all eight channels at >60 ksps per channel, easily handling thermocouple, RTD, and 4-20 mA bridge conditioning stages. The 96 dB SNR and onboard 20 ppm/°C reference remove the need for an external reference and simplify the analog front end, while the SPI interface supports 3.3V and 5V logic common to industrial MCUs. The -40C to +125C operating range and 32-QFN footprint suit DIN-rail and panel-mount module form factors.
추천
Multichannel Data Acquisition Systems
For benchtop and modular data-acquisition systems, the LTC2372HUH-16's 8-channel MUX and 16-deep sequencer reduce host firmware overhead by autonomously cycling through configured channels. At 500 ksps aggregate, four channels at 100 ksps each deliver wide dynamic range for vibration, strain-gauge, and sensor-array digitisation. The 96 dB SNR preserves measurement floor for small-signal analysis, and the internal 2.048V reference eliminates drift concerns over moderate temperature spans. A typical design pairs the ADC with an op-amp driver such as the LT6200 and an FPGA or MCU host over SPI.
추천
Medical Instrumentation Front End
Patient-monitoring and diagnostic-instrument designs benefit from the LTC2372HUH-16's low noise (96 dB SNR) and multichannel capability for ECG, SpO2, temperature, and pressure signal chains. The SAR architecture provides deterministic latency critical for paced-signal capture and synchronised sampling across leads. The onboard reference simplifies the safety-isolation barrier by reducing the number of analog rails that must cross isolation. SPI communication at 1.8V-5V levels interfaces directly to low-power MCUs common in battery-powered medical devices, while the 32-QFN (5x5) footprint enables compact handheld enclosures.
추천
Automated Test Equipment (ATE)
In ATE pin cards and bench instruments, the LTC2372HUH-16 provides 16-bit, 500 ksps capture across eight test points per ADC, maximising channel density per square inch of PCB. The fast 1.5 µs conversion time and sequencer minimise test-loop overhead, while the configurable input ranges (fully differential, pseudo-differential unipolar/bipolar) match a wide variety of DUT signal levels without external signal conditioning. The exposed-pad QFN-32 package provides excellent thermal and electrical grounding for the high-speed SPI bus, critical for low-noise measurement floors in production testers.
추천
Power and Energy Monitoring Systems
Three-phase power monitors and energy-meter designs use the LTC2372HUH-16 to digitise voltage and current channels simultaneously with 16-bit resolution. The 500 ksps throughput supports harmonic analysis up to the 50th harmonic of a 50/60 Hz fundamental, while the 96 dB SNR enables accurate low-distortion power calculations. The onboard reference and 5V single-supply operation simplify isolated and non-isolated metering architectures. Pairing the ADC with a shunt-current sensor and resistor-divider voltage network yields a compact, calibrated metering module suitable for revenue-grade or sub-metering applications.
추천
Sensor Array and IoT Edge Digitisation
Industrial IoT edge nodes use the LTC2372HUH-16 to consolidate eight sensor channels onto a single 5V ADC, reducing BOM cost and PCB area compared to per-channel ADCs. The sequencer autonomously scans temperature, pressure, flow, and level sensors, posting results to a low-power MCU over SPI. The 1.8V-5V logic compatibility allows direct connection to common wireless SoCs without level shifters, and the -40C to +125C range supports outdoor and factory-floor deployments. The internal reference removes a calibration step in volume production, lowering test cost per node.
추천
추천 제품 요약
엔지니어링 참조 데이터: LTC2372HUH-16 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LTC2372CUH-16 | LTC2373HUH-16 | LTC2374HUH-16 | LTC2372HUH-16#TRPBF | LTC2348HLX-18 | LTC2344CUH-18 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 32-QFN (5x5) | 32-QFN (5x5) - same | 32-QFN (5x5) - same | 32-QFN (5x5) - same | 32-QFN (5x5) - same | QFN family - similar | QFN family - similar |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 18 bits | 18 bits |
| Sample Rate | 500 ksps | 500 ksps | 1 Msps | 2 Msps | 500 ksps | 200 ksps (simultaneous) | 400 ksps (simultaneous) |
| Input Channels | 8 (MUX) | 8 (MUX) | 8 (MUX) | 8 (MUX) | 8 (MUX) | 8 simultaneous | 4 simultaneous |
| Internal Reference | 2.048V, 20 ppm/C | 2.048V, 20 ppm/C | 2.048V, 20 ppm/C | 2.048V, 20 ppm/C | 2.048V, 20 ppm/C | External only | External only |
| Operating Temperature | -40C to +125C | 0C to +70C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | 0C to +70C |
| Digital Interface Logic Levels | 1.8V / 2.5V / 3.3V / 5V | 1.8V / 2.5V / 3.3V / 5V | 1.8V / 2.5V / 3.3V / 5V | 1.8V / 2.5V / 3.3V / 5V | 1.8V / 2.5V / 3.3V / 5V | LVDS / CMOS | CMOS |
주요 차별점
- 8-channel input multiplexer with 16-deep sequencer reduces host MCU overhead (vs LTC2365ITS8 (single-channel SAR ADC))
- Onboard 2.048V, 20 ppm/C reference eliminates external precision reference (vs LTC2348HLX-18 (external reference required))
- Wide logic-level SPI interface supports 1.8V to 5V hosts without level shifters (vs ADS8860 (single logic level))
- 500 ksps throughput with 96 dB SNR balances speed and dynamic range (vs LTC2374HUH-16 (2 Msps, 93 dB SNR))
- Single 5V supply operation simplifies power architecture (vs ADS1110A6IDBVR (2.7V-5.5V but 16-bit sigma-delta))
설계 노트
Place a 0.1 µF ceramic decoupling capacitor as close as possible to each VDD pin (pins 2 and similar), and add a 10 µF bulk capacitor near the supply entry point. The OVDD pin (pin 22) requires its own 0.1 µF decoupling cap. Power-supply rejection is excellent but switching regulator ripple above 100 kHz should be filtered with a ferrite bead or RC network if the input analog signals are below 1 mV full-scale. According to the LTC2372-16 datasheet typical application circuit, the supply should rise monotonically and settle within 1 ms of power-on for proper reference startup.
Route analog and digital ground as separate islands that connect only at the exposed pad (EP, pin 32) of the QFN-32 package. This star-ground topology prevents digital return currents from corrupting the analog reference and input signal paths. Place the reference bypass capacitor (typically 10 µF ceramic + 0.1 µF ceramic in parallel) within 2 mm of the REF and REFBUF pins. The SPI signals (SCK, SDO, SDI, CNV, BUSY) should be routed on the opposite side of the package from the analog inputs, with ground guarding on both sides for signals exceeding 50 MHz edge rates.
Maintain matched trace lengths for the differential input pairs (INx+ and INx-) to within 0.5 mm to preserve common-mode rejection at high frequencies. For multi-channel scanning, the LTC2372-16 datasheet specifies a settling time that depends on the source impedance of the input driver - use a low-impedance op-amp buffer (such as the LT6200 or LTC6241) directly at the ADC inputs when scanning between channels to avoid cross-channel contamination. Keep analog input traces short and guarded to minimise crosstalk.
Do not leave the CNV pin floating - tie it to OVDD through a pull-up or drive it actively from the host MCU, as floating CNV can cause spurious conversions. The internal reference requires the REFBUF capacitor to be present for low-noise operation; omitting it degrades SNR by 5-10 dB. When using the pseudo-differential bipolar input range, ensure the COM pin voltage is within the supply rails - exceeding this range causes input clamping and ADC code saturation rather than graceful overdrive behaviour.
The SCK signal should be kept below 50 MHz to maintain timing margin on the SPI interface, and the BUSY signal should be monitored rather than polled with fixed delays to achieve the rated 500 ksps throughput. SDO trace length should be < 50 mm to avoid ringing; if longer, add a 33 Ω series damping resistor near the LTC2372HUH-16 SDO pin. The Analog Devices datasheet timing diagrams show tCONV of 1.5 µs minimum - designs violating this degrade INL.
규정 준수 정보
Pb-free per #PBF suffix on distributor listings; full material declaration available from Analog Devices. Not AEC-Q100 qualified - choose automotive-grade parts for vehicle applications.
