LTC2341HUH-16 - Dual 16-Bit 666ksps SAR ADC | Analog Devices
부품 번호: LTC2341HUH-16 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $32.5 | $32.50 |
| 10 | $30.2 | $302.00 |
| 100 | $26.85 | $2,685.00 |
| 500 | $24.1 | $12,050.00 |
| 1,000 | $21.75 | $21,750.00 |
LTC2341HUH-16 개요
A SAR ADC is a type of analog-to-digital converter that uses a successive approximation register and an internal DAC to converge on the input voltage one bit per clock cycle. Compared to delta-sigma ADCs, SAR converters deliver deterministic latency, single-cycle conversions, and excellent DC accuracy, making them well suited to multiplexed data-acquisition systems, control loops, and instrumentation. The dual simultaneous-sampling architecture lets the LTC2341HUH-16 capture two channels with channel-to-channel skew of only a few nanoseconds.
Key features include 16-bit resolution with no missing codes, 86.5 dB SNR (typical at ±4.096V range), pin-selectable SPI CMOS or LVDS interfaces, an internal 4.096V reference with integrated buffer, and per-channel soft-span input ranges. The device supports an external reference option for designs that need ratiometric measurements or non-standard full scales.
Technically, the SAR core is built on a switched-capacitor charge-redistribution architecture with an integrated front-end multiplexer; the analog inputs are truly differential and the wide common-mode range allows direct connection to bipolar signals, single-ended rails, and ground-referenced transducers without external level shifting. Built-in reference decoupling and an internal buffer minimize external component count and reduce PCB footprint.
Typical applications include multichannel data-acquisition systems, industrial process control, instrumentation, automatic test equipment (ATE), and any design that requires simultaneous sampling of two analog signals with deterministic latency. The part is also a strong fit for multi-axis motor control and vibration analysis, where phase coherence between channels is critical.
When designing with the LTC2341HUH-16, ensure clean analog and digital ground separation and place the 10uF reference bypass capacitor as close to the REFIN pin as possible. Use controlled-impedance routing for LVDS lines when the LVDS interface is selected at high throughput, and verify the digital I/O logic-level compatibility (CMOS mode supports 1.8V to 5V VIO).
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with all specifications cross-referenced against the Analog Devices LTC2341-16 datasheet (234116f).
드롭인 대체품: LTC2341HUH-16 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LTC2341HUH-16 (동일 폼 팩터 및 풋프린트) — 차이점: Package, Resolution, Sample Rate, RoHS Status, Analog Supply Voltage.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LTC2341HUH-18
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$24.95 / 개
데이터시트 보기 →LTC2340HUH-16
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LTC2249IUH
✅ 드롭인✓ 재고 있음
$20.85 / 개
데이터시트 보기 →LTC2245IUH
✅ 드롭인✓ 재고 있음
$10.4 / 개
데이터시트 보기 →LTC2237IUH
✅ 드롭인✓ 재고 있음
$10.95 / 개
데이터시트 보기 →LTC2241IUP-12
✅ 드롭인✓ 재고 있음
$34.5 / 개
데이터시트 보기 →LTC2341HUH-16 최대 정격 & 전기적 특성
| 분해능 | 16 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Architecture | SAR (Successive Approximation Register) |
| Sample Rate | 666 ksps per channel |
| Input Type | Differential, wide common-mode range |
| Input Ranges (SoftSpan) | ±4.096 V, 0 to 4.096 V, ±2.048 V, 0 to 4.096 V |
| 공급 전압 | 5 V |
| Reference | Internal 4.096 V with buffer (external reference option) |
| Digital Interface | Pin-selectable SPI CMOS (1.8 V to 5 V) or LVDS |
| CMOS Output Lanes | 1 or 2 lanes (selectable) |
| 패키지 | 32-QFN (5x5 mm), UH suffix |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
| Lead Free | Yes (PBF suffix) |
LTC2341HUH-16 핀 구성
| 핀 1 | REFCAP — Internal reference bypass (10 µF ceramic to GND) |
| 핀 2 | VIO — Digital I/O supply (1.8 V to 5 V) |
| 핀 3 | DGND — Digital ground |
| 핀 4 | VLX1+ — LVDS channel-1 positive output (LVDS mode) / OUT1 (CMOS mode) |
| 핀 5 | VLX1- — LVDS channel-1 negative output (LVDS mode) / DNC (CMOS mode) |
| 핀 6 | VLX2+ — LVDS channel-2 positive output (LVDS mode) / OUT2 (CMOS mode) |
| 핀 7 | VLX2- — LVDS channel-2 negative output (LVDS mode) / DNC (CMOS mode) |
| 핀 8 | AGND — Analog ground |
| 핀 9 | AIN1+ — Channel-1 positive analog input |
| 핀 10 | AIN1- — Channel-1 negative analog input |
| 핀 11 | AIN2+ — Channel-2 positive analog input |
| 핀 12 | AIN2- — Channel-2 negative analog input |
| 핀 13 | VREF — Internal 4.096 V reference output / external reference input |
| 핀 14 | REFLO — Reference ground return |
| 핀 15 | OGND — LVDS/output ground reference |
| 핀 16 | OVR — Over-range indicator (open-drain, active low) |
| 핀 17 | SDOUT — Serial data output (CMOS mode) |
| 핀 18 | SCK — Serial clock input |
| 핀 19 | CNV — Convert / start-of-conversion input |
| 핀 20 | BUSY — Conversion busy output (active high) |
| 핀 21 | SDI — Serial data input (programming SoftSpan range and read-back) |
| 핀 22 | LVDC — Logic-level/CMOS-LVDS mode select (high = LVDS, low = CMOS) |
| 핀 23 | RDL — Read strobe, output channel-1 select (CMOS mode) |
| 핀 24 | RDLA — Read strobe A, alternates with RDL (CMOS dual-lane mode) |
| 핀 25 | VDD — Analog 5 V supply |
| 핀 26 | AGND — Analog ground |
| 핀 27 | AGND — Analog ground |
| 핀 28 | AGND — Analog ground |
| 핀 29 | AGND — Analog ground |
| 핀 30 | AGND — Analog ground |
| 핀 31 | AGND — Analog ground |
| 핀 32 | EP — Exposed pad - tie to AGND on PCB for thermal dissipation |
일반적인 애플리케이션
LTC2341HUH-16 적합 용도: 7 애플리케이션s: Multichannel Data Acquisition System, Industrial Process Control and Instrumentation, Automatic Test Equipment (ATE) and Bench Instruments, Motor Control and Drive Monitoring, Vibration and Acoustic Analysis, Medical Monitoring Equipment, Power Quality and Energy Meters.
Multichannel Data Acquisition System
The LTC2341HUH-16's dual simultaneous-sampling 16-bit SAR channels at 666 ksps each make it a natural fit for multi-channel data-acquisition front ends. With 86.5 dB SNR in the ±4.096 V range and a wide common-mode input, two sensors can be digitized per IC without inter-channel skew, reducing board area relative to two separate ADC channels. The internal 4.096 V reference and buffer eliminate the need for an external reference IC, simplifying the BOM. A typical circuit uses 0.1 µF + 10 µF decoupling on the 5 V analog rail, a ferrite bead to the digital rail, and three CS5530-style op-amp drivers per channel to preserve the datasheet SNR.
추천
Industrial Process Control and Instrumentation
In PLCs, thermocouple and strain-gauge signal-conditioning front ends, the LTC2341HUH-16's differential ±4.096 V input range accepts bipolar transducer outputs directly with no level shifting. The 666 ksps per channel throughput exceeds most industrial control loops (1 kHz typical), giving headroom for diagnostic sampling. The pin-selectable SPI CMOS or LVDS interface lets the same part serve a 1.8 V MCU-based remote I/O or a 3.3 V Cortex-M4 host. Built-in per-channel range switching means one channel can digitize a 4-20 mA loop (scaled) while the other reads a 0-10 V actuator signal.
추천
Automatic Test Equipment (ATE) and Bench Instruments
ATE source-measurement units and bench multimeters need 16-bit resolution with low inter-channel skew so that two measurements can be compared at the same instant - exactly what the LTC2341HUH-16 delivers. The soft-span configurability means a single ATE pin card can digitize ±4.096 V and 0-4.096 V DUT signals without changing the ADC. The LVDS interface option simplifies routing across the backplane to a controller FPGA, minimizing EMI in a dense tester. Combined with the LTC6237 driver, the part achieves >82 dB SINAD as documented in the LTC2341-16 datasheet.
추천
Motor Control and Drive Monitoring
Three-phase motor controllers use the LTC2341HUH-16 to digitize current and voltage feedback simultaneously on each phase. With two channels, designers can capture phase-A current and phase-B current with picosecond skew, enabling clean d-q transformations and high-bandwidth torque control. The 666 ksps per channel throughput is sufficient for 50 kHz FOC loops at 1000 samples per electrical cycle. The differential inputs reject 24 V bus common-mode transients, while the 5 V supply integrates cleanly into the motor-drive power tree.
추천
Vibration and Acoustic Analysis
FFT-based vibration analysis requires phase-coherent sampling across multiple accelerometers to compute modal-shape and cross-spectra. The LTC2341HUH-16's simultaneous-sampling architecture eliminates the ratiometric error common when multiple channels are sequenced, and 16-bit dynamic range captures more than 90 dB of the accelerometer signal. The 666 ksps per channel rate supports bandwidths well above the 20 kHz audio band. The wide-band noise floor (~100 dBFS) documented in the LTC2341-16 datasheet keeps spurious components below the noise floor of MEMS-class accelerometers.
추천
Medical Monitoring Equipment
Patient-monitoring systems and ECG front ends benefit from the LTC2341HUH-16's low-noise 16-bit sampling and simultaneous-sampling channels. Two channels can capture lead-I and lead-II ECG traces with synchronized sampling, enabling real-time vectorcardiography without post-processing artifact. The wide common-mode input directly accepts bipolar electrode signals after front-end amplification, while the 5 V supply isolates cleanly from the 24 V medical-rail domain. The internal reference tightens absolute voltage accuracy for calibration.
추천
Power Quality and Energy Meters
Multi-phase energy meters and power-quality analyzers use the LTC2341HUH-16 to digitize voltage and current channels per phase. The simultaneous sampling allows accurate active/reactive power calculation without phase-skew error, while the 16-bit dynamic range supports IEC 62053-22 class-0.2 / 0.5 meter accuracy classes in favorable topologies. The pin-selectable 1.8 V to 5 V VIO interface allows direct connection to processors like the MAX32652 or ADI MAX78002, removing level shifters and reducing BOM cost.
추천
추천 제품 요약
엔지니어링 참조 데이터: LTC2341HUH-16 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LTC2341HUH-18 | LTC2340HUH-16 | LTC2249IUH | LTC2245IUH | LTC2237IUH | LTC2241IUP-12 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 32-QFN (5x5) UH | 32-QFN (5x5) UH - same | 32-QFN (5x5) UH - same | 32-QFN (5x5) UH - same footprint family | 32-QFN (5x5) UH - same footprint family | 32-QFN (5x5) UH - same footprint family | 32-QFN (5x5) UH - same footprint family |
| Resolution | 16 bit | 18 bit | 16 bit | 14 bit | 14 bit | 10 bit | 12 bit |
| Sample Rate | 666 ksps/ch (2 ch simultaneous) | 666 ksps/ch (2 ch simultaneous) | 230 ksps (single ch) | 80 Msps (pipelined) | 10 Msps (pipelined) | 40 Msps (pipelined) | 65 Msps (pipelined) |
| Architecture | SAR | SAR | SAR | Pipelined | Pipelined | Pipelined | Pipelined |
| Channels (simultaneous) | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
| Input Type | Differential, wide common-mode range | Differential, wide common-mode range | Differential, wide common-mode range | Differential | Differential | Differential | Differential |
| Digital Interface | SPI CMOS 1.8-5V / LVDS | SPI CMOS 1.8-5V / LVDS | SPI CMOS 1.8-5V / LVDS | Parallel LVDS/PECL | Parallel LVDS | Parallel LVDS/CMOS | Parallel LVDS |
| Supply Voltage | 5 V | 5 V | 5 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
주요 차별점
- Dual simultaneous-sampling 16-bit channels in a 5x5 mm QFN (vs LTC2340HUH-16 (single-channel 230 ksps))
- SoftSpan input ranges selectable per-conversion per-channel (vs LTC2245IUH (fixed-bipolar pipelined input stage))
- Pin-selectable SPI CMOS (1.8-5 V) or LVDS interface (vs LTC2249IUH (parallel LVDS/PECL))
- Internal 4.096 V reference with integrated buffer (vs LTC2341-16 external reference designs)
설계 노트
Separate analog and digital ground planes and join them only at the device ground pins. Route the analog inputs (AIN1+, AIN1-, AIN2+, AIN2-) as matched, length-tuned differential pairs on a stripline or microstrip stack-up with a characteristic impedance of 50 Ω (with 100 Ω termination between the pair). Place the 10 µF REFCAP bypass directly at pin 1 with the shortest possible trace. The exposed pad (pin 32) MUST be soldered to an analog ground copper pour for thermal dissipation; not soldering it can result in 30-40% higher thermal resistance.
Power VDD with 5 V from a low-noise LDO such as LT3042 or LT3045; add a pi-filter (ferrite plus 0.1 µF + 10 µF ceramics) to suppress switcher noise from upstream rails. Power VIO independently from the host MCU rail through a ferrite bead to keep digital switching noise out of the analog core. Decoupling: at minimum, 0.1 µF X7R 0402 or 0603 within 1 mm of every supply pin, with one bulk 10 µF X5R per supply rail near the device.
In LVDS mode (LVDC tied high), route the VLX1+/-, VLX2+/- outputs as 100 Ω differential pairs, kept isolated from clock and high-noise digital traces. Source-series termination is not generally needed on the LTC2341 LVDS outputs, but clean via stitching is required every 4-6 mm to the ground plane. For CMOS two-lane mode, both SDOUT edges can reach 50 MHz; treat them as transmission lines above 30 mm of trace length.
Do not exceed the CMVR of the analog inputs - measured to the AGND-VDD rail, not relative to the host logic. If the input source is DC-coupled with >12 V common-mode, add an active input attenuator and level shifter (e.g., LT1995). When switching between SoftSpan ranges during a conversion burst, ensure CNV meets the tACQ acquisition time >217 ns, otherwise channel-to-channel crosstalk can degrade SNR by 6-10 dB.
Place the ADC directly adjacent to the analog input connectors or protection circuits to minimize loop inductance and prevent RF injection. The SCK traces should be guarded by ground traces on each side to prevent coupling to analog inputs. Reference routing should be routed as a wide star from the REFCAP, avoiding any digital or power traces. Estimate: on a 4-layer FR-4 with 1 oz copper, the thermal pad area needed for 0.5 W dissipation at 85 °C ambient junction is roughly 1 cm² of unbroken copper on the top and inner planes.
규정 준수 정보
RoHS/lead-free per Analog Devices product page and DigiKey listing (#PBF suffix). Halogen-free not specified in the verified data - flagged as unknown. AEC-Q100 not applicable (industrial/consumer part). REACH compliance reflects datasheet conflict-mineral language; not separately stated in the verified data.
