LTC2351HUH-14#TRPBF - 14-Bit, 1.5Msps, 6-Ch Simultaneous-Sampling ADC | Analog Devices
N.º da peça: LTC2351HUH-14#TRPBF ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.05 | $9,05 |
| 10 | $8.15 | $81,50 |
| 100 | $7.2 | $720,00 |
| 500 | $6.4 | $3.200,00 |
| 1.000 | $5.85 | $5.850,00 |
LTC2351HUH-14#TRPBF Visão geral
A simultaneous-sampling SAR ADC is a converter that captures multiple analog channels on a common sampling edge, eliminating the inter-channel time skew inherent to multiplexed ADCs. Within the power-management IC family, the LTC2351 belongs to the data-converter hierarchy: ADC -> successive-approximation ADC -> simultaneous-sampling SAR ADC -> integrated multi-channel data acquisition IC. This category is foundational for any application that requires precise temporal correlation between multiple analog signals.
Key specifications include a 1.5 Msps aggregate throughput, 5.5 mA typical supply current, 12 uW sleep-mode shutdown current, and six true-differential input channels. The device supports a single 3 V analog supply and includes an internal 2.5 V reference (with optional external reference drive), along with a serial LVCMOS-compatible interface that simplifies the digital connection to FPGAs, DSPs, or microcontrollers.
Architecturally, each of the six input channels has its own dedicated track-and-hold amplifier that samples on the same CONVST edge, then sequentially converts through the shared 14-bit SAR core. This topology preserves full-scale input range while keeping the die small and power consumption low compared with six discrete ADCs. The integrated 2.5 V reference can be overdriven with an external reference for applications requiring tighter absolute accuracy or higher stability.
Typical applications include three-phase power metering and motor-control feedback, multi-axis industrial motion control, portable and battery-powered instrumentation, and simultaneous multi-channel data acquisition boards. The combination of low 5.5 mA supply current and 12 uW sleep mode makes the LTC2351 especially attractive for handheld, energy-conscious designs.
When designing with this ADC, place the AVCC decoupling capacitors within a few millimeters of the supply pins and keep the analog input traces short and symmetric to preserve common-mode rejection. Use the sleep (SHDN) pin aggressively between conversion bursts in low-duty-cycle applications to drop system consumption to the 12 uW range, which is roughly 460x lower than the active 5.5 mA.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB-layout design notes not collected in the manufacturer datasheet, giving engineers a single reference for evaluation and sourcing.
Alternativas drop-in para LTC2351HUH-14#TRPBF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LTC2351HUH-14#TRPBF (mesmo formato e footprint) — diferindo em Data Interface, Input Type, Package, Resolution, Sampling Rate.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LTC2351CUH-14#TRPBF
✅ Drop-In✓ Em estoque
$8.65 / unidade
Ver ficha técnica →LTC2351IUH-14#TRPBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2351HUH-14#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2351IUH-14#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2351CUH-14#PBF
✅ Drop-In✓ Em estoque
$9.4 / unidade
Ver ficha técnica →LTC2351HUH-14#TRPBF Classificações máximas e características elétricas
| Resolução | 14 bit |
| Taxa de amostragem | 1.5 Msps |
| Number of Input Channels | 6 (simultaneously sampled, differential) |
| Architecture | SAR (Successive Approximation Register) |
| Input Type | Differential, true bipolar input range |
| Tensão de alimentação | 3 V (single supply) |
| Supply Current (Active) | 5.5 mA typical |
| Supply Current (Sleep Mode) | 12 uW |
| Tensão de referência | Internal 2.5 V (external override supported) |
| Data Interface | Serial (LVCMOS-compatible) |
| Encapsulamento | 32-pin QFN (5 mm x 5 mm) |
| Package Code | UH (QFN-32) |
| Faixa de temperatura de operação | -40 C to +125 C (H grade) |
| Tipo de montagem | Surface Mount |
| Lead-Free / RoHS | Yes (#PBF suffix, RoHS compliant) |
| Tape & Reel Packaging | Yes (#TRPBF suffix) |
| Manufacturer | Analog Devices (formerly Linear Technology) |
Configuração de pinos do LTC2351HUH-14#TRPBF
| Pino 1 | AIN0+ — Differential analog input 0, positive |
| Pino 2 | AIN0- — Differential analog input 0, negative |
| Pino 3 | AIN1+ — Differential analog input 1, positive |
| Pino 4 | AIN1- — Differential analog input 1, negative |
| Pino 5 | AIN2+ — Differential analog input 2, positive |
| Pino 6 | AIN2- — Differential analog input 2, negative |
| Pino 7 | AIN3+ — Differential analog input 3, positive |
| Pino 8 | AIN3- — Differential analog input 3, negative |
| Pino 9 | AIN4+ — Differential analog input 4, positive |
| Pino 10 | AIN4- — Differential analog input 4, negative |
| Pino 11 | AIN5+ — Differential analog input 5, positive |
| Pino 12 | AIN5- — Differential analog input 5, negative |
| Pino 13 | REFCOMP — Reference bypass capacitor |
| Pino 14 | VREF — 2.5 V reference input/output (can be overdriven) |
| Pino 15 | GND — Analog ground |
| Pino 16 | AVCC — Analog 3 V supply |
| Pino 17 | OVR — Input overrange indicator |
| Pino 18 | SHDN — Sleep shutdown input (active high) |
| Pino 19 | SCK — Serial clock input |
| Pino 20 | SDO — Serial data output |
| Pino 21 | SDI — Serial data input (for daisy-chain) |
| Pino 22 | CONVST — Conversion start input |
| Pino 23 | BUSY — Conversion busy output |
| Pino 24 | CS — Chip select input |
| Pino 25 | RESET — Reset input |
| Pino 26 | NC — Not connected (per datasheet) |
| Pino 27 | NC — Not connected (per datasheet) |
| Pino 28 | NC — Not connected (per datasheet) |
| Pino 29 | NC — Not connected (per datasheet) |
| Pino 30 | NC — Not connected (per datasheet) |
| Pino 31 | GND — Analog ground |
| Pino 32 | GND — Analog ground / exposed pad |
Aplicações típicas
LTC2351HUH-14#TRPBF é adequado para 6 aplicaçãos: Three-Phase Power Metering, Multi-Axis Industrial Motion Control, Portable Battery-Powered Instrumentation, Multi-Channel Data Acquisition Modules, Automotive Sensor Cluster Digitization, Industrial Vibration and Acoustic Monitoring.
Three-Phase Power Metering
The LTC2351HUH-14 fits three-phase power metering because its six true-differential channels are sampled on a single CONVST edge, eliminating the phase error that multiplexed ADCs introduce between current and voltage channels. With 1.5 Msps aggregate throughput the converter captures the harmonic content of 50/60 Hz mains plus switching-noise spikes above 1 kHz for accurate fundamental and harmonic energy measurement. The 14-bit resolution is sufficient for Class 0.5 revenue-grade meters when paired with anti-alias filtering, and the differential inputs allow direct connection to current-transformer shunts without extra instrumentation amplifiers. The 5.5 mA / 3 V supply simplifies isolated power designs, and the serial LVCMOS output reduces optocoupler channel count on the isolated boundary.
Recomendado
Multi-Axis Industrial Motion Control
Six simultaneously sampled channels make the LTC2351HUH-14 a natural fit for multi-axis servo and motion-control feedback loops, where ADC latency skew between axes would translate directly into position error. Each axis current shunt or resolver-derived signal is captured on the same edge, then converted at 250 ksps per channel - enough bandwidth for 8 kHz current-loop closure on three motor phases plus auxiliary analog nodes. The SAR architecture provides deterministic latency that complements synchronous PWM, so software can subtract sample delay from the control law. The exposed pad on the QFN-32 package pulls heat out at full multi-channel throughput, while the industrial -40 C to +125 C H grade matches cabinet and outdoor enclosure temperatures.
Recomendado
Portable Battery-Powered Instrumentation
Portable and handheld test equipment benefits from the LTC2351HUH-14's 5.5 mA active supply current and 12 uW sleep-mode shutdown, which together give roughly 460x power reduction between burst acquisitions and idle states. The 32-pin QFN (5 mm x 5 mm) keeps the analog front end small enough for USB-powered oscilloscope front ends, sound-level meters, and field data loggers. A single 3 V lithium primary or rechargeable cell directly powers the analog rail with no LDO dropout penalty. The integrated 2.5 V reference can be overdriven with a precision external reference for calibrated-grade measurement, and the serial LVCMOS output reduces GPIO count on the host microcontroller.
Recomendado
Multi-Channel Data Acquisition Modules
Simultaneous-sampling data-acquisition modules for industrial PCs and modular I/O use the LTC2351HUH-14 to digitize thermocouples, strain gauges, and 4-20 mA loops with phase-coherent capture across all channels. The 14-bit SAR resolution comfortably exceeds the noise of typical sensor front ends after oversampling, and the 1.5 Msps aggregate rate supports 100 ksps per-channel oversampling for software averaging. The differential inputs accommodate both bipolar sensor signals and unipolar loops through a single channel, reducing the bill of materials. The QFN-32 footprint simplifies multi-board layouts where multiple LTC2351 devices can synchronize via a shared CONVST for higher channel-count systems.
Recomendado
Automotive Sensor Cluster Digitization
Sensor-cluster digitization in vehicles - including chassis, battery management and powertrain nodes - benefits from the LTC2351HUH-14's six simultaneous channels, which capture synchronized pressure, temperature and current readings from distributed sensors. The H-grade -40 C to +125 C temperature range matches under-hood and cabin ambient, although AEC-Q100 qualification is not explicitly stated in the datasheet so the part is normally placed in non-safety automotive applications. The 3 V single supply and 5.5 mA consumption ease integration with existing 12 V-to-3 V LDO rails, and the serial LVCMOS output reduces the wiring harness between the ADC and the host MCU or CAN transceiver.
Recomendado
Industrial Vibration and Acoustic Monitoring
Predictive-maintenance systems rely on phase-coherent multi-channel vibration and acoustic capture, which is exactly what the LTC2351HUH-14's six simultaneously sampled differential inputs deliver. The 1.5 Msps aggregate rate supports 20+ kHz acoustic capture plus 100+ kHz vibration analysis when oversampling is reduced, and the SAR core provides deterministic per-sample latency for accurate FFT windowing. Industrial piezoelectric accelerometers connect directly to the differential inputs, while MEMS microphones use the internal 2.5 V reference as a clean bias rail. The 12 uW sleep mode lets battery-powered vibration loggers record bursts on threshold events and sleep the rest of the time, dramatically extending field service intervals.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC2351HUH-14#TRPBF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LTC2351CUH-14#TRPBF | LTC2351IUH-14#TRPBF | LTC2351HUH-14#PBF | LTC2351IUH-14#PBF | LTC2351CUH-14#PBF |
|---|---|---|---|---|---|---|
| Brand | 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 | 32-QFN (5x5) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps |
| Input Channels | 6 (simultaneous, differential) | 6 (simultaneous, differential) | 6 (simultaneous, differential) | 6 (simultaneous, differential) | 6 (simultaneous, differential) | 6 (simultaneous, differential) |
| Temperature Grade | H (-40C to +125C) | C (0C to +70C) | I (-40C to +85C) | H (-40C to +125C) | I (-40C to +85C) | C (0C to +70C) |
| Supply Voltage | 3 V single supply | 3 V single supply | 3 V single supply | 3 V single supply | 3 V single supply | 3 V single supply |
| Packaging Form | Tape & Reel (#TRPBF) | Tape & Reel (#TRPBF) | Tape & Reel (#TRPBF) | Tray/Tube (#PBF) | Tray/Tube (#PBF) | Tray/Tube (#PBF) |
Principais diferenciais
- Six true-differential simultaneous-sampling channels in a single IC (vs LTC2309CUF)
- 1.5 Msps aggregate throughput at 5.5 mA supply current (vs LTC2309CUF)
- Industrial H-grade temperature range (-40 C to +125 C) (vs LTC2351CUH-14#TRPBF)
Notas de projeto
Place a 10 uF X7R ceramic plus a 0.1 uF X7R ceramic directly on the AVCC pin, with the smallest capacitor within 2-3 mm of the package. The exposed thermal pad must be soldered to a contiguous ground pour with multiple thermal vias to the inner ground plane. Per the LTC2351-14 datasheet, REFCOMP and VREF require their own 10 uF / 0.1 uF capacitor pair at the pin, and the analog ground pin must connect to the system ground at a single star point to prevent digital return currents from corrupting the analog reference.
Route each differential pair (AINx+ / AINx-) symmetrically with matched length and width, keeping them away from digital clock traces and from switching-converter nodes. Add a small RC anti-alias filter (typically 100 ohm + 1 nF) at each input to limit out-of-band noise; the filter corner must be well below half the per-channel sample rate (250 ksps for full 6-channel use). The CONVST and SCK traces should be guarded by ground traces on both sides to avoid capacitive coupling into the analog inputs.
Estimated: at 3 V supply and 5.5 mA active current, the LTC2351HUH-14 dissipates approximately 16.5 mW continuously. When sampling at the full 1.5 Msps aggregate rate, peak transient current can briefly exceed the steady 5.5 mA figure, so the AVCC rail should source at least 10 mA with low impedance across DC to 10 MHz. Use a low-noise LDO (such as the LT8640IUDC-1) rather than a switching regulator directly on the AVCC pin, and tie SHDN high via a 100 kohm resistor to keep the part awake at power-up.
Do not float SHDN - if left open the device behavior is undefined. Do not drive VREF from an external source higher than AVCC + 0.3 V or the reference buffer can latch. Ensure CONVST is debounced; a noisy start signal can cause the SAR to begin conversion mid-acquisition, which appears as gain error. Finally, the part is H-grade -40 C to +125 C, but if the end product spends time above 125 C (e.g. near an engine block) the C/I grade variants will fail - verify your system thermal map before swapping temperature grades.
Informações de conformidade
Lead-free RoHS compliance indicated by the #PBF suffix in the part number per the Analog Devices LTC2351-14 datasheet. AEC-Q100 status is not explicitly stated; the H-grade temperature range is -40 C to +125 C but the part is not marketed as AEC-Q100 qualified for safety-critical automotive designs.
