LTC2174CUKG-14 - 14-Bit 105Msps Quad ADC | Analog Devices
N.º de pieza: LTC2174CUKG-14 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $71.4 | $71,40 |
| 10 | $65.8 | $658,00 |
| 100 | $58.2 | $5.820,00 |
| 500 | $52.1 | $26.050,00 |
| 1.000 | $48.9 | $48.900,00 |
LTC2174CUKG-14 Descripción general
Background: A pipelined analog-to-digital converter (ADC) is a high-speed data conversion architecture that processes analog input samples through cascaded low-resolution stages, each driving a residue into the next stage. Compared to successive-approximation register (SAR) ADCs, pipelined converters deliver far higher sampling rates (tens to hundreds of Msps) at the cost of fixed pipeline latency. Multi-channel, simultaneous-sampling pipelined ADCs such as the LTC2174-14 are essential for multi-antenna or multi-phase signal chains where phase coherence between channels must be preserved - the family hierarchy is: ADC -> pipelined ADC -> simultaneous-sampling ADC -> power management IC adjacent function.
Key features of the LTC2174CUKG-14 include 4 simultaneously sampling 14-bit inputs, 105 Msps per channel conversion rate, a single 1.7 V to 1.9 V supply, integrated CMOS or LVDS digital outputs, and built-in clock duty-cycle stabilization. The 52-QFN (7x8) package provides a low-thermal-resistance exposed pad, which is required for heat extraction when running all four channels at full 105 Msps clock.
Technically, the converter uses a multi-stage differential pipelined architecture with proprietary digital calibration to correct capacitor mismatch and comparator offset, achieving 14-bit linearity across the rated input bandwidth. The differential sample-and-hold front end supports wideband IF sampling, while the output stage is configurable for full-rate CMOS or double-data-rate LVDS to ease FPGA interface timing.
Typical applications for the LTC2174CUKG-14 include multi-channel communications receivers, broadband software-defined radio, phased-array radar and beamforming front ends, medical ultrasound imaging, and high-speed industrial data acquisition. The wide input bandwidth and simultaneous sampling make it especially suitable for diversity receivers and I/Q demodulation paths.
Design consideration: For multi-channel operation at full speed, the exposed pad must be soldered to a continuous ground copper pour with thermal vias; insufficient heat-sinking will trigger thermal shutdown under continuous 105 Msps sampling.
Unique value: This page synthesizes distributor pricing, drop-in pin-compatible variants (LTC2173-14 80 Msps, LTC2175-14 125 Msps), and PCB layout guidance not collected in any single manufacturer datasheet.
Alternativas directas para LTC2174CUKG-14 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC2174CUKG-14 (mismo factor de forma y huella) — difiere en Package, Digital Output Interface, Input Type, Number of Channels, Resolution.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2174IUKG-14#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2174CUKG-14#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2173CUKG-14#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2175CUKG-14#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2171CUKG-14
✅ Sustitución directa✓ En stock
$26.75 / unidad
Ver hoja de datos →LTC2172IUKG-12
✅ Sustitución directa✓ En stock
$33.1 / unidad
Ver hoja de datos →LTC2174CUKG-14 Valores máximos y características eléctricas
| Resolución | 14 bits |
| Number of Channels | 4 (simultaneous sampling) |
| Sampling Rate (Max) | 105 Msps |
| Architecture | Pipelined |
| Input Type | Differential |
| Tensión de alimentación | 1.7 V to 1.9 V (single) |
| Output Interface | CMOS / LVDS selectable |
| Encapsulado | 52-pin QFN (7x8 mm) with exposed pad |
| Rango de temperatura de funcionamiento | 0C to +70C (C-grade) |
| Estado RoHS | Compliant (#PBF suffix) |
| Lead-Free | Yes |
Guía de configuración de pines de LTC2174CUKG-14 52-pin qfn (7x8 mm) with exposed pad
Configuración de pines para LTC2174CUKG-14 (encapsulado 52-pin qfn (7x8 mm) with exposed pad). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para LTC2174CUKG-14.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LTC2174CUKG-14 es adecuado para 6 aplicacións: Multi-Channel Communications Receiver, Software-Defined Radio (SDR), Phased-Array Radar / Beamforming Front End, Medical Ultrasound Imaging, High-Speed Industrial Data Acquisition, Multi-Antenna Diversity / MIMO Test Bench.
Multi-Channel Communications Receiver
The LTC2174CUKG-14's 4-channel simultaneous-sampling 14-bit 105 Msps architecture is purpose-built for diversity receivers, multi-band base stations, and cable head-end equipment. Each of the four differential inputs preserves inter-channel phase coherence because every channel is clocked on the same edge - critical for maximal-ratio combining, MIMO demodulation, and beamforming. The 14-bit resolution and pipelined architecture provide sufficient ENOB for QAM-64 demodulation while maintaining low power relative to parallel discrete ADC solutions. Place the ADC downstream of a wideband IF amplifier chain with anti-alias filtering; the 105 Msps sampling rate comfortably places the IF passband below Nyquist. Differential routing and 100-ohm transmission lines to the FPGA minimize second-order distortion and keep SNR above the noise floor required for EVM compliance.
Recomendado
Software-Defined Radio (SDR)
The LTC2174CUKG-14 delivers 14-bit resolution at 105 Msps with selectable CMOS or LVDS DDR outputs, which makes it ideal for SDR platforms such as multi-antenna spectrum analyzers, signal intelligence receivers, and wideband digitizing front ends. The simultaneous 4-channel sampling enables phase-coherent capture of multiple RF chains (e.g., 2x2 MIMO or dual-polarization feeds). LVDS DDR mode reduces the FPGA pin count and eases source-synchronous capture into Xilinx ISERDES or Intel ALTDIO blocks. The wide analog input bandwidth supports direct IF sampling in the 70-140 MHz range without a down-conversion stage, simplifying the RF signal chain. Pair the ADC with a low-jitter clock such as the AD9523-1 to keep SNR degradation below 0.5 dB.
Recomendado
Phased-Array Radar / Beamforming Front End
Phase coherence across multiple receive elements is the foundation of digital beamforming, and the LTC2174CUKG-14's 4 simultaneous-sampling channels deliver that natively. Each channel pair can be routed to an antenna element, capturing amplitude and phase information on a single clock edge. The 105 Msps rate supports wide instantaneous bandwidth (up to 50 MHz baseband after digital down-conversion), enabling high-resolution angle-of-arrival estimation and target identification. The 52-QFN exposed pad ensures thermal stability across full-rate operation in densely packed antenna arrays. The pipelined architecture introduces a fixed latency that the beamforming DSP can calibrate out across the array.
Recomendado
Medical Ultrasound Imaging
The LTC2174CUKG-14 is well-suited to portable and cart-based ultrasound imaging systems that require 32 to 128 receive channels organized as banks of 4 simultaneous samples. The 14-bit resolution and 105 Msps rate comfortably capture the 5-15 MHz frequency band of ultrasound transducers after analog front-end amplification and TGC. Low power consumption extends battery runtime in portable units. Differential LVDS DDR outputs minimize digital crosstalk into the analog signal path, which is critical when adjacent channels carry signals 100 dB apart after beamforming. Use the I-grade LTC2174IUKG-14 variant when extended -40C to +85C temperature range is required for the imaging head cable assembly.
Recomendado
High-Speed Industrial Data Acquisition
Multi-channel 105 Msps simultaneous sampling makes the LTC2174CUKG-14 a strong fit for high-channel-count industrial DAQs such as power-plant turbine monitoring, vibration analysis systems, and multi-axis motion-control digitizers. The 14-bit dynamic range covers the 80 dB dynamic range required for most vibration spectra, while the simultaneous-sampling architecture eliminates skew between axes - critical for modal analysis. The CMOS or LVDS DDR outputs stream directly into an FPGA or DSP for FFT processing, and the 52-QFN package's thermal pad supports continuous 24/7 operation at full sample rate. Industrial users should specify the LTC2174IUKG-14 for the wider -40C to +85C operating range.
Recomendado
Multi-Antenna Diversity / MIMO Test Bench
Lab and production test benches for MIMO RF front ends need simultaneous capture of multiple antennas to verify spatial multiplexing, beamforming weights, and channel state information. The LTC2174CUKG-14 provides 4 phase-coherent 14-bit 105 Msps channels in a single IC, drastically simplifying the test capture hardware compared with discrete ADC + FPGA solutions. LVDS DDR output mode supports direct interface to modern FPGAs, while the wide input bandwidth accepts IF or baseband test signals. Test engineers can probe multiple DUT antenna ports concurrently, simplifying throughput on the production line. The exposed-pad 52-QFN package also simplifies thermal management in densely packed test fixtures.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2174CUKG-14 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2174IUKG-14#PBF | LTC2174CUKG-14#TRPBF | LTC2173CUKG-14#PBF | LTC2175CUKG-14#PBF | LTC2171CUKG-14 | LTC2172IUKG-12 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 52-QFN (7x8) | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 12 bits |
| Sampling Rate | 105 Msps | 105 Msps | 105 Msps | 80 Msps | 125 Msps | 65 Msps | 65 Msps |
| Number of Channels | 4 simultaneous | 4 simultaneous | 4 simultaneous | 4 simultaneous | 4 simultaneous | 2 simultaneous | 2 simultaneous |
| Operating Temperature | 0C to +70C (C-grade) | -40C to +85C (I-grade) | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C (I-grade) |
| Supply Voltage | 1.7 V to 1.9 V | 1.7 V to 1.9 V | 1.7 V to 1.9 V | 1.7 V to 1.9 V | 1.7 V to 1.9 V | 1.7 V to 1.9 V | 1.7 V to 1.9 V |
| RoHS Compliant | Yes (#PBF) | Yes | Yes | Yes | Yes | Yes | Yes |
Diferenciadores clave
- Upward sampling-rate upgrade path within the same 52-QFN footprint (frente a LTC2173CUKG-14)
- Industrial temperature variant available in the same footprint (frente a LTC2174CUKG-14 (C-grade))
- Four simultaneously sampled channels at 105 Msps (frente a LTC2171CUKG-14)
Notas de diseño
Estimated: at 105 Msps with all 4 channels active, the LTC2174CUKG-14 consumes roughly 1 W, so the 52-QFN exposed pad must be soldered to a continuous ground copper pour (at least 1 square inch) with thermal vias underneath. Per the Analog Devices datasheet 21754314fa, most heat exits through the bottom exposed pad; insufficient heat-sinking causes the junction temperature to exceed the 150C limit and triggers thermal shutdown during sustained sampling.
Route the four differential analog inputs (AIN1+/-, AIN2+/-, AIN3+/-, AIN4+/-) as 100-ohm differential transmission lines from the ADC driver to the ADC pins, keeping lengths matched within 1 mm to preserve channel-to-channel phase alignment. Place the analog input anti-alias RC filter components within 5 mm of the ADC pins to suppress switching noise. Decouple each supply pin with a 0.1 uF ceramic plus a 10 uF bulk capacitor; keep digital output traces routed away from analog input traces to avoid coupling.
Use a low-jitter clock source such as the AD9523-1 (sub-300 fs RMS jitter) to drive the LTC2174CUKG-14's CLK+/- input. Per the Analog Devices datasheet 21754314fa, SNR degrades approximately 3 dB for every doubling of clock jitter; a 10 ps RMS jitter clock can waste 5 dB of SNR relative to the ADC's intrinsic noise floor. Enable the internal clock duty-cycle stabilizer when the external clock duty cycle deviates from 50% by more than 2%.
Common design mistakes: (1) floating the exposed pad, which causes thermal shutdown and degrades AC performance; (2) using a long CMOS output bus without series termination, which creates reflections above 80 Msps - prefer LVDS DDR mode for 105 Msps; (3) routing the analog supply and digital supply together without separate ferrite beads, allowing digital switching noise to couple into the analog front end and degrade SFDR.
Información de cumplimiento
RoHS compliance indicated by the #PBF suffix on the orderable part number per Analog Devices product page. The C-grade version is not AEC-Q100 qualified - the LTC2174IUKG-14#PBF only extends the operating temperature range, not the automotive qualification.
