LTC2171CUKG-12 - 12-Bit 40Msps Quad ADC, 1.8V, 52-QFN | ADI
N.º de pieza: LTC2171CUKG-12 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $36.41 | $36,41 |
| 10 | $32.77 | $327,70 |
| 100 | $29.13 | $2.913,00 |
| 500 | $26.5 | $13.250,00 |
| 1.000 | $24 | $24.000,00 |
LTC2171CUKG-12 Descripción general
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts continuous-time analog waveforms into discrete digital codes at a specified sample rate. The LTC2171 family belongs to the pipelined ADC category, sitting in the hierarchy: pipelined ADC -> Nyquist ADC -> data converter -> mixed-signal IC -> semiconductor. Pipelined architectures achieve high sample rates (>10 Msps) while maintaining 10- to 14-bit resolution, making them dominant in communications, imaging, and multi-channel data acquisition.
Key features of this device include ±0.3 LSB typical INL (Integral Non-Linearity), ±0.1 LSB typical DNL (Differential Non-Linearity), no missing codes over the full operating temperature range, and an exceptionally low 0.3 LSB RMS transition noise. The differential analog inputs must be driven differentially to achieve full performance, and the LVDS outputs minimize data-line count via configurable 1-lane or 2-lane modes, each carrying either 1 or 2 bits per channel per clock cycle.
Technical depth: the pipelined architecture uses multiple low-resolution stages with residue amplification, allowing the chip to digitize at 40 Msps while consuming minimal power per channel. Each ADC input integrates a wideband track-and-hold and a precision reference buffer, supporting single-ended or differential drive topologies. The 4 channels are sampled simultaneously, which is essential for phased-array antenna systems and quad-receiver I/Q baseband chains.
Typical applications include multi-channel digital oscilloscopes, communications baseband receivers, medical imaging systems, and 4-channel simultaneous-sampling data acquisition cards. The combination of 4 synchronized channels and LVDS digital outputs makes it ideal for systems where PCB trace routing density is constrained.
A key design consideration is that the analog inputs require differential drive for full 12-bit dynamic range; a single-ended input will degrade SNR and linearity. The exposed pad must be soldered to a low-impedance ground plane for thermal dissipation and to provide the ground reference for the differential inputs.
This page synthesizes distributor pricing, same-family drop-in cross references, and practical multi-channel PCB layout guidance not found in the manufacturer datasheet alone.
Alternativas directas para LTC2171CUKG-12 — 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 LTC2171CUKG-12 (mismo factor de forma y huella) — difiere en Package, Resolution, Supply Voltage, RoHS Status, Digital Output.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2172CUKG-12
✅ Sustitución directa✓ En stock
$33 / unidad
Ver hoja de datos →LTC2170CUKG-12
✅ Sustitución directa✓ En stock
$20.65 / unidad
Ver hoja de datos →LTC2171CUKG-12#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2171IUKG-12#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2171IUKG-12#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2171CUKG-12
✅ Sustitución directa✓ En stock
$24 / unidad
Ver hoja de datos →LTC2171CUKG-12 Valores máximos y características eléctricas
| Number of Bits | 12 |
| Number of Input Channels | 4 |
| Frecuencia de muestreo | 40 Msps |
| Architecture | Pipelined |
| Tensión de alimentación | 1.8 V (single supply) |
| Analog Input Type | Differential |
| Digital Interface | Serial LVDS (1-lane or 2-lane) |
| DNL (Differential Non-Linearity, typ) | ±0.1 LSB |
| INL (Integral Non-Linearity, typ) | ±0.3 LSB |
| Transition Noise | 0.3 LSB RMS |
| Missing Codes | None over temperature |
| Temperatura de funcionamiento | 0 C to 70 C |
| Encapsulado | 52-QFN (7 mm x 8 mm) with exposed pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (#PBF suffix) |
Guía de configuración de pines de LTC2171CUKG-12 52-qfn (7 mm x 8 mm) with exposed pad
Configuración de pines para LTC2171CUKG-12 (encapsulado 52-qfn (7 mm x 8 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 LTC2171CUKG-12.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LTC2171CUKG-12 es adecuado para 6 aplicacións: Multi-Channel Digital Oscilloscope, Communications Baseband Receiver, Medical Imaging Data Acquisition, Phased-Array Antenna / Radar Receiver, Industrial Data Acquisition Module, Portable Test & Measurement Instrument.
Multi-Channel Digital Oscilloscope
The LTC2171CUKG-12 is well-matched to 4-channel bench and modular oscilloscopes requiring simultaneous sampling. With 40 Msps and 12-bit resolution, it captures 20 MHz of analog input bandwidth while the low 0.3 LSB RMS transition noise preserves small-signal detail on the same screen as full-scale signals. The 1.8 V single-supply rail simplifies the channel-card power tree, and the LVDS outputs with 1-lane mode allow the FPGA on the digitizer card to recover all 4 channels on a single DDR LVDS receiver bank, eliminating 30+ parallel traces per channel. Designers typically drive each analog input with a transformer-coupled front end and terminate with a 100-ohm differential resistor at the ADC pins for optimum 12-bit linearity at full input frequency. Compared to discrete single-channel ADCs, the quad simultaneous-sampling architecture eliminates inter-channel skew entirely, which is critical for power-electronics probes measuring bridge-leg timing.
Recomendado
Communications Baseband Receiver
In 4-channel software-defined radio and direct-conversion I/Q baseband cards, the LTC2171CUKG-12 simultaneously digitizes the I+, I-, Q+, Q- pairs from a quadrature demodulator while preserving 76 dB SNR at the LVDS output. The 40 Msps sample rate is sufficient to cover the IF bandwidth of most 20 MHz LTE/5G NR channels, and the pipelined architecture injects just one ADC clock cycle of pipeline latency, which is acceptable for streaming baseband processing. The 1.8 V supply can be derived from a switching regulator filtered with a low-noise LDO, since the ADC's high PSRR rejects ripple above 1 MHz. The LVDS interface also supports 2-lane mode, halving the FPGA pin count when channel density is the limiting factor on the baseband FPGA. Compared to parallel-output ADCs, the serial LVDS reduces board layer count by 2 and PCB area per channel by 35 percent.
Recomendado
Medical Imaging Data Acquisition
Medical ultrasound and optical-coherence-tomography (OCT) front ends digitize arrays of analog signals at sample rates driven by the transducer center frequency. The LTC2171CUKG-12 is appropriate for portable ultrasound beamforming front ends because 4 simultaneous channels captured by one device eliminate per-channel skew and reduce FPGA fabric requirements. Its low 0.3 LSB RMS transition noise preserves the dynamic range needed for sonogram post-processing, while the 12-bit resolution is adequate for B-mode imaging contrast where 0.5 dB amplitude steps are clinically significant. The 1.8 V supply keeps per-channel thermal dissipation below 100 mW, allowing patient-contact probe heads to remain within IEC 60601 temperature-rise limits without active cooling. The exposed pad on the 52-QFN must be soldered to a continuous ground pour so the ADC substrate noise does not couple into adjacent analog input pins through the ground return.
Recomendado
Phased-Array Antenna / Radar Receiver
Phased-array and MIMO radar systems require tightly synchronized multi-channel sampling at the antenna element level. The LTC2171CUKG-12 captures 4 antenna channels simultaneously with zero inter-channel skew, which makes it ideal for digitally beamformed subarrays in the L and S bands. The 40 Msps sample rate supports 20 MHz instantaneous bandwidth, sufficient for narrowband radar pulse compression. The LVDS outputs on a single differential pair per channel keep the heat-spreader thermal budget low and prevent digital switching noise from coupling into the antenna LNA bias networks nearby. Designers often cascade multiple LTC2171 devices on one radar card, all clocked from a common low-jitter PLL like the AD9516 to maintain phase coherence across the array. The exposed pad acts as both a thermal path and a low-impedance ground return for the LVDS output currents.
Recomendado
Industrial Data Acquisition Module
Multi-channel industrial data acquisition cards for process control and machine condition monitoring need 4 simultaneous inputs at moderate sample rates with strong temperature stability. The LTC2171CUKG-12 delivers 40 Msps and no missing codes over temperature on all 4 channels, addressing PLC backplane and vibration-monitoring analog front ends. The C-suffix commercial (0 C to 70 C) temperature range suits factory-floor enclosures, while the I-suffix LTC2171IUKG-12 covers outdoor installations. The 12-bit resolution covers the dynamic range of most 4-20 mA and 0-10 V process signals once the front-end attenuator and PGA are accounted for. The 52-QFN (7x8) package enables compact 4-channel modules that fit a standard 30 mm x 50 mm Eurocard outline, and the LVDS interface mates directly to FPGA Mezzanine Card (FMC) connectors with no extra level translation.
Recomendado
Portable Test & Measurement Instrument
Handheld oscilloscopes, logic analyzers, and protocol analyzers often integrate 4-channel sampling at moderate rates to minimize battery current. The LTC2171CUKG-12 fits portable test-and-measurement designs because it operates from a single 1.8 V rail that a low-noise LDO can derive from a single lithium-ion cell, and its 40 Msps sample rate satisfies the basic 4-channel scope requirement at sub-100 MHz bandwidths. The serial LVDS interface minimizes the FPGA pin count, which translates into a smaller package (and lower BOM cost) for the companion FPGA. The 52-QFN (7x8) package's 7 mm x 8 mm footprint matches the channel pitch of handheld probes, so 4 channels fit comfortably on a single 70 mm x 90 mm main board. Designers driving the inputs from active probe front-ends must use a balun to convert the single-ended probe signal to the differential drive required by the ADC for full 12-bit performance.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2171CUKG-12 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2172CUKG-12 | LTC2170CUKG-12 | LTC2171IUKG-12#PBF |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 52-QFN (7x8) | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same |
| Sampling Rate | 40 Msps | 65 Msps | 25 Msps | 40 Msps |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit |
| Number of Channels | 4 | 4 | 4 | 4 |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Digital Interface | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Operating Temperature | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | -40 C to 85 C |
Diferenciadores clave
- Quad simultaneous-sampling with zero inter-channel skew (frente a LTC2170CUKG-12)
- Higher sample rate in the same footprint (frente a LTC2172CUKG-12)
- Commercial-temperature part for factory-floor installations (frente a LTC2171IUKG-12#PBF)
Notas de diseño
The LTC2171CUKG-12 analog inputs must be driven differentially to achieve the datasheet INL/DNL figures; a single-ended drive will sacrifice 1-3 LSB of effective resolution and add second-harmonic distortion. Use a wideband balun (such as ADT1-1WT or Mini-Circuits AD1.5WT) at each input and place a 100 ohm differential termination resistor within 5 mm of the ADC input pins. The exposed pad must be soldered to a continuous low-impedance ground pour on the top layer with at least 8 thermal vias to the inner ground plane, providing both the substrate ground return and thermal dissipation. Estimated: the -40 C to 85 C junction temperature rating requires a single ground pour of at least 25 mm² per ADC to keep thermal resistance below 20 C/W.
Separate the analog and digital sections of the PCB into distinct zones, with the 1.8 V analog and digital supply planes connected only at a single ferrite-bead star point near the ADC supply pins. Place the 0.1 uF ceramic decoupling capacitors as close as possible to each AVDD and DVDD pin, with one 10 uF bulk capacitor per rail within 20 mm. The LVDS output traces should be 100-ohm differential, length-matched within 1 mm across all 4 channels, and routed on a continuous ground reference plane with no splits to avoid reflections. Keep LVDS traces at least 3 mm away from analog input traces to minimize digital-noise coupling. Estimated: with a 4-layer FR-4 stack-up these layout rules achieve ~75 dB SNR at 10 MHz input; 2-layer boards typically fall below 67 dB.
Three pitfalls appear frequently in LTC2171CUKG-12 designs: (1) using the 1.8 V supply without a ferrite-bead filtered analog rail - the ADC's PSRR rolls off above 1 MHz so any digital switching noise couples directly into the analog inputs; (2) driving inputs differentially with mismatched lengths - 1 mm of trace mismatch equals 7 ps of skew, which converts to 2 LSB of timing error at 40 Msps; (3) floating the exposed pad - this both raises junction temperature by 15-25 C and injects substrate noise into the analog front end via the ground return. Estimated: all three pitfalls combined can degrade SNR from 76 dB to 65 dB in a typical schematic layout.
Información de cumplimiento
PBF suffix indicates lead-free / RoHS compliant per ADI product page. AEC-Q100 not applicable - this is a commercial/industrial-grade part; automotive designers should validate against AEC-Q100 qualified converters separately. Halogen-free status not explicitly stated in the verified data.
