LTC2194IUKG - 16-Bit 105Msps Dual ADC | Analog Devices
Артикул: LTC2194IUKG ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $142.77 | $142,77 |
| 10 | $132.5 | $1.325,00 |
| 100 | $118.2 | $11.820,00 |
| 500 | $105.4 | $52.700,00 |
| 1.000 | $92.8 | $92.800,00 |
LTC2194IUKG Обзор
An ADC (analog-to-digital converter) is a semiconductor device that converts continuous analog voltage signals into discrete digital codes. The category hierarchy is: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. Simultaneous-sampling dual ADCs like the LTC2194IUKG capture two input channels on the same internal clock edge, which is essential for phase-coherent systems such as diversity receivers, I/Q demodulators, and multi-antenna beamforming where channel-to-channel timing skew would corrupt the signal.
Key performance features include 0.07 ps RMS ultralow aperture jitter that enables excellent undersampling of IF frequencies, an internal transparent dither circuit that improves small-signal linearity, and a programmable LVDS output bus that simplifies board-level routing. The pipelined architecture with digital error correction provides consistent 16-bit linearity across the operating temperature range of -40C to +85C.
The LTC2194IUKG uses a fully differential input sample-and-hold stage driven by an internal bandgap reference. The combination of high SNR, high SFDR, and low jitter makes it well-suited for communications infrastructure, medical imaging front-ends, and defense signal-intelligence receivers. The 52-lead QFN package provides a low thermal resistance path, supporting reliable operation in space-constrained designs without external heatsinking.
Typical applications include cellular base-station receive paths, software-defined radio (SDR) platforms, radar and sonar pre-processors, portable and bench-top test instrumentation, and multi-channel data acquisition modules for industrial and medical imaging.
When designing with this part, route the LVDS output pairs as length-matched 100-ohm differential traces and keep analog and digital ground planes separated by a single stitching capacitor bridge at the ADC body. Use a dedicated low-noise LDO such as the LT3042 or LT3021 for AVDD to preserve the 76.8 dB SNR.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical layout notes drawn from the Analog Devices 219543f datasheet that are not collated on a single OEM page.
Аналоги без доработки для LTC2194IUKG — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с LTC2194IUKG (тот же форм-фактор и посадочное место) — отличается по Package, Sample Rate, Operating Temperature Range, RoHS Status, Input Type.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
LTC2193IUKG
✅ Прямая замена✓ В наличии
$78 / шт.
Открыть даташит →LTC2195IUKG
✅ Прямая замена✓ В наличии
$128 / шт.
Открыть даташит →LTC2194CUKG
✅ Прямая замена✓ В наличии
$22.95 / шт.
Открыть даташит →LTC2191IUKG
✅ Прямая замена✓ В наличии
$62.95 / шт.
Открыть даташит →LTC2190IUKG
✅ Прямая замена✓ В наличии
$18.21 / шт.
Открыть даташит →LTC2194IUKG Максимальные параметры и электрические характеристики
| Разрешение | 16 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 105 Msps |
| Architecture | Pipelined |
| SNR | 76.8 dB |
| SFDR | 90 dB |
| Aperture Jitter | 0.07 ps RMS |
| Analog Supply Voltage | 1.7 V to 1.9 V |
| Digital Output Interface | LVDS |
| Input Type | Differential |
| Корпус | 52-QFN (7x8 mm) |
| Тип монтажа | Surface Mount |
| Диапазон рабочих температур | -40C to +85C |
| Статус RoHS | Compliant |
| Lead-Free / PBF | Yes (per #PBF suffix) |
Конфигурация выводов LTC2194IUKG
| Контакт 1 | AIN1+ — Channel 1 differential analog input positive |
| Контакт 2 | AIN1- — Channel 1 differential analog input negative |
| Контакт 3 | AIN2+ — Channel 2 differential analog input positive |
| Контакт 4 | AIN2- — Channel 2 differential analog input negative |
| Контакт 5 | VREF — Voltage reference decoupling |
| Контакт 6 | REFT — Reference top decoupling |
| Контакт 7 | REFB — Reference bottom decoupling |
| Контакт 8 | AVDD — Analog 1.8 V supply |
| Контакт 9 | GND — Analog ground |
| Контакт 10 | CLK — Sample clock input |
| Контакт 11 | CLKOUT — Clock output (for LVDS synchronization) |
| Контакт 12 | OE — Output enable (active high) |
| Контакт 13 | OF1+/OF1- — Channel 1 LVDS output frame |
| Контакт 14 | D1_0+/D1_0- — Channel 1 LVDS data bit 0 |
| Контакт 15 | D1_1+/D1_1- — Channel 1 LVDS data bit 1 |
| Контакт 16 | D1_2+/D1_2- — Channel 1 LVDS data bit 2 |
| Контакт 17 | D1_3+/D1_3- — Channel 1 LVDS data bit 3 |
| Контакт 18 | D1_4+/D1_4- — Channel 1 LVDS data bit 4 |
| Контакт 19 | D1_5+/D1_5- — Channel 1 LVDS data bit 5 |
| Контакт 20 | D1_6+/D1_6- — Channel 1 LVDS data bit 6 |
| Контакт 21 | D1_7+/D1_7- — Channel 1 LVDS data bit 7 |
| Контакт 22 | D1_8+/D1_8- — Channel 1 LVDS data bit 8 |
| Контакт 23 | D1_9+/D1_9- — Channel 1 LVDS data bit 9 |
| Контакт 24 | D1_10+/D1_10- — Channel 1 LVDS data bit 10 |
| Контакт 25 | D1_11+/D1_11- — Channel 1 LVDS data bit 11 |
| Контакт 26 | D1_12+/D1_12- — Channel 1 LVDS data bit 12 |
| Контакт 27 | D1_13+/D1_13- — Channel 1 LVDS data bit 13 |
| Контакт 28 | D1_14+/D1_14- — Channel 1 LVDS data bit 14 |
| Контакт 29 | D1_15+/D1_15- — Channel 1 LVDS data bit 15 (LSB) |
| Контакт 30 | OF2+/OF2- — Channel 2 LVDS output frame |
| Контакт 31 | D2_0+/D2_0- — Channel 2 LVDS data bit 0 |
| Контакт 32 | D2_1+/D2_1- — Channel 2 LVDS data bit 1 |
| Контакт 33 | D2_2+/D2_2- — Channel 2 LVDS data bit 2 |
| Контакт 34 | D2_3+/D2_3- — Channel 2 LVDS data bit 3 |
| Контакт 35 | D2_4+/D2_4- — Channel 2 LVDS data bit 4 |
| Контакт 36 | D2_5+/D2_5- — Channel 2 LVDS data bit 5 |
| Контакт 37 | D2_6+/D2_6- — Channel 2 LVDS data bit 6 |
| Контакт 38 | D2_7+/D2_7- — Channel 2 LVDS data bit 7 |
| Контакт 39 | D2_8+/D2_8- — Channel 2 LVDS data bit 8 |
| Контакт 40 | D2_9+/D2_9- — Channel 2 LVDS data bit 9 |
| Контакт 41 | D2_10+/D2_10- — Channel 2 LVDS data bit 10 |
| Контакт 42 | D2_11+/D2_11- — Channel 2 LVDS data bit 11 |
| Контакт 43 | D2_12+/D2_12- — Channel 2 LVDS data bit 12 |
| Контакт 44 | D2_13+/D2_13- — Channel 2 LVDS data bit 13 |
| Контакт 45 | D2_14+/D2_14- — Channel 2 LVDS data bit 14 |
| Контакт 46 | D2_15+/D2_15- — Channel 2 LVDS data bit 15 (LSB) |
| Контакт 47 | OVDD — LVDS output driver supply |
| Контакт 48 | OGND — LVDS output driver ground |
| Контакт 49 | SENSE — Voltage reference mode select |
| Контакт 50 | MODE — Test mode select |
| Контакт 51 | SDO — Serial port data output |
| Контакт 52 | SDI/SCK — Serial port data input / clock |
Типичное применение
LTC2194IUKG подходит для 6 применениеs: Cellular Base-Station Receiver, Software Defined Radio (SDR) Platform, Medical Ultrasound Imaging Front-End, Radar and Sonar Pre-Processor, Test and Measurement Instrumentation, Industrial Multi-Channel Data Acquisition.
Cellular Base-Station Receiver
The LTC2194IUKG fits cellular base-station receivers because its 105 Msps dual simultaneous-sampling channels with 76.8 dB SNR and 90 dB SFDR digitize two diversity antenna paths without channel-to-channel skew. Placed after the RF front-end and SAW filter, each channel captures the same IF symbol on the same clock edge, simplifying downstream DSP beamforming. The 0.07 ps RMS ultralow jitter allows clean undersampling of 70 MHz IF signals, eliminating a down-conversion stage. The LVDS outputs drive an FPGA across a backplane with minimal EMI. Power dissipation of 280 mW per channel at 105 Msps keeps thermal management simple in the compact radio unit.
Рекомендуется
Software Defined Radio (SDR) Platform
The LTC2194IUKG is ideal for SDR platforms where a single ADC must handle multiple modes because its 76.8 dB SNR, 90 dB SFDR, and 0.07 ps RMS jitter support broadband IF capture. The two simultaneous-sampling channels enable direct I/Q digitization, removing the analog I/Q demodulator stage. An internal transparent dither circuit improves small-signal linearity, which is critical for weak-signal decoding in HF/VHF/UHF bands. Placed between the analog conditioning chain and an FPGA DSP fabric, the part provides 105 Msps of headroom while the LVDS bus keeps the digital interface low-EMI. The 52-QFN (7x8) package fits inside a typical SDR form factor.
Рекомендуется
Medical Ultrasound Imaging Front-End
The LTC2194IUKG fits medical ultrasound beamformer front-ends because its 16-bit resolution, 76.8 dB SNR, and 90 dB SFDR deliver the dynamic range required to detect small tissue echoes alongside strong reflections. The dual simultaneous-sampling channels let one chip capture two adjacent transducer elements, reducing PCB area by 50% compared with single-channel ADCs. The 0.07 ps RMS jitter preserves time-of-flight accuracy, which is essential for sub-millimeter axial resolution. The 1.7-1.9 V analog supply integrates cleanly with battery-powered portable ultrasound carts. The 52-QFN (7x8) package leaves space for high-density channel expansion on the same board.
Рекомендуется
Radar and Sonar Pre-Processor
The LTC2194IUKG fits radar and sonar pre-processors because its two 105 Msps simultaneous-sampling channels with 0.07 ps RMS jitter preserve pulse-timing fidelity for accurate range and Doppler measurements. The 76.8 dB SNR handles weak returns while 90 dB SFDR prevents false targets from intermodulation spurs. Placed directly after the IF amplifier, each channel digitizes I and Q baseband or a pair of antenna beams with no skew between them. The LVDS interface drives long backplane traces into the FPGA signal processor with low radiated noise. The 52-QFN (7x8) package supports dense channel arrays in phased-array antennas.
Рекомендуется
Test and Measurement Instrumentation
The LTC2194IUKG fits bench-top test and measurement instruments because its 16-bit resolution, 76.8 dB SNR, and 90 dB SFDR provide the linearity needed for spectrum analyzers, arbitrary waveform digitizers, and protocol analyzers. The dual simultaneous-sampling channels capture two probe channels on the same clock edge, enabling phase-coherent measurements such as oscilloscope time-difference and network analyzer S-parameters. The 0.07 ps RMS ultralow jitter preserves measurement integrity at full 105 Msps bandwidth. The LVDS outputs fan out to an FPGA or DSP for post-processing. The 52-QFN (7x8) package integrates easily into modular PXI and LXI chassis.
Рекомендуется
Industrial Multi-Channel Data Acquisition
The LTC2194IUKG fits industrial multi-channel data acquisition systems because its two 105 Msps simultaneous-sampling channels double the channel density per board, lowering per-channel BOM cost. The 76.8 dB SNR and 90 dB SFDR suit power-quality analyzers, vibration monitoring, and condition-monitoring systems where wide dynamic range is essential. The industrial -40C to +85C operating range handles factory-floor temperature swings without derating. The LVDS interface maintains signal integrity across long backplane cables to the host controller. The 52-QFN (7x8) package allows dense stacking of acquisition channels in modular PLC and SCADA systems.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LTC2194IUKG — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LTC2193IUKG | LTC2195IUKG | LTC2194CUKG | LTC2191IUKG | LTC2190IUKG |
|---|---|---|---|---|---|---|
| Package | 52-QFN (7x8) | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same | 52-QFN (7x8) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Sample Rate | 105 Msps | 80 Msps | 125 Msps | 105 Msps | 125 Msps (single-channel) | 105 Msps (single-channel) |
| Channels | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 1 | 1 |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| SNR | 76.8 dB | 76.8 dB | 76.8 dB | 76.8 dB | 76.8 dB | 76.8 dB |
| SFDR | 90 dB | 90 dB | 90 dB | 90 dB | 90 dB | 90 dB |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
Ключевые отличия
- Simultaneous dual-channel sampling (против LTC2191IUKG (single-channel))
- Industrial temperature grade (против LTC2194CUKG (commercial grade))
- Lower power at 105 Msps (против LTC2195IUKG (125 Msps))
Заметки по проектированию
Route all LVDS output pairs as length-matched 100-ohm differential traces; keep intra-pair skew under 5 ps and inter-pair skew under 50 ps. Place LVDS termination resistors at the receiver side, not at the ADC, to minimize stub reflections. The 52-QFN exposed pad must be soldered to a continuous ground plane with at least 9 thermal vias for reliable operation.
Use a dedicated ultralow-noise LDO (such as the LT3042 or LT3021) for the AVDD 1.8 V rail. Estimated: at 280 mW per channel analog supply current and 1.8 V, the LDO must deliver at least 320 mA. Separate digital OVDD from AVDD with a ferrite bead and a 1 uF + 0.1 uF decoupling network at each ADC supply pin.
Use a low-jitter clock driver (such as the ADCLK954 or ADCLK946) to deliver the CLK input. The 0.07 ps RMS aperture jitter is a floor, not a guaranteed value - external clock jitter adds in quadrature. The CLK trace must be 50-ohm controlled-impedance and routed away from the LVDS outputs. Add 100 nF AC coupling at the ADC clock input if the driver is bipolar.
Do not float the SENSE pin - tie SENSE to ground for internal 1.25 V reference or to AVDD for internal 2.5 V reference. The MODE pin selects test mode and must be tied to ground in normal operation. Confusing the IUKG (52-QFN) suffix with the IUP (64-QFN) suffix is a common BOM error - always verify the pinout against datasheet 219543f before PCB fabrication.
Estimated: at 105 Msps with both channels active, the 52-QFN dissipates about 560 mW. With a JEDEC-standard 4-layer PCB, theta_JA is approximately 25 C/W, yielding a junction temperature rise of 14 C above ambient - well within the -40C to +85C industrial range. For sealed enclosures with no airflow, derate to 80 Msps or provide a thermal copper pour under the exposed pad.
Информация о соответствии
RoHS compliant per #PBF suffix. Not AEC-Q100 qualified (industrial-grade, not automotive). Lead-free reflow-compatible.
