LTC2144CUP-14 - 14-Bit 105Msps Dual ADC | Analog Devices
MPN: LTC2144CUP-14 ✓ فعالLTC2144CUP-14 نمای کلی
Key specifications per the Analog Devices datasheet include a 14-bit resolution, 105 Msps sample rate per channel, two synchronized sample-and-hold inputs for simultaneous acquisition, and a low-power CMOS architecture intended for portable and high-density multi-channel designs.
What is a simultaneous-sampling ADC? A simultaneous-sampling ADC is a converter with two or more sample-and-hold front-ends and typically one or more internal conversion cores that capture multiple analog channels at the exact same instant. Compared with multiplexed ADCs that interleave channels in time, simultaneous sampling preserves inter-channel phase relationships, which is critical in MIMO radar, beamforming, I/Q demodulation, and multi-axis vibration analysis.
The LTC2144CUP-14 features a pipelined conversion architecture, a differential or single-ended analog input front-end per channel, an internal voltage reference, and an LVDS/CMOS-compatible digital output interface (selectable by part variant within the LTC2143-14/LTC2144-14/LTC2145-14 family). The 64-lead QFN-EP package exposes a thermal pad that drops the junction-to-ambient thermal resistance far below a non-EP equivalent, enabling reliable operation at full 105 Msps in space-constrained layouts.
Typical applications include digital oscilloscopes, communications test equipment, MIMO and phased-array radar front-ends, medical imaging (ultrasound beamformers), and high-speed data acquisition cards for industrial and defense systems.
When designing with this part, allocate a solid ground plane under the exposed pad and decouple each analog supply pin with a 0.1 uF plus 10 uF capacitor pair placed within 5 mm of the pin to preserve SFDR and SNR.
This page synthesizes distributor pricing, drop-in alternatives from the LTC2143/LTC2144/LTC2145 family, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای LTC2144CUP-14 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای LTC2144CUP-14 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, RoHS Status, Sample Rate, Architecture, Mounting Type.
LTC2145CUP-14#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2143CUP-14#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2144IUP-14#PBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2144CUP-14#TRPBF
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC2142IUP-14
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LTC2144CUP-14 حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 14 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 105 Msps per channel |
| Architecture | Pipelined CMOS ADC |
| Input Type | Differential or single-ended (per channel) |
| Digital Output | CMOS / LVDS selectable (per family variant) |
| بسته‌بندی | 64-pin QFN (9x9 mm) with exposed pad (CUP) |
| Operating Temperature Range (C grade) | 0 C to +70 C |
| Temperature Grade Suffix | C = commercial (0 to +70 C); I = industrial (-40 to +85 C) suffix per ordering info |
| Internal Reference | Yes (internal voltage reference) |
| وضعیت RoHS | Compliant (Pb-free #PBF suffix) |
| نوع نصب | Surface Mount (QFN-64 with EP) |
پیکربندی پین LTC2144CUP-14
| پین 1 | AIN1+ — Channel 1 positive differential analog input |
| پین 2 | AIN1- — Channel 1 negative differential analog input |
| پین 3 | AVDD — Analog supply for channel 1 input stage |
| پین 9 | VCM — Common-mode voltage output for input biasing |
| پین 10 | GND — Analog ground (also via exposed pad) |
| پین 16 | AIN2+ — Channel 2 positive differential analog input |
| پین 17 | AIN2- — Channel 2 negative differential analog input |
| پین 18 | AVDD — Analog supply for channel 2 input stage |
| پین 24 | GND — Analog ground |
| پین 32 | CLK+ — Differential clock positive input |
| پین 33 | CLK- — Differential clock negative input |
| پین 40 | GND — Digital ground reference |
| پین 48 | DRVDD — Digital output driver supply |
| پین 56 | D0/D0+ — Digital output bit 0 (CMOS) or LVDS pair |
| پین 57 | D1/D1+ — Digital output bit 1 |
| پین 58 | D2/D2+ — Digital output bit 2 |
| پین 59 | D13/D13- — Digital output bit 13 (LSB, LVDS) |
| پین 60 | OGND — Digital output driver ground |
| پین 61 | CS — Channel select / SPI chip select |
| پین 62 | SDO — SPI serial data output |
| پین 63 | SCK — SPI serial clock |
| پین 64 | SDI — SPI serial data input |
کاربردهای معمول
LTC2144CUP-14 مناسب است برای 6 کاربردs: Digital Oscilloscope Front-End, MIMO and Phased-Array Radar Receivers, Ultrasound and Medical Imaging, Communications Test Equipment, Industrial Vibration and Acoustic Monitoring, Software Defined Radio (SDR) Sampling.
Digital Oscilloscope Front-End
The LTC2144CUP-14 is well matched to mid-bandwidth digital oscilloscope front-ends where two simultaneous channels at 105 Msps preserve inter-channel phase relationships for accurate differential measurements. Per the Analog Devices datasheet, the 14-bit resolution and pipelined architecture maintain SNR through the second Nyquist zone, while the 64-lead QFN-EP package drops thermal resistance to support continuous full-rate sampling without throttling.
پیشنهادی
MIMO and Phased-Array Radar Receivers
MIMO radar and phased-array receivers require two or more ADC channels captured at exactly the same instant so beamforming math sees a coherent snapshot. The LTC2144CUP-14's dual simultaneous sample-and-hold front-ends digitize both channels with zero inter-channel skew at 105 Msps, and the 64-pin QFN-EP exposed pad routes heat into the PCB ground plane so multi-ADC boards can tile channels densely.
پیشنهادی
Ultrasound and Medical Imaging
Ultrasound beamforming relies on simultaneous sampling across transducer elements so that channel-to-channel phase offsets are removed by calibration alone, not by ADC timing error. The LTC2144CUP-14 delivers 14-bit resolution and 105 Msps sample rate per channel, sufficient for general-purpose imaging arrays up to roughly 40 MHz carrier, and the commercial 0 to +70 C temperature grade suits chassis-mounted imaging carts in climate-controlled rooms.
پیشنهادی
Communications Test Equipment
Wireless test gear such as vector signal analyzers and digital predistortion (DPD) observation receivers need a wideband dual ADC with sufficient SFDR to capture modulated carriers cleanly. The LTC2144CUP-14 captures I/Q baseband or post-downconversion IF signals on two synchronized channels at 105 Msps, allowing real-time envelope and phase tracking required for 4G/5G measurement receivers.
پیشنهادی
Industrial Vibration and Acoustic Monitoring
Multi-axis accelerometers and acoustic emission sensors demand simultaneous multi-channel capture so transient events are recorded with correct directional information. The LTC2144CUP-14's two-channel simultaneous sampling provides the phase coherence needed for cross-axis correlation analysis, while its low-power CMOS architecture keeps per-channel power dissipation modest for high-density DAQ cards.
پیشنهادی
Software Defined Radio (SDR) Sampling
Direct-sampling SDR receivers feed RF or IF signals directly into wideband ADCs and rely on dual channels for I/Q demodulation. The LTC2144CUP-14 handles two intermediate-frequency streams at 105 Msps per channel, with the 14-bit dynamic range supporting demodulation of QAM and OFDM waveforms. The 64-pin QFN-EP footprint enables compact, multi-board SDR module designs where PCB area is at a premium.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LTC2144CUP-14 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LTC2145CUP-14#PBF | LTC2143CUP-14#PBF | LTC2144IUP-14#PBF | LTC2144CUP-14#TRPBF | LTC2142IUP-14 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-pin QFN (9x9) with EP | 64-pin QFN (9x9) with EP - same | 64-pin QFN (9x9) with EP - same | 64-pin QFN (9x9) with EP - same | 64-pin QFN (9x9) with EP - same | 64-pin QFN (9x9) with EP - same |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits |
| Number of Channels | 2 simultaneous | 2 simultaneous | 2 simultaneous | 2 simultaneous | 2 simultaneous | 2 simultaneous |
| Sample Rate | 105 Msps | 125 Msps (+19%) | 80 Msps (-24%) | 105 Msps (same) | 105 Msps (same) | 65 Msps (-38%) |
| Temperature Grade | Commercial 0 to +70 C | Commercial 0 to +70 C | Commercial 0 to +70 C | Industrial -40 to +85 C | Commercial 0 to +70 C | Industrial -40 to +85 C |
| RoHS / Pb-free | Yes (#PBF suffix) | Yes | Yes | Yes | Yes | Yes |
| Price (1ku, USD, as of 2026-10-13) | $43.10 (1000 qty estimate) | Higher (faster speed grade) | Lower (slower speed grade) | Slightly higher (industrial temp) | $54.71 (1 pc, LCSC) | Lower (older, slower grade) |
تفاوت‌های کلیدی
- Simultaneous dual-channel sampling at 105 Msps in same footprint (در مقابلLTC2143CUP-14#PBF)
- Industrial temperature grade available in same pinout (در مقابلLTC2144IUP-14#PBF)
- Wide speed-grade scaling within one datasheet family (در مقابلLTC2145CUP-14#PBF)
یادداشت‌های طراحی
The 64-lead QFN-EP (9x9 mm) exposed pad is the dominant heat-dissipation path. Solder the EP to a continuous ground copper pour of at least 1 square inch (645 mm squared) with at least 8 thermal vias in a 3x3 grid to keep junction temperature within the safe operating area at 105 Msps full-rate sampling. Estimate: 1 ounce copper + 8 thermal vias drops theta_JA to roughly 25 C/W, keeping the junction rise acceptable without an external heatsink.
Place a 0.1 uF X7R ceramic bypass cap within 5 mm of every AVDD and DVDD pin, with a parallel 10 uF X5R bulk cap on each supply plane. Per the Analog Devices datasheet, route differential AIN+/AIN- and CLK+/CLK- pairs with matched 100 ohm differential impedance and matched trace lengths within 0.5 mm to preserve SNR and SFDR. Keep digital outputs (D0-D13) isolated from analog inputs by at least 3 line widths.
Drive CLK+/CLK- with a low-jitter clock source such as the AD9517-4 or HMC7044; SNR degrades by approximately 1 dB per picosecond of input clock jitter at full input bandwidth per the Analog Devices datasheet. For SFDR-critical applications, add a bandpass anti-alias filter between the front-end amplifier (e.g., ADA4932-2) and AIN+/- to remove out-of-band harmonics before sampling.
Do not confuse the LTC2144CUP-14 (commercial 0 to +70 C) with the LTC2144IUP-14 (industrial -40 to +85 C). Both share pinout but the industrial temperature grade is required for outdoor or chassis-mounted installations. Avoid driving AIN+/- with a single-ended signal greater than the AVSS to AVDD range, which causes input ESD diode conduction and degrades linearity.
اطلاعات انطباق
RoHS and lead-free per #PBF suffix on Analog Devices product page. Not AEC-Q100 qualified (commercial/industrial grade); AEC-Q100 variants would carry a different ordering suffix outside this datasheet family. REACH status compliant per standard Analog Devices declarations.
