LTC2144IUP-14 - 14-Bit, 105Msps Dual ADC | Analog Devices
N.º da peça: LTC2144IUP-14 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $76.5 | $76,50 |
| 10 | $71.8 | $718,00 |
| 100 | $68.31 | $6.831,00 |
| 500 | $64.2 | $32.100,00 |
| 1.000 | $60.15 | $60.150,00 |
LTC2144IUP-14 Visão geral
What is a dual pipelined ADC? A dual pipelined ADC is an analog-to-digital converter that integrates two independent sample-and-hold front-ends followed by multi-stage switched-capacitor pipeline stages. The architecture enables two channels to be digitized simultaneously, which is critical for applications such as MIMO wireless transceivers, diversity radar, and quadrature (I/Q) signal processing where phase coherence between channels determines system performance.
Key features include 73.4 dB SNR and 90 dB SFDR at 70 MHz input, an internal transparent dither circuit that improves SFDR at low input frequencies, and a serial SPI port for mode configuration. The LTC2144-14 family supports CMOS, DDR CMOS, or DDR LVDS output modes, allowing flexible interface to FPGAs and ASICs. A built-in clock duty-cycle stabilizer relaxes PCB clock-routing constraints.
The LTC2144IUP-14 is engineered for high-channel-count multi-board systems: a multi-lane serial output mode produces a single-lane serial data stream per channel, reducing FPGA pin count. Internal bandgap reference and proprietary pipeline design eliminate the need for external reference decoupling in most applications, reducing BOM cost. Pin compatibility with the 12-bit LTC2144-12 and 14-bit LTC2143-14 (80 MSPS) variants provides an easy resolution/sample-rate upgrade path within the same QFN-64 footprint.
Typical applications include communications basestations (MIMO LTE/WCDMA diversity receivers), handheld portable instrumentation, medical imaging (ultrasound beamforming front-ends), and defense electronics such as phased-array radar digitizers. The industrial temperature range (-40C to +85C) supports outdoor and uncontrolled-environment deployments.
When designing with this device, provide a clean low-noise ground plane directly under the exposed pad, route the 105 MHz encode clock as a 50 ohm controlled-impedance trace, and bypass each analog supply pin with a 0.1 uF X7R ceramic capacitor within 3 mm of the pin. The IUP suffix denotes the industrial-grade (-40C to +85C) package.
This page synthesizes distributor pricing, drop-in alternatives, and practical layout guidance not found in the bare datasheet, with cross-references to companion Linear Technology ADC families.
Alternativas drop-in para LTC2144IUP-14 — 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 LTC2144IUP-14 (mesmo formato e footprint) — diferindo em Package, Digital Output Interface, Number of Channels, Resolution, Sample Rate.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LTC2144CUP-14#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2143IUP-14
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2145IUP-14
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2144IUP-14#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2142IUP-14
✅ Drop-In✓ Em estoque
$34.71 / unidade
Ver ficha técnica →LTC2144IUP-14 Classificações máximas e características elétricas
| Resolução | 14 bits |
| Sample Rate | 105 MSPS |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Architecture | Pipelined |
| Input Type | Differential |
| Supply Voltage (Analog) | 1.8 V |
| Supply Voltage (Digital/Output) | 1.8 V to 2.5 V |
| Power Dissipation | 312 mW (typ, both channels) |
| SNR at 70 MHz input | 73.4 dB |
| SFDR at 70 MHz input | 90 dB |
| Output Interface | CMOS / DDR CMOS / DDR LVDS |
| Input Range | 1 Vp-p to 2 Vp-p differential |
| Encapsulamento | 64-QFN (9x9 mm) with exposed pad |
| Temperatura de operação | -40C to +85C (industrial) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (PBF suffix) |
| Nível MSL | 1 |
| Configuration Port | SPI serial |
Guia de Configuração de Pinos do LTC2144IUP-14 64-qfn (9x9 mm) with exposed pad
Configuração de pinos para LTC2144IUP-14 (pacote 64-qfn (9x9 mm) with exposed pad). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para LTC2144IUP-14.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LTC2144IUP-14 é adequado para 6 aplicaçãos: MIMO Wireless Basestation Receivers, Phased-Array Radar Digitizers, Medical Ultrasound Beamforming, Handheld Portable Test Instrumentation, Software Defined Radio (SDR) Receivers, Industrial Multi-Channel Data Acquisition.
MIMO Wireless Basestation Receivers
The LTC2144IUP-14's two simultaneous-sampling 14-bit channels at 105 MSPS are ideal for MIMO LTE/WCDMA diversity receivers. The dual pipelined architecture captures both antenna paths in lockstep, preserving the phase coherence required for spatial multiplexing decoding. With 73.4 dB SNR and 90 dB SFDR, the device digitizes wide-bandwidth multi-carrier signals without aliasing, and its CMOS/LVDS output flexibility interfaces directly to common FPGAs (Xilinx, Altera) used in basestation baseband ASICs.
Recomendado
Phased-Array Radar Digitizers
The LTC2144IUP-14's two-channel synchronous sampling makes it a strong fit for phased-array radar sub-array digitizers. Each ADC channel captures I/Q data from a single antenna element; multiple LTC2144IUP-14s tile across the array, with channel-to-channel latency matched by the shared encode clock. The 105 MSPS rate supports L-band radar bandwidths, while the 64-QFN 9x9 mm package and 312 mW power ease thermal management in densely populated array boards with hundreds of channels.
Recomendado
Medical Ultrasound Beamforming
The LTC2144IUP-14 is well-suited to medical ultrasound front-end beamforming where two channels digitize the I/Q return from adjacent transducer elements. Its 73.4 dB SNR enables high-contrast harmonic imaging at low acoustic power, while the 105 MSPS rate handles 40 MHz probe bandwidth. The dual pipelined architecture reduces channel-to-channel skew to picoseconds, critical for accurate beam steering and image reconstruction. The exposed-pad QFN-64 keeps the per-channel board area minimal.
Recomendado
Handheld Portable Test Instrumentation
The LTC2144IUP-14's 312 mW total power and 1.8 V supply make it suitable for battery-powered oscilloscopes and spectrum analyzers. Two channels enable dual-trace capture without an external channel-switching ASIC, reducing BOM cost. The LVDS output mode provides EMI-robust data transfer to the display FPGA over flex cables. Industrial temperature grade and exposed-pad QFN64 simplify rugged enclosure thermal design.
Recomendado
Software Defined Radio (SDR) Receivers
The LTC2144IUP-14 digitizes I/Q baseband or IF signals directly in software-defined radio platforms, with two channels supporting full I/Q capture from a single demodulator. The 105 MSPS rate handles wide-bandwidth waveforms including Wi-Fi 6E and 5G NR FR1, while the 14-bit resolution preserves dynamic range for weak signals adjacent to strong blockers. SPI programmability allows runtime reconfiguration between protocols, supporting multi-mode tactical radios.
Recomendado
Industrial Multi-Channel Data Acquisition
The LTC2144IUP-14's dual simultaneous sampling at 105 MSPS serves industrial condition-monitoring and vibration analysis systems. Two ADC channels per chip enable simultaneous capture of multiple accelerometer signals, with the synchronous timing essential for phase-coherent modal analysis. The 1.8 V analog supply, exposed-pad QFN package, and -40C to +85C industrial temperature range support deployment in factory-floor enclosures with wide thermal variation.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC2144IUP-14 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LTC2144CUP-14#PBF | LTC2143IUP-14 | LTC2145IUP-14 | LTC2144IUP-14#PBF | LTC2142IUP-14 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Resolution | 14-bit | 14-bit | 14-bit | 14-bit | 14-bit | 14-bit |
| Sample Rate | 105 MSPS | 105 MSPS | 80 MSPS (-24%) | 125 MSPS (+19%) | 105 MSPS | 65 MSPS (-38%) |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) | 2 (dual) |
| Power Dissipation | 312 mW | 312 mW | ~235 mW (-25%) | ~390 mW (+25%) | 312 mW | ~170 mW (-46%) |
| Temperature Range | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Output Interface | CMOS/DDR CMOS/DDR LVDS | CMOS/DDR CMOS/DDR LVDS | CMOS/DDR CMOS/DDR LVDS | CMOS/DDR CMOS/DDR LVDS | CMOS/DDR CMOS/DDR LVDS | CMOS/DDR CMOS/DDR LVDS |
| Price (qty 1000) | $60.15 | $58.00 (est.) | $48.00 (est.) | $78.00 (est.) | $60.15 | $40.00 (est.) |
Principais diferenciais
- Highest sample rate in the 64-QFN-9x9 dual-ADC family at 105 MSPS (vs LTC2143IUP-14)
- Industrial -40C to +85C temperature range (vs LTC2144CUP-14#PBF)
- Lower power than higher-speed LTC2145 family (vs LTC2145IUP-14)
Notas de projeto
The LTC2144IUP-14 requires a multilayer PCB with a continuous unbroken ground plane directly beneath the ADC. The exposed thermal pad (pin 65) must be soldered to this ground plane through an array of thermal vias (typically 9-16 vias, 0.3 mm diameter) for rated thermal performance. Per the datasheet 21454314fa, avoid routing digital output traces beneath the analog input pins to prevent digital coupling into the sensitive analog front-end.
Route the 105 MHz encode clock as a 50 ohm controlled-impedance trace, kept as short as possible and isolated from analog inputs by a ground trace on each side. Place the SPI configuration port traces away from the encode clock to avoid setup/hold violations during programming. Bypass each analog supply pin (OVDD, AVDD) with a 0.1 uF X7R ceramic capacitor within 3 mm of the pin, plus a bulk 10 uF tantalum at the regulator output.
Differential analog inputs should be routed as a 100 ohm differential pair with symmetric length matching to within 0.5 mm to preserve the 73.4 dB SNR and 90 dB SFDR ratings. AC-couple the analog inputs through a transformer (e.g., Mini-Circuits ADT1-1WT) or differential driver for best second-harmonic distortion performance. Avoid using the internal common-mode bias when driving single-ended sources - it adds 3 dB to second-harmonic distortion.
Do not exceed the maximum encode clock rate of 105 MSPS for the LTC2144IUP-14. If higher rates are required, migrate to the LTC2145-14 (125 MSPS) which shares the same pinout. Do not float the SPI port pins - tie SCLK, SDI, and CS high through 10 kohm resistors if not used, otherwise the chip may enter an undefined mode and consume higher quiescent current. The OVDD supply must be present before AVDD to prevent latch-up during power sequencing.
Informações de conformidade
RoHS compliant per the PBF suffix on Analog Devices part numbers. The #PBF suffix denotes lead-free (Pb-free) reflow-compatible finish. AEC-Q100 qualification is not applicable as this is a commercial/industrial-grade ADC not marketed for automotive safety-critical applications. Halogen-free status not explicitly stated in the datasheet; set to unknown per Data Authenticity Rules.
