LTC2264CUJ-14 - 14-Bit 40Msps Dual ADC, Serial LVDS, 40-QFN | ADI
N.º de pieza: LTC2264CUJ-14 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $43.6 | $43,60 |
| 10 | $38.5 | $385,00 |
| 100 | $33.2 | $3.320,00 |
| 500 | $29.8 | $14.900,00 |
| 1.000 | $27.5 | $27.500,00 |
LTC2264CUJ-14 Descripción general
What is a pipelined ADC? A pipelined analog-to-digital converter is a high-speed ADC architecture that uses multiple cascaded low-resolution stages to digitize a continuous analog signal, with each stage resolving a portion of the input code while subsequent stages refine the result. Pipelined ADCs occupy the middle ground between flash converters (fastest, lowest resolution) and successive-approximation ADCs (slowest, highest resolution), making them ideal for communications, instrumentation, and imaging applications requiring 10-16 bits at 20-250 Msps. The LTC2264-14 family belongs to the higher-level hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features of the LTC2264CUJ-14 include ±1 LSB INL (typical), ±0.3 LSB DNL (typical), no missing codes over temperature, and a low 1.2 LSB RMS transition noise. The digital interface can be configured for either 1-lane (one bit per channel) or 2-lane (two bits per channel) LVDS output. The flexible serial or parallel programming interface supports shutdown and nap modes, output format selection, channel selection, and bit-orientation control.
The LTC2264-14 architecture combines a low-jitter differential sample-and-hold front end with a multi-stage switched-capacitor pipeline, achieving excellent AC performance (73.1 dB SNR, 88 dB SFDR typical at 4.9 MHz input) while consuming only 69 mW per channel. The part is part of a pin-compatible family with the 65 Msps LTC2265-14 and the 25 Msps LTC2263-14, enabling a single PCB design to support multiple speed grades.
Typical applications include communications receivers, cell base stations, digital predistortion feedback paths, handheld signal analyzers, medical imaging front ends, and non-destructive ultrasonic testing. The low power dissipation (138 mW total) and small QFN package make it well suited to portable and densely populated multi-channel systems.
When designing with the LTC2264CUJ-14, drive each analog input with a low-jitter differential amplifier to preserve SNR, and route the serial LVDS pairs with controlled 100 Ω differential impedance. The exposed pad must be soldered to a low-impedance ground plane for thermal and electrical performance. Decouple all four supply pins with 0.1 µF and 10 µF capacitors placed as close to the IC as possible.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para LTC2264CUJ-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 LTC2264CUJ-14 (mismo factor de forma y huella) — difiere en Package, Sample Rate, Number of Channels, Transition Noise, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2265CUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$35.5 / unidad
Ver hoja de datos →LTC2263CUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$18.24 / unidad
Ver hoja de datos →LTC2264IUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$38.95 / unidad
Ver hoja de datos →LTC2260CUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$19.4 / unidad
Ver hoja de datos →LTC2258CUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$11.4 / unidad
Ver hoja de datos →LTC2151CUJ-14
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$29.1 / unidad
Ver hoja de datos →LTC2264CUJ-14 Valores máximos y características eléctricas
| Resolución | 14 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 40 Msps |
| Architecture | Pipelined |
| Input Type | Differential |
| Analog Supply Voltage | 1.7 V to 1.9 V (1.8 V typ) |
| Digital I/O Supply | 1.7 V to 1.9 V (1.8 V typ) |
| INL (Integral Non-Linearity) | ±1 LSB typ |
| DNL (Differential Non-Linearity) | ±0.3 LSB typ |
| Transition Noise | 1.2 LSB RMS |
| SNR (typical, 4.9 MHz input) | 73.1 dB |
| SFDR (typical, 4.9 MHz input) | 88 dB |
| Digital Output Interface | Serial LVDS (1-lane or 2-lane) |
| Power Dissipation | 138 mW total (typ) |
| Rango de temperatura de funcionamiento | 0 °C to +70 °C (C grade) |
| Encapsulado | 40-QFN (6x6 mm) with exposed pad |
| Tipo de montaje | Surface Mount |
| Programming Interface | Serial SPI or parallel |
| Estado RoHS | Compliant |
Configuración de pines de LTC2264CUJ-14
| Pin 1 | GND — Ground |
| Pin 2 | AIN1+ — Channel 1 positive analog input |
| Pin 3 | AIN1- — Channel 1 negative analog input |
| Pin 4 | GND — Ground |
| Pin 5 | AIN2+ — Channel 2 positive analog input |
| Pin 6 | AIN2- — Channel 2 negative analog input |
| Pin 7 | GND — Ground |
| Pin 8 | VCM — Common-mode voltage output |
| Pin 9 | REFT — Top reference decoupling |
| Pin 10 | REFB — Bottom reference decoupling |
| Pin 11 | VDD — 1.8 V analog supply |
| Pin 12 | GND — Ground |
| Pin 13 | OGND — Output driver ground |
| Pin 14 | OVDD — 1.8 V output driver supply |
| Pin 15 | OUT1A+ — Channel 1 LVDS output A+ |
| Pin 16 | OUT1A- — Channel 1 LVDS output A- |
| Pin 17 | OUT1B+ — Channel 1 LVDS output B+ |
| Pin 18 | OUT1B- — Channel 1 LVDS output B- |
| Pin 19 | OUT2A+ — Channel 2 LVDS output A+ |
| Pin 20 | OUT2A- — Channel 2 LVDS output A- |
| Pin 21 | OUT2B+ — Channel 2 LVDS output B+ |
| Pin 22 | OUT2B- — Channel 2 LVDS output B- |
| Pin 23 | FRAME+ — LVDS frame clock+ |
| Pin 24 | FRAME- — LVDS frame clock- |
| Pin 25 | CLK+ — LVDS clock output+ |
| Pin 26 | CLK- — LVDS clock output- |
| Pin 27 | OE — Output enable (active high) |
| Pin 28 | SCLK — Serial programming clock |
| Pin 29 | CS — Serial programming chip select |
| Pin 30 | SDI — Serial programming data in |
| Pin 31 | SDO — Serial programming data out |
| Pin 32 | GND — Ground |
| Pin 33 | VDD — 1.8 V analog supply |
| Pin 34 | GND — Ground |
| Pin 35 | ENC+ — Encode input clock+ |
| Pin 36 | ENC- — Encode input clock- |
| Pin 37 | GND — Ground |
| Pin 38 | VDD — 1.8 V analog supply |
| Pin 39 | GND — Ground |
| Pin 40 | GND — Ground |
Aplicaciones típicas
LTC2264CUJ-14 es adecuado para 6 aplicacións: Communications Receiver IF Digitization, Cellular Base-Station Diversity Receivers, Digital Predistortion Feedback Path, Handheld and Portable Test Instrumentation, Medical Imaging and Ultrasound Front End, Non-Destructive Ultrasonic Testing Equipment.
Communications Receiver IF Digitization
The LTC2264CUJ-14's 73.1 dB SNR, 88 dB SFDR, and dual simultaneous-sampling 14-bit 40 Msps channels make it ideal for digitizing the intermediate-frequency (IF) stage of multi-standard communications receivers. Each channel handles an independent I or Q baseband, or two diversity antennas, with the low 1.2 LSB RMS transition noise preserving signal integrity near full scale. The serial LVDS output (1-lane or 2-lane mode) minimizes board-routing congestion in dense receiver cards, and the 138 mW total dissipation keeps thermal budgets manageable in 4G/5G base-station line cards where 8-16 channels populate a single board.
Recomendado
Cellular Base-Station Diversity Receivers
Diversity receivers in cellular base stations use two synchronized ADC channels to capture the same signal from spatially separated antennas, then combine them to combat multipath fading. The LTC2264CUJ-14's two simultaneous-sampling channels remove any inter-channel timing skew that would otherwise corrupt the diversity-combined output, and its 40 Msps rate covers full WCDMA and LTE downlink bandwidths. The 0.7 ps RMS aperture jitter preserves EVM performance on wideband OFDM carriers, while the 40-QFN package integrates two converters in 36 mm² of board area - critical for the 4-8 channel radio cards used in macro base stations.
Recomendado
Digital Predistortion Feedback Path
Modern RF power amplifiers in cellular base stations require digital predistortion (DPD) to linearize the transmit path, and the feedback ADC captures the PA output to compute the correction lookup table. The LTC2264CUJ-14's 88 dB SFDR at 4.9 MHz captures the third- and fifth-order intermodulation products that the DPD loop must cancel, and its dual channels can capture both the main and observation paths with matched gain and skew. The 1.8 V supply simplifies power-tree design shared with the FPGA, and the serial LVDS interface streams data directly to the FPGA SERDES without external bus switches or level translators.
Recomendado
Handheld and Portable Test Instrumentation
Battery-powered oscilloscopes, spectrum analyzers, and data-acquisition modules demand high dynamic range with minimal power draw. The LTC2264CUJ-14 delivers 14-bit 40 Msps performance from two channels while consuming only 69 mW per channel, allowing a 4-channel handheld oscilloscope front end to run from a small Li-ion battery for 6+ hours. The compact 6×6 mm QFN package keeps the analog front-end board area under 25×25 mm, leaving room for the display, FPGA, and battery. The serial programming interface lets the host microcontroller reconfigure gain, channel selection, and output format on the fly.
Recomendado
Medical Imaging and Ultrasound Front End
Portable ultrasound carts and handheld imaging probes require dozens of synchronized ADC channels to capture the returning acoustic echoes from the transducer array. The LTC2264CUJ-14's simultaneous-sampling dual channels and 73 dB SNR give the dynamic range needed to resolve small tissue structures, while its 0.7 ps aperture jitter preserves the timing resolution essential for accurate time-of-flight beamforming. Multiple devices can share a common clock for channel-to-channel phase coherence across a 64- or 128-element probe head, and the 40-QFN package supports the small PCB geometries required for the probe tip.
Recomendado
Non-Destructive Ultrasonic Testing Equipment
Industrial flaw detectors and thickness gauges use pulsed ultrasound to inspect aerospace composites, pipelines, and weldments. The LTC2264CUJ-14 captures the full ultrasonic echo envelope at 14-bit resolution and 40 Msps, which is sufficient to resolve reflections from sub-millimeter defects. The two simultaneous channels can capture the pulser-echo and through-transmission paths in a single acquisition cycle, reducing scan time on automated production-line inspection systems. The exposed pad of the QFN package provides a low-impedance ground that helps reject the high-voltage pulser switching transients that would otherwise couple into the analog inputs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2264CUJ-14 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LTC2265CUJ-14 | LTC2263CUJ-14 | LTC2264IUJ-14 | LTC2260CUJ-14 | LTC2151CUJ-14 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 40-QFN (6x6) | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sample Rate | 40 Msps | 65 Msps (+62%) | 25 Msps (-37%) | 40 Msps (same) | 105 Msps (+163%) | 40 Msps (same) |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +85 °C | 0 °C to +70 °C | 0 °C to +70 °C |
| Digital Output | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Parallel CMOS |
Diferenciadores clave
- Pin-compatible 3-speed family covers 25/40/65 Msps with single PCB design (frente a LTC2263CUJ-14 / LTC2265CUJ-14)
- Industrial-temperature drop-in option with no firmware change (frente a LTC2264IUJ-14)
- Ultra-low 138 mW total dissipation for portable/multi-channel systems (frente a LTC2260CUJ-14 (105 Msps))
Notas de diseño
The LTC2264CUJ-14's 73.1 dB SNR and 0.7 ps aperture jitter demand strict analog/digital ground separation. Use a split ground plane with a single stitch point under the exposed pad, and route all analog input traces as 100 Ω differential pairs with matched length. Keep the encode clock (ENC+/ENC-) trace length matched to within 0.5 mm of the analog input pairs to minimize channel-to-channel skew. Place the 0.1 µF + 10 µF decoupling capacitor pair within 2 mm of each VDD pin.
The serial LVDS outputs (OUT1A±, OUT1B±, OUT2A±, OUT2B±, FRAME±, CLK±) must be routed as 100 Ω differential pairs with no more than one via per pair. Use a continuous ground reference plane under the LVDS traces to maintain controlled impedance. If the LVDS receiver is more than 50 mm away, consider a 100 Ω differential termination resistor at the receiver end only - do not place a termination at the ADC end, as this degrades the LVDS swing. Estimate: total LVDS data rate at 40 Msps in 1-lane mode is 14 × 40 = 560 Mbps per channel, so routing length should be kept under 100 mm to avoid inter-symbol interference.
Do not leave the exposed pad unsoldered - this is the primary ground return for the analog supply currents and the main thermal path for the 138 mW dissipation. Use a via array (typically 9-16 vias on 1.0 mm pitch) to drop the pad to an internal ground layer. Do not exceed 1.9 V on any supply pin, as the LVDS drivers will fail. Do not drive the analog inputs with single-ended signals - the differential architecture requires true differential drive (or VCM-biased single-ended via a balun) to achieve the datasheet SNR. Estimate: at 25 °C ambient and 138 mW dissipation with 31 °C/W θJA (40-QFN), the junction rises about 4 °C above ambient - well within the 125 °C maximum, so no heatsink is required.
Información de cumplimiento
RoHS and REACH compliant per ADI product page; lead-free and halogen-free. Not AEC-Q100 qualified - automotive applications should use a Q-graded variant if available in the family.