LTC2265CUJ-14 - 14-Bit 65Msps Dual ADC | Analog Devices
부품 번호: LTC2265CUJ-14 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $52.88 | $52.88 |
| 10 | $48.5 | $485.00 |
| 100 | $43.95 | $4,395.00 |
| 500 | $39.2 | $19,600.00 |
| 1,000 | $35.5 | $35,500.00 |
LTC2265CUJ-14 개요
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts continuous analog voltage signals into discrete digital codes. Pipelined ADCs use a multi-stage architecture that delivers high sample rates (>10 Msps) at moderate resolution (10-16 bits) with low power consumption, making them ideal for digitizing high-frequency, wide-dynamic-range signals in communications, instrumentation, and imaging applications.
Key features of the LTC2265CUJ-14 include an 800 MHz full-power sample-and-hold bandwidth, shutdown and nap modes for power saving, and a serial SPI port for configuration. Its pin-compatible 14-bit/12-bit family (LTC2265-14, LTC2264-14, LTC2263-14) and 40-pin 6x6 mm QFN footprint enable drop-in scalability across sample rates and resolutions.
The device operates from a 1.8 V analog/digital supply (VDD = OVDD = 1.8 V), drawing low power suitable for portable and multi-channel systems. The differential input architecture and LVDS outputs minimize digital noise coupling, supporting direct connection to FPGAs and DSPs in high-speed signal chains.
Typical applications include communications receivers, basestation digitizers, software-defined radio (SDR), portable instrumentation, and multi-channel data acquisition systems. The wide input bandwidth also supports IF (intermediate frequency) sampling in radar and medical imaging front ends.
When designing with the LTC2265CUJ-14, use a low-jitter clock at ENC+/ENC- and place input anti-aliasing capacitors close to the analog inputs. The LVDS output format requires 100-ohm differential termination at the receiver. The SPI port enables dynamic mode selection between 1-lane and 2-lane output and shutdown control for power sequencing.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet, giving engineers a single reference for selection, sourcing, and PCB layout planning.
드롭인 대체품: LTC2265CUJ-14 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LTC2265CUJ-14 (동일 폼 팩터 및 풋프린트) — 차이점: Sample Rate, Operating Temperature Range, Number of Channels, Input Type, RoHS Status.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LTC2265CUJ-12
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$22.4 / 개
데이터시트 보기 →LTC2265IUJ-14
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$35.1 / 개
데이터시트 보기 →LTC2264CUJ-14
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$27.5 / 개
데이터시트 보기 →LTC2263CUJ-14
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$18.24 / 개
데이터시트 보기 →LTC2264IUJ-14
✅ 드롭인✓ 재고 있음
$38.95 / 개
데이터시트 보기 →LTC2263IUJ-14
✅ 드롭인✓ 재고 있음
$18.25 / 개
데이터시트 보기 →LTC2260CUJ-14
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$19.4 / 개
데이터시트 보기 →LTC2265CUJ-14 최대 정격 & 전기적 특성
| 분해능 | 14 bit |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 65 Msps |
| Architecture | Pipelined |
| Input Type | Differential |
| INL (Integral Non-Linearity) | ±1 LSB (typical) |
| DNL (Differential Non-Linearity) | ±0.3 LSB (typical) |
| Missing Codes | No missing codes over temperature |
| Transition Noise | 1.2 LSB RMS |
| Full-Power Input Bandwidth | 800 MHz |
| Digital Output Interface | Serial LVDS (1-lane or 2-lane) |
| Supply Voltage (VDD = OVDD) | 1.8 V |
| Configuration Interface | Serial SPI port |
| Power-Saving Modes | Shutdown and Nap modes |
| 패키지 | 40-QFN (6x6 mm) |
| 동작 온도 범위 | 0C to +70C (commercial) |
| 실장 유형 | Surface Mount |
| Lead-Free / RoHS | Yes (#PBF suffix indicates lead-free) |
LTC2265CUJ-14 핀 구성
| 핀 1 | GND — Ground (exposed pad also serves as primary ground) |
| 핀 2 | VA+ — Channel A positive analog input |
| 핀 3 | VA- — Channel A negative analog input |
| 핀 4 | VDD — 1.8 V analog supply |
| 핀 5 | GND — Ground |
| 핀 6 | VB- — Channel B negative analog input |
| 핀 7 | VB+ — Channel B positive analog input |
| 핀 8 | GND — Ground |
| 핀 9 | VREF — Voltage reference bypass |
| 핀 10 | SENSE — Reference mode selection |
| 핀 11 | GND — Ground |
| 핀 12 | OVDD — 1.8 V output supply (LVDS) |
| 핀 13 | OGND — Output ground (LVDS return) |
| 핀 14 | SDO — Serial LVDS data output |
| 핀 15 | SDOB — Serial LVDS data output (channel B) |
| 핀 16 | FR — Frame output (LVDS) |
| 핀 17 | DCO — Data clock output (LVDS) |
| 핀 18 | OGND — Output ground (LVDS return) |
| 핀 19 | OVDD — 1.8 V output supply (LVDS) |
| 핀 20 | CS — SPI chip select (active low) |
| 핀 21 | SCK — SPI serial clock |
| 핀 22 | SDI — SPI serial data input |
| 핀 23 | SDO_SPI — SPI serial data output |
| 핀 24 | OGND — Output ground (LVDS return) |
| 핀 25 | OVDD — 1.8 V output supply (LVDS) |
| 핀 26 | GND — Ground |
| 핀 27 | ENC- — Negative encode clock input |
| 핀 28 | ENC+ — Positive encode clock input |
| 핀 29 | GND — Ground |
| 핀 30 | VDD — 1.8 V analog supply |
| 핀 31 | CM — Common-mode voltage bypass |
| 핀 32 | GND — Ground |
| 핀 33 | VA+ — Channel A positive analog input (alternate bond) |
| 핀 34 | VA- — Channel A negative analog input (alternate bond) |
| 핀 35 | GND — Ground |
| 핀 36 | VDD — 1.8 V analog supply |
| 핀 37 | VB- — Channel B negative analog input (alternate bond) |
| 핀 38 | VB+ — Channel B positive analog input (alternate bond) |
| 핀 39 | GND — Ground |
| 핀 40 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
LTC2265CUJ-14 적합 용도: 6 애플리케이션s: Communications Receiver Digitizer, Software-Defined Radio (SDR) Front End, Multi-Channel Data Acquisition System, Medical Ultrasound Imaging Receiver, Portable Instrumentation and Test Equipment, Radar and Lidar Signal Processing.
Communications Receiver Digitizer
The LTC2265CUJ-14's dual-channel simultaneous sampling and 800 MHz input bandwidth make it ideal for digitizing the I and Q baseband outputs of a communications receiver at IF or directly at baseband. With 14-bit resolution and 65 Msps per channel, the ADC preserves signal dynamic range for demodulation while the serial LVDS output minimizes the number of board traces to the FPGA, reducing EMI and simplifying PCB layout. Both channels share the same ENC+/ENC- clock input, guaranteeing phase-coherent sampling required for I/Q demodulation. The 1.8 V supply integrates directly with FPGA LVDS I/O banks, eliminating level translation. Pin-compatible family members (LTC2264 at 40 Msps, LTC2266 at higher rates) allow the same PCB to support multiple receiver bandwidths.
추천
Software-Defined Radio (SDR) Front End
The LTC2265CUJ-14 serves as the dual ADC in SDR platforms where two independent RF channels must be digitized simultaneously for spectrum monitoring, signal intelligence, or multi-band reception. Its 14-bit resolution provides approximately 76 dB of spurious-free dynamic range when sampling wide-bandwidth signals at 65 Msps, while the LVDS digital interface supports direct connection to Xilinx or Altera FPGAs. The 800 MHz full-power bandwidth allows sampling at IF frequencies above 100 MHz without significant SNR loss, enabling direct-IF sampling architectures. The SPI configuration port enables dynamic switching between 1-lane and 2-lane LVDS modes for trade-offs between trace count and per-channel throughput, and shutdown/nap modes support time-multiplexed multi-channel SDR systems.
추천
Multi-Channel Data Acquisition System
In multi-channel data acquisition systems, the LTC2265CUJ-14's dual-channel architecture allows two synchronized measurements per IC, reducing board area and BOM cost compared with two single-channel ADCs. With ±1 LSB INL and no missing codes over temperature, it delivers DC accuracy needed for industrial instrumentation and test equipment, while 65 Msps captures fast transient signals in vibration analysis, sonar arrays, and ultrasonic imaging. The serial LVDS output reduces pin count and allows multiple ADCs to be synchronized by sharing the same ENC+/ENC- clock, supporting scalable 4-, 8-, or 16-channel systems. The SPI configuration port enables per-channel gain and offset calibration via daisy-chain configuration across multiple devices.
추천
Medical Ultrasound Imaging Receiver
The LTC2265CUJ-14's 14-bit resolution, dual-channel simultaneous sampling, and 65 Msps sample rate fit portable and mid-range ultrasound beamformer receivers where each transducer channel requires a dedicated ADC. The 800 MHz input bandwidth captures harmonic content from broadband ultrasound transducers, and the LVDS digital output streams directly to a beamformer FPGA or ASIC with minimal board routing. The 1.8 V supply minimizes power consumption in cart-based ultrasound systems, while the shutdown and nap modes allow time-gated beamforming that reduces average power across the imaging array. Pin-compatibility with the LTC2263CUJ-14 (25 Msps) and LTC2264CUJ-14 (40 Msps) lets designers reuse PCB layouts across product tiers.
추천
Portable Instrumentation and Test Equipment
Battery-powered oscilloscopes, spectrum analyzers, and arbitrary waveform digitizers benefit from the LTC2265CUJ-14's low power consumption at 65 Msps dual-channel operation. The 1.8 V analog and digital supply rails share a common LDO output, simplifying power-tree design in portable form factors. The 14-bit resolution and 1.2 LSB RMS transition noise deliver sufficient dynamic range for general-purpose bench instruments, while the serial LVDS output reduces the connector pin count for modular digitizer cards. The SPI port enables remote recalibration and mode switching, supporting field-programmable test configurations without firmware changes to the host processor.
추천
Radar and Lidar Signal Processing
In phased-array radar and lidar receiver systems, the LTC2265CUJ-14's dual-channel simultaneous sampling supports I/Q demodulation of each antenna element with phase coherence guaranteed by a shared clock. The 800 MHz full-power bandwidth allows direct IF sampling at L-band and S-band radar frequencies, eliminating an analog downconversion stage. With 14-bit resolution and ±1 LSB INL, the ADC provides the dynamic range needed for detecting small targets in the presence of large clutter returns. The LVDS output streams directly to FPGA-based digital beamforming networks, where the LTC2265CUJ-14's 1.8 V supply integrates with standard FPGA LVDS I/O rails without level translation. Pin-compatible family members enable radar designs that scale across bandwidth tiers.
추천
추천 제품 요약
엔지니어링 참조 데이터: LTC2265CUJ-14 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LTC2265CUJ-12 | LTC2265IUJ-14 | LTC2264CUJ-14 | LTC2264IUJ-14 | LTC2263CUJ-14 | LTC2260CUJ-14 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | 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 | 40-QFN (6x6) - same |
| Resolution | 14 bit | 12 bit | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sample Rate | 65 Msps | 65 Msps | 65 Msps | 40 Msps | 40 Msps | 25 Msps | 105 Msps |
| Number of Channels | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) | 2 (simultaneous sampling) |
| Digital Output | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) | Serial LVDS (1-lane / 2-lane) |
| Supply Voltage | 1.8 V (VDD = OVDD) | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | 0C to +70C |
주요 차별점
- Dual-channel simultaneous sampling at 65 Msps in 40-QFN (6x6) (vs LTC2257 family)
- Pin-compatible 14-bit / 12-bit resolution variants (vs LTC2265CUJ-12)
- Pin-compatible sample-rate scaling 25 / 40 / 65 Msps (vs LTC2264CUJ-14 / LTC2263CUJ-14)
- Industrial temperature grade available in same package (vs LTC2265IUJ-14)
설계 노트
Estimated: The 40-QFN (6x6 mm) package has an exposed thermal pad that MUST be soldered to a ground pour of at least the same footprint to meet specified AC and DC performance. Place the input anti-aliasing capacitors (typically 10 pF to 33 pF NPO/COG) within 2 mm of the VA+/VA- and VB+/VB- differential input pairs to limit common-mode coupling and maximize SNR at high input frequencies. Route the LVDS output pairs (SDO/SDOB, FR, DCO) as 100-ohm differential microstrip with matched length (±150 mil) to the FPGA receiver pins. Use a separate analog and digital ground split connected at a single point under the exposed pad.
Estimated: For optimum SNR at 65 Msps, use a low-jitter (<200 fs RMS) clock source such as the LTC6946 or ADF4350 driving the ENC+/ENC- differential encode input. ADC aperture jitter degrades SNR by approximately 20*log10(2*pi*fin*tjitter); at fin = 200 MHz and tjitter = 200 fs, the SNR penalty is approximately 3 dB. Terminate ENC+ and ENC- with 100 ohms differential close to the ADC pins to damp reflections. If using a single-ended clock, AC-couple through a balun or transformer to drive ENC+ while AC-grounding ENC- through a 4.7 nF capacitor to preserve common-mode balance.
Do not exceed the absolute maximum analog input voltage range (per datasheet, VDD + 0.3 V); driving the inputs beyond this can permanently damage the ADC. The SENSE pin (pin 10) MUST be tied to VDD for internal reference mode or to GND for external reference mode; leaving it floating is invalid. For SPI programming, the CS pin (active low) must return high between SPI transactions - holding CS low continuously can corrupt the configuration state. When using shutdown or nap modes, allow at least 100 us wake-up time before resuming sampling for the internal bias circuits to settle to specified linearity.
규정 준수 정보
Lead-free per #PBF suffix on Analog Devices part number. RoHS and REACH compliance per distributor product page. AEC-Q100 qualification not applicable - this is a commercial/industrial dual ADC, not an automotive-qualified part.
