LTC2283CUP - Dual 12-Bit 125Msps 3V ADC | Analog Devices
料号： LTC2283CUP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $67.16 | $67.16 |
| 10 | $60.45 | $604.50 |
| 100 | $50.35 | $5,035.00 |
| 500 | $43.65 | $21,825.00 |
| 1,000 | $38.95 | $38,950.00 |
LTC2283CUP 概述
What is a pipeline ADC? A pipeline analog-to-digital converter (ADC) is a high-speed successive architecture that processes analog input samples through a cascade of low-resolution stages, each handling one bit (or a few bits) of conversion before passing the residue to the next stage. Pipeline ADCs balance high sampling rates (tens to hundreds of Msps) with moderate resolution (10-16 bits), making them the dominant architecture for communications baseband, IF digitization, imaging, and test equipment. They sit within the ADC taxonomy below successive-approximation (SAR) ADCs in resolution but above flash ADCs in speed/resolution trade-off. Pipeline ADCs require careful front-end driver, reference, and clock design to achieve their rated AC performance.
Key features include a flexible input range (1 Vp-p to 2 Vp-p differential), internal or external voltage reference operation, and a low-jitter LVDS or CMOS-compatible output interface (selectable per device variant). The 64-lead QFN package offers excellent thermal performance and is required for the exposed thermal pad that connects to the internal ground plane. The device supports both internal and external clocking with sub-picosecond aperture jitter for IF-sampling applications.
The LTC2283's dual-channel architecture, low power dissipation, and high SFDR make it well suited to multi-antenna wireless receivers, medical ultrasound beamformers, and portable test instruments. Its CMOS-compatible digital interface simplifies connection to FPGAs and DSPs without requiring level shifters.
Applications include cellular basestation diversity receivers, cable head-end downstream digitizers, ultrasound imaging front ends, and spectral analysis instrumentation. The wide input bandwidth supports direct IF sampling in the 70 MHz to 140 MHz range commonly used in software-defined radio designs.
Designers should pay attention to input common-mode voltage and the recommended anti-alias filter topology, which directly affects achievable SNR. A differential input driving transformer or fully differential amplifier maximizes second-harmonic distortion performance. A low-noise LDO such as the LT1763 should power the analog AVDD rail, while the OVDD rail may be driven by a digital supply if output level translation is acceptable.
This page synthesizes distributor pricing, drop-in alternatives from the same LTC228x and LTC226x families, and practical PCB layout/design notes not consolidated on a single manufacturer page.
直接替换替代料： LTC2283CUP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTC2283CUP （相同外形与封装尺寸） ——差异在于 RoHS Status, Resolution, Number of Channels, Package, SFDR.
快速对比工具——选择替代料号进行并排对比：
LTC2282CUP
✅ 直接替换✓ 有现货
$18.5 / 个
查看数据手册 →LTC2280CUP
✅ 直接替换✓ 有现货
$15.85 / 个
查看数据手册 →LTC2283IUP#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC2283CUP#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2283CUP#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2283CUP 最大额定值与电气特性
| 分辨率 | 12 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate | 125 Msps per channel |
| Architecture | Pipelined |
| Analog Supply Voltage (AVDD) | 3 V (2.85 V to 3.4 V) |
| Digital Output Supply (OVDD) | 1.5 V to 3.3 V |
| Input Range | 1 Vp-p to 2 Vp-p differential |
| SNR | 70.1 dB at Nyquist |
| SFDR | 82 dB at Nyquist |
| Power Dissipation | approximately 400 mW per channel |
| Aperture Jitter | sub-picosecond |
| Operating Temperature Range (C-grade) | 0 C to +70 C |
| 封装 | 64-QFN (9x9 mm) with exposed pad |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant (PBF suffix) |
| Reference Type | Internal or external |
| Output Interface | CMOS-compatible (selectable per variant) |
LTC2283CUP 64-qfn (9x9 mm) with exposed pad 引脚配置指南
LTC2283CUP（64-qfn (9x9 mm) with exposed pad 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LTC2283CUP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LTC2283CUP 适用于 7 应用s: Cellular Basestation Diversity Receiver, Medical Ultrasound Beamforming Front End, Portable Test and Measurement Instrumentation, Cable Headend Downstream Digitizer, Software-Defined Radio IF Sampling, Industrial Imaging and Machine Vision, Radar and Lidar Signal Processing.
Cellular Basestation Diversity Receiver
The LTC2283CUP's dual-channel simultaneous sampling at 125 Msps is ideal for cellular basestation diversity receivers that need two coherent IF digitizers in one package. With 70.1 dB SNR and 82 dB SFDR at the Nyquist frequency, the part cleanly digitizes WCDMA, LTE, and 5G NR signals at intermediate frequencies of 70-140 MHz without aliasing artifacts. Power dissipation of approximately 400 mW per channel keeps the receiver within typical basestation thermal budgets. Designers typically place the LTC2283CUP downstream of an RF front-end SAW filter and a differential IF driver such as the LT6600 or AD8352, then feed the CMOS output bus directly into an FPGA baseband processor. The 64-QFN exposed pad provides the thermal dissipation required for continuous dual-channel operation at full sample rate.
推荐
Medical Ultrasound Beamforming Front End
The LTC2283CUP is widely used in medical ultrasound beamformer channels where multiple synchronized ADCs sample echo returns at 30-65 MHz IF. Its dual-channel architecture halves board area and power compared to two single-channel ADCs, critical for 64-channel and 128-channel probe heads. The 82 dB SFDR ensures that subtle tissue-echo amplitude variations are not masked by ADC distortion, supporting diagnostic image quality. Low power dissipation (approximately 400 mW per channel) helps manage probe thermal budgets. Designers commonly run the LTC2283CUP at 40-80 Msps in beamformer applications and follow it with a DSP or FPGA for beamforming math. The exposed-pad 64-QFN package allows tight PCB layout on multi-channel boards where each ADC must be physically adjacent to its channel input.
推荐
Portable Test and Measurement Instrumentation
The LTC2283CUP serves as the front-end digitizer in portable spectrum analyzers, oscilloscopes, and software-defined radio instruments where dual-channel acquisition and low power are equally important. The 12-bit/125 Msps combination captures signals up to 62.5 MHz bandwidth (or higher with aliasing-aware undersampling), making the part suitable for benchtop oscilloscope channels below 100 MHz. Power dissipation under 1 W total supports battery-powered designs such as handheld cable signal analyzers. The CMOS output interface connects directly to an FPGA for FFT processing or to a microcontroller for low-rate sampling applications. Designers often pair the LTC2283CUP with a low-jitter clock synthesizer like the LTC6902 to maximize SFDR performance in narrow-band IF digitizer applications.
推荐
Cable Headend Downstream Digitizer
Cable headend equipment digitizes downstream QAM carriers spanning DC to approximately 1 GHz, where the LTC2283CUP serves as the IF digitizer in receivers that downconvert the cable spectrum to an intermediate frequency in the 30-70 MHz range. Its 70.1 dB SNR supports 256-QAM and 1024-QAM demodulation, while the 82 dB SFDR handles burst-mode carrier amplitude variations cleanly. Dual channels allow simultaneous capture of primary and diversity streams. The 3V analog supply operation simplifies power tree design compared to legacy 5V ADCs. Designers typically place the LTC2283CUP after a digital cable tuner and feed the CMOS data into a demodulator ASIC or FPGA. The 64-QFN package suits the dense PCB layouts typical of multi-channel headend line cards.
推荐
Software-Defined Radio IF Sampling
The LTC2283CUP's wide input bandwidth and sub-picosecond aperture jitter make it suitable for IF-sampling software-defined radio receivers. Direct IF sampling at 70-140 MHz avoids the cost and distortion of a second mixer stage, simplifying the receiver chain. The 12-bit resolution and 70.1 dB SNR provide adequate dynamic range for narrow-band signals such as FM, DVB-T, and tactical radio waveforms. Designers commonly pair the LTC2283CUP with a wideband balun at the input and a low-jitter clock source for maximum SFDR. The exposed-pad 64-QFN package enables PCB layouts with tight analog/digital isolation, critical for achieving the rated AC performance. Power dissipation of approximately 400 mW per channel supports portable and manpack SDR form factors.
推荐
Industrial Imaging and Machine Vision
The LTC2283CUP digitizes high-speed line-scan camera outputs and other industrial imaging sensors where 12-bit resolution at 125 Msps captures fine intensity gradients in real time. The dual-channel architecture allows simultaneous capture of two camera channels, doubling throughput per board. The 82 dB SFDR preserves subtle pixel-level intensity variations needed for machine vision defect detection. Designers place the LTC2283CUP close to the image sensor output drivers and use matched-length PCB traces to preserve channel-to-channel timing skew. The CMOS output bus feeds a frame grabber FPGA or ASIC. The commercial 0C to +70C temperature grade suits factory-floor environments with controlled enclosures; the LTC2283IUP variant extends to -40C to +85C for outdoor and vehicle-mounted vision systems.
推荐
Radar and Lidar Signal Processing
The LTC2283CUP captures IF-band radar and lidar return signals where high SFDR and dual-channel coherent sampling are needed for direction-finding and synthetic-aperture processing. The 12-bit resolution and 125 Msps sample rate suit X-band radar IF digitizers and FMCW lidar baseband receivers. Low aperture jitter ensures phase coherence across multiple ADC samples, critical for Doppler processing. Designers typically pair the LTC2283CUP with an LNA, mixer, and bandpass filter chain, followed by an FPGA or DSP that performs the FFT and target-detection algorithms. The exposed-pad 64-QFN package allows dense multi-channel layouts for phased-array radar front ends.
推荐
推荐产品汇总
工程参考数据： LTC2283CUP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LTC2282CUP | LTC2280CUP | LTC2283IUP#PBF | LTC2283CUP#PBF |
|---|---|---|---|---|---|
| Brand | 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 |
| Resolution | 12 bits | 12 bits - same | 12 bits - same | 12 bits - same | 12 bits - same |
| Number of Channels | 2 | 2 - same | 2 - same | 2 - same | 2 - same |
| Sample Rate | 125 Msps | 80 Msps (-36%) | 10 Msps (-92%) | 125 Msps - same | 125 Msps - same |
| Analog Supply Voltage | 3 V | 3 V - same | 3 V - same | 3 V - same | 3 V - same |
| Operating Temperature | 0C to +70C | 0C to +70C - same | 0C to +70C - same | -40C to +85C (industrial) | 0C to +70C - same |
关键差异点
- Dual-channel 125 Msps sampling in a single 64-QFN package （对比 LTC2282CUP)
- Industrial temperature variant available with same die （对比 LTC2283IUP#PBF)
- Pb-free RoHS compliant version available （对比 LTC2283CUP#PBF)
- Wider input bandwidth than lower-speed family members （对比 LTC2280CUP)
设计说明
The 64-QFN exposed pad MUST be soldered to the PCB ground plane with sufficient thermal vias (typically a 4x4 array of 0.3 mm vias under the pad) for proper heat dissipation. Per Analog Devices datasheet 2283fb, failing to solder the exposed pad results in thermal shutdown at moderate ambient temperatures and degraded SNR performance. Use a 4-layer PCB with continuous ground plane on layer 2 directly under the ADC; route digital output traces on layer 3 with ground shielding to minimize digital noise coupling into the analog front end.
Use separate analog and digital supplies for AVDD (3V) and OVDD (1.5V to 3.3V). Each supply pin requires a 10 uF ceramic bypass capacitor placed within 5 mm of the pin, plus 0.1 uF and 0.01 uF high-frequency bypass capacitors. The recommended Analog Devices regulator for the AVDD rail is the LT1763 or LT3021 low-noise LDO. Star-ground the analog and digital grounds at the ADC exposed pad to prevent digital return currents from corrupting the analog reference. Power dissipation at full dual-channel 125 Msps operation is approximately 800 mW total.
Do not operate the LTC2283CUP without an input common-mode voltage; the input range must be biased within the AVDD/2 +-0.5V common-mode window per the datasheet. Driving the inputs differentially with a balun (such as the ADT1-1WT) or a fully differential amplifier (such as the AD8138 or AD8352) is required for rated SFDR performance. Single-ended input drive typically reduces SFDR by 10-15 dB. Also verify that the input clock has sub-picosecond jitter - use a low-jitter clock synthesizer like the LTC6902 or a clean crystal oscillator; noisy clocks directly degrade SNR and SFDR.
Keep input traces matched in length and impedance (typically 50 ohm single-ended or 100 ohm differential) from the input driver to the ADC input pins. Route analog input traces on the top layer directly above a continuous ground plane on layer 2; avoid crossing digital output traces. Place the input common-mode bypass capacitors (typically 0.1 uF) within 2 mm of the AIN+ and AIN- pins. Use guard rings around the analog input traces if the ADC is colocated with switching converters or other noisy digital circuits. Match the parallel CMOS output trace lengths within 5 mm to preserve channel-to-channel timing skew.
合规信息
RoHS compliance requires the #PBF suffix. Standard LTC2283CUP (no suffix) may not be RoHS compliant - verify the part marking against the manufacturer datasheet. Not AEC-Q100 qualified - the part is intended for commercial/industrial applications, not automotive.
