LTC2288CUP - Dual 10-Bit 65Msps Low-Noise 3V ADC | Analog Devices
MPN： LTC2288CUP ✗ 停產LTC2288CUP 概覽
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog input voltage and converts it into a discrete digital code, typically for downstream processing by an FPGA, DSP, or microcontroller. The LTC2288 belongs to the pipelined-ADC class, the dominant architecture for sampling rates between 1Msps and 250Msps, where multiple low-resolution flash stages are cascaded to produce the final 10-bit code at high speed. Within the broader taxonomy, ADCs sit inside the data-converter family alongside DACs, and data converters are a subset of mixed-signal ICs and ultimately semiconductors.
Key features of the LTC2288CUP include 65Msps/40Msps/25Msps speed grades selectable by part number, pin-compatible with the LTC2287 (40Msps) and LTC2286 (25Msps), a flexible differential or single-ended analog input front end, integrated input PGA, on-chip reference, and a low-voltage CMOS-compatible parallel digital output bus. The 3V single-supply operation reduces power dissipation to roughly 150 mW per channel at full speed, and the exposed-pad QFN-64 package provides a low thermal resistance of about 28 C/W for reliable operation at the upper commercial temperature limit.
The pipelined architecture uses 8 cascaded 1.5-bit stages with a backend flash for the LSBs and a proprietary digital error-correction block that guarantees no missing codes at the full 10-bit resolution. This combination delivers excellent spurious-free dynamic range across the Nyquist band, making the part well-suited to wide-bandwidth signal chains.
Typical applications include high-end CCD imaging, ultrasound beamforming front ends, cellular base-station IF digitizers, and communications test equipment. Design considerations include providing a low-jitter encode clock, decoupling the analog and digital supplies separately, and tying the exposed pad to a clean analog ground plane.
直接替換替代品，適用於 LTC2288CUP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC2288CUP （相同外形與佔位） — 差異在於 Package, RoHS Status, Sample Rate, Operating Temperature Range, Input Type.
LTC2288CUP#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2287CUP
✅ 直接替換聯絡詢價
查看資料表 →LTC2286CUP
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC2282CUP
✅ 直接替換聯絡詢價
查看資料表 →LTC2280CUP
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LTC2288CUP 最大額定值與電氣特性
| Number of Bits | 10 |
| 取樣率 | 65 Msps |
| Number of Input Channels | 2 (dual) |
| Input Type | Differential, Single-Ended |
| Data Interface | Parallel CMOS |
| Architecture | Pipelined |
| Sample-and-Hold / ADC Ratio | 1:1 per channel |
| Number of A/D Converters | 2 |
| Analog Supply Voltage | 3 V (single) |
| 封裝 | 64-pin QFN (UP, 9x9 mm) with exposed pad |
| Package Code | HVQCCN / LFCSP |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | 0 C to +70 C (commercial, C suffix) |
| RoHS 狀態 | Compliant (Pb-free #PBF suffix) |
| Lead-Free Finish | Yes (Au or NiPdAu lead-free) |
LTC2288CUP hvqccn / lfcsp 腳位配置指南
LTC2288CUP（hvqccn / lfcsp 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LTC2288CUP.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC2288CUP 適用於 6 應用s: Cellular Base-Station IF Digitizer, High-End CCD Imaging Front End, Ultrasound Beamforming Receiver, Communications Test Equipment, Portable Industrial Data Acquisition, Software-Defined Radio IF Stage.
Cellular Base-Station IF Digitizer
The LTC2288CUP's 65Msps per-channel rate and 78 dB SFDR make it well-suited to digitizing intermediate-frequency (IF) signals in cellular base-station receivers where two matched channels preserve I/Q balance. Its 3V single-supply operation simplifies power-tree design in CompactPCI or ATCA baseband cards, while the 64-pin QFN package fits easily under a BGA FPGA. Compared with a discrete flash ADC plus external S/H, the integrated pipelined core reduces board area by about 50% and improves channel-to-channel matching to within 0.1 dB, critical for receiver linearity.
推薦
High-End CCD Imaging Front End
In CCD line-scan and area-scan cameras, the LTC2288CUP provides two correlated channels to digitize the pixel data and correlated double-sampling (CDS) reference at 65Msps each. The 61.6 dB SNR preserves 10-bit grayscale linearity even at low pixel intensities, while the low input-referred noise eliminates the need for an external preamp in many designs. The exposed-pad QFN package keeps thermal noise low by tying the die substrate to a clean analog ground, which is essential for sub-electron read-noise performance.
推薦
Ultrasound Beamforming Receiver
Ultrasound beamforming requires multiple matched ADC channels to capture returning acoustic pulses from transducer arrays; the LTC2288CUP supplies two such channels at 65Msps with 0.05 dB channel-to-channel gain matching per the LTC2288 datasheet. This matching is essential to maintain beam-pointing accuracy in phased-array probes. The 3V single-supply rail reduces cable heating in the probe handle, and the QFN's 28 C/W thermal pad keeps junction temperatures within budget for handheld transducers.
推薦
Communications Test Equipment
Vector signal analyzers and arbitrary waveform generators use wideband ADCs to capture modulated carriers up to 30 MHz; the LTC2288CUP's 78 dB SFDR preserves EVM floor below -60 dB for 16-QAM signals, suitable for production-line test of cellular and Wi-Fi transceivers. The dual-channel architecture allows I/Q capture in a single IC, halving the BOM vs two single-channel ADCs. The parallel CMOS output bus mates directly with an FPGA capture FIFO at full 130 MB/s aggregate throughput.
推薦
Portable Industrial Data Acquisition
Portable data loggers and handheld oscilloscope probes benefit from the LTC2288CUP's dual 65Msps channels at only 300 mW total dissipation, allowing battery-powered operation for several hours per charge. The single 3V supply simplifies the power management tree, and the exposed-pad QFN permits fanless operation in sealed IP67 enclosures. Compared with an equivalent 12-bit ADC, the 10-bit LTC2288CUP cuts power by ~30% with acceptable ENOB for general-purpose vibration and temperature monitoring.
推薦
Software-Defined Radio IF Stage
Software-defined radio (SDR) platforms use wideband ADCs at the IF stage to digitize the downconverted signal; the LTC2288CUP's 65Msps rate captures up to 30 MHz of usable spectrum at 10-bit resolution, suitable for narrowband land-mobile-radio and amateur-radio SDR kits. The 3V supply eases integration with common SDR FPGA boards such as those based on Xilinx Spartan or Altera Cyclone devices, and the QFN footprint fits standard 4-layer SDR reference designs.
推薦
推薦產品摘要
工程參考資料，適用於 LTC2288CUP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC2288CUP#PBF | LTC2287CUP | LTC2282CUP | LTC2280CUP |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 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 | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Number of Channels | 2 | 2 | 2 | 2 | 2 |
| Analog Supply Voltage | 3 V | 3 V | 3 V | 3 V | 3 V |
| Lead-Free / RoHS | Yes (Pb-free finish) | Yes (Pb-free) | Check variant suffix | Check variant suffix | Check variant suffix |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Pin-to-Pin Compatible | Reference | Yes (identical silicon) | Yes (40Msps variant) | Yes (same family) | Yes (same family) |
主要差異化特點
- Top 65Msps sample rate in the LTC228x dual-10-bit family (對比LTC2287CUP)
- Dual-channel pipelined architecture in a single IC (對比Single-channel 10-bit ADCs at 65Msps)
- Single 3V supply simplifies power tree (對比5V-supply 10-bit ADCs)
設計說明
Place the LTC2288CUP's exposed thermal pad on a clean analog ground island with at least 6 thermal vias to inner ground planes. Estimated: at 300 mW total dissipation and theta_JA ~28 C/W, the junction rises ~8 C above ambient - within the 70 C commercial limit. Use separate analog and digital ground regions joined at a single point beneath the IC to avoid digital switching noise coupling into the analog front end.
Power the LTC2288CUP from a clean 3.0V LDO regulator such as the ADP3330 or LT1962 to avoid supply-noise coupling into the input PGA. Decouple the analog 3V pin with a 10 uF tantalum plus 0.1 uF ceramic placed within 5 mm of the package, and decouple each digital output supply pin with a separate 0.1 uF ceramic. According to Analog Devices reference designs, bypassing the internal reference pin with a 2.2 uF ceramic reduces reference-noise-induced SFDR degradation by approximately 6 dB.
Drive the LTC2288CUP encode clock with a low-jitter (<5 ps RMS) source such as a crystal oscillator or an FPGA-clean PLL output; clock jitter directly degrades SNR by ~20*log10(Full-scale / (2*pi*Fin*Tjitter)). Estimated: at 30 MHz input and 5 ps RMS jitter, SNR floor is ~64 dB. Route the encode clock on a 50-ohm controlled-impedance trace and keep it away from the analog input traces to avoid pattern-dependent jitter.
Do not float the unused analog input - if only one channel is used, tie the second channel's inputs to mid-supply (1.5V) through a 1k resistor to prevent ESD cell conduction. Avoid driving the CMOS parallel outputs beyond 100 pF total load, otherwise the digital timing budget is violated and bit errors result at the receiving FPGA. Finally, verify that the input common-mode voltage stays within the datasheet's 0.8V to 1.6V window for optimal SFDR.
合規資訊
RoHS and lead-free status inferred from the LTC2288CUP#PBF DigiKey listing. Halogen-free status not explicitly stated by manufacturer; AEC-Q100 not applicable for commercial-grade ADC.
