LTC2288CUP - Dual 10-Bit 65Msps Low-Noise 3V ADC | Analog Devices
部品番号: LTC2288CUP ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $13.59 | $13.59 |
| 10 | $12.78 | $127.80 |
| 100 | $11.42 | $1,142.00 |
| 500 | $10.15 | $5,075.00 |
| 1,000 | $9.05 | $9,050.00 |
LTC2288CUP 概要
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.
ドロップイン代替品: LTC2288CUP — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LTC2288CUP （同一形状・フットプリント） — 相違点: Package, RoHS Status, Sample Rate, Operating Temperature Range, Input Type.
クイック比較ツール — 並列比較する代替部品を選択:
LTC2288CUP#PBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC2287CUP
✅ ドロップイン✓ 在庫あり
$7.05 / 個
データシートを見る →LTC2286CUP
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$9.56 / 個
データシートを見る →LTC2282CUP
✅ ドロップイン✓ 在庫あり
$18.5 / 個
データシートを見る →LTC2280CUP
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$15.85 / 個
データシートを見る →LTC2288CUP 最大定格＆電気的特性
| Number of Bits | 10 |
| サンプリングレート | 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) |
| パッケージ | 64-pin QFN (UP, 9x9 mm) with exposed pad |
| Package Code | HVQCCN / LFCSP |
| 実装タイプ | Surface Mount |
| 動作温度範囲 | 0 C to +70 C (commercial, C suffix) |
| RoHS ステータス | Compliant (Pb-free #PBF suffix) |
| Lead-Free Finish | Yes (Au or NiPdAu lead-free) |
LTC2288CUP hvqccn / lfcsp ピン配置ガイド
LTC2288CUP (hvqccn / lfcsp パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: LTC2288CUP.
詳細は データシート をご参照ください。
主な用途
LTC2288CUP の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LTC2288CUP — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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) |
主な差別化要因
- Top 65Msps sample rate in the LTC228x dual-10-bit family （vs LTC2287CUP)
- Dual-channel pipelined architecture in a single IC （vs Single-channel 10-bit ADCs at 65Msps)
- Single 3V supply simplifies power tree （vs 5V-supply 10-bit ADCs)
設計ノート
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.
コンプライアンス情報
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.
