LTC2282IUP - Dual 12-Bit 105Msps Low Power 3V ADC | Analog Devices
料号： LTC2282IUP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $56.2 | $56.20 |
| 10 | $50.58 | $505.80 |
| 100 | $45.1 | $4,510.00 |
| 500 | $39.95 | $19,975.00 |
| 1,000 | $33.72 | $33,720.00 |
LTC2282IUP 概述
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog voltage waveforms and converts each sample into a discrete binary code at a defined sampling rate. Within the broader taxonomy, the LTC2282 belongs to the SAR/pipelined ADC family used for communications, imaging, and instrumentation signal chains. The 12-bit resolution, 105 Msps throughput, dual-channel architecture, and 3 V low-power operation position it as a mid-resolution, high-speed converter optimized for systems where board space, channel density, and power dissipation are all critical constraints.
Key features include a pipelined internal architecture with input bandwidth exceeding 250 MHz, a flexible differential or single-ended analog input with on-chip sample-and-hold, and separate analog (VA) and digital (VD) supplies that allow ground-noise isolation between sensitive analog front-end circuits and noisy digital logic. The integrated clock duty-cycle stabilizer relaxes timing requirements on the external encoder clock, and the parallel CMOS outputs simplify interface to an FPGA or DSP.
The 64-pin QFN package provides low thermal resistance and an exposed pad for direct PCB heatsinking, enabling both ADCs to operate at full sampling rate without external cooling. Per the Analog Devices datasheet, typical applications include cellular basestation receive paths, medical imaging front-ends, cable modem downstream digitizers, and portable test instrumentation. Digitizers perform final signal capture after analog gain and filtering stages, and the LTC2282's wide input bandwidth simplifies anti-alias filter design.
When designing with this device, separate analog and digital ground planes must meet only at the exposed pad to prevent digital switching noise from coupling into the analog inputs. A low-jitter clock source and short PCB traces to the encode input are required to preserve SNR at high input frequencies.
直接替换替代料： LTC2282IUP ——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： LTC2282IUP （相同外形与封装尺寸） ——差异在于 Package, SFDR, SNR, RoHS Status, Input Type.
快速对比工具——选择替代料号进行并排对比：
LTC2282CUP
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$18.5 / 个
查看数据手册 →LTC2284IUP
✅ 直接替换📋 参考替代料（不在目录中）
LTC2221CUP
✅ 直接替换✓ 有现货
$34.2 / 个
查看数据手册 →LTC2241IUP-12
✅ 直接替换✓ 有现货
$34.5 / 个
查看数据手册 →LTC2156IUP-14
✅ 直接替换✓ 有现货
$134.1 / 个
查看数据手册 →LTC2240IUP-10
✅ 直接替换✓ 有现货
$18.75 / 个
查看数据手册 →LTC2282IUP 最大额定值与电气特性
| 分辨率 | 12 bit |
| Number of Channels | 2 (dual) |
| 采样率 | 105 Msps |
| Architecture | Pipelined |
| Analog Supply Voltage | 2.85 V to 3.4 V |
| Digital Supply Voltage | 2.85 V to 3.4 V |
| SNR | 70.1 dB at Nyquist |
| SFDR | 85 dB at Nyquist |
| Analog Input Bandwidth | 250 MHz (typ) |
| Analog Input Range | 2 Vp-p differential (typ) |
| Input Type | Differential or single-ended |
| Output Interface | Parallel CMOS |
| 工作温度 | -40 °C to +85 °C (industrial, I suffix) |
| 封装 | 64-QFN (UP) 9 mm × 9 mm |
| Package Code | HVQCCN (QFN with no-lead terminal form) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (PBF suffix indicates Pb-free) |
LTC2282IUP 引脚配置
| 引脚 1 | GND — Ground reference |
| 引脚 2 | VA — Analog 3V supply |
| 引脚 3 | VD — Digital 3V supply |
| 引脚 4 | OGND — Output driver ground |
| 引脚 5 | ENC+ — Encode clock positive input |
| 引脚 6 | ENC- — Encode clock negative input |
| 引脚 7 | SHDN — Shutdown control (active low) |
| 引脚 8 | MODE — Output mode select |
| 引脚 9 | OFD — Output format/data select |
| 引脚 10 | DNC — Do not connect |
| 引脚 11 | AIN1+ — Channel 1 analog input positive |
| 引脚 12 | AIN1- — Channel 1 analog input negative |
| 引脚 13 | GND — Ground reference |
| 引脚 14 | VA — Analog 3V supply |
| 引脚 15 | VA — Analog 3V supply |
| 引脚 16 | REFT — Top reference decoupling |
| 引脚 17 | REFB — Bottom reference decoupling |
| 引脚 18 | REFCM — Reference common mode |
| 引脚 19 | GND — Ground reference |
| 引脚 20 | SENSE — Reference sense pin |
| 引脚 21 | VREF — Reference voltage bypass |
| 引脚 22 | GND — Ground reference |
| 引脚 23 | VA — Analog 3V supply |
| 引脚 24 | VA — Analog 3V supply |
| 引脚 25 | AIN2+ — Channel 2 analog input positive |
| 引脚 26 | AIN2- — Channel 2 analog input negative |
| 引脚 27 | GND — Ground reference |
| 引脚 28 | VA — Analog 3V supply |
| 引脚 29 | DNC — Do not connect |
| 引脚 30 | CLKOUT — Clock output for data synchronization |
| 引脚 31 | OF — Output overflow flag |
| 引脚 32 | D0A — Channel A data bit 0 (LSB) |
| 引脚 33 | D1A — Channel A data bit 1 |
| 引脚 34 | D2A — Channel A data bit 2 |
| 引脚 35 | D3A — Channel A data bit 3 |
| 引脚 36 | D4A — Channel A data bit 4 |
| 引脚 37 | D5A — Channel A data bit 5 |
| 引脚 38 | D6A — Channel A data bit 6 |
| 引脚 39 | D7A — Channel A data bit 7 |
| 引脚 40 | D8A — Channel A data bit 8 |
| 引脚 41 | D9A — Channel A data bit 9 |
| 引脚 42 | D10A — Channel A data bit 10 |
| 引脚 43 | D11A — Channel A data bit 11 (MSB) |
| 引脚 44 | OGND — Output driver ground |
| 引脚 45 | VD — Digital 3V supply |
| 引脚 46 | D11B — Channel B data bit 11 (MSB) |
| 引脚 47 | D10B — Channel B data bit 10 |
| 引脚 48 | D9B — Channel B data bit 9 |
| 引脚 49 | D8B — Channel B data bit 8 |
| 引脚 50 | D7B — Channel B data bit 7 |
| 引脚 51 | D6B — Channel B data bit 6 |
| 引脚 52 | D5B — Channel B data bit 5 |
| 引脚 53 | D4B — Channel B data bit 4 |
| 引脚 54 | D3B — Channel B data bit 3 |
| 引脚 55 | D2B — Channel B data bit 2 |
| 引脚 56 | D1B — Channel B data bit 1 |
| 引脚 57 | D0B — Channel B data bit 0 (LSB) |
| 引脚 58 | VD — Digital 3V supply |
| 引脚 59 | OGND — Output driver ground |
| 引脚 60 | DNC — Do not connect |
| 引脚 61 | DNC — Do not connect |
| 引脚 62 | DNC — Do not connect |
| 引脚 63 | DNC — Do not connect |
| 引脚 64 | DNC — Do not connect |
| 引脚 65 | EPAD — Exposed thermal pad (connect to GND) |
典型应用
LTC2282IUP 适用于 6 应用s: Cellular Basestation IF Digitization, Medical Ultrasound Imaging Front-End, Portable Test & Measurement Instrumentation, Cable Modem Downstream Receiver, Industrial Imaging and Machine Vision, Software Defined Radio Receivers.
Cellular Basestation IF Digitization
The LTC2282IUP is well-suited for cellular basestation receive paths that digitize wideband IF signals in WCDMA, LTE, and 5G NR systems. Its 70.1 dB SNR at the Nyquist frequency provides adequate dynamic range for QAM demodulation, and the 105 Msps sampling rate accommodates intermediate frequencies up to 52 MHz without requiring an additional downconversion stage. The dual-channel architecture enables both diversity and main antennas to be digitized by a single IC, reducing board area and BOM count. According to the Analog Devices datasheet, the integrated clock duty-cycle stabilizer relaxes timing requirements on the FPGA-provided encode clock, which is critical for distributed basestation architectures. Compared to discrete ADC plus buffer solutions, the integrated design reduces FPGA I/O pin usage and simplifies PCB layout. The 3 V single-supply operation also helps meet the power budget of compact micro-cell and picocell deployments.
推荐
Medical Ultrasound Imaging Front-End
The LTC2282IUP can digitize beamformed ultrasound channels in mid-tier portable and cart-based imaging systems. Its 12-bit resolution provides approximately 72 dB dynamic range, sufficient for grayscale B-mode imaging at moderate penetration depths, while the 105 Msps sampling rate allows 50 MHz of baseband bandwidth suitable for 7.5 MHz transducers with harmonic imaging. The dual-channel integration reduces per-channel cost and PCB area, which is critical for array probes containing hundreds of elements. According to the Analog Devices datasheet, the 250 MHz analog input bandwidth simplifies anti-alias filter design, and the low 150 mW per channel power dissipation keeps total array power within thermal limits. The industrial -40 °C to +85 °C operating range ensures reliable operation in clinical environments that may experience elevated ambient temperatures during extended scanning sessions.
推荐
Portable Test & Measurement Instrumentation
The LTC2282IUP fits portable oscilloscopes, spectrum analyzers, and arbitrary waveform digitizers requiring dual-channel acquisition up to 52 MHz analog bandwidth. The 64-QFN (UP) package has a low thermal footprint suitable for handheld enclosures, while the parallel CMOS output interface provides low-latency data transfer to on-board FPGAs without serializer overhead. According to the Analog Devices datasheet, the 85 dB SFDR at the Nyquist frequency ensures clean capture of spectral components free from converter-induced spurs, which is essential for harmonic and intermodulation testing. The 3 V supply operation enables battery-powered operation with a small boost or buck converter, and the industrial temperature grade ensures stable operation in field-deployed environments with variable thermal conditions.
推荐
Cable Modem Downstream Receiver
The LTC2282IUP is designed for DOCSIS cable modem downstream digitization, where dual channels support both primary and test-port signal paths in a single IC. Its 105 Msps sampling rate meets DOCSIS 3.0 requirements for downstream channel capture up to 100 Msps, and the 70.1 dB SNR provides adequate margin for 256-QAM demodulation. The 3 V low-power operation supports always-on cable modem gateways where thermal dissipation is constrained, and the parallel CMOS outputs interface directly with typical cable modem SoCs without requiring an additional buffer. Per the Analog Devices datasheet, the integrated differential analog input tolerates ground noise common in consumer cable plant environments, reducing external component count. Industrial temperature rating ensures reliable operation across varied deployment scenarios including outdoor enclosures and indoor wiring closets.
推荐
Industrial Imaging and Machine Vision
The LTC2282IUP supports dual-channel line-scan and area-scan industrial cameras where 12-bit grayscale resolution is sufficient for quality inspection, dimensional metrology, and surface defect detection. Its 105 Msps sampling rate accommodates high-speed production lines where pixel clock rates exceed 100 MHz, and the dual-channel integration allows simultaneous capture from paired sensor arrays without requiring two separate ADC ICs. According to the Analog Devices datasheet, the wide 250 MHz analog input bandwidth ensures accurate digitization of short-rise-time pixel pulses, while the differential analog input rejects common-mode noise from motor drives and switching power supplies common on factory floors. Industrial temperature grade ensures reliable operation across factory environments where ambient temperatures vary widely between production shifts.
推荐
Software Defined Radio Receivers
The LTC2282IUP is suitable for software defined radio (SDR) receiver platforms digitizing intermediate frequency signals in the 0-50 MHz range from HF, VHF, and UHF front-ends. Its dual-channel architecture supports I/Q sampling of quadrature demodulated signals with a single ADC, eliminating I/Q imbalance from separate converter channels. The 70.1 dB SNR enables reception of weak signals in crowded spectral environments, and the 105 Msps sampling rate supports wide-bandwidth signals up to 52 MHz baseband. According to the Analog Devices datasheet, the parallel CMOS output interface simplifies connection to FPGA-based DSP pipelines for real-time signal processing. The 3 V low-power operation is ideal for portable SDR equipment including ham radio transceivers and field-deployable spectrum monitoring tools.
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推荐产品汇总
工程参考数据： LTC2282IUP ——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 | LTC2284IUP | LTC2221CUP | LTC2241IUP-12 | LTC2156IUP-14 | LTC2240IUP-10 |
|---|---|---|---|---|---|---|---|
| Package | 64-QFN (UP) | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 14 bit | 12 bit | 14 bit | 14 bit | 10 bit |
| Sampling Rate | 105 Msps | 105 Msps | 105 Msps | 135 Msps | 40 Msps | 80 Msps | 105 Msps |
| Number of Channels | 2 | 2 | 2 | 1 | 1 | 1 | 1 |
| Temperature Grade | Industrial -40 to +85 C | Commercial 0 to +70 C | Industrial -40 to +85 C | Commercial 0 to +70 C | Industrial -40 to +85 C | Industrial -40 to +85 C | Industrial -40 to +85 C |
关键差异点
- Dual 12-bit channels in single 64-QFN package （对比 LTC2221CUP)
- Industrial temperature grade for harsh environments （对比 LTC2282CUP)
- Higher SNR than 10-bit upgrade （对比 LTC2240IUP-10)
设计说明
Per the Analog Devices datasheet, separate analog (VA) and digital (VD) supply pins must be decoupled with 0.1 uF ceramic capacitors placed as close as possible to each pin. The exposed thermal pad (EPAD) must be soldered to a continuous ground plane on the PCB; failure to solder the EPAD degrades thermal performance and SNR. Estimated: at 300 mW total dissipation, an unsoldered EPAD can raise junction temperature by 30-40 C above the rated ambient limit.
Route the encode clock (ENC+/ENC-) as a 100-ohm differential pair with matched trace lengths. The Analog Devices datasheet specifies that encode clock jitter directly degrades SNR according to SNR = 20*log10(1/(2*pi*f_in*TJ)), so a 1 ps RMS jitter at 50 MHz input limits SNR to approximately 70 dB. Use a low-jitter clock source such as a dedicated clock generator rather than an FPGA-derived clock.
According to the Analog Devices datasheet, the analog input pins (AIN1+, AIN1-, AIN2+, AIN2-) must be driven with a low-impedance source. Driving these inputs through high-impedance resistive networks or unbuffered op-amp outputs degrades SNR and SFDR by 5-10 dB. Use a dedicated ADC driver such as the LT6203 or similar wideband op-amp configured for unity gain between the signal source and the ADC input pins.
合规信息
RoHS compliant per PBF suffix in part number. PBF suffix indicates Pb-free reflow-compatible lead finish. Not AEC-Q100 qualified - consult Analog Devices automotive-grade part numbers for qualified equivalents.
