LTC2282IUP - Dual 12-Bit 105Msps Low Power 3V ADC | Analog Devices
MPN: LTC2282IUP ✓ نشطLTC2282IUP نظرة عامة
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.
بدائل مباشرة لـ LTC2282IUP — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LTC2282IUP (نفس عامل الشكل والبصمة) — يختلف في Package, SFDR, SNR, RoHS Status, Input Type.
LTC2282CUP
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2284IUP
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LTC2221CUP
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2241IUP-12
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2156IUP-14
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2240IUP-10
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2282IUP الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bit |
| Number of Channels | 2 (dual) |
| معدل أخذ العينات | 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 |
| درجة حرارة التشغيل | -40 °C to +85 °C (industrial, I suffix) |
| العلبة | 64-QFN (UP) 9 mm × 9 mm |
| Package Code | HVQCCN (QFN with no-lead terminal form) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (PBF suffix indicates Pb-free) |
تكوين أطراف LTC2282IUP
| دبوس 1 | GND — Ground reference |
| دبوس 2 | VA — Analog 3V supply |
| دبوس 3 | VD — Digital 3V supply |
| دبوس 4 | OGND — Output driver ground |
| دبوس 5 | ENC+ — Encode clock positive input |
| دبوس 6 | ENC- — Encode clock negative input |
| دبوس 7 | SHDN — Shutdown control (active low) |
| دبوس 8 | MODE — Output mode select |
| دبوس 9 | OFD — Output format/data select |
| دبوس 10 | DNC — Do not connect |
| دبوس 11 | AIN1+ — Channel 1 analog input positive |
| دبوس 12 | AIN1- — Channel 1 analog input negative |
| دبوس 13 | GND — Ground reference |
| دبوس 14 | VA — Analog 3V supply |
| دبوس 15 | VA — Analog 3V supply |
| دبوس 16 | REFT — Top reference decoupling |
| دبوس 17 | REFB — Bottom reference decoupling |
| دبوس 18 | REFCM — Reference common mode |
| دبوس 19 | GND — Ground reference |
| دبوس 20 | SENSE — Reference sense pin |
| دبوس 21 | VREF — Reference voltage bypass |
| دبوس 22 | GND — Ground reference |
| دبوس 23 | VA — Analog 3V supply |
| دبوس 24 | VA — Analog 3V supply |
| دبوس 25 | AIN2+ — Channel 2 analog input positive |
| دبوس 26 | AIN2- — Channel 2 analog input negative |
| دبوس 27 | GND — Ground reference |
| دبوس 28 | VA — Analog 3V supply |
| دبوس 29 | DNC — Do not connect |
| دبوس 30 | CLKOUT — Clock output for data synchronization |
| دبوس 31 | OF — Output overflow flag |
| دبوس 32 | D0A — Channel A data bit 0 (LSB) |
| دبوس 33 | D1A — Channel A data bit 1 |
| دبوس 34 | D2A — Channel A data bit 2 |
| دبوس 35 | D3A — Channel A data bit 3 |
| دبوس 36 | D4A — Channel A data bit 4 |
| دبوس 37 | D5A — Channel A data bit 5 |
| دبوس 38 | D6A — Channel A data bit 6 |
| دبوس 39 | D7A — Channel A data bit 7 |
| دبوس 40 | D8A — Channel A data bit 8 |
| دبوس 41 | D9A — Channel A data bit 9 |
| دبوس 42 | D10A — Channel A data bit 10 |
| دبوس 43 | D11A — Channel A data bit 11 (MSB) |
| دبوس 44 | OGND — Output driver ground |
| دبوس 45 | VD — Digital 3V supply |
| دبوس 46 | D11B — Channel B data bit 11 (MSB) |
| دبوس 47 | D10B — Channel B data bit 10 |
| دبوس 48 | D9B — Channel B data bit 9 |
| دبوس 49 | D8B — Channel B data bit 8 |
| دبوس 50 | D7B — Channel B data bit 7 |
| دبوس 51 | D6B — Channel B data bit 6 |
| دبوس 52 | D5B — Channel B data bit 5 |
| دبوس 53 | D4B — Channel B data bit 4 |
| دبوس 54 | D3B — Channel B data bit 3 |
| دبوس 55 | D2B — Channel B data bit 2 |
| دبوس 56 | D1B — Channel B data bit 1 |
| دبوس 57 | D0B — Channel B data bit 0 (LSB) |
| دبوس 58 | VD — Digital 3V supply |
| دبوس 59 | OGND — Output driver ground |
| دبوس 60 | DNC — Do not connect |
| دبوس 61 | DNC — Do not connect |
| دبوس 62 | DNC — Do not connect |
| دبوس 63 | DNC — Do not connect |
| دبوس 64 | DNC — Do not connect |
| دبوس 65 | EPAD — Exposed thermal pad (connect to GND) |
التطبيقات النموذجية
LTC2282IUP مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LTC2282IUP — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Dual 12-bit channels in single 64-QFN package (مقابلLTC2221CUP)
- Industrial temperature grade for harsh environments (مقابلLTC2282CUP)
- Higher SNR than 10-bit upgrade (مقابلLTC2240IUP-10)
ملاحظات التصميم
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.
معلومات الامتثال
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.
