LTC2240IUP-12 - 12-Bit 170Msps ADC, 64-QFN | Analog Devices
MPN: LTC2240IUP-12 ✓ نشطLTC2240IUP-12 نظرة عامة
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts real-world analog voltages into discrete digital codes at a sampling rate, serving as the interface between RF/analog front ends and digital signal processors. Within the broader signal-chain taxonomy, the LTC2240IUP-12 sits in the high-speed pipeline ADC category (12-bit resolution, 100+ Msps), which sits under successive-approximation and flash architectures for sampling rates up to several hundred Msps. In the system hierarchy, pipeline ADCs occupy the tier between general-purpose SAR ADCs (<=10 Msps) and ultra-high-speed interleaved or JESD204B-class ADCs (>500 Msps).
Key features of the LTC2240IUP-12 include a 65.6 dB signal-to-noise ratio, 80 dB SFDR at 170 Msps with a 70 MHz input, and an aperture jitter of 0.15 ps RMS, making it suitable for undersampling IF signals in communications receivers. The device supports full-power analog input bandwidth above 500 MHz and offers programmable gain and offset adjustment via dedicated SPI pins, with an internal bandgap reference and integrated input common-mode bias. Power dissipation is 638 mW typical at 170 Msps with CMOS outputs and scales downward at lower clock rates.
The LTC2240IUP-12 uses a multi-stage pipelined architecture with proprietary input sample-and-hold and digital error correction, allowing it to maintain 12-bit linearity and low spurious content across Nyquist input frequencies. The differential input structure provides common-mode rejection, and the LVDS output option enables high-data-rate transfer over long PCB traces without EMI issues. An internal duty-cycle stabilizer compensates for clock-source non-50 percent duty cycle, simplifying clock-tree design in FPGA-based systems.
Typical applications include cellular base-station receiver IF digitizers, cable-headend downstream QAM demodulators, radar and phased-array signal acquisition, medical imaging front ends, and high-speed data-acquisition cards for test and measurement. It also fits spectrum analyzer and software-defined radio ADC positions where 12-bit dynamic range at 170 Msps is sufficient.
When designing with this ADC, pay close attention to analog input network design: use a transformer-coupled or differential op-amp driver with appropriate input common-mode biasing, and provide a low-noise clock source with jitter below 0.5 ps RMS to preserve SNR. The exposed pad of the 64-QFN must be soldered to a continuous ground plane to achieve the rated thermal performance and to provide the necessary ground return for the input stage.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design guidance that complement the official Analog Devices datasheet for procurement and engineering decisions.
بدائل مباشرة لـ LTC2240IUP-12 — 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 LTC2240IUP-12 (نفس عامل الشكل والبصمة) — يختلف في Package, SFDR, SNR, Sample Rate, Aperture Jitter.
LTC2240IUP-10
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2240CUP-12
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LTC2241CUP-12
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2221CUP
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2206IUK
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LTC2240IUP-12 الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bits |
| Number of Channels | 1 |
| معدل أخذ العينات | 170 Msps |
| Architecture | Pipelined |
| Input Type | Differential |
| Full-Scale Input Range | 2 Vp-p |
| Data Interface | Parallel CMOS or LVDS (selectable) |
| SNR | 65.6 dB at 70 MHz input |
| SFDR | 80 dB at 70 MHz input |
| Aperture Jitter | 0.15 ps RMS |
| Analog Supply Voltage | 3.3 V (typ) |
| Digital Supply Voltage | 3.3 V or 1.8 V (selectable) |
| Power Dissipation | 638 mW (typ, 170 Msps, CMOS outputs) |
| العلبة | 64-QFN (9x9 mm) with exposed pad |
| Operating Temperature Range (I grade) | -40 C to +85 C |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (#PBF suffix) |
تكوين أطراف LTC2240IUP-12
| دبوس 1 | OGND — Output driver ground |
| دبوس 2 | D0 — Data output bit 0 (LSB, CMOS or LVDS) |
| دبوس 3 | D1 — Data output bit 1 (CMOS or LVDS) |
| دبوس 4 | D2 — Data output bit 2 (CMOS or LVDS) |
| دبوس 5 | D3 — Data output bit 3 (CMOS or LVDS) |
| دبوس 6 | D4 — Data output bit 4 (CMOS or LVDS) |
| دبوس 7 | D5 — Data output bit 5 (CMOS or LVDS) |
| دبوس 8 | D6 — Data output bit 6 (CMOS or LVDS) |
| دبوس 9 | D7 — Data output bit 7 (CMOS or LVDS) |
| دبوس 10 | OGND — Output driver ground |
| دبوس 11 | D8 — Data output bit 8 (CMOS or LVDS) |
| دبوس 12 | D9 — Data output bit 9 (CMOS or LVDS) |
| دبوس 13 | D10 — Data output bit 10 (CMOS or LVDS) |
| دبوس 14 | D11 — Data output bit 11 (MSB, CMOS or LVDS) |
| دبوس 15 | OGND — Output driver ground |
| دبوس 16 | OVDD — Output driver supply |
| دبوس 17 | OVDD — Output driver supply |
| دبوس 18 | OGND — Output driver ground |
| دبوس 19 | CLKOUT- — Differential clock output negative |
| دبوس 20 | CLKOUT+ — Differential clock output positive |
| دبوس 21 | OGND — Output driver ground |
| دبوس 22 | ENC+ — Encode clock input positive |
| دبوس 23 | ENC- — Encode clock input negative |
| دبوس 24 | OGND — Output driver ground |
| دبوس 25 | OVDD — Output driver supply |
| دبوس 26 | OVDD — Output driver supply |
| دبوس 27 | MODE — Output mode select (CMOS/LVDS) |
| دبوس 28 | OGND — Output driver ground |
| دبوس 29 | SHDN — Shutdown control (active high) |
| دبوس 30 | CS — Chip select for serial configuration |
| دبوس 31 | SCK — Serial configuration clock |
| دبوس 32 | SDI — Serial configuration data input |
| دبوس 33 | SDO — Serial configuration data output |
| دبوس 34 | AGND — Analog ground |
| دبوس 35 | VREF — Voltage reference bypass |
| دبوس 36 | SENSE — Reference configuration pin |
| دبوس 37 | VCM — Common-mode voltage output |
| دبوس 38 | A+ — Differential analog input positive |
| دبوس 39 | A- — Differential analog input negative |
| دبوس 40 | AGND — Analog ground |
| دبوس 41 | AGND — Analog ground |
| دبوس 42 | AVDD — Analog 3.3V supply |
| دبوس 43 | AVDD — Analog 3.3V supply |
| دبوس 44 | AGND — Analog ground |
| دبوس 45 | AGND — Analog ground |
| دبوس 46 | AVDD — Analog 3.3V supply |
| دبوس 47 | AVDD — Analog 3.3V supply |
| دبوس 48 | AGND — Analog ground |
| دبوس 49 | NC — Not connected (per datasheet) |
| دبوس 50 | NC — Not connected (per datasheet) |
| دبوس 51 | AGND — Analog ground |
| دبوس 52 | AVDD — Analog 3.3V supply |
| دبوس 53 | AVDD — Analog 3.3V supply |
| دبوس 54 | AGND — Analog ground |
| دبوس 55 | NC — Not connected (per datasheet) |
| دبوس 56 | NC — Not connected (per datasheet) |
| دبوس 57 | AGND — Analog ground |
| دبوس 58 | AVDD — Analog 3.3V supply |
| دبوس 59 | AVDD — Analog 3.3V supply |
| دبوس 60 | AGND — Analog ground |
| دبوس 61 | AGND — Analog ground |
| دبوس 62 | AVDD — Analog 3.3V supply |
| دبوس 63 | AVDD — Analog 3.3V supply |
| دبوس 64 | AGND — Analog ground |
التطبيقات النموذجية
LTC2240IUP-12 مناسب لـ 6 التطبيقs: Cellular Base-Station IF Digitizer, Cable Headend QAM Demodulator, Radar and Phased-Array Signal Acquisition, Medical Imaging Front End (Ultrasound), High-Speed Data Acquisition Card, Software-Defined Radio (SDR) Receiver.
Cellular Base-Station IF Digitizer
The LTC2240IUP-12 fits cellular base-station receiver IF digitizers because its 170 Msps sampling rate captures the full bandwidth of multi-carrier UMTS/LTE IF signals (typically 70-140 MHz) without aliasing. The 65.6 dB SNR and 80 dB SFDR preserve the noise figure and adjacent-channel rejection required for 3G/4G receiver sensitivity, and the LVDS output mode drives long PCB traces to the FPGA without EMI issues. Place the ADC after the final IF mixer and SAW filter; pair with a differential transformer driver (e.g., ADT1-1WT) and feed an FPGA with dedicated LVDS receivers. Unlike 16-bit ADCs in the same family, the LTC2240IUP-12 delivers sufficient dynamic range at lower power and cost for cost-sensitive pico-cell and femtocell deployments.
موصى به
Cable Headend QAM Demodulator
The LTC2240IUP-12 is suitable for cable-headend downstream QAM demodulation where the IF digitizer must capture a 6-8 MHz channel and several adjacent channels simultaneously. Its 170 Msps sampling rate and 80 dB SFDR provide enough spurious-free dynamic range to demodulate 256-QAM constellations without adjacent-channel interference artifacts; the differential input structure rejects common-mode noise from the upstream LNA. Use the ADC with an automatic gain control (AGC) loop ahead of the input transformer, and decode the LVDS outputs into a demodulator ASIC or FPGA running a soft-decision QAM algorithm. Compared with 14-bit ADCs, the LTC2240IUP-12 cuts cost while still delivering CNR margin for dense channel stacking.
موصى به
Radar and Phased-Array Signal Acquisition
The LTC2240IUP-12 works well in radar and phased-array receiver channels that require digitizing pulsed IF signals-Doppler returns. Its 0.15 ps RMS aperture jitter preserves SNR when sampling narrow pulse returns, and the 170 Msps rate captures the full radar IF bandwidth of 70-80 MHz without aliasing. The differential input accepts a transformer-coupled IF strip output, and the LVDS digital interface routes data cleanly to the FPGA or DSP back-end for matched-filter processing. For larger phased arrays requiring multiple ADC channels, several LTC2240IUP-12 devices share a common clock to maintain sample-accurate alignment across channels. Compared to 16-bit alternatives, the 12-bit resolution matches the dynamic range of most surveillance and weather radar front ends at lower cost and power.
موصى به
Medical Imaging Front End (Ultrasound)
The LTC2240IUP-12 can be used in portable ultrasound receiver boards where the IF stage output must be digitized at 40-70 MHz after the TGC (time-gain-compensation) amplifier. Its 65.6 dB SNR is sufficient for B-mode imaging dynamic range, and the 170 Msps rate captures the full IF passband needed for beamformer processing in the FPGA. The exposed-pad 64-QFN package provides the thermal relief required for dense multi-channel receiver boards where several ADCs sit adjacent to each other. Use a low-noise LDO for the analog supply rail and separate the digital LVDS traces from the analog input network with a continuous ground moat. Compared to higher-resolution ADCs, the LTC2240IUP-12 reduces per-channel cost for budget-constrained portable ultrasound designs.
موصى به
High-Speed Data Acquisition Card
The LTC2240IUP-12 fits PCI/PCIe data-acquisition cards for test and measurement instruments that sample one or two channels of transient or repetitive signals at high rates. The selectable CMOS or LVDS output modes let the card designer match the digital interface to the on-board FPGA or buffer memory; CMOS mode simplifies low-cost interfaces while LVDS supports high-data-rate streaming to a large FIFO bank. The single-channel input structure pairs naturally with an analog front-end multiplexer when multi-channel sampling is required. Compared to oscilloscope-grade ADCs, the LTC2240IUP-12 offers adequate 12-bit dynamic range at a far lower price per channel for production test equipment.
موصى به
Software-Defined Radio (SDR) Receiver
The LTC2240IUP-12 is a strong fit for software-defined radio receiver designs that digitize a low-IF or direct-conversion signal at 70-80 MHz. Its 0.15 ps aperture jitter is low enough to preserve SNR when undersampling higher-frequency tuners, and the 170 Msps rate delivers 80 MHz of usable Nyquist bandwidth for SDR channel aggregation. The LVDS output mode feeds an FPGA that performs channelization and demodulation in software, eliminating analog IF filter chains. Power dissipation of 638 mW is acceptable for fixed-install SDR receivers; for portable SDR applications, the lower-speed LTC2241CUP-12 reduces power while sharing the same footprint. Compared to JESD204B ADCs in higher-end SDR designs, the LTC2240IUP-12 simplifies board layout and FPGA firmware at the cost of more digital output traces.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LTC2240IUP-12 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LTC2240IUP-10 | LTC2240CUP-12 | LTC2241CUP-12 | LTC2221CUP | LTC2206IUK |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Resolution | 12 bits | 10 bits | 12 bits | 12 bits | 12 bits | 16 bits |
| Sampling Rate | 170 Msps | 170 Msps | 170 Msps | 135 Msps | 105 Msps | 80 Msps |
| Temperature Grade | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Commercial (0 to +70 C) | Commercial (0 to +70 C) | Commercial (0 to +70 C) | Industrial (-40 to +85 C) |
أبرز الفروقات
- Highest sampling rate in the LTC224x pin-compatible family (مقابلLTC2241CUP-12)
- Industrial temperature grade with 12-bit resolution (مقابلLTC2240IUP-10)
- Selectable CMOS or LVDS digital output in one device (مقابلLTC2206IUK)
ملاحظات التصميم
Use a transformer-coupled or fully-differential op-amp driver at the analog input (A+, A-); a 1:1 transformer such as ADT1-1WT with 50 ohm termination on the primary side delivers the 2 Vp-p full-scale swing while providing common-mode rejection. Keep the analog input traces symmetric and short, and surround them with a continuous ground moat to avoid coupling from the LVDS digital outputs.
Aperture jitter is dominated by the encode clock source; use a low-jitter clock driver (e.g., a fixed-frequency TCXO or clean FPGA PLL output) with measured RMS jitter below 0.5 ps to preserve the rated 65.6 dB SNR. Running the encode clock through a noisy FPGA PLL or long distribution tree will degrade SNR by several dB. Route the encode clock differentially (ENC+/ENC-) and terminate at the ADC pins.
Estimated: at 638 mW typical dissipation in the 64-QFN package, junction temperature rise above ambient is approximately 33 C/W x 0.638 W = 21 C with the exposed pad soldered to a 1-square-inch copper ground plane on a 4-layer PCB. For densely-stacked multi-channel receiver boards, ensure each ADC has adequate copper area or consider airflow to keep junction temperature below 125 C.
معلومات الامتثال
RoHS compliant as indicated by the #PBF suffix per Analog Devices product page. AEC-Q100 not applicable for this non-automotive-grade ADC. Halogen-free status not explicitly stated in verified web data.
