LTC2266CUJ-14 - 14-Bit 80Msps Dual ADC | Analog Devices | 40-QFN
MPN: LTC2266CUJ-14 ✓ Hoạt độngLTC2266CUJ-14 Tóm tắt
What is a pipelined ADC? A pipelined analog-to-digital converter is a high-speed data-conversion architecture that uses multiple cascaded low-resolution flash stages to convert analog samples to a digital code in successive clock cycles. Pipelined ADCs sit inside the broader ADC family (which also includes SAR, delta-sigma, and flash), and they are the architecture of choice for sample rates from ~10Msps to several hundred Msps because they balance conversion speed, resolution (typically 8-16 bits), and dynamic power. The dual-channel LTE2266 provides two independent ADC cores on a single die, simplifying multi-channel communication, radar, and instrumentation designs that need synchronized sampling.
Key features of the LTC2266CUJ-14 include an 800MHz full-power sample-and-hold bandwidth, shutdown and nap power-save modes, an SPI serial port for mode configuration, and pin compatibility with 12-bit (LTC2266-12) and faster 14-bit (LTC2267-14 at 105Msps, LTC2268-14 at 125Msps) variants. The 40-pin QFN package integrates a thermally-enhanced exposed pad for low thermal resistance, which combined with the part's 1.8V analog supply operation keeps total power dissipation low enough for compact multi-channel systems.
At the architecture level, the LTC2266-14 uses a multi-stage differential pipeline with on-chip reference and sample-and-hold, internal bandgap-derived voltage reference, and selectable digital output serialization that lets the user trade off pin count for channel throughput.
Typical applications for the LTC2266CUJ-14 include communications infrastructure such as cellular base-station receivers and software-defined radio (SDR) front-ends, dual-channel test and measurement equipment, simultaneous-sampling data-acquisition systems, and multi-antenna diversity receivers. The low-power operation makes it equally suitable for portable instrumentation.
When designing with this part, ensure that the analog inputs are AC-coupled or DC-biased within the input common-mode range, and provide solid ground stitching and decoupling around the exposed pad to achieve the rated SNR. Pin compatibility with the LTC2267-14 and LTC2268-14 in the same 40-QFN package allows one PCB layout to serve multiple speed grades.
This page synthesizes distributor pricing, recommended pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho LTC2266CUJ-14 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2266CUJ-14 (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Number of Channels, Missing Codes, RoHS Status.
LTC2267CUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2268CUJ-14
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2266CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2266IUJ-14
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC2267IUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2268IUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2266CUJ-14 Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices (formerly Linear Technology) |
| Part Family | LTC2266-14 |
| Converter Type | Dual ADC (2 ADCs on one die) |
| Architecture | Pipelined |
| Độ phân giải | 14 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate (max) | 80 Msps |
| Supply Voltage (Analog/Digital) | 1.8 V |
| INL (typical) | ±1 LSB |
| DNL (typical) | ±0.3 LSB |
| Transition Noise (RMS) | 1.2 LSB |
| Full-Power Input Bandwidth | 800 MHz |
| Missing Codes | No missing codes over temperature |
| Digital Output Format | Serial LVDS (2-lane or 1-lane selectable) |
| Configuration Interface | Serial SPI port |
| Power-Save Modes | Shutdown and Nap modes |
| Package Type | 40-Pin QFN (6 mm x 6 mm) with exposed pad |
| Trạng thái RoHS | Compliant (PBF suffix) |
| Pin-Compatible Family Members | LTC2266-12 (12-bit), LTC2267-14 (105Msps), LTC2268-14 (125Msps) |
Cấu hình chân LTC2266CUJ-14
| Chân 1 | GND — Ground (analog/digital) |
| Chân 2 | AIN+ — Channel 1 analog positive input |
| Chân 3 | AIN- — Channel 1 analog negative input |
| Chân 4 | VCM — Common-mode voltage output (~0.9V) |
| Chân 5 | REFCOMP — Reference decoupling node |
| Chân 6 | REFH — Reference high decoupling |
| Chân 7 | REFL — Reference low decoupling |
| Chân 8 | AVDD — 1.8V analog supply |
| Chân 9 | GND — Ground |
| Chân 10 | AVDD — 1.8V analog supply |
| Chân 11 | GND — Ground |
| Chân 12 | VCM — Common-mode voltage output |
| Chân 13 | AIN+ — Channel 2 analog positive input |
| Chân 14 | AIN- — Channel 2 analog negative input |
| Chân 15 | GND — Ground |
| Chân 16 | ENC+ — Encode (clock) positive input |
| Chân 17 | ENC- — Encode (clock) negative input |
| Chân 18 | GND — Ground |
| Chân 19 | OVDD — 1.8V output driver supply |
| Chân 20 | OGND — Output driver ground |
| Chân 21 | OUT1A+ — Channel 1 LVDS output pair A positive |
| Chân 22 | OUT1A- — Channel 1 LVDS output pair A negative |
| Chân 23 | OGND — Output driver ground |
| Chân 24 | OUT1B+ — Channel 1 LVDS output pair B positive |
| Chân 25 | OUT1B- — Channel 1 LVDS output pair B negative |
| Chân 26 | OGND — Output driver ground |
| Chân 27 | OUT2A+ — Channel 2 LVDS output pair A positive |
| Chân 28 | OUT2A- — Channel 2 LVDS output pair A negative |
| Chân 29 | OGND — Output driver ground |
| Chân 30 | OUT2B+ — Channel 2 LVDS output pair B positive |
| Chân 31 | OUT2B- — Channel 2 LVDS output pair B negative |
| Chân 32 | OGND — Output driver ground |
| Chân 33 | OVDD — 1.8V output driver supply |
| Chân 34 | OGND — Output driver ground |
| Chân 35 | SDO — SPI serial data output |
| Chân 36 | SCK — SPI serial clock input |
| Chân 37 | CS — SPI chip select (active low) |
| Chân 38 | SDI — SPI serial data input |
| Chân 39 | MODE — 1-lane/2-lane output mode select |
| Chân 40 | OGND — Output driver ground |
Ứng dụng tiêu biểu
LTC2266CUJ-14 phù hợp cho 6 Áp dụngs: Cellular Base-Station Diversity Receivers, Software-Defined Radio (SDR) Front-Ends, Portable Test and Measurement Instrumentation, Medical Imaging Signal Acquisition, Industrial Multi-Channel Data Acquisition, Radar and Lidar Receiver Front-Ends.
Cellular Base-Station Diversity Receivers
The LTC2266CUJ-14 fits cellular base-station diversity receiver applications where two simultaneously-sampling ADC channels are required to capture paired antenna signals at IF or baseband. With 14-bit resolution, 80 Msps sample rate, and 800 MHz full-power input bandwidth, each channel preserves sufficient dynamic range to resolve small desired signals in the presence of large interferers. The 1.8V supply and low power dissipation keep multi-channel receiver cards within their thermal budgets. The part's serial LVDS outputs minimize FPGA pin count when routing four-channel or eight-channel diversity configurations. For wider instantaneous bandwidth, designers can substitute the pin-compatible LTC2267IUJ-14 (105 Msps) on the same PCB.
Được đề xuất
Software-Defined Radio (SDR) Front-Ends
The LTC2266CUJ-14 is well-suited for SDR front-end I/Q digitizer boards, where it digitizes the I (in-phase) and Q (quadrature) signal pair from a direct-conversion tuner. The dual pipelined ADC cores share a single input clock and sample in lock-step, preserving the I/Q phase relationship essential for correct demodulation. The 14-bit resolution gives roughly 86 dB of theoretical SNR, more than adequate for narrowband digital modes, and the 800 MHz analog input bandwidth lets the same front-end cover HF through lower UHF. Designers needing wider capture bandwidth can move to the pin-compatible LTC2268IUJ-14 (125 Msps) on the same PCB footprint.
Được đề xuất
Portable Test and Measurement Instrumentation
The LTC2266CUJ-14 is commonly deployed in portable oscilloscopes, spectrum analyzers, and dual-channel data-acquisition modules where simultaneous sampling of two channels at 14-bit resolution is required. Each ADC core offers ±1 LSB INL (typ) and ±0.3 LSB DNL (typ) for accurate DC measurements, while 80 Msps per channel captures transient events with sufficient time resolution for most bench instruments. The integrated shutdown and nap power-save modes are particularly valuable in battery-powered instruments, allowing unused channels or the entire chip to enter low-power state between acquisition bursts. The 40-QFN exposed-pad package keeps the footprint small enough for handheld form factors.
Được đề xuất
Medical Imaging Signal Acquisition
The LTC2266CUJ-14 supports medical imaging front-ends such as ultrasound beamforming pre-beam summation stages and dual-channel patient monitoring systems. The dual simultaneous sampling capability lets designers digitize paired transducer channels without inter-channel skew, while 14-bit resolution is sufficient for tissue-echo amplitude quantification. The serial LVDS interface simplifies routing across the high-density transducer-array cables that connect the probe head to the imaging console. Per IEC 60601 medical safety considerations, Analog Devices products are routinely used in medical equipment, though compliance requires full system-level qualification.
Được đề xuất
Industrial Multi-Channel Data Acquisition
The LTC2266CUJ-14 is ideal for industrial multi-channel data-acquisition systems that need to sample two synchronous sensor channels at industrial-grade precision. The 14-bit resolution and ±1 LSB INL provide the accuracy needed for vibration monitoring, power-line monitoring, and multi-axis strain-gauge readout. The shutdown and nap modes support low-duty-cycle sampling schemes that conserve power in remote or battery-powered industrial sensors. The 40-QFN footprint allows four or more dual-ADC parts to be placed on a single acquisition board for 8-16 channel systems, all clocked from a shared reference clock.
Được đề xuất
Radar and Lidar Receiver Front-Ends
The LTC2266CUJ-14 can digitize I/Q baseband signals from FMCW radar and coherent lidar receiver chains. The simultaneous-sampling dual channel architecture preserves the relative phase information needed for FFT-based Doppler extraction. The 800 MHz full-power input bandwidth allows analog IF stages to use wider bandwidths than the 80 Msps Nyquist rate would suggest, providing flexibility for interleave and harmonic-sampling architectures. The serial LVDS outputs minimize FPGA pin count when many receiver channels are aggregated on a single FPGA. The shutdown and nap modes let designers gate ADC power consumption between radar pulse bursts.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2266CUJ-14 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2267CUJ-14 | LTC2268CUJ-14 | LTC2266CUJ-12 | LTC2267IUJ-14 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 40-QFN (6x6) | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same |
| Resolution | 14 bit | 14 bit | 14 bit | 12 bit | 14 bit |
| Sample Rate | 80 Msps | 105 Msps | 125 Msps | 80 Msps | 105 Msps |
| Channels | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Output Format | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Temperature Grade | Commercial | Commercial | Commercial | Commercial | Industrial |
Bảo phân biệt quan trọng
- Higher sample rate than LTC2266 at same footprint (vsLTC2267CUJ-14)
- Dual simultaneous sampling on one die (vsLTC2258CUJ-12)
- 1.8V low-power operation (vsLTC2260CUJ-14)
Ghi chú thiết kế
Place the analog input coupling capacitors, common-mode bypass capacitors, and reference decoupling caps (REFH/REFL/REFCOMP) within 2 mm of their respective pins to preserve the 800 MHz full-power input bandwidth. Use a continuous ground plane under the part with the exposed thermal pad soldered to it through at least 9 thermal vias for best heat dissipation. According to the Analog Devices 22687614f datasheet, separate analog and digital ground islands should join only at the part's ground pins to avoid coupling digital switching noise into the sensitive analog inputs.
Route the LVDS output pairs (OUT1A, OUT1B, OUT2A, OUT2B) as 100 ohm differential traces with matched length (within 0.5 mm) to the FPGA. Keep OVDD supply decoupling within 50 mm of each pair and route OGND adjacent to the differential pairs to provide a controlled return path. The serial LVDS interface supports both 1-lane mode (one bit per channel per clock) and 2-lane mode (two bits per channel per clock); the MODE pin (pin 39) selects this at power-up. For high sample rates, 2-lane mode is recommended to keep the per-bit data rate below the FPGA's LVDS receiver capability.
Do not float any AVDD pin - every AVDD pin must be powered from the same low-noise 1.8V rail with its own 0.1uF ceramic bypass cap. Missing decoupling on even one AVDD pin can degrade SNR by several dB at maximum sample rate. The ENC+/ENC- differential clock must be driven from a low-jitter source; input clock jitter above 0.5 ps RMS directly limits SNR to roughly SNR_dB = 20*log10(1/(2*pi*f*sigma_jitter)). Use nap mode carefully - a 1 ms wake-up time is typical and must be factored into burst-mode acquisitions. According to the 22687614f datasheet, applying clock with no analog input present for extended periods can cause some pipelined ADCs to draw slightly higher supply current; never disable the analog input coupling network while the clock is running.
Thông tin tuân thủ
RoHS and lead-free compliance indicated by the #PBF and #TRPBF part-number suffixes per Analog Devices product page. Not AEC-Q100 qualified; AEC-Q100 is generally not applicable to precision converter ICs in this category - check industrial-grade variants (IUJ suffix) for harsher environments.
