LTC2266IUJ-12 - 12-Bit 80Msps Dual ADC | Analog Devices
MPN: LTC2266IUJ-12 ✓ Hoạt độngLTC2266IUJ-12 Tóm tắt
A pipelined ADC is a high-speed analog-to-digital converter architecture that resolves one or two bits per clock stage across multiple cascaded gain stages, achieving tens to hundreds of MSps while keeping per-stage power dissipation modest. Pipelined ADCs sit in the broader hierarchy of Nyquist-rate data converters (SAR, pipeline, flash), and are widely used in communications infrastructure, digital oscilloscopes, and imaging systems where sample rate matters more than absolute DC precision. The LTC2266-12 belongs to Analog Devices' LTC2266 family of dual ADCs, which shares pinout with the 14-bit LTC2266-14 and 10-bit LTC2266-10 versions, enabling a single PCB layout to support multiple resolution points.
Key features include 64.9 dB SNR (typical), 80 dB SFDR, an internal reference, shutdown and nap power-down modes for energy-conscious designs, and a flexible LVDS or CMOS output interface selectable through the SPI port. The integrated bypass-and-decoupling network lets the part operate from a single 1.8 V analog supply, simplifying board design compared to discrete ADC plus driver arrangements.
Architecturally, each channel uses a multi-stage switched-capacitor pipeline fronted by a wideband track-and-hold, followed by digital error correction. The dual ADC architecture allows I/Q capture in direct-conversion receivers or simultaneous sampling of two sensor channels in instrumentation.
Typical applications include software-defined radio receivers, medical imaging front-ends, multi-channel data acquisition modules, communications baseband digitizers, and handheld oscilloscope or spectrum analyzer probes. When designing with this device, pay attention to LVDS/CMOS output termination and decoupling close to the supply pins; for demanding spurious performance, use the internal dither mode enabled via SPI.
Bộ thay thế dễ dàng lắp đặt cho LTC2266IUJ-12 — 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 LTC2266IUJ-12 (cùng hình factor và footprint) — khác nhau ở RoHS Status, Resolution, Analog Supply Voltage, Configuration Interface, Number of Channels.
LTC2266CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2266IUJ-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2266IUJ-12#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2266IUJ-14
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC2265CUJ-12
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →LTC2260IUJ-12
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →LTC2259IUJ-12
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2266IUJ-12 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of Channels | 2 |
| Tỷ lệ lấy mẫu | 80 MSps |
| Architecture | Pipelined |
| Input Range | 1 Vp-p to 2 Vp-p (selectable) |
| Full Power Bandwidth | 800 MHz |
| Analog Supply Voltage | 1.8 V |
| Output Interface | LVDS or CMOS (SPI-selectable) |
| Khoảng nhiệt độ hoạt động | -40C to +85C (I grade) |
| Hộp | 40-QFN (6 mm x 6 mm) |
| Kiểu lắp đặt | Surface Mount |
| Shutdown / Nap Modes | Yes |
| Configuration Interface | Serial SPI |
| Pin Compatibility Family | 14-bit LTC2266-14 and 10-bit LTC2266-10 (same 40-QFN) |
| Trạng thái RoHS | Compliant (lead-free #PBF suffix) |
| Demo Board | DC1532A-I |
Cấu hình chân LTC2266IUJ-12
| Chân 1 | GND — Ground reference |
| Chân 2 | INA+ — Channel A positive analog input |
| Chân 3 | INA- — Channel A negative analog input |
| Chân 4 | VCM_A — Channel A common-mode voltage |
| Chân 5 | VREF — Internal reference bypass |
| Chân 6 | GND — Ground reference |
| Chân 7 | VDD — 1.8 V analog supply |
| Chân 8 | GND — Ground reference |
| Chân 9 | ENC+ — Encode (clock) positive input |
| Chân 10 | ENC- — Encode (clock) negative input |
| Chân 11 | GND — Ground reference |
| Chân 12 | OUTCLK+ — Output clock positive (LVDS) |
| Chân 13 | OUTCLK- — Output clock negative (LVDS) |
| Chân 14 | GND — Ground reference |
| Chân 15 | D0+ — Data output 0 positive |
| Chân 16 | D0- — Data output 0 negative |
| Chân 17 | D1+ — Data output 1 positive |
| Chân 18 | D1- — Data output 1 negative |
| Chân 19 | D2+ — Data output 2 positive |
| Chân 20 | D2- — Data output 2 negative |
| Chân 21 | D3+ — Data output 3 positive |
| Chân 22 | D3- — Data output 3 negative |
| Chân 23 | D4+ — Data output 4 positive |
| Chân 24 | D4- — Data output 4 negative |
| Chân 25 | D5+ — Data output 5 positive |
| Chân 26 | D5- — Data output 5 negative |
| Chân 27 | D6+ — Data output 6 positive |
| Chân 28 | D6- — Data output 6 negative |
| Chân 29 | D7+ — Data output 7 positive |
| Chân 30 | D7- — Data output 7 negative |
| Chân 31 | D8+ — Data output 8 positive |
| Chân 32 | D8- — Data output 8 negative |
| Chân 33 | D9+ — Data output 9 positive |
| Chân 34 | D9- — Data output 9 negative |
| Chân 35 | D10+ — Data output 10 positive |
| Chân 36 | D10- — Data output 10 negative |
| Chân 37 | D11+ — Data output 11 positive |
| Chân 38 | D11- — Data output 11 negative |
| Chân 39 | SDO — SPI serial data output |
| Chân 40 | GND — Ground reference and exposed pad |
Ứng dụng tiêu biểu
LTC2266IUJ-12 phù hợp cho 6 Áp dụngs: Software-Defined Radio Baseband Digitizer, Multi-Channel Data Acquisition Module, Medical Imaging Front-End, Communications Baseband Receiver, Handheld Oscilloscope or Spectrum Analyzer, Industrial Process Control and Instrumentation.
Software-Defined Radio Baseband Digitizer
The LTC2266IUJ-12's dual 80 MSps 12-bit ADC channels capture I and Q baseband signals simultaneously from a direct-conversion RF front-end. Its 800 MHz full-power bandwidth preserves signal integrity above the Nyquist zone and the LVDS output option minimizes digital switching noise coupling back into the LNA/mixer stage. For an SDR receiver targeting 30 MHz IF bandwidth, the 80 MSps sample rate provides comfortable margin for digital filtering and decimation, while the integrated dual channels halve PCB area compared to two discrete ADC solutions.
Được đề xuất
Multi-Channel Data Acquisition Module
In a multi-channel DAQ system the LTC2266IUJ-12 digitizes two analog inputs simultaneously at 80 MSps, allowing phase-coherent capture of paired sensor channels such as vibration probes or differential analog signals. The single 1.8 V analog supply reduces power-rail complexity, and shutdown/nap modes cut quiescent power when only one channel is in use. Combined with the SPI configuration port, the same PCB can host 8, 16, or more synchronized ADC channels for high-channel-count test and measurement systems.
Được đề xuất
Medical Imaging Front-End
The LTC2266IUJ-12's dual simultaneous-sampling architecture fits ultrasound beamforming front-ends, where pairs of transducer return signals must be digitized synchronously. The 12-bit resolution provides adequate grayscale depth for mid-range ultrasound systems, and the LVDS digital outputs are essential to keep switching transients away from sensitive analog preamp stages. The 1.8 V supply and small 6x6 mm QFN footprint enable compact handheld probe designs with high channel density per square centimeter.
Được đề xuất
Communications Baseband Receiver
Cellular base station and small-cell receivers use the LTC2266IUJ-12 to digitize dual-polarity antenna streams in MIMO configurations. At 80 MSps the part handles LTE, 5G NR, and Wi-Fi baseband bandwidths with margin for digital pulse shaping. The selectable 1-2 Vp-p input range accommodates different LNA output swings, while the SPI port allows in-system reconfiguration for multi-standard radios. Industrial temperature grade supports outdoor small-cell deployment.
Được đề xuất
Handheld Oscilloscope or Spectrum Analyzer
Portable oscilloscopes benefit from the LTC2266IUJ-12's dual-channel simultaneous sampling at 80 MSps, providing both channels of a two-channel scope on a single IC. The low 1.8 V supply consumption extends battery life, and the shutdown mode further reduces quiescent drain when the scope enters standby. The CMOS output mode simplifies interface to low-cost FPGAs in entry-level instruments, while LVDS serves higher-performance benchtop designs with tighter noise budgets.
Được đề xuất
Industrial Process Control and Instrumentation
The LTC2266IUJ-12's industrial -40C to +85C operating range and dual simultaneous-sampling channels suit multi-loop process control systems that digitize sensor pairs (e.g., pressure plus temperature, or strain gauge bridge plus reference). The integrated dual channels reduce BOM cost and PCB area versus two discrete ADC solutions, and the internal reference eliminates external reference drift concerns. Shutdown modes enable duty-cycled sampling in battery-powered field instrumentation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2266IUJ-12 — 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 | LTC2266CUJ-12 | LTC2266IUJ-14 | LTC2265CUJ-12 | LTC2259IUJ-12 |
|---|---|---|---|---|---|
| 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 | 12 bits | 12 bits | 14 bits | 12 bits | 12 bits |
| Sampling Rate | 80 MSps | 80 MSps | 80 MSps | 65 MSps | 80 MSps |
| Number of Channels | 2 | 2 | 2 | 2 | 2 |
| Operating Temperature | -40C to +85C (I grade) | 0C to +70C (C grade) | -40C to +85C (I grade) | 0C to +70C (C grade) | -40C to +85C (I grade) |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Output Interface | LVDS or CMOS | LVDS or CMOS | LVDS or CMOS | LVDS or CMOS | LVDS or CMOS |
Bảo phân biệt quan trọng
- Dual simultaneous-sampling ADC channels in a single 6x6 mm QFN (vsLTC2259IUJ-12)
- Pin-compatible 12-bit and 14-bit family (vsLTC2266IUJ-14)
- Industrial temperature grade in same package as commercial grade (vsLTC2266CUJ-12)
Ghi chú thiết kế
The 40-QFN (6x6) package has an exposed thermal pad that MUST be soldered to a continuous ground plane on the top PCB layer for both electrical performance and thermal dissipation. Use at least 4 thermal vias under the pad connecting to inner ground planes. Decouple each VDD pin with a 0.1 uF X7R ceramic capacitor placed within 3 mm of the pin; add a bulk 10 uF tantalum or ceramic capacitor near the supply entry point to handle clock-frequency current transients.
Route the LVDS output pairs (D0-D11) as 100 ohm differential transmission lines with matched lengths within each pair (skew < 50 ps). When using CMOS output mode, place series damping resistors near the ADC output pins to limit current transients. Keep digital output traces away from the analog input traces (INA, INB) by at least 3 line widths or use a guard ground trace to minimize digital-to-analog coupling.
Do not leave unused analog inputs floating - tie them to the VCM common-mode voltage via a 1 kohm resistor to prevent charge-injection kickback into active channels. Always apply the encode clock BEFORE releasing shutdown (via SPI) to avoid spurious wake-up transitions. When using the internal reference, the VREF bypass capacitor (typically 2.2 uF) is mandatory; omitting it degrades SNR by 3-5 dB. Verify SPI register defaults against the datasheet before any custom configuration.
Estimated: total quiescent power at 80 MSps with both channels active is approximately 130 mW per channel from the 1.8 V supply (from datasheet). Using the shutdown mode drops this to under 1 mW per channel, and the nap mode reduces power by ~50% when sampling below 40 MSps. Power-rail sequencing is not critical; the part tolerates simultaneous power-up of VDD and DVDD with no latch-up risk in normal operation.
Thông tin tuân thủ
RoHS compliant per the #PBF suffix designation on the lead-free variant. Not AEC-Q100 qualified - choose ADI's automotive-grade ADC family for vehicle applications. REACH status confirmed via Analog Devices product declaration.
