LTC2266CUJ-12 - 12-Bit 80Msps Dual ADC, 40-QFN | Analog Devices
MPN: LTC2266CUJ-12 ✓ Hoạt độngLTC2266CUJ-12 Tóm tắt
An ADC (analog-to-digital converter) is a data converter integrated circuit that translates continuous analog voltage levels into discrete digital codes, sitting at the boundary between the analog signal chain and the digital processing domain. Within the broader semiconductor taxonomy, the LTC2266CUJ-12 is a successive-approximation/pipelined ADC -> ADC -> data converter IC -> integrated circuit. Pipelined ADCs are the dominant architecture for sampling rates from ~10 Msps to several hundred Msps, offering the best trade-off between speed, resolution, and power dissipation for communications, imaging, and test-and-measurement front ends.
Key features of the LTC2266CUJ-12 include 12-bit resolution, 80 Msps sample rate, two matched ADC channels, 800 MHz full-power bandwidth, low power dissipation, SPI-port configurable modes, shutdown and nap power-down modes, and pin compatibility with the 14-bit LTC2266-14 and LTC2261-14 family. The dual-channel integration halves board area versus two discrete single-channel ADCs and eliminates the channel-to-channel skew inherent in time-interleaved solutions.
The pipelined architecture uses multi-bit/stage gain stages with digital error correction, delivering excellent spurious-free dynamic range (SFDR) and signal-to-noise ratio (SNR) while keeping per-channel power below 100 mW typical. Internal references and a low-jitter clock buffer reduce external component count, and the SPI port allows runtime configuration of input range, output data format, and power modes.
Typical applications include communications baseband and IF digitizers, medical imaging receivers, portable and battery-powered test equipment, multi-channel data acquisition systems, and diversity radio receivers. The dual channel also makes it well-suited to I/Q demodulation in direct-conversion receivers.
When designing with the LTC2266CUJ-12, pay attention to analog input drive network (transformer or active driver), low-jitter clock source, and decoupling at each supply pin. The exposed pad (EP) must be soldered to a continuous ground plane to meet the rated thermal performance; the SPI pins are 1.8V-3.3V logic and require level shifting on hosts that run above 3.3V.
This page synthesizes Analog Devices datasheet specifications, distributor pricing tiers, drop-in compatible alternatives, and PCB design notes not bundled in the manufacturer datasheet. All values are anchored to distributor data as of 2026-10-13.
Bộ thay thế dễ dàng lắp đặt cho LTC2266CUJ-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 LTC2266CUJ-12 (cùng hình factor và footprint) — khác nhau ở RoHS Status, Resolution, Package, Operating Temperature, Output Interface.
LTC2266IUJ-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2266CUJ-12#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2265CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2263CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2260CUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2258CUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2266CUJ-12 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Tỷ lệ lấy mẫu | 80 Msps |
| Architecture | Pipelined |
| Input Range | 1 Vp-p to 2 Vp-p (selectable) |
| Full-Power Input Bandwidth | 800 MHz |
| Analog Supply Voltage | 1.8 V |
| Digital Supply Voltage | 1.8 V |
| Hộp | 40-pin QFN (6 mm x 6 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | 0 C to +70 C (commercial) |
| Configuration Interface | Serial SPI port |
| Power-Saving Modes | Shutdown and Nap modes |
| Pin-Compatible Family | 14-bit LTC2266-14 and LTC2261-14 |
| Trạng thái RoHS | Compliant (PBF suffix) |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
Cấu hình chân LTC2266CUJ-12
| Chân 1 | INA+ — Channel A positive analog input |
| Chân 2 | INA- — Channel A negative analog input |
| Chân 3 | GND — Analog ground reference |
| Chân 4 | VCM — Common-mode voltage output |
| Chân 5 | INB+ — Channel B positive analog input |
| Chân 6 | INB- — Channel B negative analog input |
| Chân 7 | GND — Analog ground reference |
| Chân 8 | REF — Reference voltage pin |
| Chân 9 | GND — Analog ground reference |
| Chân 10 | VDD — 1.8 V analog supply |
| Chân 11 | GND — Analog ground reference |
| Chân 12 | ENC+ — Encode clock positive input |
| Chân 13 | ENC- — Encode clock negative input (complementary) |
| Chân 14 | GND — Clock ground reference |
| Chân 15 | OVDD — 1.8 V to 3.3 V output driver supply |
| Chân 16 | D0A — Channel A data output bit 0 (LSB) |
| Chân 17 | D1A — Channel A data output bit 1 |
| Chân 18 | D2A — Channel A data output bit 2 |
| Chân 19 | D3A — Channel A data output bit 3 |
| Chân 20 | D4A — Channel A data output bit 4 |
| Chân 21 | D5A — Channel A data output bit 5 |
| Chân 22 | D6A — Channel A data output bit 6 |
| Chân 23 | D7A — Channel A data output bit 7 |
| Chân 24 | D8A — Channel A data output bit 8 |
| Chân 25 | D9A — Channel A data output bit 9 |
| Chân 26 | D10A — Channel A data output bit 10 |
| Chân 27 | D11A — Channel A data output bit 11 (MSB) |
| Chân 28 | D0B — Channel B data output bit 0 (LSB) |
| Chân 29 | D1B — Channel B data output bit 1 |
| Chân 30 | D2B — Channel B data output bit 2 |
| Chân 31 | D3B — Channel B data output bit 3 |
| Chân 32 | D4B — Channel B data output bit 4 |
| Chân 33 | D5B — Channel B data output bit 5 |
| Chân 34 | D6B — Channel B data output bit 6 |
| Chân 35 | D7B — Channel B data output bit 7 |
| Chân 36 | D8B — Channel B data output bit 8 |
| Chân 37 | D9B — Channel B data output bit 9 |
| Chân 38 | D10B — Channel B data output bit 10 |
| Chân 39 | D11B — Channel B data output bit 11 (MSB) |
| Chân 40 | CS — SPI chip select / configuration (also serves as OF pin per family) |
| Chân EP | EP — Exposed pad - must be soldered to analog ground for thermal dissipation |
Ứng dụng tiêu biểu
LTC2266CUJ-12 phù hợp cho 6 Áp dụngs: Communications IF/Baseband Digitizer, Medical Imaging Receiver, Portable Test and Measurement, Multi-Channel Data Acquisition, Diversity Radio Receiver, Industrial Process Control.
Communications IF/Baseband Digitizer
The LTC2266CUJ-12 fits communications IF/baseband digitizers because its 12-bit resolution at 80 Msps captures 30+ MHz of signal bandwidth per channel with the 800 MHz full-power input bandwidth enabling direct IF undersampling. Dual matched channels simplify I/Q digitization in direct-conversion receivers, while the SPI port lets the baseband processor reconfigure input range at runtime. Power dissipation stays below 100 mW per channel, easing thermal design in compact radio modules.
Được đề xuất
Medical Imaging Receiver
The LTC2266CUJ-12 is suitable for medical imaging receiver front ends such as ultrasound beamformers and portable patient monitors, where its dual-channel integration reduces board area and channel-to-channel skew versus two discrete ADCs. The 12-bit resolution at 80 Msps is sufficient for mid-tier ultrasound channels, and the Nap/Shutdown modes extend battery life in portable carts. Pin compatibility with the 14-bit LTC2266-14 family provides a clear upgrade path to higher-resolution systems.
Được đề xuất
Portable Test and Measurement
The LTC2266CUJ-12 is well-matched to portable oscilloscope and spectrum analyzer front ends, where its 80 Msps sample rate and 800 MHz input bandwidth capture fast transients while keeping per-channel power low enough for handheld battery operation. The Shutdown and Nap modes can drop quiescent draw during standby, and the SPI port enables auto-ranging input stages. The 40-QFN (6x6 mm) footprint is small enough for dense multi-channel front-end cards.
Được đề xuất
Multi-Channel Data Acquisition
The LTC2266CUJ-12 fits multi-channel data acquisition systems where simultaneous sampling of two signals is required, such as vibration analysis, phase measurement, and quadrature demodulation. Two matched ADCs sharing a single clock eliminate inter-channel skew, and the 12-bit resolution is sufficient for many industrial control loops. The 40-QFN package supports dense PCB layouts and exposes a ground pad for thermal management.
Được đề xuất
Diversity Radio Receiver
The LTC2266CUJ-12 is ideal for diversity radio receiver chains, where two matched ADCs simultaneously digitize the main and antenna-diversity paths for maximum-ratio combining in the baseband processor. The 800 MHz full-power input bandwidth permits direct digitization of L-band or S-band IFs, eliminating a down-conversion stage. The 12-bit resolution at 80 Msps comfortably captures the channel bandwidth for Wi-Fi, LTE, and proprietary narrowband protocols.
Được đề xuất
Industrial Process Control
The LTC2266CUJ-12 (and its industrial-grade LTC2266IUJ-12 sibling) is suited to industrial process control loops requiring simultaneous sampling of two sensor channels, such as pressure transducers, strain gauges, and three-phase current monitors. Pin compatibility with the 14-bit LTC2266-14 family provides a roadmap to higher precision without PCB redesign. The 40-QFN (6x6 mm) package and 1.8 V supply simplify integration into 3.3 V and 5 V mixed-voltage systems with level shifters.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2266CUJ-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 | LTC2266IUJ-12#PBF | LTC2266CUJ-12#TRPBF | LTC2265CUJ-12 | LTC2263CUJ-12 | LTC2260CUJ-14 |
|---|---|---|---|---|---|---|
| Package | 40-QFN (6x6) | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same | 40-QFN (6x6) - same family |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit | 12 bit |
| Sample Rate | 80 Msps | 80 Msps | 65 Msps | 25 Msps | 105 Msps | 65 Msps |
| Number of Channels | 2 | 2 | 2 | 2 | 1 | 2 |
| Input Bandwidth | 800 MHz | 800 MHz | 800 MHz | 800 MHz | 800 MHz | 750 MHz |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) |
| Supply Voltage | 1.8 V analog, 1.8 V digital, 1.8-3.3 V OVDD | 1.8 V / 1.8-3.3 V | 1.8 V / 1.8-3.3 V | 1.8 V / 1.8-3.3 V | 1.8 V / 1.8-3.3 V | 1.8 V / 1.8-3.3 V |
Bảo phân biệt quan trọng
- Dual matched channels on a single chip (vsLTC2260CUJ-14)
- Industrial-temp drop-in option (vsLTC2265CUJ-12)
- Wide 800 MHz analog input bandwidth (vsLTC2263CUJ-12)
Ghi chú thiết kế
Solder the exposed pad (EP) of the 40-QFN package to a continuous analog ground plane using an array of thermal vias to meet rated thermal performance. Place input capacitors, common-mode bypass, and reference decoupling within 2-3 mm of the respective pins, and split analog and digital ground planes only at the EP under the device. This minimizes return-path inductance and preserves SNR/SFDR at 80 Msps.
Drive the ENC+/ENC- differential encode clock from a low-jitter clock source (jitter < 200 fs rms); signal-to-noise ratio at 80 Msps is highly sensitive to sample-clock jitter. Use a clock buffer/transformer (e.g., ETC1-1-13) if a single-ended CMOS clock must be converted to differential. Skew between ENC+ and ENC- directly translates to aperture error in the on-chip S/H, so route them as a length-matched pair.
Use separate LDOs (e.g., LT3042, LT3010) for the 1.8 V analog (VDD) and digital (OVDD) rails, with pi-filter networks to isolate switching noise from sensitive analog circuitry. Decouple each VDD pin with a 10 uF ceramic + 0.1 uF X7R in parallel, placed within 1 mm of the pin. The shutdown mode drops quiescent current to microampere levels - assert it when the host is not actively sampling.
Thông tin tuân thủ
RoHS compliance confirmed by the #PBF suffix per Analog Devices / Linear Technology product marking. The 'C' in LTC2266CUJ-12 denotes the commercial 0C to +70C temperature grade; the IUJ-12 variant is industrial. No AEC-Q100 grade is offered for this family.
