LTC2207CUK-14 - 14-Bit, 105Msps ADC | Analog Devices
MPN: LTC2207CUK-14 ✓ Hoạt độngLTC2207CUK-14 Tóm tắt
A pipelined ADC is a high-speed converter architecture that uses multiple cascaded low-resolution stages to achieve both high sample rates and high resolution. The LTC2200 family occupies the converter IC node in the signal chain hierarchy: analog front-end -> variable gain amplifier -> ADC -> digital signal processor -> FPGA/ASIC. Compared to successive-approximation-register (SAR) ADCs, pipelined parts deliver sample rates above 50 Msps at the cost of a fixed conversion latency, making them standard for software-defined radio, cable infrastructure, and radar digitizers.
Key features include a 105 Msps sample rate, 14-bit resolution, 77.3 dB SNR, 98 dB SFDR, and an internal bandgap reference. The PGA front end allows the input range to be optimized for either maximum dynamic range or maximum SNR, and the CMOS-compatible outputs can interface directly to FPGAs or ASICs without level translation. The exposed-pad QFN-48 package provides a low thermal resistance path to PCB copper, allowing continuous 105 Msps operation without additional heatsinking.
Typical applications include cellular base-station receivers, software-defined radio, cable modem termination systems, test and measurement instrumentation, and radar/sonar signal processing. The wide input bandwidth supports direct IF sampling, eliminating the need for an analog downconversion stage in many communications receivers.
When designing with this device, dedicate a continuous ground plane on layer 2 beneath the QFN exposed pad and stitch vias to the inner ground plane to achieve the specified 98 dB SFDR. Decouple AVDD33, DVDD, and OV_DD separately with 0.1 uF ceramic capacitors within 100 mils of the supply pins, and route the 105 MHz DDR clock trace with controlled 50 ohm impedance and length matching to within 50 ps of the data bit lanes.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the LTC2207/LTC2206 ADC family, and practical PCB layout notes that complement the manufacturer datasheet's numerical and engineering specifications.
Bộ thay thế dễ dàng lắp đặt cho LTC2207CUK-14 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
LTC2207IUK-14
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2207IUK-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2206CUK-14
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2205CUK-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2206IUK-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2207CUK-14 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14-bit |
| Sample Rate | 105 Msps |
| Architecture | Pipelined |
| Number of Channels | 1 |
| Input Type | Differential (PGA front end) |
| Input Frequency Range | Up to 700 MHz |
| SNR | 77.3 dB |
| SFDR | 98 dB |
| Output Interface | Parallel CMOS, DDR |
| Hộp | 48-pin QFN (7x7 mm) with exposed pad |
| Khoảng nhiệt độ hoạt động | 0C to +70C (Commercial) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (PBF suffix) |
| Screening Level | Commercial |
Cấu hình chân LTC2207CUK-14
| Chân 1 | AIN+ — Differential analog input (positive) |
| Chân 2 | AIN- — Differential analog input (negative) |
| Chân 3 | SENSE — Reference mode select (internal vs external) |
| Chân 4 | GND — Analog ground |
| Chân 5 | VREF — Reference voltage bypass |
| Chân 6 | REFT — Reference top decoupling |
| Chân 7 | REFB — Reference bottom decoupling |
| Chân 8 | CMODE — Common-mode voltage bypass |
| Chân 9 | AVDD33 — Analog 3.3 V supply |
| Chân 10 | AVDD33 — Analog 3.3 V supply |
| Chân 11 | GND — Analog ground |
| Chân 12 | OGND — Output driver ground |
| Chân 13 | OV_DD — Output driver supply |
| Chân 14 | D0 — CMOS data output bit 0 (LSB) |
| Chân 15 | D1 — CMOS data output bit 1 |
| Chân 16 | D2 — CMOS data output bit 2 |
| Chân 17 | D3 — CMOS data output bit 3 |
| Chân 18 | D4 — CMOS data output bit 4 |
| Chân 19 | D5 — CMOS data output bit 5 |
| Chân 20 | D6 — CMOS data output bit 6 |
| Chân 21 | D7 — CMOS data output bit 7 |
| Chân 22 | D8 — CMOS data output bit 8 |
| Chân 23 | D9 — CMOS data output bit 9 |
| Chân 24 | D10 — CMOS data output bit 10 |
| Chân 25 | D11 — CMOS data output bit 11 |
| Chân 26 | D12 — CMOS data output bit 12 |
| Chân 27 | D13 — CMOS data output bit 13 (MSB) |
| Chân 28 | DRO — Data ready output (clock-domain indicator) |
| Chân 29 | OF — Overflow flag output |
| Chân 30 | OGND — Output driver ground |
| Chân 31 | OV_DD — Output driver supply |
| Chân 32 | NC — Not connected (per datasheet) |
| Chân 33 | CS — Chip select (active low) |
| Chân 34 | SHDN — Shutdown (active low) |
| Chân 35 | MODE — Output mode select (CMOS/LVDS) |
| Chân 36 | GND — Digital ground |
| Chân 37 | DVDD — Digital 1.8/2.5 V supply |
| Chân 38 | GND — Digital ground |
| Chân 39 | ENC+ — Encode clock input (positive) |
| Chân 40 | ENC- — Encode clock input (negative) |
| Chân 41 | ENC_GND — Encode clock ground |
| Chân 42 | GND — Clock ground |
| Chân 43 | AVDD33 — Analog 3.3 V supply |
| Chân 44 | GND — Analog ground |
| Chân 45 | PGA — PGA front-end bypass |
| Chân 46 | PGA — PGA front-end bypass |
| Chân 47 | BIAS — Bias current setting |
| Chân 48 | GND — Analog ground |
Ứng dụng tiêu biểu
LTC2207CUK-14 phù hợp cho 6 Áp dụngs: Cellular Base-Station Receiver, Software Defined Radio (SDR), Cable Modem Termination System (CMTS), Radar and Sonar Signal Processing, Test and Measurement Instrumentation, Medical Imaging Ultrasound Receiver.
Cellular Base-Station Receiver
The LTC2207CUK-14's 105 Msps sample rate and 700 MHz input bandwidth enable direct IF sampling of cellular base-station signals at intermediate frequencies up to 70 MHz, eliminating a downconversion stage. With 77.3 dB SNR and 98 dB SFDR, it digitizes WCDMA and LTE signals with sufficient dynamic range to resolve adjacent-channel blockers. Place the part adjacent to the RF front-end mixer output and clock it from a low-jitter PLL to preserve SNR; use LVDS-like controlled-impedance traces and matched-length DDR clock-to-data routing to capture the full 105 Msps throughput.
Được đề xuất
Software Defined Radio (SDR)
The LTC2207CUK-14's 14-bit resolution at 105 Msps suits wideband SDR receivers digitizing HF through microwave bands. Direct sampling of 0-70 MHz intermediate outputs preserves dynamic range for software demodulation of multiple waveforms. The PGA front end scales the input range to maximize SNR for weak amateur-radio or tactical-radio signals. Use the part in conjunction with an FPGA such as a Xilinx Kintex or Altera Cyclone that captures the parallel CMOS/DDR data and performs channelization in DSP fabric.
Được đề xuất
Cable Modem Termination System (CMTS)
The LTC2207CUK-14's 98 dB SFDR allows digitizing full-bandwidth downstream cable modem channels (54-1000 MHz translated to IF) without intermodulation spurs. DOCSIS 3.0/3.1 head-end receivers demanding 14-bit linearity and 105 Msps capture the part. The single-channel differential input pairs cleanly with an upstream gain block; the CMOS output drives directly into an FPGA deserializer that performs upstream channelization and demodulation. Document selection notes: matched impedance routing is critical for 100 MHz bandwidth paths.
Được đề xuất
Radar and Sonar Signal Processing
The LTC2207CUK-14's wide analog input bandwidth (700 MHz) and 14-bit resolution capture pulsed-Doppler radar IF returns with adequate range resolution and dynamic range. Synchronous sampling at 105 Msps preserves phase information across the radar PRT, enabling coherent integration across multiple pulses. For sonar arrays, multiple 14-bit output lanes feed into beamforming FPGA logic that combines hydrophone channels. Plan PCB layout carefully: continuous ground beneath the exposed pad, separate analog/digital supply domains, and matched-length clock-to-data traces within 50 ps.
Được đề xuất
Test and Measurement Instrumentation
The LTC2207CUK-14's 77.3 dB SNR and 98 dB SFDR suit high-end oscilloscope and spectrum analyzer front-end channels. The 14-bit/105 Msps combination captures transient waveforms with 9.5 ns resolution and dynamic range sufficient for spectrum analysis up to 70 MHz. Use the part on the acquisition board of a digitizer card; the FPGA behind it performs waveform averaging and FFT processing. Document critical behavior: maintain SFDR anti-alias filtering; use the on-chip internal reference or an external low-noise reference for best DC accuracy.
Được đề xuất
Medical Imaging Ultrasound Receiver
The LTC2207CUK-14's single-channel, 14-bit, 105 Msps pipeline architecture enables beamformer-channel ultrasound receiver designs. Direct sampling of RF echo signals at intermediate frequencies preserves amplitude information for tissue characterization algorithms. With 77.3 dB SNR, the part captures small echoes from deep tissue without quantization-noise masking. Use the part in conjunction with a high-density FPGA that aggregates 32-128 parallel receive channels. Document PCB layout critical: matched-length routing and continuous ground plane for noise immunity.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2207CUK-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 | LTC2207IUK-14 | LTC2207IUK-14#PBF | LTC2206CUK-14 | LTC2205CUK-14 | LTC2206IUK-14#PBF |
|---|---|---|---|---|---|---|
| Package | QFN-48 (7x7 mm) | QFN-48 (7x7) - same | QFN-48 (7x7) - same | QFN-48 (7x7) - same | QFN-48 (7x7) - same | QFN-48 (7x7) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Sample Rate | 105 Msps | 105 Msps | 105 Msps | 80 Msps | 65 Msps | 80 Msps |
| Resolution | 14-bit | 14-bit | 14-bit | 14-bit | 14-bit | 14-bit |
| Temperature Grade | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C |
| Lead-Free/RoHS | Standard (PBF variant for RoHS) | Standard (PBF variant for RoHS) | Lead-free/RoHS (PBF suffix) | Standard (PBF variant for RoHS) | Standard (PBF variant for RoHS) | Lead-free/RoHS (PBF suffix) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Output Type | Parallel CMOS, DDR | Parallel CMOS, DDR | Parallel CMOS, DDR | Parallel CMOS, DDR | Parallel CMOS, DDR | Parallel CMOS, DDR |
Bảo phân biệt quan trọng
- Highest sample rate in the LTC2206/LTC2207 14-bit QFN-48 family (vsLTC2206CUK-14)
- Commercial-grade pricing (vsLTC2207IUK-14)
- Highest SFDR in the family for spectral-purity applications (vsLTC2205CUK-14)
Ghi chú thiết kế
Estimated: at 105 Msps, the LTC2207CUK-14's parallel CMOS DDR data outputs toggle at 210 MHz edges. Route the 14 data lanes (D0-D13), DRO, OF, and the encode clock pair (ENC+/ENC-) on the top layer with 50 ohm controlled impedance and length-matched within +/- 50 ps. Place the part adjacent to its companion FPGA on the same side of the PCB, and avoid routing any analog input traces across the digital output bus on inner layers.
Estimated: at full 105 Msps, the LTC2207CUK-14 draws approximately 230 mA from AVDD33 plus 50 mA from DVDD and OV_DD combined. Decouple AVDD33 with one 10 uF bulk cap and three 0.1 uF ceramics within 100 mils of each analog supply pin; isolate the analog and digital ground returns and join them only at the exposed pad. Use a ferrite bead on DVDD when the part shares a 3.3 V rail with other components to prevent digital switching noise coupling back into AVDD33.
Always specify the PBF (lead-free) suffix variant for new RoHS-compliant designs; the standard LTC2207CUK-14 may have SnPb lead finish that conflicts with lead-free assembly. Per the Analog Devices datasheet, the part supports both commercial (CUK) and industrial (IUK) temperature grades; do not substitute an IUK part on a board designed around CUK thermal envelopes without re-checking cold-start behavior. Avoid using the part with sample rates above 105 Msps - the on-chip PGA front end will introduce distortion.
Solder the exposed pad (EP) of the QFN-48 directly to a continuous ground plane on layer 2 with a via array (recommended 4x4 = 16 vias, 0.3 mm drill). Stitch the analog and digital grounds together only at this exposed pad to provide a single-star reference. Keep the input network (anti-alias filter and PGA bypass caps) within 50 mils of pins 1-8; keep the digital output bus (D0-D13, DRO, OF) clear of the analog input traces. Maintain 50 ohm termination on the ENC+/ENC- clock pair.
Thông tin tuân thủ
Per the Analog Devices LTC2207/LTC2206 datasheet, the PBF suffix variant is lead-free/RoHS-compliant. The standard CUK package is commercial-temperature grade; the IUK suffix is the industrial variant. AEC-Q100 qualification status: not specifically listed - not recommended for automotive safety-critical applications.
