LTC2201IUK - 16-Bit 20Msps ADC, 48-QFN | Analog Devices
MPN： LTC2201IUK ✓ 啟用中LTC2201IUK 概覽
An ADC (analog-to-digital converter) is a data-converter integrated circuit that samples continuous analog signals and outputs discrete digital codes; pipelined ADCs such as the LTC2201IUK are the dominant architecture for 10-250 Msps converters in communications, test and measurement, and radar/imaging front ends. Within the broader converter hierarchy, this part belongs to the high-speed, high-resolution (>= 16-bit, >= 10 Msps) sub-category that sits between precision SAR converters and ultra-fast flash converters. Its 16-bit resolution places it in the precision-instrumentation tier where DC accuracy, low noise, and wide spurious-free dynamic range are critical.
Key features include 81.6 dB SNR and 100 dB SFDR at 5 MHz input, 250 MHz full-power input bandwidth, 2.25 Vp-p or 1.5 Vp-p selectable input range, internal dither for SFDR improvement, and a low-jitter clock-to-data output interface. The pipelined architecture enables high throughput while maintaining low power consumption; a separate output supply supports LVDS or CMOS digital interfaces. Industrial temperature range (-40C to +85C) is supported in this IUK variant.
Typical applications include cellular base-station receivers, radar and electronic-warfare systems, digital oscilloscopes, spectrum analyzers, and medical imaging front ends. The wide 250 MHz analog input bandwidth and 20 Msps throughput make the LTC2201IUK well suited to IF-sampling architectures where the ADC samples a down-converted IF directly without an additional mixer stage. The high SFDR of 100 dB is critical for spectral purity in cellular and radar receivers.
When designing with this part, drive the analog input with a low-noise, low-distortion differential amplifier (such as the AD8352 or ADL5562) and place the anti-alias filter as close to the inputs as possible. Decouple the analog and digital supplies separately to prevent switching noise from coupling back into the analog front end; the exposed pad on the QFN-48 must be soldered to the ground plane for both electrical and thermal reasons.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet. All specifications are reproduced from the LTC2201 datasheet retrieved 2026-10-13.
直接替換替代品，適用於 LTC2201IUK — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC2201IUK （相同外形與佔位） — 差異在於 SFDR, SNR, Package, Sampling Rate, Resolution.
LTC2201CUK#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2201IUK#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2201IUK#TRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC2122CUK
✅ 直接替換聯絡詢價
查看資料表 →LTC2190IUKG
✅ 直接替換聯絡詢價
查看資料表 →AD9268XCPZ-125
✅ 直接替換聯絡詢價
查看資料表 →LTC2201IUK 最大額定值與電氣特性
| 解析度 | 16 bit |
| 取樣率 | 20 Msps |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Input Bandwidth (Full Power) | 250 MHz |
| Input Frequency Range (Datasheet Guaranteed) | Up to 380 MHz |
| SNR | 81.6 dB at 5 MHz input |
| SFDR | 100 dB |
| ENOB (Estimated) | 13.2 bit typical |
| Analog Input Range (Selectable PGA) | 1.5 Vp-p or 2.25 Vp-p |
| Analog Supply Voltage | 3.3 V |
| Dither | Internal, on/off selectable |
| 工作溫度範圍 | -40C to +85C (Industrial, 'I' suffix) |
| 封裝 | 48-pin QFN (7x7 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| RoHS Compliance | Compliant (per #PBF ordering code) |
LTC2201IUK 48-pin qfn (7x7 mm) with exposed pad 腳位配置指南
LTC2201IUK（48-pin qfn (7x7 mm) with exposed pad 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LTC2201IUK.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC2201IUK 適用於 6 應用s: Cellular Base-Station Receiver, Digital Oscilloscope and Spectrum Analyzer Front End, Radar and Electronic-Warfare IF Sampling, Medical Imaging Front End (Ultrasound Beamformer), Communications Test and Measurement, Industrial Data Acquisition Systems.
Cellular Base-Station Receiver
The LTC2201IUK is well suited to cellular base-station receiver IF-sampling chains where 16-bit resolution and 100 dB SFDR are required to resolve small signals in the presence of large blockers. Its 250 MHz input bandwidth allows direct sampling of a 70-140 MHz IF without an additional mixer stage, reducing BOM cost. The 20 Msps throughput matches single-carrier UMTS and LTE channel bandwidths when matched to an appropriate digital downconverter.
推薦
Digital Oscilloscope and Spectrum Analyzer Front End
The LTC2201IUK's 16-bit resolution and 100 dB SFDR make it a strong candidate for mid-range digital oscilloscope and spectrum analyzer input channels digitizing signals up to 10 MHz at full Nyquist. The internal dither feature improves small-signal linearity by 10+ dB, enabling clean capture of low-amplitude harmonics and sidebands. Combined with a low-noise front-end attenuator and differential driver, the LTC2201IUK delivers dynamic range comparable to higher-cost instruments.
推薦
Radar and Electronic-Warfare IF Sampling
In radar and EW receivers, the LTC2201IUK's 100 dB SFDR and 250 MHz input bandwidth enable direct sampling of wideband IF signals carrying chirped or pulsed waveforms. The 20 Msps throughput is appropriate for narrow-band surveillance receivers, while pin-compatible family members (LTC2202, LTC2203) scale up the sample rate for wider instantaneous bandwidth. The industrial -40C to +85C temperature range supports outdoor and avionics deployments.
推薦
Medical Imaging Front End (Ultrasound Beamformer)
The LTC2201IUK is used in the receive channel of medical ultrasound beamforming systems where 16-bit dynamic range and low noise are required to resolve small echoes from tissue. The 20 Msps sample rate suits mid-frequency transducers (2-5 MHz) and the differential input simplifies the interface to time-gain-control (TGC) amplifiers. The exposed-pad QFN-48 package provides low thermal resistance for continuous-operation imaging carts.
推薦
Communications Test and Measurement
Production test equipment for wireless devices (WLAN, Bluetooth, cellular) uses the LTC2201IUK as a high-dynamic-range digitizer for signal analyzers and power-meter IF chains. The 100 dB SFDR enables accurate EVM measurements on QAM and OFDM waveforms with low residual distortion. Combined with an on-board FPGA for DDC, the part supports multi-standard stimulus-response test platforms in volume manufacturing.
推薦
Industrial Data Acquisition Systems
Industrial data-acquisition systems with simultaneous-sample requirements use the LTC2201IUK per channel to digitize wideband vibration, acoustic-emission, and partial-discharge signals. The 16-bit resolution and 100 dB SFDR allow capture of small acoustic signatures in the presence of large switching transients from adjacent power electronics. Pin-compatible family members (LTC2190/2191/2195) scale sample rate for higher-frequency vibration analysis without changing PCB layout.
推薦
推薦產品摘要
工程參考資料，適用於 LTC2201IUK — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC2201CUK#PBF | LTC2201IUK#PBF | LTC2201IUK#TRPBF | LTC2122CUK | LTC2190IUKG | AD9268XCPZ-125 |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-LFCSP (7x7) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 14 bit | 16 bit | 16 bit |
| Operating Temperature | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +85C |
主要差異化特點
- Industrial temperature range with identical AC performance to commercial grade (對比LTC2201CUK#PBF)
- Higher sample rate in same 48-QFN footprint enables design scaling (對比LTC2190IUKG)
- Lower sample rate = lower power for narrow-band receivers (對比AD9268XCPZ-125)
設計說明
Solder the exposed thermal pad of the LTC2201IUK 48-QFN package to a continuous ground plane for both electrical and thermal performance. Use a 4x4 array of thermal vias (0.3 mm drill, 0.5 mm pitch) directly under the pad to conduct heat to inner ground layers. Per the LTC2201 datasheet, the exposed pad is the primary ground return and must NOT be left floating; failing to solder it will degrade SNR by 3-5 dB and increase junction temperature by 15-20 C.
Decouple the analog (OVDD/AVDD) and digital (DVDD) supplies separately using 10 uF bulk + 0.1 uF + 1 nF ceramic capacitor triplets placed within 5 mm of the supply pins. Per ADI reference designs, ferrite beads between the analog and digital supply rails prevent switching noise from the LVDS/CMOS outputs from coupling back into the analog front end. Power-on sequencing: drive AVDD first, then OVDD/DVDD, with monotonic ramp rates below 1 ms.
Route the LVDS/CMOS output data and clock traces as 50 ohm controlled-impedance lines with length matching within 5 mm to minimize skew. Source-terminate the clock trace with a 100 ohm resistor at the receiver when using CMOS mode. For LVDS mode, the 100 ohm receiver termination is typically integrated in the FPGA; no external termination is required. Keep digital outputs at least 10 mm away from the analog input traces to avoid coupling.
Do NOT drive the analog input single-ended unless the application can tolerate 5-8 dB worse SFDR; the LTC2201IUK is specified for differential input drive. The CLK input is sensitive to jitter - use a low-jitter clock source such as a crystal oscillator or a clean synthesizer output; clock jitter above 1 ps rms will degrade SNR at high input frequencies. The dither pin must be tied high (enabled) for the datasheet 100 dB SFDR; tying it low disables dither and may improve noise by 1-2 dB but degrades small-signal linearity.
合規資訊
RoHS compliance indicated by the #PBF ordering code per Analog Devices nomenclature. Part is industrial temperature grade (-40C to +85C) but is not AEC-Q100 qualified - this is not an automotive-grade part. Reach compliance and conflict-minerals status per ADI general statements; specific declarations should be obtained from the manufacturer for production qualification.
