LTC2272IUJ - 16-Bit 65Msps JESD204 Serial ADC | Analog Devices
MPN: LTC2272IUJ ✓ Hoạt độngLTC2272IUJ Tóm tắt
A pipelined ADC (pipelined analog-to-digital converter) is a multi-stage converter architecture that achieves high sampling rates by cascading many low-resolution flash stages with sample-and-hold amplifiers between them; this family (LTC2273/LTC2272) targets demanding communications and instrumentation applications. Within the broader taxonomy, the LTC2272IUJ belongs to: pipelined ADC -> ADC -> data converter -> mixed-signal IC -> integrated circuit. Each conversion stage delivers sub-ADC residue bits that are recombined with a digital correction engine to produce the final 16-bit code.
Key features include a programmable-gain amplifier (PGA) front end that scales the differential analog input full-scale range, an input bandwidth of 700 MHz that supports undersampling of IF signals well above Nyquist, and the JEDEC JESD204 serial interface specification for data converters that reduces board routing and isolates noisy digital outputs from sensitive analog circuits. The serialized LVDS-style outputs also simplify PCB layout and enable smaller package footprints compared to parallel-output ADCs.
Typical applications include high-performance communications receivers, broadband instrumentation, software-defined radio (SDR) front ends, IF digitization in cellular base stations, and radar/EW signal chains. The 700 MHz input bandwidth makes the LTC2272IUJ well suited for undersampling intermediate-frequency signals in multi-carrier transceiver systems, while the JESD204 output keeps the FPGA or ASIC interface compact.
A key design consideration is the JESD204 link establishment: the host FPGA must be programmed with the correct LMF parameters, and the LTC2272IUJ must be supplied with a stable reference voltage (internal or external). For best noise performance, place the analog input capacitors, common-mode voltage bypass, and the 1.8 V analog supply decoupling within a few millimetres of the device, and isolate the analog and digital ground planes under the QFN thermal pad.
This page synthesizes distributor pricing, drop-in alternative ADCs (LTC2273, LTC2272-12), and practical JESD204 layout notes not found on the manufacturer product page alone.
Bộ thay thế dễ dàng lắp đặt cho LTC2272IUJ — 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 LTC2272IUJ (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Output Interface, Number of Channels, Operating Temperature Range.
LTC2273IUJ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2272IUJ#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2258IUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2267IUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2263IUJ-14
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2272IUJ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bit |
| Number of Channels | 1 |
| Architecture | Pipelined |
| Sample Rate (LTC2272) | 65 Msps |
| Sample Rate (LTC2273) | 80 Msps |
| Input Bandwidth | 700 MHz |
| Input Type | Differential |
| Output Interface | JESD204 (serial, JEDEC data-converter spec) |
| PGA Front End | Programmable gain, optimizes input range |
| Analog Supply | 1.8 V |
| Digital Supply | 1.8 V |
| Hộp | 40-QFN (IUJ), 6 x 6 mm, no-lead HVQCCN |
| Terminal Form | No Lead (HVQCCN) |
| Number of Terminals | 40 |
| Operating Temperature Grade | Industrial (I suffix) |
| Output Isolation | Serial JESD204 isolates analog from noisy digital logic |
Hướng dẫn cấu hình chân LTC2272IUJ 40-qfn (iuj), 6 x 6 mm, no-lead hvqccn
Cấu hình chân cho LTC2272IUJ (40-qfn (iuj), 6 x 6 mm, no-lead hvqccn gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LTC2272IUJ.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LTC2272IUJ phù hợp cho 6 Áp dụngs: Communications Receiver IF Digitization, Broadband Test & Measurement Instrumentation, Software Defined Radio (SDR) Front End, Radar and Electronic Warfare Signal Chain, Medical Ultrasound Beamforming Receiver, Industrial Vibration & Acoustic Monitoring.
Communications Receiver IF Digitization
The LTC2272IUJ digitizes intermediate-frequency (IF) signals in cellular base-station and microwave-link receivers. Its 700 MHz input bandwidth supports undersampling of IF carriers well above the 32.5 MHz Nyquist, while the 65 Msps sample rate cleanly captures multi-carrier GSM/LTE signals. Placed between the mixer IF stage and the FPGA, the LTC2272IUJ's JESD204 output keeps the digital bus off the analog PCB region, reducing spurs that would otherwise degrade receiver SNR. Pin-compatible substitution with LTC2273IUJ lets designers trade 15 Msps of headroom for system margin.
Được đề xuất
Broadband Test & Measurement Instrumentation
The LTC2272IUJ is a strong fit for high-bandwidth oscilloscope and spectrum-analyzer front ends. Its 16-bit resolution preserves dynamic range while the 700 MHz input bandwidth captures fast transient events without an external track-and-hold. The JESD204 serial interface routes converted data into an FPGA DSP block that performs FFT and decimation, simplifying multi-channel scaling. The 40-QFN 6x6 mm IUJ footprint also enables dense channel-per-board layouts in modular instruments.
Được đề xuất
Software Defined Radio (SDR) Front End
The LTC2272IUJ serves as the wideband digitizer in software-defined radio platforms. Its 700 MHz analog input bandwidth handles HF/VHF/UHF bands directly, while the JESD204 link feeds the FPGA where channel filtering, demodulation, and decoding are software-defined. The single 1.8 V supply simplifies power-rail design for battery and portable SDR platforms. Choose the LTC2273IUJ drop-in if the application requires 80 Msps coverage of wider instantaneous bandwidths.
Được đề xuất
Radar and Electronic Warfare Signal Chain
The LTC2272IUJ's wide analog input bandwidth makes it suitable for radar IF and EW receivers that need high spurious-free dynamic range. At 65 Msps the LTC2272IUJ captures pulsed-Doppler and chirp radar signals while the JESD204 output minimizes digital crosstalk in the dense RF+digital PCB. Designers can pin-swap to the LTC2273IUJ (80 Msps) for wider instantaneous bandwidth EW receivers. Industrial-grade temperature range supports defense and aerospace environments.
Được đề xuất
Medical Ultrasound Beamforming Receiver
The LTC2272IUJ fits portable and cart-based ultrasound systems that digitize at channel rates beyond 40 Msps. The 16-bit dynamic range captures subtle echo amplitude differences across tissues, while the JESD204 serial link reduces the FPGA pin count in multi-channel transducers. Industrial temperature grading supports hospital and point-of-care environments. The same QFN footprint across the LTC2272/LTC2273 family enables a single PCB layout to serve multiple product tiers.
Được đề xuất
Industrial Vibration & Acoustic Monitoring
The LTC2272IUJ's 700 MHz analog input bandwidth and 16-bit resolution are well matched to high-frequency vibration, acoustic-emission, and condition-monitoring sensors. Oversampling at 65 Msps yields high ENOB at low IF, while the JESD204 interface cleanly transports data into industrial-grade FPGAs or SoCs. The industrial temperature range (I suffix) supports factory-floor deployments. Designers needing slightly lower power may consider the LTC2272IUJ#PBF lead-free RoHS variant.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2272IUJ — 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 | LTC2273IUJ | LTC2258IUJ-14 | LTC2267IUJ-14 |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 40-QFN (IUJ), 6x6 mm | 40-QFN (IUJ), 6x6 mm - same | 40-QFN (IUJ), 6x6 mm - same | 40-QFN (IUJ), 6x6 mm - same |
| Resolution | 16 bit | 16 bit | 14 bit | 14 bit |
| Sample Rate | 65 Msps | 80 Msps | 65 Msps | 105 Msps |
| Output Interface | JESD204 serial | JESD204 serial | Parallel LVDS | Parallel LVDS |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
Bảo phân biệt quan trọng
- Pin-compatible 80 Msps upgrade path (vsLTC2273IUJ)
- Highest resolution in the 40-QFN IUJ family (vsLTC2258IUJ-14)
- JESD204 reduces FPGA pin count (vsLTC2267IUJ-14)
Ghi chú thiết kế
The JESD204 serial differential output pairs of the LTC2272IUJ must be routed as 100-ohm differential microstrip or stripline with matched lengths (typically within 5 mils) to avoid corrupting the link eye. Keep the analog input traces and the digital JESD204 lines on opposite sides of the QFN thermal pad to prevent digital noise coupling into the analog front end. According to Analog Devices datasheet 22732fa, the exposed pad must be soldered to a continuous ground plane for thermal dissipation and electrical reference.
Provide separate 1.8 V analog (AVDD) and 1.8 V digital (DVDD) supplies to the LTC2272IUJ, each decoupled with 10 uF bulk and 0.1 uF + 1 nF ceramic capacitors within 2 mm of the supply pins. Place ferrite beads between AVDD and DVDD domains to suppress digital switching noise. Power-rail sequencing requirements are described in the Analog Devices datasheet 22732fa; violation can cause latch-up or JESD204 link initialization failure.
Avoid driving the LTC2272IUJ analog input with single-ended signals - the datasheet specifies differential drive for rated performance. A common-mode voltage near midscale (typically 0.9 V) must be established at the input pins via the internal PGA; failure to provide it causes degraded SFDR and apparent gain errors. Also, the JESD204 LMF parameters must match between the ADC and the FPGA/ASIC receiver; mismatched L/M/F values are the most common cause of link establishment failure on first bring-up.
The 40-QFN IUJ package dissipates [DATA_NEEDED: total power at 65 Msps] at full sample rate, mostly from the LVDS-style output drivers. In enclosed industrial enclosures with low airflow, attach the exposed pad to at least 1 square inch of inner-layer copper ground pour to keep junction temperature below the 125 C industrial limit. Estimated: with theta_JA of approximately 38 C/W on a 4-layer JEDEC test board, 1 W dissipation yields 38 C rise above ambient.
Thông tin tuân thủ
Lead-free RoHS-compliant per #PBF suffix designation on DigiKey/Mouser listings. Industrial temperature grade (-40C to +85C) per I suffix. AEC-Q100 qualification not listed; not intended for automotive safety-critical applications.
