LTC2274CUJ - 16-Bit 105Msps JESD204 Serial ADC | Analog Devices
料号： LTC2274CUJ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.65 | $346.50 |
| 100 | $30.8 | $3,080.00 |
| 500 | $27.5 | $13,750.00 |
| 1,000 | $24.95 | $24,950.00 |
LTC2274CUJ 概述
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog waveforms and outputs discrete digital codes at a sample clock rate. The 16-bit resolution places the LTC2274 in the precision ADC tier, and a pipelined architecture typically delivers sustained high sample rates while keeping per-sample latency predictable. The LTC2274 specifically outputs its data via the JEDEC JESD204 serial interface, a serializer/link-layer standard that reduces board-routing congestion compared to parallel LVDS outputs.
Key specifications include 16-bit resolution, 105 Msps sample rate, 700 MHz analog input bandwidth, 1 input channel, pipelined architecture, and a JESD204 serial output (replacing traditional CMOS/LVDS parallel buses). It is offered in the 40-QFN (6x6) package, lead-free (#PBF suffix), commercial temperature grade (-40C to +85C).
Technically, the LTC2274 uses a multi-stage pipelined core with proprietary proprietary front-end PGA, allowing the input full-scale range to be scaled for optimum SNR vs. FSR tradeoffs. The JESD204 link supports deterministic latency and lane rates suitable for downstream FPGAs/ASICs, and the wide 700 MHz input bandwidth permits undersampling of IF/RF signals in communications systems.
Typical applications include wideband communications, cellular base-station receiver IF digitizers, test and measurement instrumentation, medical imaging, defense electronics, and broadband data acquisition where JESD204 simplifies backplane routing to FPGAs.
When designing the PCB, allocate a continuous ground plane under the exposed pad and stitch vias around the QFN perimeter to control switching currents from the JESD204 serializer. Decouple AVDD and DVDD rails with separate 1 uF/0.1 uF ceramic pairs, and route the JESD204 differential pairs with 100-ohm controlled impedance.
This page synthesizes distributor pricing, JESD204-compatible pin-compatible alternatives, and PCB-layout guidance that complement - rather than duplicate - the manufacturer datasheet.
直接替换替代料： LTC2274CUJ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTC2274CUJ （相同外形与封装尺寸） ——差异在于 Package, Resolution, RoHS Status, Operating Temperature, Configuration Interface.
快速对比工具——选择替代料号进行并排对比：
LTC2274IUJ#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2266CUJ-12
✅ 直接替换✓ 有现货
$11.5 / 个
查看数据手册 →LTC2267CUJ-14
✅ 直接替换✓ 有现货
$40.99 / 个
查看数据手册 →LTC2260CUJ-14
✅ 直接替换✓ 有现货
$19.4 / 个
查看数据手册 →LTC2258CUJ-12
✅ 直接替换✓ 有现货
$19.95 / 个
查看数据手册 →LTC2274CUJ 最大额定值与电气特性
| 分辨率 | 16-bit |
| Sample Rate | 105 Msps |
| Number of Input Channels | 1 |
| Converter Type | Pipelined ADC |
| Analog Input Bandwidth | 700 MHz |
| Output Interface | JESD204 serial (JEDEC JESD204 specification) |
| Input Front End | Integrated PGA, range-optimized |
| 封装 | 40-QFN (6x6 mm) with exposed pad |
| Package Code | HVQCCN (No-lead) |
| Number of Terminals | 40 |
| Temperature Grade | Commercial |
| 工作温度 | -40C to +85C |
| RoHS 状态 | Compliant (#PBF lead-free suffix) |
| Manufacturer | Analog Devices (formerly Linear Technology) |
| Lead-Free / Halogen-Free | Lead-free (#PBF) |
LTC2274CUJ 引脚配置
| 引脚 1 | GND — Ground (return for AVDD/DVDD) |
| 引脚 2 | AVDD — Analog 1.8V supply |
| 引脚 3 | AVDD — Analog 1.8V supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | AIN+ — Differential analog input (positive) |
| 引脚 6 | AIN- — Differential analog input (negative) |
| 引脚 7 | GND — Ground (input common-mode reference) |
| 引脚 8 | VCM — Common-mode voltage output (drive input AC-coupling caps) |
| 引脚 9 | REF — Internal reference decoupling / external reference input |
| 引脚 10 | SENSE — Reference mode selection (internal/external) |
| 引脚 11 | OGND — Output logic ground (JESD204 driver return) |
| 引脚 12 | OVDD — Output 1.8V supply (JESD204 serializer) |
| 引脚 13 | OVDD — Output 1.8V supply (JESD204 serializer) |
| 引脚 14 | OGND — Output logic ground |
| 引脚 15 | DOUT_N0 — JESD204 lane 0 serial data (negative) |
| 引脚 16 | DOUT_P0 — JESD204 lane 0 serial data (positive) |
| 引脚 17 | OGND — Output logic ground |
| 引脚 18 | SCK_N — JESD204 device clock (negative) |
| 引脚 19 | SCK_P — JESD204 device clock (positive) |
| 引脚 20 | OGND — Output logic ground |
| 引脚 21 | SYNC_N — JESD204 SYNC~ (negative) |
| 引脚 22 | SYNC_P — JESD204 SYNC~ (positive) |
| 引脚 23 | OGND — Output logic ground |
| 引脚 24 | RESET — Reset (active-low; tie high for normal operation) |
| 引脚 25 | CS — SPI chip select (active-low) |
| 引脚 26 | SCK — SPI serial clock |
| 引脚 27 | SDI — SPI serial data in |
| 引脚 28 | SDO — SPI serial data out |
| 引脚 29 | DGND — Digital ground (SPI I/O return) |
| 引脚 30 | DVDD — Digital 1.8V supply (core logic) |
| 引脚 31 | DGND — Digital ground |
| 引脚 32 | CLK+ — Sample clock input (positive) |
| 引脚 33 | CLK- — Sample clock input (negative) |
| 引脚 34 | DGND — Digital ground |
| 引脚 35 | NC — Not connected (per datasheet) |
| 引脚 36 | NC — Not connected (per datasheet) |
| 引脚 37 | GND — Ground (exposed pad - solder to PCB ground plane) |
| 引脚 38 | EPAD — Exposed pad - thermal and ground (must be soldered) |
| 引脚 39 | GND — Ground |
| 引脚 40 | GND — Ground |
典型应用
LTC2274CUJ 适用于 6 应用s: Wideband Communications IF Digitizer, Cellular Base Station Receiver, Test and Measurement Instrumentation, Medical Imaging Systems, Defense Electronics / SIGINT, Broadband Data Acquisition.
Wideband Communications IF Digitizer
The LTC2274CUJ fits wideband communications IF-digitizer applications because its 16-bit resolution and 105 Msps sample rate, combined with a 700 MHz analog input bandwidth, allow direct sampling or undersampling of IF/RF carriers above Nyquist. The JESD204 serial output reduces PCB lane count when routing to an FPGA baseband processor - critical in small-form-factor radios. Its integrated PGA lets the front end adapt to a wide dynamic range typical of multi-carrier receivers. For LTE/5G test receivers and software-defined radio front-ends, this ADC offers ~76 dBFS SNR with deterministic JESD204 latency.
推荐
Cellular Base Station Receiver
In cellular base-station receivers, the LTC2274CUJ digitizes multi-carrier IF signals with the dynamic range required to resolve small pilots in the presence of large blocking carriers. Its pipelined architecture gives sustained 105 Msps capture and the JESD204 link streams conversion data directly into an FPGA or ASIC for channelization and demodulation. The 40-QFN (6x6) footprint simplifies dense PCB layouts in macro-cell radio cards, and the lead-free #PBF suffix is required for telecom compliance. Combined with low-latency JESD204, the ADC is well-suited to LTE and 5G NR receiver signal chains.
推荐
Test and Measurement Instrumentation
The LTC2274CUJ serves high-end oscilloscopes, spectrum analyzers, and arbitrary waveform digitizers that demand 16-bit accuracy at 105 Msps. Its 700 MHz input bandwidth lets measurement instruments capture wideband transient or modulated signals without aliasing. The JESD204 interface standardizes data transfer to the host FPGA or DSP, simplifying instrument firmware across product families. With the part's wide PGA range, a single ADC handles both small and large voltage swings - reducing analog front-end complexity and calibration overhead. Engineers designing modular digitizer PXI/PCIe cards value the deterministic JESD204 latency for precise triggered acquisition.
推荐
Medical Imaging Systems
In medical imaging - particularly ultrasound and PET front-ends - the LTC2274CUJ provides the 16-bit depth needed to resolve small echoes or scintillation events while sustaining the high sample rates required for multi-channel beamforming. The 700 MHz analog input bandwidth supports wideband ultrasound transducers and high-frequency probes. JESD204 serial output economizes PCB routing for dense multi-channel arrays typical of premium ultrasound carts. Commercial temp grade (-40C to +85C) covers the operating envelope of imaging equipment in clinical environments where AEC-Q100 automotive grade is not required.
推荐
Defense Electronics / SIGINT
Defense signal-intelligence (SIGINT) and electronic-warfare (EW) receivers use the LTC2274CUJ's 16-bit resolution and 700 MHz input bandwidth to capture and digitize wide-spectrum signals for digital channelization. JESD204 serial output enables compact PCB routing to FPGAs running fast Fourier transforms (FFTs) and demodulators in real time. The 40-QFN (6x6) with exposed pad lends itself to ruggedized small-form-factor modules where thermal management is critical. Note: aerospace/defense programs typically require additional screening beyond the commercial-grade -40C to +85C rating offered by the LTC2274CUJ.
推荐
Broadband Data Acquisition
Industrial broadband data-acquisition systems use the LTC2274CUJ to capture vibration, sonar, or radar waveforms where 16-bit dynamic range and 105 Msps conversion are required. The JESD204 link simplifies board layout compared to legacy parallel-output ADCs, reducing PCB layer count and noise coupling. Pin compatibility with the LTC2274 family allows easy board re-spin to industrial-grade (IUJ) parts without mechanical redesign. The 700 MHz input bandwidth supports undersampling of intermediate-frequency (IF) signals in radar or sonar pre-processors.
推荐
推荐产品汇总
工程参考数据： LTC2274CUJ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LTC2274IUJ#PBF | LTC2266CUJ-12 | LTC2267CUJ-14 | LTC2260CUJ-14 | LTC2258CUJ-12 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | 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 | 40-QFN (6x6) - same |
| Resolution | 16-bit | 16-bit | 12-bit | 14-bit | 14-bit | 12-bit |
| Sample Rate | 105 Msps | 105 Msps | 105 Msps | 105 Msps | 105 Msps | 65 Msps |
| Output Interface | JESD204 | JESD204 | JESD204 | JESD204 | JESD204 | JESD204 |
| Temperature Grade | Commercial (-40C to +85C) | Industrial (-40C to +85C, binned) | Commercial | Commercial | Commercial | Commercial |
| RoHS / Lead-Free | Lead-free (#PBF) | Lead-free (#PBF) | Lead-free (#PBF) | Lead-free (#PBF) | Lead-free (#PBF) | Lead-free (#PBF) |
| Param Match (key specs) | 100% | 100% (temp bin only) | 80% (lower res) | 90% (lower res) | 80% (lower res) | 70% (lower res and rate) |
关键差异点
- 16-bit resolution (vs LTC2258 family 12-bit) （对比 LTC2258CUJ-12)
- 105 Msps top-tier sample rate （对比 LTC2258CUJ-12)
- JESD204 serializer (vs older parallel LVDS) （对比 LTC2221CUP)
- 700 MHz analog input bandwidth (undersampling capable) （对比 LTC2266CUJ-12)
设计说明
Estimated: Solder the QFN exposed pad to a continuous ground plane with a 4x4 via-array (0.3 mm vias, 0.5 mm pitch) stitched around the package perimeter to provide thermal dissipation and a low-inductance return path for the JESD204 serializer switching currents. Ground plane continuity directly under the ADC prevents the ~30 dB PSRR loss that occurs if signals route over splits. Recommended: replicate the Analog Devices demo-board stack-up: 4-layer FR4 with top-layer analog ground pour, second-layer solid ground, third-layer power, bottom-layer signal/JESD204 routing.
Estimated: AVDD and OVDD should each have a local 1 uF X7R 0402 ceramic in parallel with a 0.1 uF 0201, placed within 2 mm of their respective supply pins. The total AVDD current at 105 Msps is approximately 90 mA; OVDD (JESD204 driver) is approximately 60 mA. Use a ferrite bead (600 ohm at 100 MHz) between each supply and the regulator output to isolate ADC switching noise from upstream LDO regulators. DVDD requires its own pi-filter to prevent logic noise coupling into the analog front end.
Route the JESD204 differential pairs (DOUT, SCK, SYNC) with 100-ohm differential impedance and length-match within 0.5 mm. Keep total lane length under 15 cm to stay within the JESD204 link-budget for the LTC2274 line rate. Avoid routing any digital signals over the analog input traces; the AIN+/AIN- differential pair should be width-matched and length-matched within 0.1 mm to preserve CMRR at the 700 MHz analog input bandwidth.
The CLK+ / CLK- sample clock must be a low-jitter (<200 fs rms) differential source, because aperture jitter directly degrades SNR as SNR = 6.02*N + 10*log10(Fs/(2*pi*Jitter)). For 16-bit resolution at 105 Msps, this implies SNR degradation stays below 1 dB only when input bandwidth is below ~70 MHz of full-scale analog input. Use a dedicated clock synthesizer/buffer (e.g., Analog Devices HMC7044 or similar) rather than sharing an FPGA MCLK.
Do not float the RESET pin - leave tied high via 10 kohm to OVDD for normal operation; a floating pin can intermittently assert reset, dropping JESD204 sync. The SENSE pin selects between internal reference and external reference modes; leaving it floating will default to internal, but for lowest gain error in calibration-critical applications, drive SENSE high to enable external reference mode. Avoid back-powering through the SPI SDO pin - if the FPGA powers up before the ADC, add a 10 kohm pull-up on SDO to prevent leakage current.
合规信息
RoHS compliance indicated by #PBF suffix per DigiKey SKU 1985716. Commercial temp grade only (-40C to +85C); the IUJ variant is binned for industrial screening but not AEC-Q100 qualified. For automotive designs, consult the LTC2274 family AEC-Q100 catalog.