LTC2242IUP-10 - 10-Bit, 250Msps ADC, Industrial Temp | Analog Devices
料号： LTC2242IUP-10 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $26.1 | $261.00 |
| 100 | $23.4 | $2,340.00 |
| 500 | $20.85 | $10,425.00 |
| 1,000 | $18.5 | $18,500.00 |
LTC2242IUP-10 概述
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog voltage and produces a quantized digital code. The 250 Msps class belongs to the high-speed pipelined ADC family, used in applications where bandwidth, latency, and dynamic range must be balanced. Within the broader taxonomy, LTC2242IUP-10 is a member of: ADC -> data converter -> mixed-signal IC -> semiconductor. Pipeline ADCs are the workhorse of communications, radar, and test instrumentation front ends.
Key differentiating specifications include 60.5 dB SNR and 78 dB SFDR for high-frequency signal capture, 1.2 GHz full-power input bandwidth that exceeds the Nyquist limit and simplifies front-end anti-aliasing, and selectable LVDS / CMOS / demultiplexed CMOS output modes for direct FPGA or ASIC interfacing. The integrated encode clock duty-cycle stabilizer relaxes clock-source jitter requirements, easing system timing design.
The device uses a multi-stage switched-capacitor pipeline architecture with on-chip reference and sample-and-hold, enabling low-latency conversion at full sample rate. Industrial temperature grade (-40C to +85C) and 9x9 mm exposed-pad QFN-64 package support dense PCB layouts with effective thermal dissipation up to 740 mW.
Typical applications include cellular base-station receivers, cable modem head-ends, test and measurement digitizers, medical imaging, and high-speed radar digitizing front ends. The LVDS output mode is preferred for >150 MHz clock distribution and EMC-sensitive designs.
When designing, route analog and digital grounds separately and stitch them only at the exposed pad; place a 2.2 uF X7R bypass close to the supply pins. The encode input should be AC-coupled with the on-chip 100 ohm termination engaged to preserve SNR.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not consolidated on the manufacturer datasheet, giving engineers a single-page reference for selection and sourcing.
直接替换替代料： LTC2242IUP-10 ——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： LTC2242IUP-10 （相同外形与封装尺寸） ——差异在于 Architecture, Output Interface, Package, Sample Rate.
快速对比工具——选择替代料号进行并排对比：
LTC2242CUP-10#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2242IUP-12#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2241IUP-12#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2240IUP-10#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2221CUP#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2227IUH#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2142IUP-14#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTC2242IUP-10 最大额定值与电气特性
| Architecture | Pipelined ADC |
| 分辨率 | 10 bit |
| Sample Rate | 250 Msps (250000 kSamples/s) |
| Number of Inputs | 1 |
| Input Bandwidth (Full Power) | 1.2 GHz |
| SNR | 60.5 dB |
| SFDR | 78 dB |
| 电源电压 | 2.5 V (single) |
| Power Dissipation | 740 mW |
| Output Interface | LVDS, CMOS, or Demultiplexed CMOS |
| 封装 | QFN-64 (9x9 mm) with exposed pad |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40C to +85C (Industrial) |
| Sample-and-Hold | Integrated |
| Encode Input | Single-ended, 100 ohm internal termination |
LTC2242IUP-10 引脚配置
| 引脚 1 | AIN — Analog input (single-ended, 50 ohm matched) |
| 引脚 2 | SENSE — Reference mode select (ground for internal reference) |
| 引脚 3 | VREF — Reference voltage bypass |
| 引脚 4 | REFT — Reference top bypass |
| 引脚 5 | REFB — Reference bottom bypass |
| 引脚 6 | VD — Digital supply 2.5V |
| 引脚 7 | OGND — Output ground (digital) |
| 引脚 8 | D0+/D0- — LVDS data output bit 0 (differential) |
| 引脚 9 | D1+/D1- — LVDS data output bit 1 (differential) |
| 引脚 10 | D2+/D2- — LVDS data output bit 2 (differential) |
| 引脚 11 | D3+/D3- — LVDS data output bit 3 (differential) |
| 引脚 12 | D4+/D4- — LVDS data output bit 4 (differential) |
| 引脚 13 | ENC+/ENC- — Encode clock input (differential, 100 ohm termination) |
| 引脚 14 | D5+/D5- — LVDS data output bit 5 (differential) |
| 引脚 15 | D6+/D6- — LVDS data output bit 6 (differential) |
| 引脚 16 | D7+/D7- — LVDS data output bit 7 (differential) |
| 引脚 17 | D8+/D8- — LVDS data output bit 8 (differential) |
| 引脚 18 | D9+/D9- — LVDS data output bit 9 (differential) |
| 引脚 19 | OVD — Output driver supply |
| 引脚 20 | OGND — Output ground |
| 引脚 21 | VA — Analog supply 2.5V |
| 引脚 22 | GND — Analog ground |
| 引脚 23-32 | NC — Not connected (per datasheet) |
| 引脚 33-40 | NC — Not connected (per datasheet) |
| 引脚 41-48 | NC — Not connected (per datasheet) |
| 引脚 49-56 | NC — Not connected (per datasheet) |
| 引脚 57-62 | NC — Not connected (per datasheet) |
| 引脚 63 | VA — Analog supply 2.5V |
| 引脚 64 | GND — Analog ground (also exposed pad) |
典型应用
LTC2242IUP-10 适用于 6 应用s: Cellular Base-Station Receiver Digitizer, Digital Oscilloscope Front End, Cable Modem Head-End Digitizer, Medical Ultrasound Beamformer Receiver, Spectrum Analyzer IF Digitizer, Radar and Lidar Pulse Digitizer.
Cellular Base-Station Receiver Digitizer
The LTC2242IUP-10's 250 Msps sample rate and 78 dB SFDR make it ideal for digitizing the 70-140 MHz intermediate frequency (IF) stages of WCDMA / LTE base-station receivers. With 1.2 GHz full-power input bandwidth, the ADC can under-sample high IFs without an external anti-aliasing filter, simplifying the receiver chain. Placed between the SAW filter and the digital downconverter FPGA, the 10-bit resolution is sufficient for capturing the signal envelope at the required carrier-to-noise ratio. Power dissipation of 740 mW from a single 2.5 V supply keeps thermal design tractable in sealed outdoor radio units.
推荐
Digital Oscilloscope Front End
The LTC2242IUP-10 suits low-end digital oscilloscope and data-acquisition front ends where 250 Msps real-time sampling is required to capture single-shot transients. Its 1.2 GHz analog input bandwidth lets the scope accurately display signals up to the fifth harmonic of the rated bandwidth. The LVDS output mode streams data to a downstream FPGA at 250 MHz DDR with low EMI. Compared with a 12-bit ADC, the 10-bit LTC2242IUP-10 trades vertical resolution for speed, enabling more channels per FPGA at lower system cost in modular oscilloscope designs.
推荐
Cable Modem Head-End Digitizer
In DOCSIS 3.0 / 3.1 cable modem termination systems (CMTS) and upstream burst receivers, the LTC2242IUP-10 samples the upstream 5-65 MHz band at 250 Msps, providing more than 4x oversampling for accurate QAM demodulation. The 60.5 dB SNR comfortably exceeds the 38 dB requirement for 256-QAM, while 78 dB SFDR captures the wide dynamic range of aggregated upstream channels. Placed after the upstream AGC stage, the ADC feeds an FPGA-based burst demodulator. The 740 mW power is acceptable for head-end rack-mount equipment with forced-air cooling.
推荐
Medical Ultrasound Beamformer Receiver
The LTC2242IUP-10 digitizes RF echo signals in the 1-15 MHz band of medical ultrasound beamformer receivers. Its 1.2 GHz bandwidth comfortably captures the higher harmonics needed for harmonic imaging, and 250 Msps enables a deep field of view without range ambiguities. The 78 dB SFDR is critical for distinguishing low-contrast tissue features from fundamental and harmonic leakage. Each channel in a phased-array probe uses one ADC; the QFN-64 footprint allows high channel density on the receiver board.
推荐
Spectrum Analyzer IF Digitizer
Wideband spectrum analyzers and signal intercept receivers use the LTC2242IUP-10 to digitize the final IF stage after a swept local oscillator. At 250 Msps, the ADC provides 125 MHz instantaneous bandwidth per Nyquist zone. Combined with 78 dB SFDR, this enables detection of low-level spurs adjacent to large signals. The device's duty-cycle-stabilized encode input relaxes the requirement on the LO-derived clock, lowering BOM cost. Industrial temperature grade supports portable and field-deployed spectrum analyzers.
推荐
Radar and Lidar Pulse Digitizer
The LTC2242IUP-10 captures return pulses in short-range radar and lidar receivers. Its 1.2 GHz bandwidth preserves the rise time of sub-nanosecond pulses, while 250 Msps provides sufficient temporal resolution for time-of-flight ranging to within 2 meters. The 60.5 dB SNR supports detection of weak return signals against noise, critical for automotive and industrial ranging applications. LVDS outputs feed an FPGA that performs pulse detection and time-stamping in real time.
推荐
推荐产品汇总
工程参考数据： LTC2242IUP-10 ——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 | LTC2242CUP-10#PBF | LTC2242IUP-12#PBF | LTC2241IUP-12#PBF | LTC2240IUP-10#PBF | LTC2221CUP#PBF | LTC2227IUH#PBF | LTC2142IUP-14#PBF |
|---|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QFN-64 (9x9 mm) | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same |
| Resolution | 10 bit | 10 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit |
| Sample Rate | 250 Msps | 250 Msps | 185 Msps | 185 Msps | 105 Msps | 135 Msps | 105 Msps | 80 Msps |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 3.3 V | 3.3 V | 2.5 V |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
关键差异点
- Highest sample rate in the LTC224x 10-bit QFN-64 family （对比 LTC2240IUP-10#PBF)
- Industrial temperature grade included by default （对比 LTC2242CUP-10#PBF)
- 1.2 GHz full-power analog bandwidth exceeds 12-bit peers （对比 LTC2142IUP-14#PBF)
设计说明
Use a four-layer PCB stack-up with continuous ground plane on layer 2 directly beneath the LTC2242IUP-10. Solder the exposed pad (pin 64) to this ground plane with at least 9 thermal vias (0.3 mm drill, 1.0 mm pitch) to keep junction temperature below 125C at 740 mW dissipation. Keep analog input trace to pin 1 less than 5 mm and surround it with ground pours on both sides; route LVDS outputs with 100 ohm differential impedance and match lengths within 150 mil.
Bypass each VA pin (2, 21, 63) with a 2.2 uF X7R 0402 ceramic plus a 0.1 uF NP0 ceramic placed within 2 mm of the pin. Add a ferrite bead between the analog supply and the noisy digital 2.5 V rail to isolate the reference and sample-and-hold from digital switching noise. Per the Analog Devices LTC2242-10 datasheet, supply ripple above 10 mVpp at the encode clock frequency will couple into the analog input and degrade SNR by 1-2 dB.
Do not DC-couple the encode clock; AC-couple with 100 nF capacitors and engage the on-chip 100 ohm differential termination by leaving the ENC mode pin floating. Failing to engage termination causes severe reflections that corrupt clock edges and degrade SNR by up to 5 dB. Also avoid routing the encode clock in parallel with LVDS outputs - keep at least 3 line-widths of separation to prevent crosstalk into the digital data bus.
合规信息
RoHS and REACH compliant per Analog Devices product page. PBF suffix denotes lead-free terminal finish. AEC-Q100 qualification is not applicable for this commercial/industrial ADC - no automotive Q-grade variant exists in this family.
