LTC2221 12-Bit, 135Msps ADC

The LTC®2220 and LTC2221 are 170Msps/135Msps, sampling 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2220/LTC2221 are perfect for demanding communications applications with AC performance that includes 67.5dB SNR and 80dB spurious free dynamic range for signals up to 170MHz. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with excellent noise performance.

DC specs include ±0.4LSB INL (typ), ±0.3LSB DNL (typ) and no missing codes over temperature. The transition noise is a low 0.5LSBRMS.

The digital outputs can be either differential LVDS, or single-ended CMOS. There are three format options for the CMOS outputs: a single bus running at the full data rate or two demultiplexed buses running at half data rate with either interleaved or simultaneous update. A separate output power supply allows the CMOS output swing to range from 0.5V to 3.6V.

The ENC+ and ENC– inputs may be driven differentially or single ended with a sine wave, PECL, LVDS, TTL, or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles

产品特点 Features
  • Sample Rate: 170Msps/135Msps
  • 67.5dB SNR up to 140MHz Input
  • 80dB SFDR up to 170MHz Input
  • 775MHz Full Power Bandwidth S/H
  • Single 3.3V Supply
  • Low Power Dissipation: 890mW/660mW
  • LVDS, CMOS, or Demultiplexed CMOS Outputs
  • Selectable Input Ranges: ±0.5V or ±1V
  • No Missing Codes
  • Optional Clock Duty Cycle Stabilizer
  • Shutdown and Nap Modes
  • Data Ready Output Clock
  • Pin Compatible Family
    185Msps: LTC2220-1 (12-Bit)
    170Msps: LTC2220 (12-Bit), LTC2230 (10-Bit)
    135Msps: LTC2221 (12-Bit), LTC2231 (10-Bit)
  • 64-Pin 9mm × 9mm QFN Package
封装
LTC2221 封装
应用
  • Wireless and Wired Broadband Communication
  • Cable Head-End Systems
  • Power Amplifier linearization
  • Communications Test Equipment
典型应用图
LTC2221 典型应用
参数
LTC2221 参数
LTC2221 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LTC2221CUP QFN 64 C $46.92  $33.92 
LTC2221CUP#PBF QFN 64 C $46.92  $33.92 
LTC2221CUP#TR QFN 64 C $34.02 
LTC2221CUP#TRPBF QFN 64 C $34.02 
LTC2221IUP QFN 64 I $58.65  $42.40 
LTC2221IUP#PBF QFN 64 I $58.65  $42.40 
LTC2221IUP#TR QFN 64 I $42.50 
LTC2221IUP#TRPBF QFN 64 I $42.50 
LTC2221 演示电路板
器件型号 描述
DC750A-B LTC2221CUP | High Speed ADC, VCC = +3.3V, 135Msps, 12-Bit 1MHz < AIN < 100MHz (Requires DC890 and LVDS_TRANSFORMER)
DC750A-F LTC2221CUP | High Speed ADC, VCC = +3.3V, 135Msps, 12-Bit AIN > 100MHz (Requires DC890 and LVDS_TRANSFORMER)
Companion Boards
器件型号 描述
DC1075A Clock Divider board
DC1164A High Speed ADC Signal Source
DC1216A-A 100MHz High Speed ADC Clock Source
DC1216A-B 122.88MHz High Speed ADC Clock Source
DC1216A-C 80MHz High Speed ADC Clock Source
DC890_LVDS_XFMR LVDS Power Transformer, goes with DC890B/ LVDS output demoboards
DC890B High Speed (up to 250Mbps, CMOS/LVDS) USB Data Collection Board
LTC2221 数据手册及相关资料下载
  1. 数据手册(英文) : LTC2221/LTC2220 - 12-Bit,170Msps/135Msps ADCs.PDF
  2. 设计要点 (英文) :DN1013 - Understanding the Effect of Clock Jitter on High Speed ADCs .PDF
  3. 可靠性数据 : R478 Reliability Data .PDF
  4. 产品选型卡 : Differential Amplifiers/High Speed ADC Drivers .PDF
  5. 产品选型卡 : Low Power, 16-Bit Dual/Single ADCs .PDF