AD9642 14-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V Analog-to-Digital Converter (ADC)

The AD9642 is a 14-bit analog-to-digital converter (ADC) with sampling speeds of up to 250 MSPS. The AD9642 is designed to support communications applications, where low cost, small size, wide bandwidth, and versatility are desired. Integrated 14-bit, 170 MSPS/210 MSPS/250 MSPS ADC. Operation from a single 1.8 V supply and a separate digital output driver supply accommodating LVDS outputs. Proprietary differential input maintains excellent SNR performance for input frequencies of up to 350 MHz. 3-pin, 1.8 V SPI port for register programming and readback. Pin compatibility with the AD9634, allowing a simple migration from 14 bits to 12 bits, and with the AD6672.

The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. The ADC features wide bandwidth inputs that can support a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. A duty cycle stabilizer (DCS) is provided to compensate for variations in the ADC clock duty cycle, allowing the converter to maintain excellent performance.

The ADC output data is routed directly to the external 14-bit LVDS output port.

Flexible power-down options allow significant power savings, when desired.

Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface.

The AD9642 is available in a 32-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C. This product is protected by a U.S. patent.

APPLICATIONS
  • Communications
  • Diversity radio systems
  • Multimode digital receivers (3G) TD-SCDMA, WiMax, WCDMA, CDMA2000, GSM, EDGE, LTE
  • I/Q demodulation systems
  • Smart antenna systems
  • General-purpose software radios
  • Ultrasound equipment
  • Broadband data applications
PRODUCT HIGHLIGHTS
  • Integrated 14-bit, 170 MSPS/210 MSPS/250 MSPS ADC.
  • Operation from a single 1.8 V supply and a separate digital output driver supply accommodating LVDS outputs.
  • Proprietary differential input maintains excellent SNR performance for input frequencies of up to 350 MHz.
  • 3-pin, 1.8 V SPI port for register programming and readback.
  • Pin compatibility with the AD9634, allowing a simple migration from 14 bits to 12 bits, and with the AD6672.
Features and Benefits
  • SNR = 71.0 dBFS at 185 MHz AIN and 250 MSPS
  • SFDR = 83 dBc at 185 MHz AIN and 250 MSPS
  • −152.0 dBFS/Hz input noise at 200 MHz, −1 dBFS AIN,
    250 MSPS
  • Total power consumption:
    390 mW at 250 MSPS
  • 1.8 V supply voltages
  • LVDS (ANSI-644 levels) outputs
  • Integer 1-to-8 input clock divider (625 MHz maximum input)
  • Sample rates of up to
    250 MSPS
  • IF sampling frequencies of up to 350 MHz
  • Internal ADC voltage reference
  • Flexible analog input range
    1.4 V p-p to 2.0 V p-p
    (1.75 V p-p nominal)
  • See data sheet for additional features
Analog to Digital Converters
AD9642 IBIS Model
Reference Designs
Data Sheets
Documentnote
AD9642: 14-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V Analog-to-Digital Converter (ADC) Data Sheet (Rev. B)PDF 1613 kB
Application Notes
Documentnote
AN-878: High Speed ADC SPI Control Software (Rev. A)PDF 585 kB
AN-905: Visual Analog Converter Evaluation Tool Version 1.0 User Manual (Rev. 0)PDF 2124 kB
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)PDF 985 kB
AN-282: Fundamentals of Sampled Data SystemsPDF 2131 kB
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)PDF 291.7 K
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs (Rev. 0)PDF 203 kB
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)PDF 363 kB
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B)PDF 401 kB
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)PDF 392 kB
AN-737: How ADIsimADC Models an ADC (Rev. B)PDF 373 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)PDF 1535 kB
AN-877: Interfacing to High Speed ADCs via SPI (Rev. A)PDF 1594 kB
AN-803: Pin Compatible High Speed ADCs Simplify Design Tasks (Rev. 0)PDF 356 kB
User Guides
Documentnote
UG-386: Evaluating the AD9642/AD9634/AD6672 Analog-to-Digital ConvertersPDF 3293 kB
AD9642 Quick Start GuidePDF 188 kB
Technical Books
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD9642BCPZ-170 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padOTH 490-40 to 85C45.1738.4Y
AD9642BCPZ-210 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padOTH 490-40 to 85C6857.8Y
AD9642BCPZ-250 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padOTH 490-40 to 85C81.9469.65Y
AD9642BCPZRL7-170 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padREEL 1500-40 to 85C45.1738.4Y
AD9642BCPZRL7-210 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padREEL 1500-40 to 85C6857.8Y
AD9642BCPZRL7-250 Production32 ld LFCSP (5x5x.75mm) w/3.6exposed padREEL 1500-40 to 85C81.9469.65Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
AD9642-170EBZEvaluation Board300Y
AD9642-210EBZEvaluation Board300Y
AD9642-250EBZEvaluation Board300Y
Reference Materials
AD9642: 14-Bit, 170 MSPS/210 MSPS/250 MSPS, 1.8 V Analog-to-Digital Converter (ADC) Data Sheet (Rev. B) ad9642
AD9642BCPZ (All Speed Grades) ad9642
设计和集成文件 adl5565
AN-878: High Speed ADC SPI Control Software (Rev. A) ad6655
AN-905: Visual Analog Converter Evaluation Tool Version 1.0 User Manual (Rev. 0) ad9220
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B) ad9220
AN-282: Fundamentals of Sampled Data Systems ad1674
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0) ad9220
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs (Rev. 0) ad6655
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0) ad9220
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B) ad7476
AN-835: 高速ADC测试和评估 (Rev. 0) ad9510
AN-1142: 高速ADC PCB布局布线技巧 (Rev. 0) ad6655
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0) ad6655
AN-878: 高速ADC SPI控制软件[中文版] (Rev. A) ad6655
AN-282: 采样数据系统基本原理[中文版] (Rev. A) ad75019
AN-737: 如何用ADIsimADC完成ADC建模 (Rev. B) ad6642
AN-737: How ADIsimADC Models an ADC (Rev. B) ad9220
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0) ad9863
AN-827: 放大器与开关电容ADC接口的匹配方法[中文版] (Rev. 0) ad8351
AN-877: 通过SPI与高速ADC接口[中文版] (Rev. A) ad9271
AN-877: Interfacing to High Speed ADCs via SPI (Rev. A) ad7091r
AN-905: VisualAnalog™转换器评估工具1.0版用户手册 (Rev. 0) ad6655
AN-935: ADC变压器耦合前端设计[中文版] (Rev. 0) ad6655
AN-803: 利用引脚兼容高速ADC简化设计任务 (Rev. 0) ad6672
AN-803: Pin Compatible High Speed ADCs Simplify Design Tasks (Rev. 0) ad6672
AN-756: 系统采样以及时钟相位噪声和抖动的影响[中文版] (Rev. 0) ad9540
UG-386: Evaluating the AD9642/AD9634/AD6672 Analog-to-Digital Converters ad6672
AD9642 Quick Start Guide ad9642
MT-031: 实现数据转换器的接地并解开AGND和DGND的谜团 ad6672
MT-002: 奈奎斯特准则对数据采样系统设计有何意义 ad6672
MT-075: Differential Drivers for High Speed ADCs Overview ad6672
CN0279：集成带通滤波器的高中频采样接收机前端 adl5565
MS-2210：高速ADC的电源设计 ad9861
MS-2124：了解高速ADC的交流特性 ad7915
MS-1779：九项常被忽略的ADC技术规格 ad6672
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