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AD7742:  New Low-Cost, Single-Supply, MultiChannel Synchronous VFC

The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel version in a 16-lead package (SOIC/ DIP). No user trimming is required to achieve the specified performance.

The AD7741 has a single buffered input whereas the AD7742 has four buffered inputs that may be configured as two fully-differential inputs or three pseudo-differential inputs. Both parts include an on-chip +2.5 V bandgap reference that provides the user with the option of using this internal reference or an external reference.

An evaluation board for both the AD7741 and the AD7742 is available. The model number is EVAL-AD7741/42EB, and details can be viewed by selecting the "Evaluation Tools" button to the left.

AD7742 特点

• AD7741: One Single-Ended Input Channel
  AD7742: Two Differential or Three Pseudo-Differential Input Channels
• Integral Nonlinearity of
  0.012% at fout(Max) = 2.75 MHz (AD7742) and
  at fout(Max) = 1.35 MHz (AD7741)
• Single +5 V Supply Operation
• Buffered Inputs
• Programmable Gain Analog Front-End
• On-Chip +2.5 V Reference
• Internal/External Reference Option
• Power Down to 35 µA Max
• Minimal External Components Required
• 8-Lead and 16-Lead DIP and SOIC Packages

AD7742 功能框图

AD7742 应用技术支持与电子电路设计开发资源下载

1. AD7742 数据手册DataSheet下载 . pdf
2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
3. ADC模数转换器选型指南 . pdf