ADI AD7741BRZ

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. The AD7741 has a single-ended voltage input range from 0 V to REFIN. The AD7742 has a differential voltage input range from -VREF to +VREF. Both parts operate from a single +5 V supply consuming typically 6 mA, and also contain a power-down feature that reduces the current consumption to less than 35 μA.

• AD7741: One Single-Ended Input Channel
• AD7742: Two Differential or Three Pseudo-Differential Input Channels
• Integral Nonlinearity of 0.012% at f0UT(Max)=2.75 MHz (AD7742) and at f0UT(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

• Low Cost Analog-to-Digital Conversion
• Signal Isolation