DESCRIPTION

· The AD7741/AD7742 are synchronous voltage-to-frequency converters (VFCs).
· AD7741: Single-channel, 8-lead package (SOIC/DIP).
· AD7742: Multichannel, 16-lead package (SOIC/DIP).
· No user trimming required for specified performance.
· AD7741: Single buffered input.
· AD7742: Four buffered inputs configurable as two differential or three pseudo-differential inputs.
· On-chip +2.5 V bandgap reference with internal/external reference option.
· AD7741: Single-ended voltage input range 0 V to REFIN.
· AD7742: Differential voltage input range –V REF to +V REF.
· Operates from a single +5 V supply, typically 6 mA current consumption.
· Power-down feature reduces current consumption to less than 35 mA.

FEATURES

· AD7741: One single-ended input channel.
· AD7742: Two differential or three pseudo-differential input channels.
· Integral nonlinearity of 0.012% at f OUT(Max) = 2.75 MHz (AD7742) and 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 mA max.
· Minimal external components required.
· 8-Lead and 16-Lead DIP and SOIC packages.

APPLICATIONS

· Low cost analog-to-digital conversion.
· Signal isolation.