深圳市中立信电子科技有限公司

AD7740YRMZ

电压频率转换及频率电压转换 3/5V Low Power Sync

3 V/5 V Low Power, Synchronous  Voltage-to-Frequency Converter

GENERAL DESCRIPTION AD7740YRMZ

The AD7740 is a low-cost, ultrasmall synchronous Voltage-toFrequency

Converter (VFC). It works from a single 3.0 V to

3.6 V or 4.75 V to 5.25 V supply consuming 0.9 mA. The AD7740

is available in an 8-lead SOT-23 and also in an 8-lead MSOP

package. Small package, low cost and ease of use were major

design goals for this product. The part contains an on-chip 2.5 V

bandgap reference but the user may overdrive this using an

external reference. This external reference range includes VDD.

FEATURES AD7740YRMZ

Synchronous Operation

Full-Scale Frequency Set by External System Clock

8-Lead SOT-23 and 8-Lead MSOP Packages

3 V or 5 V Operation

Low Power: 3 mW (Typ)

Nominal Input Range: 0 to VREF

True –150 mV Capability Without Charge Pump

VREF Range: 2.5 V to VDD

Internal 2.5 V Reference

1 MHz Max Input Frequency

Selectable High Impedance Buffered Input

Minimal External Components Required

APPLICATIONS AD7740YRMZ

Isolation of High Common-Mode Voltages

Low-Cost Analog-to-Digital Conversion

Battery Monitoring

Automotive Sensing