GENERAL DESCRIPTION

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

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

Isolation of High Common-Mode Voltages

Low-Cost Analog-to-Digital Conversion

Battery Monitoring

Automotive Sensing

AD7740YRM属于集成电路（IC） > V/F 和 F/V 转换器。亚德诺半导体技术有限公司制造生产的AD7740YRMV/F 和 F/V 转换器压频转换集成电路 (IC) 监视输入电压并输出比例频率，以用于汽车传感、电池监测、模数转换和信号隔离等应用。频压转换 IC 输出与输入频率成比例的模拟电压，用于速度感应、转速计、巡航控制和触摸式开关等仪器和仪表。