AD654JNZ/+

更新时间： 2024-11-26 12:59:59

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
11页	184K
描述
VOLTAGE-FREQUENCY CONVERTER, 0.5MHz, PDIP8, MINI, PLASTIC, DIP-8

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AD654JNZ/+ 数据手册

Low Cost Monolithic

Voltage-to-Frequency Converter

AD654

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Low Cost

Single or Dual Supply, 5 V to 36 V, ؎5 V to ؎18 V

Full-Scale Frequency Up to 500 kHz

Minimum Number of External Components Needed

Versatile Input Amplifier

Positive or Negative Voltage Modes

Negative Current Mode

–V

DRIVER

OSC

High Input Impedance, Low Drift

Low Power: 2.0 mA Quiescent Current

Low Offset: 1 mV

AD654

LOGIC

COMMON

OUT

PRODUCT DESCRIPTION

2. A minimum number of low cost external components are

necessary. A single RC network is all that is required to set

up any full scale frequency up to 500 kHz and any full-scale

input voltage up to ±30 V.

The AD654 is a monolithic V/F converter consisting of an input

amplifier, a precision oscillator system, and a high current output

stage. A single RC network is all that is required to set up any

full scale (FS) frequency up to 500 kHz and any FS input voltage

up to ± 30 V. Linearity error is only 0.03% for a 250 kHz FS,

and operation is guaranteed over an 80 dB dynamic range. The

overall temperature coefficient (excluding the effects of external

components) is typically ±50 ppm/°C. The AD654 operates from

a single supply of 5 V to 36 V and consumes only 2.0 mA quies-

cent current.

3. Plastic packaging allows low cost implementation of the

standard VFC applications: A/D conversion, isolated signal

transmission, F/V conversion, phase-locked loops, and tuning

switched-capacitor filters.

4. Power supply requirements are minimal; only 2.0 mA of

quiescent current is drawn from the single positive supply

from 4.5 volts to 36 volts. In this mode, positive inputs can

vary from 0 volts (ground) to (+V_S–4) volts. Negative inputs

can easily be connected for below ground operation.

The low drift (4 µV/°C typ) input amplifier allows operation

directly from small signals such as thermocouples or strain gauges

while offering a high (250 MΩ) input resistance. Unlike most

V/F converters, the AD654 provides a square-wave output, and

can drive up to 12 TTL loads, optocouplers, long cables, or

similar loads.

5. The versatile open-collector output stage can sink more than

10 mA with a saturation voltage less than 0.4 volts. The Logic

Common terminal can be connected to any level between

ground (or –V_S) and 4 volts below +V_S. This allows easy

direct interface to any logic family with either positive or

negative logic levels.

PRODUCT HIGHLIGHTS

1. Packaged in both an 8-lead mini-DIP and an 8-lead SOIC

package, the AD654 is a complete V/F converter requiring

only an RC timing network to set the desired full-scale fre-

quency and a selectable pull-up resistor for the open-collector

output stage. Any full scale input voltage range from 100 mV

to 10 volts (or greater, depending on +V_S) can be accommo-

dated by proper selection of the timing resistor. The full-

scale frequency is then set by the timing capacitor from the

simple relationship, f = V/10 RC.

REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

World Wide Web Site: http://www.analog.com

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AD654JNZ/+ 替代型号

型号	品牌	替代类型	描述	数据表
AD654JNZ	ADI	功能相似	Low Cost Monolithic Voltage-to-Frequency Converter

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