Datasheet > ELM412

ELM412

更新时间： 2024-10-30 04:17:19

品牌	Logo	应用领域
ELM		驱动器
页数	文件大小	规格书
4页	27K
描述
Piezo Element Driver

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ELM412 数据手册

ELM412

Piezo Element Driver

Description

Features

The ELM412 is an 8 pin oscillator circuit for

• Low power CMOS design

driving piezo-electric elements. With the exception of

one external resistor, all of the circuitry required to

drive a typical piezo ‘bender’ is contained within this

chip.

• Wide supply range - 3.0 to 5.5 volt operation

• No external timing elements required

• Generates eight common piezo frequencies

• Bridged output for greater audio power

• Modified waveform for reduced harmonics

This circuit allows the user to select one of eight

possible operating frequencies by way of three logic

level inputs. These eight frequencies represent

some of the more common resonant frequencies

used for piezo elements. If desired, the frequency

can be continually varied by the controlling circuit.

The output of the ELM412 uses a bridge

configuration to obtain maximum audio drive for a

given power supply level. A single input pin is all that

is required to gate the output on and off.

Connection Diagram

PDIP and SOIC

(top view)

Typically the ELM412 is used to relieve

processor of the duty of waveform generation,

allowing it to concentrate on other activities,

although the circuit can also be used in stand-alone

tone generator circuits.

VDD

VSS

Out1

Out2

Enable

Applications

• Computer controlled tone generation

• Alarm warning signals

• Keyboard click generation

• Logic probe circuits

Block Diagram

Enable

F2 F1 F0 Frequency

600

1200

2000

2400

2800

3200

3600

4000

Out1

Out2

Programmable

Oscillator

Waveform

Generator

Table 1

ELM412DSB

Elm Electronics – Circuits for the Hobbyist

1 of 4

< http://www.elmelectronics.com/ >

12 3 4

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