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PDF ELM412 Data sheet ( Hoja de datos )
| Número de pieza | ELM412 | |
| Descripción | Piezo Element Driver | |
| Fabricantes | ELM | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ELM412 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
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ELM412
Piezo Element Driver
Description
The ELM412 is an 8 pin oscillator circuit for
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.
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.
Typically the ELM412 is used to relieve a
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.
Applications
• Computer controlled tone generation
• Alarm warning signals
• Keyboard click generation
• Logic probe circuits
Features
• Low power CMOS design
• 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
Connection Diagram
PDIP and SOIC
(top view)
VDD 1
F2 2
F1 3
F0 4
8 VSS
7 Out1
6 Out2
5 Enable
Block Diagram
Enable 5
Programmable
Oscillator
F2 2
F1 3
F0 4
Waveform
Generator
7 Out1
6 Out2
F2 F1 F0 Frequency
LLL
600
L L H 1200
L H L 2000
L H H 2400
H L L 2800
H L H 3200
H H L 3600
H H H 4000
Table 1
ELM412DSB
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
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| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet ELM412.PDF ] | |
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