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PDF MSA180 Data sheet ( Hoja de datos )

Número de pieza MSA180
Descripción Piezo Speaker Amplifier
Fabricantes OKI electronic 
Logotipo OKI electronic Logotipo



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No Preview Available ! MSA180 Hoja de datos, Descripción, Manual

E2D0049-39-21
www.DataSheet4U.com
¡¡SemicondSucetormiconductor
MSA180
Piezo Speaker Amplifier
This version: FeMb.S1A991980
Previous version: May. 1997
GENERAL DESCRIPTION
The MSA180 is a piezo speaker driver for OKI's speech synthesizers. Its voltage gain can be adjusted
by a factor of up to 10. The differential output provides an amplitude of twice the voltage supply.
A separate output connects to the base of an external transistor for controlling system voltage.
A standby function eliminates power loss when no input signal is present.
FEATURES
• Power supply voltage
: 2.0 V to 6.0 V (single supply voltage)
• Low current consumption
• Standby current
: 4.2 mA typ (VCC=3 V, no load)
: <1 mA
• Differential output
: Twice the supply voltage (maximum output
amplitube)
• Package options :
8-pin plastic DIP (DIP8-P-300-2.54) (Product name: MSA180RS)
8-pin plastic SOP (SOP8-P-250-1.27-K) (Product name: MSA180MS-K)
Chip
BLOCK DIAGRAM
VCC
MODE1
MODE2
AIN
GND
VCC VCC
Logic
18 kW
6.6 kW
+
AV=20
+
AV=20
6.6 kW
2.2 kW
BASE
1.3 kW
SP
SP
1/16

1 page




MSA180 pdf
¡ Semiconductor
MSA180
APPLICATION CIRCUITS
How to Adjust Gain
Gain control adjustment of the input signal level is shown below. When using OKI's speech
synthesizer devices, insert a diode in series with the variable resistor to reduce pop noise.
VDD
Signal
R1
100 kW
C1
0.1 mF
BASE
MODE2
VCC
SP
AIN MSA180
MODE1
GND
SP
PIEZO SPEAKER
The circuit below also implements gain adjustment for a higher impedance signal source.
VDD
Signal
R1
20 kW
C1
0.1 mF
BASE
MODE2
VCC
SP
AIN MSA180
MODE1
GND
SP
PIEZO SPEAKER
5/16

5 Page





MSA180 arduino
¡ Semiconductor
MSA180
Application Examples for Circuits Containing a Microcontroller or Other Peripheral
Devices
The circuit below uses a voice signal which rises high in operation mode. The MODE1 pin is used.
Be sure to connect the MODE2 pin to VCC pin.
VDD
Signal
Control Signal Input
BASE
VCC
PIEZO SPEAKER
MODE2
SP
C1
R1 AIN MSA180
MODE1
GND
SP
Note: If the BASE pin is not used, leave it open.
In the circuit below, the signal falls low in operation mode. The MODE2 pin is used. Be sure to
connect the MODE1 pin to the GND pin.
VDD
Control Signal Input
Signal
BASE
MODE2
VCC PIEZO SPEAKER
SP
R1 C1 AIN MSA180
MODE1
GND
SP
Note: If the BASE pin is not used, leave it open.
11/16

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