器件名称: MSA180
功能描述: Piezo Speaker Amplifier
文件大小: 147.25KB 共17页
简 介:E2D0049-39-21 Semiconductor
Semiconductor MSA180
Piezo Speaker Amplifier
This version: Feb. 1999 MSA180 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 : 4.2 mA typ (VCC=3 V, no load) Standby current : <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
BASE 2.2 kW
VCC MODE1 MODE2
VCC
VCC
Logic + – + 18 kW –
AV=20
SP 1.3 kW
AIN
AV=20
SP
GND
6.6 kW
6.6 kW
1/16
Semiconductor
MSA180
PIN CONFIGURATION (TOP VIEW)
MODE2 1 AIN 2 GND 3 SP 4 8 MODE1 7 BASE 6 VCC 5 SP
8-Pin Plastic DIP or 8-Pin Plastic SOP
PIN DESCRIPTIONS
Pin 6 3 2 Symbol VCC GND AIN Type — — I Power supply pin. Ground pin. Voice signal input pin. This pin switches the device between operation and standby modes. 8 MODE1 I The IC is in operation mode if VIH > 1.0 V on the MODE1 pin and is in standby mode if VIL < 0.3 V on the MODE1 pin. When ……
