Low Voltage, Low Power, AudioMite鈩?/div>
Class-D Audio Amplifier
P
RELIMINARY
S
PECIFICATION
DESCRIPTION
KEY FEATURES
W W W.
Microsemi
.COM
The MSC-LX1792 offers a patent
pending, low voltage, low power, and
high efficiency amplifier for driving a
high impedance speaker such as a hearing
aid receiver.
The core of the amplifier is built upon
Microsemi鈥檚 patented LX1790 class D
amplifier.
The LX1790 consists of a preamplifier
followed by a fixed gain class D amplifier.
The input resistor and feedback
resistor is external in the LX1792 making
it possible to set the gain arbitrarily, up to
approximately 40dB.
The feedback
resistor can also be potentiometer to
facilitate volume control.
!
Low Operating Current: 120碌A(chǔ)
Typical
!
Low Operating Voltage: 0.9V
minimum
!
Gain set by external resistors
!
3 Output Switch Resistance
Settings: 48, 24 & 16
鈩?/div>
!
5uVrms input referred noise.
APPLICATIONS
!
Hearing Aid applications
!
High impedance speaker
/Transducer applications
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
C
LOCK
D
IN
P
RE
A
MP
危
CMP
H
BRIDGE
S
PEAKER
PACKAGE ORDER INFO
LX1792
LX1792
T
J
(擄C)
擄
10 to 55
J
Ceramic Dip
14-Pin
LX1792CJ
LM
Plastic MLPM
8-Pin
LX1792CLM
DU
Plastic MSOP
8-Pin
LX1792CDU
BD
Bare Die
LX1792BD
Copyright
錚?/div>
2001
Rev. 0.3,2002-05-08
Microsemi
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
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