LX1792CN [MICROSEMI]
Audio Amplifier, 1 Channel(s), 1 Func, PDIP14, PLASTIC, DIP-14;
| 型号： | LX1792CN |
| 厂家： | 
Microsemi |
| 描述： | Audio Amplifier, 1 Channel(s), 1 Func, PDIP14, PLASTIC, DIP-14 放大器 光电二极管 商用集成电路 |
| 文件： | 总9页 (文件大小：324K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
KEY FEATURES
DESCRIPTION
The MSC-LX1792 offers a patent
The LX1790 consists of a preamplifier
ꢀ Low Operating Current: 120µA
Typical
pending, low voltage, low power, and followed by a fixed gain class D amplifier.
high efficiency amplifier for driving a
ꢀ Low Operating Voltage: 0.9V
minimum
high impedance speaker such as a hearing
aid receiver.
The input resistor and feedback
ꢀ Gain set by external resistors
ꢀ 3 Output Switch Resistance
Settings: 48, 24 & 16 Ω
ꢀ 5uVrms input referred noise.
resistor is external in the LX1792 making
it possible to set the gain arbitrarily, up to
The core of the amplifier is built upon approximately 40dB. The feedback
Microsemi’s patented LX1790 class D resistor can also be potentiometer to
amplifier.
facilitate volume control.
APPLICATIONS
ꢀ Hearing Aid applications
ꢀ High impedance speaker
/Transducer applications
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
CLOCK
CMP
HBRIDGE
DIN
PRE AMP
Σ
SPEAKER
PACKAGE ORDER INFO
Plastic Dip
14-Pin
Plastic MLPM
8-Pin
Bare Die
TJ (°C)
N
LM
10 to 55
LX1792CN
LX1792CLM
LX1792 bare die
Copyright 2001
Rev. 0.3,2002-03-11
Microsemi
Page 1
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
PACKAGE PIN OUT
ABSOLUTE MAXIMUM RATINGS
Input Logic Supply Voltage (VDD).......................................-0.3V to +3.0V
Operating Temperature Range................................................10°C to 55°C
1
2
8
VSS
VDD
Note: Exceeding these ratings could cause damage to the device. All voltages are
with respect to Ground. Currents are positive into, negative out of
specified terminal.
OUTP
PREOUT
IN
7
6
OUTN
IMPSEL
3
4
5
LM PACKAGE
(Top View)
FUNCTIONAL PIN DESCRIPTION
PIN NAME
PIN NO
14 PIN DIP
(EVALUATION
SAMPLES)
PIN NO
8 PIN MLPM
DESCRIPTION
VDD
VSS
IN
13
2
8
14
1
9
8
1
5
7
2
6
3
Supply Voltage
Ground
Analog Audio Input
Positive Output Voltage
Negative Output Voltage
Pre amplifier output
OUTP
OUTN
PREOUT
IMPSEL
6
Output Resistance Select. See Settings table below for selections.
SETTINGS
PIN
IMPSEL=VSS
IMPSEL=VDD
IMPSEL=Floating
IMPSEL
16Ω
24Ω
48Ω
Copyright 2001
Microsemi
Page 2
Rev. 0.3,2002-03-11
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
RECOMMENDED OPERATING CONDITIONS
LX1792
Typ
Parameter
Symbol
Test Conditions
Units
Min
Max
OPERATING CONDITIONS
Supply Voltage
Ground
ꢀ
VDD
VSS
0.9
1.5
V
V
0
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature TA=25°C except where otherwise
noted. Test conditions: VDD=1.3V, VSS=0V, Circuit connected as application schematic on page 5, No load
LX1792
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
Switch Output Resistance @ Low
ROUT-L
ROUT-M
ROUT-HI
48
Drive
Switch Output Resistance @ Med
24
16
Ω
Drive
Switch Output Resistance @ High
19
Drive
Quiescent Current @ Low Drive
Quiescent Current @ Med Drive
Quiescent Current @ High Drive
3dB Bandwidth – min Frequency
3dB Bandwidth – max Frequency
Output Switching Frequency
Gain1
IDDQL
IDDQM
IDDQH
FMIN
110
120
130
40
µA
100
Hz
KHz
KHz
dB
R1=50k, R2=1000k
FMAX
50
FCLK
200
32
A1
R1=50k, R2=1000k
Input Reference
Power Supply Rejection Ratio
PSRR
45
dB
R1=50k, R2=1000k
Total Harmonic Distortion
Input Referred Noise
THD1
VN-20
R1=50k, R2=1000k, Vin=5mVrms
0.3
5
%
µV
R1=50k, R2=1000k, 100Hz-10kHz, No weighting
Output clock frequency
140
0
200
0.5
300
5
KHz
mV
FCLK
VOFF-NP
Max absolute DC Offset OutN-OutP
No input signal
Copyright 2001
Rev. 0.3,2002-03-11
Microsemi
Page 3
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
CHARTS
Copyright 2001
Microsemi
INTEGRATED PRODUCTS
Page 4
Rev. 0.3,2002-03-11
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
LX1790 H-bridge on impedance
30
25
20
15
10
5
0
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
Supply voltage
Figure 2 – H-Bridge Impedance vs. Supply Voltage (Lowest Impedance Setting)
Copyright 2001
Microsemi
INTEGRATED PRODUCTS
Page 5
Rev. 0.3,2002-03-11
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
APPLICATION SCHEMATIC
Transducer/Speaker
Battery
0.9-1.5 V
VSS
VDD
Volume cntrl
potentiometer
OUTN
IMPsel
NC
OUTP
R2
PRE-
OUT
R1
IN
Microphone
SUGGESTED EXTERNAL APPLICATION COMPONENTS
Description
Input AC coupling capacitor, must be present
COMPONENT
SUGGESTED VALUE
CIN
C2
R1
R2
100nF
For best performance this should be as close as possible to the supply pins
Input resistor > 25k Ohms
> 25k Ohm
Preamplifier feedback resistor
If the audio source (for example a microphone) has a low power supply rejection an
RX/CX
additional filter for the supply to this have to be added.
Copyright 2001
Microsemi
INTEGRATED PRODUCTS
Page 6
Rev. 0.3,2002-03-11
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
MECHANICAL – 8 PIN MLPQ PACKAGE OUTLINE
8-Pin Plastic MLP-Micro Exposed Pad
LM
MILLIMETERS
INCHES
Dim
MIN
2.90
2.90
0.65
0.15
MAX
3.10
3.10
0.75
0.25
MIN
MAX
A
A
B
C
D
E
F
G
H
I
0.114 0.122
0.114 0.122
0.025 0.029
0.005 0.009
0.075 BSC
K
J
E
1.841 BSC
B
0.27
0.43
0.010 0.016
0.025 BSC
0.65 BSC
H
1.22 BSC
0.048 BSC
0
0.10
0.37
0.10
0
0.003
I
G
F
J
0.21
0
0.008 0.014
K
0
0.003
C
Internally Connected
together, but
isolated from all
other terminals
D
14-Pin Plastic Dip
N
A
MILLIMETERS
Dim
MIN
18.54
6.09
-
MAX
20.57
6.60
5.08
0.51
1.52
MIN
0.730
0.240
-
A
B
C
D
F
B
1
F
0.38
0.76
L
G
H
J
2.54 BSC
1.27
0.20
3.18
2.28
0.38
-
C
K
J
K
L
7.62 BSC
H
G
M
15°
SEATING PLANE
M
D
Note:
1. Dimensions do not include mold flash or protrusions;
these shall not exceed 0.155mm(.006”) on any side.
Lead dimension shall not include solder coverage.
Copyright 2001
Rev. 0.3,2002-03-11
Microsemi
Page 7
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
MECHANICALS 7-PIN BARE DIE
MILLIMETERS
INCHES
Dim
MIN
MAX
1.15
1.78
MIN
MAX
X
Y
0.045
0.070
Note:
1. Dimensions do not include mold flash or
protrusions;
these
shall
not
exceed
0.155mm(.006”) on any side. Lead dimension
shall not include solder coverage.
Copyright 2001
Microsemi
Page 8
Rev. 0.3,2002-03-11
INTEGRATED PRODUCTS
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
3 / 1 1 / 2 0 0 2
LX1792
INTEGRATED PRODUCTS
Low Voltage, Low Power, AudioMite™
PRELIMINARY SPECIFICATION
NOTES
Copyright 2001
Microsemi
INTEGRATED PRODUCTS
Page 9
Rev. 0.3,2002-03-11
5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541
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