LX1792CLM [MICROSEMI]

Low Voltage, Low Power, AudioMite Class-D Audio Amplifier; 低电压，低功耗， AudioMite D类音频放大器


型号：	LX1792CLM
厂家：	Microsemi
描述：	Low Voltage, Low Power, AudioMite Class-D Audio Amplifier 低电压，低功耗， AudioMite D类音频放大器消费电路商用集成电路音频放大器视频放大器光电二极管
文件：	总9页 (文件大小：199K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

KEY FEATURES

DESCRIPTION

The MSC-LX1792 offers a patent

pending, low voltage, low power, and followed by a fixed gain class D amplifier.

The LX1790 consists of a preamplifier

ꢀ Low Operating Current: 120µA

Typical

ꢀ Low Operating Voltage: 0.9V

high efficiency amplifier for driving a

high impedance speaker such as a hearing resistor is external in the LX1792 making

aid receiver. 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.

The input resistor and feedback

minimum

ꢀ Gain set by external resistors

ꢀ 3 Output Switch Resistance

Settings: 48, 24 & 16 Ω

ꢀ 5uVrms input referred noise.

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

D_IN

PRE AMP

SPEAKER

PACKAGE ORDER INFO

Ceramic Dip

14-Pin

LX1792CJ

Plastic MLPM

8-Pin

LX1792CLM

Plastic MSOP

8-Pin

LX1792CDU

Bare Die

T_J(°C)

10 to 55

LX1792BD

Rev. 0.3,2002-05-08

Microsemi

Page 1

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

ABSOLUTE MAXIMUM RATINGS

PACKAGE PIN OUT

Input Logic Supply Voltage (V_DD).......................................-0.3V to +3.0V

Operating Temperature Range................................................10°C to 55°C

V_SS

V_DD

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.

OUT_P

PREOUT

OUT_N

IMP_SEL

LM PACKAGE

(Top View)

V_SS

OUT_N

V_DD

OUT_P

IMP_SEL

PREOUT

SETTINGS

IMP_SEL=VSS

IMP_SEL=VDD

IMP_SEL=Floating

DU PACKAGE

(Top View)

IMP_SEL

16Ω

24Ω

48Ω

OUT_P

OUT_N

V_SS

V_DD

IMP_SEL

PREOUT

J PACKAGE

(Top View)

FUNCTIONAL PIN DESCRIPTION

PIN NO

8 PIN LM

NAME

14 PIN J

(EVALUATION

SAMPLES)

DESCRIPTION

8 PIN DU

V_DD

V_SS

Supply Voltage

Ground

Analog Audio Input

Positive Output Voltage

Negative Output Voltage

Pre amplifier output

OUT_P

OUT_N

PREOUT

IMP_SEL

Output Resistance Select. See Settings table below for selections.

Rev. 0.3,2002-05-08

Microsemi

Page 2

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

RECOMMENDED OPERATING CONDITIONS

LX1792

Typ

Parameter

Symbol

Test Conditions

Units

Min

Max

OPERATING CONDITIONS

Supply Voltage

Ground

V_DD

V_SS

0.9

1.5

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature T_A=25°C except where otherwise

noted. Test conditions: V_DD=1.3V, V_SS=0V, Circuit connected as application schematic on page 5,Output loaded with 200Ohm in series

with 60mH.

LX1792

Typ

Parameter

Symbol

Test Conditions

Units

Min

Max

Switch Output Resistance @ Low

Drive

Switch Output Resistance @ Med

Drive

Switch Output Resistance @ High

Drive

R_OUT-L

R_OUT-M

R_OUT-HI

Ω

Quiescent Current @ Low Drive

Quiescent Current @ Med Drive

Quiescent Current @ High Drive

3dB Bandwidth – min Frequency

3dB Bandwidth – max Frequency

Output Switching Frequency

IDDQ_L

IDDQ_M

IDDQ_H

F_MIN

110

120

130

No load

µA

100

R1=50k, R2=1000k, Fin=1kHz

F_CLK

F_MAX

KHz

200

R1=50k, R2=500k

R1=25k, R2=500k

Input Reference

R1=50k, R2=500k

R1=50k, R2=500k, Vin=5mVrms, Fin=1kHz

R1=25k, R2=500k, Vin=5mVrms, Fin=1kHz

R1=50k, R2=500k, 100Hz-10kHz, No weighting

R1=25k, R2=500k, 100Hz-10kHz, No weighting

Gain1

A₁

Power Supply Rejection Ratio

Total Harmonic Distortion

Input Referred Noise

PSRR

THD1

V_N-20

0.3

0.5

µVrms

Output clock frequency

140

200

0.5

300

KHz

F_CLK

Max absolute DC Offset OutN-OutP

No input signal

V_OFF-NP

()

Rev. 0.3,2002-05-08

Microsemi

Page 3

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

CHARTS

Note: Graphs show distortion with no load outputs

Rev. 0.3,2002-05-08

Microsemi

Page 4

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

CHARTS (CONTINUED)

LX1790 H-bridge on impedance

0.8

0.9

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)

Rev. 0.3,2002-05-08

Microsemi

INTEGRATED PRODUCTS

Page 5

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

APPLICATION SCHEMATIC

Transducer/Speaker

Battery

0.9-1.5 V

VSS

VDD

Volume cntrl

potentiometer

OUTN

IMPsel

OUTP

PRE-

OUT

Microphone

SUGGESTED EXTERNAL APPLICATION COMPONENTS

Component

Suggested value

Description

CIN

100nF

Input AC coupling capacitor, must be present

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

additional filter for the supply to this have to be added.

RX/CX

Rev. 0.3,2002-05-08

Microsemi

Page 6

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

MECHANICAL – 8 PIN MLPQ PACKAGE OUTLINE

8-Pin Plastic MLP-Micro Exposed Pad

MILLIMETERS

INCHES

Dim

MIN

2.90

0.65

0.15

MAX

3.10

0.75

0.25

MIN

MAX

0.114 0.122

0.025 0.029

0.005 0.009

0.075 BSC

0.010 0.016

0.025 BSC

0.048 BSC

0.003

0.008 0.014

1.841 BSC

0.27

0.43

0.65 BSC

1.22 BSC

0.21

0.10

0.37

0.10

0.003

Internally Connected

together, but

isolated from all

other terminals

14-Pin Ceramic Dip

MILLIMETERS

INCHES

Dim

MIN

19.30

5.59

0.38

1.02

MAX

19.94

7.11

5.08

0.51

1.77

MIN

MAX

0.760

0.220

0.015

0.040

0.785

0.280

0.200

0.020

0.070

2.54 BSC

0.100 BSC

2.03

0.38

5.08

7.87

15°

0.080

0.015

0.200

0.310

15°

0.20

3.18

7.37

0.008

0.125

0.290

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.

Rev. 0.3,2002-05-08

Microsemi

Page 7

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

MECHANICALS 7-PIN BARE DIE

8-Pin MSOP

Dim

MILLIMETERS

INCHES

MIN

2.85

2.90

–

MAX

3.05

3.10

1.10

0.40

MIN

MAX

.112

.114

–

.120

.122

0.043

0.25

0.009

0.160

0.65 BSC

0.025 BSC

0.38

0.13

0.64

0.18

0.015

0.005

0.025

0.007

0.95 BSC

0.037 BSC

0.40

0.70

0.016

0.027

3°

0.05

4.75

0.15

5.05

0.002

0.187

0.006

0.198

MILLIMETERS

INCHES

Dim

MIN

MAX

1.15

1.78

MIN

MAX

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.

Rev. 0.3,2002-05-08

Microsemi

Page 8

INTEGRATED PRODUCTS

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

LX1792

Low Voltage, Low Power, AudioMite™

I N T E G R A T E D P R O D U C T S

Class-D Audio Amplifier

PRELIMINARY SPECIFICATION

NOTES

Preliminary Data – Information contained in this document is pre-production data and is

proprietary to Microsemi. It may not be modified in any way without the express written

consent of Microsemi. Product referred to herein is offered in sample form only and

Microsemi reserves the right to change or discontinue this proposed product at any time.

Rev. 0.3,2002-05-08

Microsemi

INTEGRATED PRODUCTS

Page 9

5973 Avenida Encinas, Suite 101, Carlsbad 92008, Fax (760) 431-0541

相关型号：