LX1790BD [MICROSEMI]

Audio Amplifier, 1 Channel(s), 1 Func, DIE-7;


型号：	LX1790BD
厂家：	Microsemi
描述：	Audio Amplifier, 1 Channel(s), 1 Func, DIE-7 放大器商用集成电路
文件：	总7页 (文件大小：256K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LX1790

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

DATASHEET

KEY FEATURES

DESCRIPTION

The MSC-LX1790 offers a patent

The MSC-LX1790 also comes with

ꢀ Low Operating Current: 100µA

Typical

pending, low voltage, low power, and three output switch resistance settings to

high efficiency amplifier for driving a accommodate different receivers. It is

hearing aid receiver. It comes with three delivered in bare die form.

programmable gain settings of 14dB,

ꢀ Low Operating Voltage: 0.9V

minimum

ꢀ 3 Gain Settings: 14, 20 & 26dB

ꢀ 3 Output Switch Resistance

Settings: 48, 24 & 16 Ω

ꢀ Small Form Factor: 2.03mm²

Bare die

20dB and 26dB.

APPLICATIONS

ꢀ Hearing Aid

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

PRODUCT HIGHLIGHT

CLOCK

CMP

HBRIDGE

D_IN

PRE AMP

SPEAKER

Simplified Block Diagram

PACKAGE ORDER INFO

Ceramic Dip

Plastic MLPM

Bare Die

7-Pin

LX1790BD

T_J(°C)

10 to 55

14 -Pin

8-Pin

LX1790CJ

LX1790LM (*)

(*) Contact factory for availability

Microsemi

Page 1

Rev. 0.4a,2002-04-09

INTEGRATED PRODUCTS

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

LX1790

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

DATASHEET

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

IMP_SEL

(100,952)

V_SS

OUT_N

OUT_P

(1590,818)

(1590,609)

(1590,349)

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.

(100,279)

(100,100)

V_DD

GAIN_SEL

(1590,105)

(0,0)

Pad Locations Are (X_MIN, Y_MIN) and are in µm

(Bottom View)

V_SS

OUT_N

IMP_SEL

V_DD

OUT_P

GAIN_SEL

LM PACKAGE

(Top View)

OUT_N

V_SS

OUT_P

V_DD

IMP_SEL

GAIN_SEL

J PACKAGE

(Top View)

FUNCTIONAL PIN DESCRIPTION

PIN NAME

PIN NO

8 PIN LM

PIN NO

14 PIN J

DESCRIPTION

V_DD

V_SS

OUT_P

OUT_N

GAIN_SEL

IMP_SEL

Supply Voltage

Ground

Analog Audio Input

Positive Output Voltage

Negative Output Voltage

Gain Select. See Settings table below for selections.

Output Resistance Select. See Settings table below for selections.

SETTINGS

GAIN_SEL=VDD

IMP_SEL=VSS

GAIN_SEL=VSS

GAIN_SEL=Floating

IMP_SEL=Floating

IMP_SEL=VDD

GAIN_SEL

IMP_SEL

14dB

16Ω

20dB

24Ω

26dB

48Ω

Microsemi

Page 2

Rev. 0.4a,2002-04-09

INTEGRATED PRODUCTS

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

LX1790

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

DATASHEET

RECOMMENDED OPERATING CONDITIONS

LX1790

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, R_LOAD=200Ω in Series with 60mH

LX1790

Parameter

Symbol

Test Conditions

Units

Min

Typ

Max

Switch Output Resistance @ Low

R_OUT-L

R_OUT-M

R_OUT-HI

Drive

Switch Output Resistance @ Med

Ω

Drive

Switch Output Resistance @ High

Drive

Quiescent Current @ Low Drive

Quiescent Current @ Med Drive

Quiescent Current @ High Drive

3dB Bandwidth – mid Frequency

3dB Bandwidth – max Frequency

Output Switching Frequency

Gain Setting 1

IDDQ_L

IDDQ_M

IDDQ_H

F_MIN

100

110

120

µA

100

KHz

All gain settings

F_CLK

F_MAX

200

A₁

A₂

V_IN= 100mV_RMS@ 1KHz

V_IN= 50mV_RMS@ 1KHz

V_IN= 25mV_RMS@ 1KHz

Input Reference

Gain Setting 2

Gain Setting 3

A₃

Power Supply Rejection Ratio

PSRR

Total Harmonic Distortion @ Gain =

THD₁₄

THD₂₀

THD₂₆

V_IN= 50mV_RMS@ 1KHz

V_IN= 25mV_RMS@ 1KHz

V_IN=12mV_RMS@ 1KHz

0.3

14dB

Total Harmonic Distortion @ Gain =

20dB

Total Harmonic Distortion @ Gain =

26bd

Input Referred Noise

Input Resistance

V_N-14

V_N-20

Gain = 14dB, 100Hz – 10Khz, A-Weighted

Gain = 20dB, 100Hz – 10Khz, A-weighted

Gain = 26dB, 100Hz – 10Khz, A-weighted

Gain = 14dB

µV

V_N-26

µV

R_IN-14

R_IN-20

R_IN-26

F_CLK

120

200

K Ω

KHz

Input Resistance

Gain = 20dB

Input Resistance

Gain = 26dB

Output clock frequency

DC Offset OutN-OutP

140

-5

300

No input signal

V_OFF-NP

Rev. 0.4a,2002-04-09

Microsemi

Page 3

INTEGRATED PRODUCTS

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

LX1790

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

DATASHEET

CHARTS

THD vs input level

3.5

2.5

1.5

0.5

100

Input [mVrms]

Figure 1 – THD vs. Input Level FIN = 1kHz, Gain = 20dB (Note: clip level at 90mVrms)

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)

Microsemi

INTEGRATED PRODUCTS

Page 4

Rev. 0.4a,2002-04-09

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

LX1790

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

DATASHEET

MECHANICALS

7-Pin Bare Die

MILLIMETERS

INCHES

Dim

1.78mm

MIN

MAX

1.15

1.78

MIN

MAX

0.045

0.070

(100,952)

0.190 0.216 0.0075 0.0085

(1590,818)

(1590,609)

(1590,349)

1.15mm

(100,279)

(100,100)

(1590,105)

(0,0)

Pad Locations Are (X_MIN, Y_MIN) and are in µm

14-Pin Ceramic Dip

MILLIMETERS

Dim

MIN

19.30

5.59

MAX

19.94

7.11

5.08

0.51

1.77

MIN

0.38

1.02

2.54 BSC

2.03

0.38

5.08

7.87

15°

0.20

3.17

7.37

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. 0.4a,2002-04-09

Microsemi

Page 5

INTEGRATED PRODUCTS

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

LX1790

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

DATASHEET

MECHANICALS

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

1.841 BSC

0.27

0.43

0.010 0.016

0.025 BSC

0.65 BSC

1.22 BSC

0.048 BSC

0.10

0.37

0.10

0.003

0.21

0.008 0.014

0.003

Internally Connected

together, but

Note:

isolated from all

other terminals

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.

Microsemi

Page 6

Rev. 0.4a,2002-04-09

INTEGRATED PRODUCTS

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

LX1790

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

DATASHEET

NOTES

Microsemi

Page 7

Rev. 0.4a,2002-04-09

INTEGRATED PRODUCTS

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

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