LM740 Bluetooth Audio Module Class 2 Module CSR … · · 2015-04-23LM740 Bluetooth Audio Module...

LM740Page 1 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]

Overview

Features

Applications

LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna

Part NoRevised

Product

27/FEB/2015740-0411

LM740

Bluetooth v2.1 + EDR compliant firmware

Class 2 device with up to 25 m range in open space

AT Command interface available forHFP/HSP/A2DP/AVRCP firmware

HFP/HSP/A2DP/AVRCP profiles supported.SPP/PBAP firmware under development

Development kit (LM556) for LM740 available for development

Application Schematic for LM740 available for development

Integrated Switched-mode regulator

Embedded Kalimba DSP Co-processor

Integrated Switched-mode regulator

Embedded Kalimba DSP Co-processor

Integrated battery charging option

Integrated 16-bit Stereo Audio CODEC 95dB SNR for DAC

UART baud rate upto 921600 bps supported

Enhanced Audibility and Noise cancellation

Integrated 16 MB flash memory

True Wireless Stereo Support

APTX Support

Support UART, PIO and USB Host Interface

CSR Bluecore 05 Multimedia External Flash(BC05-MM Ext) chipset

Lead free - RoHS compliant

Small Size : 16mm x 15mm x 2.2mm

High Quality Stereo Wireless Headsets

High Quality Mono Headsets

Vehicle Infotainment Systems

Wireless Speakers

VoIP Handsets

Bluetooth Enabled Automotive Wireless Gateways

Handsfree kits

LM740 is LM Technologies Ltd Class 2 Bluetooth Multimedia module with external antenna. This module is a CSR Bluecore 5 Multimedia External BC05 MM chip based surface mount module available with Bluetooth Handsfree (HFP), Headset (HSP), Advanced Audio Distribution Profile (A2DP) and Audio Video Remote Control Profile (AVRCP) combo firmware. The firmware can be configured via AT commands over UART interface or PIO interface via push buttons.

This module is ideal for multimedia applications in vehicle infotainment systems, handsfree kits, headsets, Bluetooth speakers and Bluetooth Stereo Headsets. This module is available with Bluetooth 2.1 + EDR compliant firmware. Firmware for A2DP Speakers, Stereo Transmitter is available upon request.

15mm

16m

m

General Specification

Packaging Options

LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna

Part NoRevised

Product

27/FEB/2015740-0411

LM740

Tape and ReelPart No 740-0413

LM740 with Bluetooth 2.1 +EDR firmware

Tray PackagingPart No 740-0412


IndividualPart No 740-0411


Chipset

Power Classification

Module Type

Bluetooth Specification

Frequency

Temperature Range

Data Rate

Range

Rx Sensitivity

Antenna

Voltage operation

Current Consumption (standby mode)

Current Consumption (ACL Connection, master role)

Current Consumption (data transfer, master role)

Current Consumption (ACL Connection, slave role)

Current Consumption (data transfer, slave role)

Power Output

Default Firmware

Size

Bluetooth Profile

Interface

Digital Audio Bus

Codec

DSP Processor

Flash Memory

RoSH Compliant

CSR Bluecore 5 Multimedia External BC05 MM

Class 2

Surface Mount SMT

Core v2.1 + EDR

2402 - 2480 MHz

-20° C to +70° C

Up to 3 Mbps in HCI Mode

25m in open space

-82 dBm typical

External Antenna

1.8 - 3.6v

0.06 mA

4.4 mA

9.1 mA

15 mA

21 mA

+ dBm

LM-SRX-ATC-YYYYMMDD (AT Command Firmware), LM-RX-HIC

(PIO firmware)

16mm x 15mm x 2mm

Handsfree Profile (HFP), Advanced Audio Distribution Profile

(A2DP), Audio Video Remote Control (AVRCP), Serial Port Profile

(SPP), Phone Book Access Profile (PBAP)

UART, PIO’s, USB Host Interface

PCM, I2S or SPDIF

Yes, Integrated 16 bit Stereo Audio CODEC

Embedded Kalimba DSP Co-Processor

16MB

Yes


User Guides, Manuals and Widcomm Configuration Software available to download via our website - http://www.lm-technologies.com/support/downloads

Pin Assignments

Block Diagram

LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No

Revised

Product

27/FEB/2015740-0411

LM740

Pin

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Name

AGND

SPKR_B_P

SPKR_B_N

SPKR_A_P

SPKR_A_N

VDD_PIO / VDD_PADS

GND

ANT

GND

AUX_DAC

PIO 0

PIO 1

PIO 3

PIO 2

Type

AGND

Analogue

Analogue

Analogue

Analogue

VDD

GND

Analogue

GND

Analogue

I/O

I/O

I/O

I/O

Description

Analog Ground

Speaker output positive, right

Speaker output positive, right

Speaker output positive, left

Speaker output negative, left

Positive supply for PIO, AUX DAC and all other digital Input / Output ports

Common Ground

Connect to 50 ohm antenna (RF signal)

Common Ground

8 bit voltage output DAC

Programmable Input / Output Line





ANT

Balun +BFP

DC / DCConverter &Charger

X’tal 26Mhz

VDD 1V8

SPI

Charger Input4.5V - 6.5V VBAT 2.5V - 4.4V

Interface

UART

PIO

PCM/112S

AUDIO

USB

16MbitFlash

BC05MM


Revised

Product

27/FEB/2015740-0411

LM740

Pin Assignments Continued

Pin

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

Name

AIO 1

AIO 0

USB_DN

USB_DP

VDD_USB

UART_RX

UART_TX

UART_RTS

UART_CTS

PIO 10

PIO 9

PIO 11

PIO 12

GND

PIO 8

PIO 7

PIO 4

PIO 5

PIO 6

RESET #

PCM_CLK

PCM_IN

PCM_SYNC

PCM_OUT

SPI_MOSI

SPI_CS #

SPI_CLK

SPI_MISO

GND

LED 1

LED 0

1V8

LX

VDD_CHG

VBAT

Type

I/O

I/O

I/O

I/O

VDD

CMOS Input

CMOS Output

CMOS Output

CMOS Input

I/O

I/O

I/O

I/O

GND

I/O

I/O

I/O

I/O

I/O

CMOS Input

I/O

CMOS Input

I/O

CMOS Output

CMOS Input

CMOS Input

CMOS Input

CMOS Output

GND

Open Drain Output

Open Drain Output

VDD

Switch Mode power regulator output

Charger Input

Battery Terminal Positive

Description

Analog Programmable Input / Output Line

Analog Programmable Input / Output Line

USB Data Minus

USB Data Plus

Positive Supply for UART / USB Ports

UART Rx Data

UART Tx Data

UART Request to Send, Active Low

UART Clear to Send, Active Low





Common Ground






Rest if low. Input debounced so must be low >5ms to cause reset

Synchronous Data Clock

Synchronous Data Input

Synchronous Data Sync

Synchronous Data Output

SPI Data Input

Chip select for serial Peripheral Interface (SPI), active low

SPI Clock

SPI Data Output

Common Ground

LED Driver

LED Driver

1V8 Input

Switch Mode power regulator output

Lithium Ion/Polymer battery charger input

Lithium Ion/Polymer battery positive terminal. Battery O/I to SMR


RF Characteristics

Min

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Max

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

Unit

dBm

dBm

dB

dB

dB

dB

dB

dB

dB

dB

dBm

dBm/Hz

dBm

dB

dB

kHz

dBm

dBm

dBm

kHz

kHz

kHz

kHz/50μ

kHz

kHz

dBm

dBm

Typ

-82

-82

-82

>=-10

7

-6

-7

-21

-39

-43

-47

-17

-30

-156

1

35

0.5

916

-30

-50

<=-50

166

154

0.92

10

8

8

10

-50

-55

Bluetooth Specificaiton

<=-70

>=-20

<=11

<=0

<=0

<=-20

<=-30

<=-40

<=-40

<=-9

>=-39

-6 to +4

>=16

-

<=1000

<=-20

<=-40

<=-40

140<f1avg<175

115

>=0.80

+/-75

<=20

<=25

<=40

<=-30

<=-30

Characteristic

Sensitivity at 0.1%

BER for all

packet types

Maximum received signal at 0.1% BER

C/I co-chanel

Adjacent channel selectivity C/I F=F0+1 Mhz

Adjacent channel selectivity C/I F=F0-1 Mhz





Adjacent channel selectivity C/I F=FImage

Maximum Level of inter-modulation interferers

Spurious output level

Maximum RF Transmit Power

RF power control resolution

RF power control range

20 dB Bandwidth for modulated carrier

Adjacent channel trasmit power F=F0+2 Mhz

Adjacent channel trasmit power F=F0+3 Mhz

Adjacent channel trasmit power F=F0+> 3Mhz

Δf1 avg Maximum Modulation

Δf2 max Minimum Modulation

Δf1 avg / Δf2 avg

Initial Carrier Tolerance

Drift Rate

Drift (Single Slot Packet)

Drift (Five Slot Packet)

2nd Harmonic Content

3rd Harmonic Content

Frequency

2.402

2.441

2.480


Revised

Transmitter: VDD-1.8V, Temperature= +20°C

Product

27/FEB/2015740-0411

LM740

Pin Assignments Continued

Pin

50

51

52

53

54

55

Name

VREGENABLE_H (Power_On)

MIC_BIAS

MIC_B_P

MIC_B_N

MIC_A_P

MIC_A_N

Type

Analogue

Analogue

Analogue

Analogue

Analogue

Analogue

Description

Take high to enable high-voltage linear regulator and swich-mode regulator

Microphone Bias

Microphone Bias positive, right

Microphone Bias negative, right

Microphone Bias positive, left

Microphone Bias negative, left



Revised

Product

27/FEB/2015740-0411

LM740

All measurements in mm

Dimensions


PCB LAYOUT (TOP VIEW)

Design to MicroStrip Line

1.5

0.6*1.4

11

1.50.6

1.5

15

12=12*1

TOP VIEWBOTTOM VIEW

1 1

16

6.5

10

2.2

4=4*

12=

2*15=

5*1

14=1

4*1

1.5

0.7

11


Revised

Product

27/FEB/2015740-0411

LM740


5 5

4 4

3 3

2 2

1 1

DD

CC

BB

AA

BLUE

RED

Low

ESR

Low

ESR

MIC

Prog

ram

min

g

Opt

ion

(VR

EG)

The

exte

rnal

indu

ctor

(L1)

mus

t hav

e an

ESR

in th

era

nge

0.3

- 0.7

Ω

<Rev

Cod

e>

LM74

0 Ap

plica

tion

Sche

mat

ic

B

11

Tues

day,

Apr

il 07,

200

9

Title

Size

Doc

umen

t Num

ber

Rev

Dat

e:Sh

eet

of

Powe

r_on

SPI_

CLK

MFB

MFB

SPKR

_L_N

SPKR

_R_N

VOL-

LED1

SPKR

_L_N

SPI_

MO

SI

REW

LED0

REW

SPKR

_R_P

LED0

SPKR

_R_N

RES

ETB

LED1

SPKR

_R_P

VOL+

VOL+

RES

ETB

FF

MIC

_A_N

Powe

r_on

MIC

_A_P

SPI_

CSB

BIAS

_MIC

FF

SPKR

_L_P

Int_

Cha

rge

VOL-

Int_Charge

SPI_

MIS

O

BIAS

_MIC

MIC

_A_N

MIC

_A_P

SPKR

_L_P

PIO

5

PIO

5

1V8

AGN

D

VBAT

VDD

_AM

P

DG

ND

VBAT

AGN

D

1V8

AGN

D

AGN

D

AGN

D

AGN

D

DG

ND

DG

ND

1V8

VBAT

VDD

_AM

P

DG

ND

DG

ND

1V8

AGN

D

1V8

VBAT

AGN

D

AGN

DAG

ND

DG

ND

AGN

D

DG

ND

1V8

AGN

D

1V8

1V8

DG

ND

DG

ND

DG

ND

AGN

D

1V8

DG

ND

1V8

AGN

D

DG

ND

1V8

VBAT

AGN

D

AGN

D

AGN

D

DG

ND

DG

ND

DG

ND

DG

ND

1V8

R10

22K

1%

C17

NC

J4 Rig

ht

12

C15

4.7u

F

B10R

/060

3

R13

22K

1%

C10

1uF/

0603

L3 15nH

R6

10K

J1

1 2

C19

1uF/

0603

JD1

DC

JAC

K

231

XC62

09F3

32M

RNU

2

1

2

3

5 4Vi

n

GND

CE

Vout

BTP

C20

1uF/

0603

PS5

13 2

41

3 24

C3

15pF

C1

NC

/060

3

R22

1M

R27

10K

C16

NC

R5

10K

C5

10uF

/16V

/120

6

R11

39R

+

C23

220u

F/6.

3V/C

PS7

13 4

21

3 42

J5 Left

12R

26

10K

+

C18

220u

F/6.

3V/C

C26

0.1u

F

L1 22uH

LED

1

3 2

14

R21

39R

R16

10K

R2

470R

R3

470R

C2

1uF/

0603

R15

10K

C9

1uF/

0603

C8

10uF

/16V

/120

6

R1

2.2K

R25

10K

C7

0.1u

F

L5 0R

R9

22K

1%

R24

22K

1%

C4

15pF

R4

100K

R23

22K

1%PS

?1

3 24

13 2

4

C13

10uF

/16V

/120

6

C22

0.1u

F

R12

1M

C27

1uF/

0603

PS4

13 2

41

3 24

ANT1

1

PS3

13 2

41

3 24

C14

0.1u

F

U1

LM-7

40

1 10 1312 14643 115

20

338

54

36

27

2829

26

232221

2524

1716

1918

9

15

3134 32

46

42 3041 3839 37

43

40 3572

47

4544

484950

535251

55

AGN

D

AUX_

DAC

PIO

3PI

O1

PIO

2

PIO

_PO

WER

SPKR

_A_P

SPKR

_B_N

PIO

0

SPKR

_A_N

UART_RX

PIO

6R

F_IO

MIC_A_P

PCM

_IN

PIO12

GN

DPI

O8

PIO11

UART_CTSUART_RTSUART_TX

PIO9PIO10

USB_DNAIO0

VDD_USBUSB_DP

GN

D

AIO1

PIO

4

RES

ETB

PIO

5

1V8

SPI_

MIS

O

PIO

7

SPI_

CLK

PCM

_OU

TSP

I_M

OSI

PCM

_SYN

C

GND SPI_

CS#

PCM

_CLK

GN

D

SPKR

_B_P

LX

LED0LED1

VDD_CHGVBAT

POWER_ON

MIC_B_NMIC_B_P

MIC_BIAS

MIC_A_N

R18

22K

1%

PS2

13 4

21

3 42

R7

100K

C12

0.1u

F

R?

10K

L2 15nH

R14

22K

1%

PS1

13 4

21

3 42

C11

15pF

J2

BAT

CO

N

2 1

R20

22K

1%

C21

0.1u

F

PS6

13 2

41

3 24

C24

1uF/

0603

J3 CO

N6

321 654

L4 0R

U3

TPA6

112A

2

19

23478

10 5 6

VO1

VO2

IN1-

IN1+

BYPA

SS

IN2+

IN2-

VDD

VSS

shut

down

C25

1uF/

0603

LM74

0

Revision History


Revised

Product

27/FEB/2015740-0411

LM740

1.0 17/NOV/2011 First version with new layout

1.1 20/MAR/2012 Some minor changes in data sheet content

1.2 12/FEB/2014 1. Packaging information corrected

2. Revision information added

1.3 27/FEB/2015 Updated Datasheet


Date post:	13-May-2018
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LM740 Bluetooth Audio Module Class 2 Module CSR … · · 2015-04-23LM740 Bluetooth Audio Module...

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