SX1239 데이터 시트보기 (PDF) - Semtech Corporation

부품명

상세내역

제조사

SX1239

Low Power Integrated UHF Receiver

Semtech Corporation 

SX1239

ADVANCED COMMUNICATIONS & SENSING

Š When FSK modulation is enabled:

Š When OOK modulation is enabled:

RxBw = ------------------------F----X----O----S----C-------------------------

RxBwMant × 2RxBwExp + 2

RxBw

=

------------------------F----X----O----S----C-------------------------

RxBwMant × 2RxBwExp + 3

The following channel filter bandwidths are accessible (oscillator is mandated at 32 MHz):

Table 10 Available RxBw Settings

RxBwMant

(binary/value)

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

10b / 24

01b / 20

00b / 16

RxBwExp

(decimal)

7

7

7

6

6

6

5

5

5

4

4

4

3

3

3

2

2

2

1

1

1

0

0

0

RxBw (kHz)

FSK

OOK

ModulationType=00 ModulationType=01

2.6

1.3

3.1

1.6

3.9

2.0

5.2

2.6

6.3

3.1

7.8

3.9

10.4

5.2

12.5

6.3

15.6

7.8

20.8

10.4

25.0

12.5

31.3

15.6

41.7

20.8

50.0

25.0

62.5

31.3

83.3

41.7

100.0

50.0

125.0

62.5

166.7

83.3

200.0

100.0

250.0

125.0

333.3

166.7

400.0

200.0

500.0

250.0

DATASHEET

3.4.7. DC Cancellation

DC cancellation is required in zero-IF architecture receivers to remove any DC offset generated through self-reception. It is

built-in the SX1239 and its adjustable cutoff frequency fc is controlled in RegRxBw:

Rev 3 - Jan 2011

Page 21

www.semtech.com

Share Link: