Datasheet > ATA5743

ATA5743

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
43页	765K
描述
UHF ASK/FSK Receiver

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数据手册

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ATA5743 数据手册

ATA5743

Figure 4-2. Input Matching Network with SAW Filter

LNAGND

ATA5743

LNA_IN

ATA5743

LNA_IN

25n

22p

25n

27p

C16

68n

120n

TOKO LL2012

100p

TOKO LL2012

f_RF= 315 MHz

f_RF= 433.92 MHz

TOKO LL2012

RF_IN

B3761

B3760

OUT

22n

47n

GND

1, 3, 4 6, 7, 8

Figure 4-3. Input Matching Network without SAW Filter

f_RF= 433.92 MHz

f_RF= 315 MHz

LNAGND

ATA5743

15p

25n

27p

25n

LNA_IN

C16

100p

C16

100p

RFIN

RF_IN

1.5p

C17

2.7p

C17

33n

47n TOKO LL2012

TOKO LL2012

F22NJ

F39NJ

Please notice that for all coupling conditions (see Figure 4-2 and Figure 4-3), the bond wire

inductivity of the LNA ground is compensated. C3 forms a series resonance circuit together with

the bond wire. L = 25 nH is a feed inductor to establish a DC path. Its value is not critical, but

must be large enough not to detune the series resonance circuit. For cost reduction this inductor

can be easily printed on the PCB. This configuration improves the sensitivity of the receiver by

about 1 to 2 dB.

4839B–RKE–08/05

1...4 5 678 9 10...43

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