RF2418PCBA データシートの表示（PDF） - RF Micro Devices

部品番号

コンポーネント説明

メーカー

RF2418PCBA

LOW CURRENT LNA/MIXER

RF Micro Devices 

RF2418

Application Schematic

Buffered Output Configuration

850 MHz

RF IN

10 nH

VDD

100 nF 47 pF

C1

IF OUT

IF Filter, 50Ω R1

1

2

3

4

10pF

5

6

BUFFER

7

LNA

RF AMP

MIXER

14

13

12

15nH

11

10

1 nF

9

4 pF

8

10 nH

Image Filter, 50 Ω

LO IN

VDD

R2

L1

L1 should parallel resonate, at the IF frequency, with the internal

10pF capacitor plus any extra parasitic layout capacitance.

100 nF 100 nF

R1 and R2 are bias resistors that set the bias current for the buffer

amplifier. The value recommended is 510 W, each. Higher values

will decrease the current consumption but also decrease the output

level at which voltage clipping begins to occur. At lower IF

frequencies, where the internal 10 pF capacitor does not roll off the

conversion gain, L1 may be eliminated.

C1 is a blocking capacitor, in case the IF filter's input is not an open

circuit at DC.

Rev A7 060203

8-25

Share Link: