RF2456 데이터 시트보기 (PDF) - RF Micro Devices

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RF2456

CDMA/FM DOWNCONVERTER

RF Micro Devices 

RF2456

Application Schematic

VCC

1 µF

33 nF

1

16

FM SAW Filter

FM IF OUT

2

L

3

4

L

L

CDMA SAW Filter

5

CDMA IF OUT

L

6

IF SELECT

7

6

PD

8

15

14

33 nF

13

33 nF

15 nH

12

MIX IN

15 nH

11

3.3 pF

10

5.6 nH

9

33 nF

LO IN

Evaluation Board Schematic

(Download Bill of Materials from www.rfmd.com.)

NOTE:

**Core: Fair-Rite Balun #2865002402

L12: 3 turns #30 AWG (Green)

L34: 12 turns #32 AWG (Red)

One turn = One pass through BOTH holes winding starts and finishes on same end of core.

L12 and L34 exit opposite ends of core.

P1-1

P1

1 VCC

2 GND

3

P2-1

P2-3

P2

1 IF SELECT

2 GND

3 ENABLE

VCC

J2

FM IF2

VCC

J3

CDMA IF1

VCC

IF SELECT

ENABLE

50 Ω µstrip

R3

10 Ω

C1

33 nF

C2

10 pF

L1

150 nH

C10

+ 1 uF

C5

33 nF

C3

9 pF

50 Ω µstrip

R1

T1

33 Ω **XFMER

R2

68 Ω

L3

3.3 uH

L2

390 nH

C4

9 pF

L4

3.3 uH

50 Ω µstrip

1

16

2

15

2 GND

F1*

DNI

C9

L7

3

14

33 nF

15 nH

L8*

TBD

4

13

C8

L6

33 pF

15 nH

50 Ω µstrip

5

12

6

11

7

10

8

9

Enable

0

0

1

1

IF Select

0

1

0

1

Stage

Off

Off

FM

CDMA

2456400 Rev A

R4

220 Ω

C7

1.5 pF

L5

8.2 nH

C6

33 nF

50 Ω µstrip

J5

J1

RF IN

J4

LO IN

6-4

Rev B6 010717

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