RF2668 Ver la hoja de datos (PDF) - RF Micro Devices

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RF2668

CDMA/FM TRANSMIT MODULATOR, IF AGC, AND UPCONVERTER WITH INTEGRATED PLL

RF Micro Devices 

RF2668

Preliminary

RF OUT

5

LO2

MIX IN+

MIX IN-

MOD OUT-

MOD OUT+

Application Schematic

Single- or Dual-Mode Operation

10 nF

MIX VCO PLL

VCC MODE CE AGC EN EN ON

270 Ω

1 nF

OSC REF

SET1

10 nF VCC

12 nH

2 pF

VCC

10 nF

100 pF

100 pF

1 nF

1 nF

1 nF

1 nF

48 47 46 45 44 43 42 41 40 39 38 37

1

Band Gap

Rel

2

3

4

5

Bias

Supply

/R

Lock

Detect

Charge

/N

Pump

36

35

34

33 LD

32

6

31

7

30

10 nF

1 nF

2.2 nF

36 kΩ 220 pF 33 pF

D1

39 nH

**

10 nF

39 nH

8

29

200 Ω

9

28

10

Σ

Quad

/2

27

11

26

12

25

13 14 15 16 17 18 19 20 21 22 23 24

10 nF

47 kΩ

VCC

VCC

10 nF

1 nF

10 nF

L1*

L2*

1 nF

39 kΩ

10 nF

*L1 and L2 are the bias

choke inductor.

VGC

OSIG

REF ISIG

**Denotes components not normally populated.

SET2

DO

VCC

**

3.9 kΩ

VTUNE

DO

LO1+

LO1-

VCC

5-80

Rev B4 010423

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