LTC6948IUFD-3 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC6948IUFD-3

Ultralow Noise 0.37GHz to 6.39GHz Fractional-N Synthesizer with Integrated VCO

Linear Technology 

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Block Diagram

1

28 27

REF+ REF– VREF+

LTC6948

25

24

VCP+

GND

STAT

2

3 CS

SCLK

4

SDI

5

SDO

6

VD+

8

SERIAL

PORT

≤425MHz

7 LDO 1.7V TO 2.6V

LDO

REGULATOR

+–

EXPOSED

PAD

29

MUTE

9

R_DIV

÷1 TO 31

≤100MHz PFD

LOCK

÷32 TO 1023

B_DIV

1mA TO

11.2mA

CP

26

VVCO+ 23

GND 21

CMA 20

N_DIV

∆∑

÷1 TO 6, 50%

373MHz TO 6.39GHz

O_DIV

CAL, ALC

CONTROL

CMB 19

CMC 18

GND 17

TUNE

15

MUTE

2.24GHz TO 3.74GHz (LTC6948-1) OR

3.08GHz TO 4.91GHz (LTC6948-2) OR

3.84GHz TO 5.79GHz (LTC6948-3) OR

4.20GHz TO 6.390GHz (LTC6948-4)

GND RF– RF+ VRF+

10 11 12 13

BB TB BVCO

14 16 22

6948 BD

For more information www.linear.com/LTC6948

6948f

13

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