LTC6909 Linear Dimensions Semiconductor, LTC6909 Datasheet - Page 7

• Manufacturer Part Number: LTC6909
• Description: Multiphase Silicon Oscillator
• Manufacturer: Linear Dimensions Semiconductor

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BLOCK DIAGRAM
R
SET
MOD
GND 2
SET
V
+
A
16
14
1
V
+
–
+
–
BIAS
GND
V
+
V
SET
+
–
INPUT DECODER
CLOCK INPUT
I
SET
3-STATE
DETECT
=
V
+
R
– V
SET
SET
MDAC
I
REF
WHEN A CLOCK SIGNAL IS PRESENT AT THE
MOD PIN INPUT, THE MODULATION IS DISABLED
f
(SSFM = OFF)
MASTER
= 20MHz • 10k •
CODE GENERATOR
PSEUDORANDOM
1 POLE
LPF
V
V
I
I
MASTER
MASTER
+
– V
OSCILLATOR
SET
MASTER
= 20MHz • 10k/R
OUT
POR
SET
PH0 PH1 PH2
3
DIVIDE BY
PHASING
DRIVERS
16/32/64
OUTPUT
OUTPUT
STABLE
UNTIL
Hi-Z
4
15
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
LTC6909
V
13
+
D
6909 BD
10
11
12
5
6
7
8
9
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
7
6909f