SP8400 Datasheet, PDF (1/6 Pages) Mitel Networks Corporation – Very Low Phase Noise Synthesiser Divider

SP8400
Very Low Phase Noise Synthesiser Divider
DS3739 - 2.1 April 1994
The SP8400 is a very low phase noise programmable
divider which is based on a divide by 8/9 dual modulus
prescaler and a 12 stage control counter. This gives a minimum
division ratio of 56 (64 for fractional - N synthesis applications),
and a maximum division ratio of 4103. Special circuit
techniques have been used to reduce the phase noise
considerably below that produced by standard dividers.The
data inputs are CMOS or TTL compatible.
The SP8400 is packaged in a 28 pin plastic SO package.
FEATURES
s Very low Phase Noise (Typically -156dBc/Hz at 1kHz
offset)
s Supply Voltage 5V
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
Output Current
Storage Temperature Range
Maximum Clock Input Voltage
6.5V
20mA
-55°C to +125°C
2.5V p-p
ORDERING INFORMATION
SP8400 KG MPES(Commercial Grade)
M2
1
M1
2
M0
3
V_CC +5V
4
GND
5
CLOCK INPUT
6
CLOCK INPUT
7
CLOCK INPUT
8
CLOCK INPUT
9
GND
10
V_CC +5V
11
V_CC +5V
12
GND
13
A0
14
28
M3
27
M4
26
M5
25
M6
24
M7
23
M8
22
N/C
21
OUTPUT
20
OUTPUT
19
N/C
18
V_CC +5V
17
N/C
16
A2
15
A1
MP28
Fig.1 Pin connections - top view
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
10
100
1k
10k
Frequency (Hz)
Fig.2 Typical single sideband phase noise measured at 300MHz
100k