Features
q
Very High Speed Operation 3.3GHz
q
Silicon Technology for low Phase Noise
(Typically better than -140dBc/Hz at 10kHz)
q
Specified Over the Full Military Temperature
Range
q
Low Power Dissipation 345mW (typ)
q
5V Single Supply Operation
q
High Input Sensitivity
q
Very Wide Operating Frequency Range
q
Available as DESC SMD 5962-9157001MPA
Figure 1 SP8808 Block diagram
400
400
500
500
8
2mA
2.5mA
6
7
6.75mA
5
3
2
VCC
1
SUPPLY
INPUT
INPUT
GND
OUTPUT
OUTPUT
V
REF
(2V)
Ordering Information
SP8808/A/DG Military temperature range
DES9157001/AC/DGAZ (SMD
)
SP8808
3.3GHz
8 Fixed Modulus Divider
Advance Information
DS2113
Issue 7.3
june 1998
Description
Thermal Characteristics
ja = 150
C/W
jc = 50
C/W
Absolute Maximum Ratings
Supply voltage V
CC
6.5V
Clock Input voltage
2.5V p-p
Storage temperature range
-65
C to +150
C
Junction temperature
+175
C
The SP8808 is one of a range of very high speed low
power prescalers for professional and military
applications. The device features a complementary
output stage with on chip current source for the emitter
follower outputs.
SP8808
Advance Information
2
Electrical Characteristics
Guaranteed over the temperature range T
amb
-55
C to +125
C (see note) and supply voltage range 4.75V
to 5.25V. Tested at T
amb
= -55
C and +110
C, V
CC
= 4.75V and 5.25V.
Supply current
Input sensitivity
0.65GHz to 2.8GHz
3.3GHz
Input impedance (series equivalent)
Output Voltage with f
in
=1000MHz
Output Voltage with f
in
= 3GHz
1
2, 3
2, 3
6, 7
6, 7
69
50
2
1
0.4
mA
mV
mV
pF
Vp-p
Vp-p
V
CC
= 5V
RMS sinewave
measured in 50 ohm system.
See Figs. 3 & 4
V
CC
= 5V
V
CC
= 5V load as Fig. 4
Pin
Characteristic
Conditions
Min
Typ
Max
Units
Value
NOTE: Devices must be used with a suitable heatsink to maintain chip temperature below 175
C when
operating at T
amb
>110
C.
500
400
300
200
100
VIN (mV RMS
INTO 50 OHMS)
1
2
3
4
,,
FREQUENCY (GHz)
Tested as
specified in Table
of electrical
characteristics
*
GUARANTEED*
OPERATING
WINDOW
Figure 3 Typical input sensitivity
DG8
Figure 2 Pin connections
NC
GND
INPUT
OUTPUT
INPUT
OUTPUT
VCC
5
6
7
8
NC
4
3
2
1
SP8808
85
175
400
0.8
SP8808
3
Advance Information
Figure 5 Typical input impedance
1
8
2
7
3
6
4
5
SP8808
50
POWER
METER
RATIO
COUNTER
1n
1n
+5V
COAXIAL
SWITCH
0.1
50
SIGNAL
GENERATOR
FROM
OUTPUT
0.1
470
3p
OUTPUT LOAD FOR
AMPLITUDE MEASUREMENTS
Figure 4 Test circuit
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