MITEL SP8808ADG

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