
2
SP8605/6
Maximum frequency (sinewave input)
Minimum frequency (sinewave input)
Current consumption
Output low voltage
Output high voltage
Minimum output swing
fMAX
fMIN
IEE
VOL
VOH
VOUT
10
13
2
192
2
093
500
Min.
Max.
150
100
2
162
2
075
Value
Notes
GHz
MHz
mA
V
mV
5
3
4
Input = 400-1200mV p-p
Input = 600-1200mV p-p
VEE = 2545V, outputs
unloaded
VEE = 252V, RL = 430
(25°C)
VEE = 252V, RL = 430
(25°C)
VEE = 252V, RL = 430
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, the Electrical Characteristics are guaranteed over specified supply, frequency and temperature range
Supply voltage, VCC = 0V, VEE = 252V 6 025V
Temperature, TAMB = 0°C to 170°C
Conditions
Symbol
Characteristic
Type
SP8605B
SP8606B
All
Fig. 3 Typical input characteristics of SP8605B and SP8606B
THERMAL CHARACTERISTICS
uJC approximately 30°C/W
uJA approximately 110°C/W
OPERATING NOTES
1. The clock input (pin 4) should be capacitively coupled to the
signal source. The input signal path is completed by connecting
a capacitor from the internal bias decoupling, pin 6, to ground.
2. In the absence of a signal the device will self-oscillate. If this is
undesirable, it may be prevented by connecting a 10k
resistor
from the unused input to VEE i.e. from pin 4 to pin 7. This will reduce
the input sensitivity by approximately 100mV.
3. The circuit will operate at very low input frequencies but slew
rate must be better than 200V/s.
4. The input impedance of the SP8605/6 is a function of frequency,
see Fig. 4.
5. The emitter follower outputs require external load resistors.
These should not be less than 330
and a value of 430
is
recommended. Interfacing to ECLlll/10K is shown in Fig. 7.
6. These devices may be used with split suopply lines and ground
referenced input; a suitable configuration is shown in Fig. 6.
7. All components should be suitable for the frequency in use.
Units
NOTES
1. The temperature coefficients of VOH = 112mV/°C, and VOL = 1024mV/°C but these are not tested.
2. The test configuration for dynamic testing is shown in Fig.5.
3. Tested at 25°C and 170°C only.
4. Tested at 25°C only
5. Tested at 170°C only.
1400
1200
1000
800
600
400
200
0
100
200
300
400
500
600
700
800
900
1000 1100 1200 1300
INPUT FREQUENCY (MHz)
INPUT
AMPLITUDE
(mV
p-p)
* Tested as specified
in table of Electrical
Characteristics
GUARANTEED *
OPERATING
WINDOW
SP8605B
SP8606B
TAMB = 170°C