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PDF SP8795 Data sheet ( Hoja de datos )
| Número de pieza | SP8795 | |
| Descripción | 225MHz 32/33 TWO MODULUS DIVIDER | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SP8795 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
1 page  
OPERATING NOTES
1. The clock input (Pin 5) should be capacitively coupled to
the signal source. The input signal path is completed by
coupling a capacitor from the internal bias decoupling, Pin 6 to
ground.
2. The output stage which is normally open collector (Pin 2
open circuit) can be interfaced to CMOS. The open collector
can be returned to a +10V line via a 5k resistor but the output
sink current should not exceed 2mA. If interfacing to TTL is
required then Pins 2 and 7 should be connected together to
give a fan-out = 1. This will increase supply current by
approximately 2mA.
3. The circuit will operate down to DC but a slew rate of better
than 20V/~s is required.
4. The mark space ratio of the output is approximately 1.2:1
at 200MHz.
SP8795
5. Input impedance is a function of frequency. See Fig.5.
6. If no signal is present the device will self-oscillate. If this is
undesirable it may be prevented by connecting a 150k
between unused input and ground. This reduces the input
sensitivity by typically 50-100mV p-p.
7. The internal regulator has its input connected to Pin 8,
while the internal reference voltage appears at Pin 7 and
should be decoupled. For use from a 5.2V supply, Pins 7 and
8 should be connected together, and 5.2V applied to these
pins. For operation from supply voltages in the range +6.8V to
+9.5V, Pins 7 and 8 should be separately decoupled, and the
supply voltage applied to Pin 8.
Figure 5 : Typical impedance. Test conditions: supply voltage 5.2V, ambient temperature 25°C, frequencies in
MHz, impedance normalised to 50 ohms.
VCC OF MODULUS
CONTROL DEVICE
CONTROL
INPUT
OUTPUT
18
27
SP8795
36
45
1n
1n
100n
VCC1
50
MONITOR
50
SIGNAL
SOURCE
Figure 6 : Toggle frequency test circuit
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet SP8795.PDF ] | |
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