SKY72301-22 Datasheet, PDF (16/21 Pages) Skyworks Solutions Inc. – Spur-Free, 1.0 GHz Dual Fractional-N Frequency Synthesizer

DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER
Table 5. SKY72301-22 Signal Descriptions (2 of 2)
Pin #
Pin Name
Type
Description
17 GNDxtal
Power and ground Crystal oscillator ground.
18 LD/PSaux
Analog output
Programmable output pin. Indicates auxiliary phase detector out-of-lock as an active low pulsing open
collector output (high impedance when lock is detected), or helps the loop filter steer the auxiliary VCO.
This pin is configured using the Phase Detector/Charge Pumps Control Register.
19 VCCcp_aux (Note 1) Power and ground Auxiliary charge pump supply, 3 to 5 V. Removing power safely powers down the associated divider chain
and charge pump.
20 CPout_aux
Analog output
Auxiliary charge pump output. The gain of the auxiliary charge pump phase detector is controlled by the
Phase Detector/Charge Pumps Control Register.
21 GNDcp_aux (Note 1) Power and ground Auxiliary charge pump ground.
22 Fvco_aux
Input
Auxiliary VCO complimentary differential input.
23 Fvco_aux
Input
Auxiliary VCO differential input.
24 VCCcml_aux
(Note 1)
Power and ground ECL/CML, 3 V. Removing power safely powers down the associated divider chain and charge pump.
25 GNDdigital (Note 1) Power and ground Digital ground.
26 VCCdigital (Note 1) Power and ground Digital 3 V.
27 Data
Digital input
Serial address and data input pin. Address bits are followed by data bits.
28 CS
Digital input
Active low enable pin. Enables loading of address and data on the Data pin on the rising edge of Clock.
When CS goes high, data is transferred to the register indicated by the address. Subsequent clock edges
are ignored.
Note 1: Associated pairs of power and ground pins must be decoupled using 0.1 µF capacitors.
Table 6. Absolute Maximum Ratings
Parameter
Min
Max
Units
Maximum analog RF supply voltage
3.6
VDC
Maximum digital supply voltage
3.6
VDC
Maximum charge pump supply voltage
5.25
VDC
Storage temperature
–65
+150
°C
Operating temperature
–40
+85
°C
Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal values.
Table 7. Recommended Operating Conditions
Parameter
Analog RF supplies
Digital supply
Charge pump supplies
Operating temperature (TA)
Min
Max
Units
2.7
3.3
VDC
2.7
3.3
VDC
2.7
5.0
VDC
–40
+85
°C
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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May 21, 2007 • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • 200706B