Si2200
RF S
YNTHESIZER WITH
I
NTEGRATED
VCO
S
FOR
S
ATELLITE
R
ADIO
Features
!
Dual-band RF synthesizers
"
"
!
!
!
!
!
!
RF1: 2300 to 2500 MHz
RF2: 2025 to 2300 MHz
62.5 to 1000 MHz
!
!
IF synthesizer
"
Integrated VCOs, loop filters,
varactors, and resonators
Minimal external components
required
Low phase noise
5 µA standby current
25.7 mA typical supply current
2.9 to 3.6 V operation
28-lead QFN
"
Ordering Information:
See page 28.
Lead-Free and RoHS Compliant
Applications
!
Pin Assignments
Satellite Radio
Si2200-GM
Description
The Si2200 is a monolithic integrated circuit that performs both IF and RF
synthesis for wireless communications applications. The Si2200 includes
three VCOs, loop filters, reference and VCO dividers, and phase
detectors. Divider and powerdown settings are programmable through a
three-wire serial interface.
SDATA
IFOUT
SCLK
VDDI
GND
SEN
GND
28 27 26 25 24 23 22
GND
GND
NC
1
2
3
4
5
6
7
8
GND
21
20
19
GND
IFLB
IFLA
GND
VDDD
GND
XIN
Functional Block Diagram
GND
NC
GND
GND
18
17
16
15
XIN
Reference
Amplifier
Power
Down
Control
÷1/÷2
÷
R
RF1
Phase
Detect
RF1
GND
9
GND
10 11 12 13 14
AUXOUT
PWDN
RFOUT
VDDR
GND
PWDN
÷
N
RF1
÷
R
RF2
Phase
Detect
÷
2
RFOUT
SDATA
SCLK
SEN
Serial
Interface
22-bit
Data
Register
RF2
÷
N
RF2
÷
R
IF
Phase
Detect
÷
2
Patents pending
IFDIV
IFOUT
AUXOUT
Test
Mux
IF
÷
N
IF
IFLA
IFLB
Rev. 1.0 5/05
Copyright © 2005 by Silicon Laboratories
Si2200
Si2200
T
A B L E O F
C
O N T E N TS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.1. Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2. Setting the IF VCO Center Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3. Self-Tuning Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4. Output Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5. PLL Loop Dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.6. RF and IF Outputs (RFOUT and IFOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.7. Reference Frequency Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.8. Powerdown Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.9. Auxiliary Output (AUXOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4. Pin Descriptions: Si2200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6. Package Outline: Si2200-GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Rev. 1.0
3
Si2200
1. Electrical Specifications
Table 1. Recommended Operating Conditions
1,2
Parameter
Ambient Operating Temperature
Ambient Functional Temperature
Supply Voltage
Supply Voltages Difference
Symbol
T
A
T
F
V
DD
V
∆
(V
DDR
– V
DDD
),
(V
DDI
– V
DDD
)
Test Condition
Min
–40
–40
2.9
–0.3
Typ
25
25
3.3
—
Max
85
95
3.6
0.3
Unit
°C
°C
V
V
Notes:
1.
All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions.
Typical values apply at nominal supply voltages and an operating temperature of 25 °C unless otherwise stated.
2.
Minimum and maximum specifications are not guaranteed across the functional temperature range.
Table 2. Absolute Maximum Ratings
1,2
Parameter
DC Supply Voltage
Input Current
3
Input Voltage
3
Storage Temperature Range
Symbol
V
DD
I
IN
V
IN
T
STG
Value
–0.5 to 4.0
±10
–0.3 to V
DD
+0.3
–55 to 150
Unit
V
mA
V
o
C
Notes:
1.
Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation
should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
2.
This device is a high performance RF integrated circuit with an ESD rating of < 2 kV. Handling and assembly of this
device should only be done at ESD-protected workstations.
3.
For signals SCLK, SDATA, SEN, PWDN, and XIN.
4
Rev. 1.0
Si2200
Table 3. DC Characteristics
(V
DD
= 2.7 to 3.6 V, T
A
= –40 to 85 °C)
Parameter
Total Supply Current
1
RF1 Mode Supply Current
1
RF2 Mode Supply Current
1
IF Mode Supply Current
1
Standby Current
High Level Input Voltage
2
Low Level Input Voltage
2
High Level Input Current
2
Low Level Input Current
2
High Level Output Voltage
3
Low Level Output Voltage
3
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
V
IH
= 3.6 V,
V
DD
= 3.6 V
V
IL
= 0 V,
V
DD
=
3.6 V
I
OH
= –500 µA
I
OH
= 500 µA
PWDN = 0
Symbol
Test Condition
RF1 and IF operating
Min
—
—
—
—
—
0.7 V
DD
—
–10
–10
V
DD
–0.4
—
Typ
28.7
19.5
18.5
10
1
—
—
—
—
—
—
Max
35
24
23
12
—
—
0.3 V
DD
10
10
—
0.4
Unit
mA
mA
mA
mA
µA
V
V
µA
µA
V
V
Notes:
1.
RF1
=
2.4 GHz, RF2
=
2.1 GHz, IFOUT
=
800 MHz, LPWR
=
0.
2.
For signals SCLK, SDATA, SEN, and PWDN.
3.
For signal AUXOUT.
Rev. 1.0
5
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