Si4136/Si4126
I S M R F S
Y N T H E S I ZE R
W
I T H
I
N T E G R A T E D
V C O
S
F
O R
W
I R E LE S S
C
O M M U N I C A T I O N S
Features
Dual-band RF synthesizers
2300 MHz to 2500 MHz
RF2: 2025 MHz to 2300 MHz
RF1:
IF synthesizer
62.5
MHz to 1000 MHz
Integrated VCOs, loop filters,
varactors, and resonators
Minimal external components
required
Low phase noise
5 µA standby current
25.7 mA typical supply current
2.7 V to 3.6 V operation
Packages: 24-pin TSSOP,
28-lead QFN
Lead-free/RoHS-compliant options
Ordering Information:
See page 29.
available
Pin Assignments
Applications
Si4136-BT/GT
ISM and MMDS band
communications
Wireless LAN and WAN
Dual-band communications
SCLK
SDATA
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
SEN
VDDI
IFOUT
GND
IFLB
IFLA
GND
VDDD
GND
XIN
PWDN
AUXOUT
Description
The Si4136 is a monolithic integrated circuit that performs both IF and RF
synthesis for wireless communications applications. The Si4136 includes
three VCOs, loop filters, reference and VCO dividers, and phase detectors.
Divider and powerdown settings are programmable through a three-wire
serial interface.
GND
NC
GND
NC
GND
GND
Functional Block Diagram
Reference
Amplifier
Power
Down
Control
GND
RFOUT
XIN
÷1/÷2
R
RF1
Phase
Detect
RF1
VDDR
PWDN
N
RF1
R
RF2
Phase
Detect
2
RFOUT
Si4136-BM/GM
SDATA
IFOUT
SCLK
VDDI
GND
SEN
GND
SDATA
SCLK
SEN
Serial
Interface
22-bit
Data
Register
RF2
28 27 26 25 24 23 22
GND
GND
N
RF2
R
IF
Phase
Detect
2
1
2
3
4
5
6
7
8
GND
21
20
19
GND
IFLB
IFLA
GND
VDDD
GND
XIN
AUXOUT
Test
Mux
IFDIV
IF
IFOUT
NC
GND
GND
18
17
16
15
N
IF
IFLA
IFLB
NC
GND
GND
9
GND
10 11 12 13 14
AUXOUT
RFOUT
PWDN
VDDR
GND
Patents pending
Rev. 1.41 1/10
Copyright © 2010 by Silicon Laboratories
Si4136/Si4126
Si4136/Si4126
2
Rev. 1.41
Si4136/Si4126
T
ABLE O F
C
ONTENTS
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.4. Output Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5. PLL Loop Dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.6. RF and IF Outputs (RFOUT and IFOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.7. Reference Frequency Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.8. Powerdown Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.9. Auxiliary Output (AUXOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4. Pin Descriptions: Si4136-BT/GT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5. Pin Descriptions: Si4136-BM/GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7. Si4136 Derivative Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
8. Package Outline: Si4136-BT/GT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9. Package Outline: Si4136-BM/GM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Rev. 1.41
3
Si4136/Si4126
1. Electrical Specifications
Table 1. Recommended Operating Conditions
Parameter
Ambient Temperature
Supply Voltage
Supply Voltages Difference
Symbol
T
A
V
DD
V
(V
DDR
– V
DDD
),
(V
DDI
– V
DDD
)
Test Condition
Min
–40
2.7
–0.3
Typ
25
3.0
—
Max
85
3.6
0.3
Unit
°C
V
V
Note:
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.
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. 1.41
Si4136/Si4126
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
25.7
15.7
15
10
1
—
—
—
—
—
—
Max
31
19
18
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. 1.41
5
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