Rev. 1.41 1/10 Copyright © 2010 by Silicon Laboratories Si4136/Si4126
Si4136/Si4126
ISM RF SYNTHESIZER WITH INTEGRATED VCOS
FOR WIRELESS COMMUNICATIONS
Features
Applications
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.
Functional Block Diagram
ƒÞ Dual-band RF synthesizers
ƒÜƒnRF1: 2300 MHz to 2500 MHz
ƒÜƒnRF2: 2025 MHz to 2300 MHz
ƒÞ IF synthesizer
ƒÜƒn62.5 MHz to 1000 MHz
ƒÞ Integrated VCOs, loop filters,
varactors, and resonators
ƒÞ Minimal external components
required
ƒÞ Low phase noise
ƒÞ 5 ìA standby current
ƒÞ 25.7 mA typical supply current
ƒÞ 2.7 V to 3.6 V operation
ƒÞ Packages: 24-pin TSSOP,
28-lead QFN
ƒÜƒnLead-free/RoHS-compliant options
available
ƒÞ ISM and MMDS band
communications
ƒÞ Wireless LAN and WAN
ƒÞ Dual-band communications
IFOUT
IFLA
IFLB
RFOUT
XIN
PWDN
SDATA
SCLK
SEN
IF
RF2
RF1
AUXOUT
Phase
Detect
Phase
Detect
„i2
„i2
Phase IFDIV
Detect
Test
Mux
22-bit
Data
Register
Serial
Interface
Power
Down
Control
Reference
Amplifier „iRRF1
„iRRF2
„iRIF
„iNRF1
„iNRF2
„iNIF
÷1/÷2
Patents pending
Ordering Information:
See page 29.
Pin Assignments
Si4136-BT/GT
Si4136-BM/GM
SCLK
SDATA
GND
GND
NC
GND
NC
GND
GND
GND
RFOUT
VDDR
SEN
VDDI
IFOUT
GND
IFLB
IFLA
GND
VDDD
GND
XIN
PWDN
AUXOUT
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
SCLK
SDATA
GND
GND
NC
NC
GND
GND
RFOUT
VDDR SEN
VDDI
IFOUT
GND
IFLB
IFLA
GND
VDDD
GND
XIN
PWDN
AUXOUT
21
20
19
18
17
16
15
8 9 10 11 12 13 14
28 27 26 25 24 23 22
1
2
3
4
5
6
7
GND
GND
GND GND
GND
GND
GND