Micro Linear ML2712 2.4ghz fhss radio chipset Datasheet

product
BRIEF
2.4GHz FHSS Radio Chipset
Very Small Form Factor
3 Wire Interface
802.11 Compatible
10µs Tx-Rx Switching
Auto Aligning Discriminator
ML2712
2.4GHz Radio Transceiver
ML2713
Radio IF Transceiver
ML2731
PA Bias Controller
Features
ML2712
1LO and 2LO VCO and PLL
On-Chip
1LO and 2LO Tank Circuits
Off-Chip
Directly Modulated VCO
Transmitter
PLL Programming with 3 Wire
IF
Operation to 2.5GHz
48 Pin TQFP Package
ML2713
Image Reject Up - Convert
Mixer On-Chip
Receive Down - Convert Mixer
On-Chip
Integrated Discriminator and
Filter Alignment Circuits
High Signal to Noise at
Discriminator Output
Received Signal Strength
Indication Output
On-Chip DAC Generates
Modulated IF
Low Noise Regulator Output
48 Pin TQFP Package
ML2731
PA Current Control
10MHz - 40MHz Frequency
Range
Fast Start Negative Voltage
Generator
On-Chip Regulators
16 Pin TSSOP Package
2.4GHz FHSS Radio Chipset
The 2.4GHz radio chipset is targeted at the IEEE802.11 Frequency Hopping Spread Spectrum
standard. Two devices; ML2712 2.4GHz RF Transceiver and the ML2713 IF Transceiver implement
a very highly integrated, easy to use radio with a low cost bill of materials. The transmit path
includes a DAC and IF up converter in the ML2713 followed by an integrated transmit PLL, 2.4GHz
mixer and directly modulated VCO in the ML2712. The result is accurate digital generation of
the modulated signal for 802.11 compatibility and maintenance of adequate transmitter range even
without RF bandpass filters. The dual conversion receiver features high dynamic range and support
for the 4G FSK/2Mbps requirement of 802.11 standard. The chipset also inplements a self aligning
descriminator adjusted with every frequency hop.
An optional ML2731 PA Bias Controller completes the set.
Block Diagram
VPA
PA on/off switch
and current sense
ML2731
PAEN
ICON
VBIAS
Bias Control
NEGEN
VNEG
C1
C2
XIN
Crystal
Oscillator
Negative voltage
generator
Crystal
XOUT
Sine & square
wave drivers
Voltage
Regulator
REGO
SINO
PDN
CLKO
R. C.
Loop
Filter
RSSI
Input
ML2712
Transmit
Power
Amplifier
WB Charge
Pump/WB
Phase Comp
+
–
DAC
2LO VCO
2LO Loop
Filter &
Tank Circuit
PLL 2
LPF
Lock
Detect
PLL 1
Baseband
IC
1LO Loop
Filter &
Tank Circuit
x2
1LO VCO
MUX
Image Reject Rx IF
Downconverter
32MHz
Clock
Reference
Frequency
Input
Data Filter
Tx Regulator
Output
ML2713
Tx Regulator
Output
Image Reject Tx
DC IF Upconverter
Reg
Discriminator
RSSI
Limiter
Quad &
Filter
Auto Align
Control
Circuits
Control
Interface
DC
Restore
DAC
Rx Out
+
–
D/A Input
Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness of the contents of this publication and reserves the right to make changes to specifications and product
descriptions at any time without notice. No license, express or implied, by estoppel or otherwise, to any patents or other intellectual property rights is granted by this document. The circuits contained in this
document are offered as possible applications only. Particular uses or applications may invalidate some of the specifications and/or product descriptions contained herein. The customer is urged to perform its
own engineering review before deciding on a particular application. Micro Linear assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear
products including liability or warranties relating to merchantability, fitness for a particular purpose, or infringement of any intellectual property right. Micro Linear products are not designed for use in medical,
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