MAX9947ETE データシートの表示（PDF） - Maxim Integrated
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MAX9947ETE Datasheet PDF : 17 Pages
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EVALUATION KIT AVAILABLE
MAX9947
AISG Integrated Transceiver
General Description
The MAX9947 is an AISG-compliant, fully integrated
transceiver.
The MAX9947 receiver offers a typical dynamic range of
20dB and integrates a bandpass filter that operates in the
2.176MHz frequency with a narrow 200kHz bandwidth.
The MAX9947 transmitter integrates a bandpass filter that
is compliant with the AISG spectrum emission profile. It
can modulate OOK signals up to 115.2kbps. The output
power can be varied with external resistors from +7dBm
to +12dBm to compensate for loss in the external circuitry
and cabling.
The MAX9947 also features a direction output to facilitate
the RS-485 bus arbitration in tower-mounted equipment.
The MAX9947 is available in a small, 3mm x 3mm 16-pin
TQFN and is rated for operation in the -40°C to +105°C
temperature range.
Applications
● Base Stations
● Tower Equipment
Functional Diagram
Beneits and Features
● Receiver Wide Input Dynamic Range
• -15dBm to +5dBm in 50Ω
● Variable Transmitter Output Level from +7dBm to
+12dBm
● AISG-Compliant Output Emission Profile
● AutoDirection Output
● No Need of Microcontrollers to Handle Bus
Arbitration in Tower-Mounted Equipment
● Supports All AISG Data Rates
• 9.6kbps
• 38.4kbps
• 115.2kbps
● Bandpass Filter Compliant with AISG Protocol
Centered Around 2.176MHz
● 3.0V to 5.5V Voltage Supply
● Independent Logic Supply
● Small, 3mm x 3mm 16-Pin TQFN Package
Ordering Information
PART
MAX9947ETE+
TEMP
RANGE
-40°C to
+105°C
PIN-PACKAGE
16 TQFN-EP*
TOP
MARK
AHF
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad. Connect EP to GND to enhance thermal
dissipation.
VL
VCC
XTAL1
XTAL2
TXIN
DIRMD1
DIRMD2
RES
BIAS
ANALOG
SWITCH
+7dBm TO +12dBm
1.5V
TXOUT
BANDPASS FILTER
SYNCOUT
DIRECTION
DIR
DETECTION
STATE MACHINE
REF
-15dBm
MAX9947
RXOUT
RXIN
OOK
GND
DEMODULATOR
BANDPASS FILTER
19-5029; Rev 4; 4/16
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