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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9947 Datasheet

AISG Integrated Transceiver

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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
Benefits 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
TEMP
RANGE
PIN-PACKAGE
TOP
MARK
MAX9947ETE+
-40°C to
+105°C
16 TQFN-EP*
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
DIR
RXOUT
RES BIAS
ANALOG
SWITCH
+7dBm TO +12dBm
1.5V
TXOUT
BANDPASS FILTER
SYNCOUT
DIRECTION
DETECTION
STATE MACHINE
REF
-15dBm
MAX9947
RXIN
OOK
GND
DEMODULATOR
BANDPASS FILTER
19-5029; Rev 4; 4/16


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX9947 Datasheet

AISG Integrated Transceiver

No Preview Available !

MAX9947
AISG Integrated Transceiver
Absolute Maximum Ratings
VCC to GND.............................................................-0.3V to +6V
VL to GND................................................................-0.3V to +6V
TXOUT, BIAS to GND............................... -0.3V to (VCC + 0.3V)
RXIN, XTAL1, XTAL2, SYNCOUT, RES to GND.....-0.3V to +6V
TXIN, RXOUT, DIR, DIRMD1,
DIRMD2 to GND....................................... -0.3V to (VL + 0.3V)
Output Short-Circuit Current TXOUT,
SYNCOUT to VCC or GND.....................................Continuous
All Other Pins Max In/Out Current.................................... ±20mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (derate 17.5mW/°C).............................1399mW
Operating Temperature Range.......................... -40°C to +105°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)........57.2°C/W
Junction-to-Case Thermal Resistance (θJC)................40°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(VCC = 5V, VL = 3.3V, TXOUT connected with 50Ω to RXIN, 4.1kΩ resistor between BIAS and RES, 10kΩ resistor between RES and
GND, 1kΩ resistor between SYNCOUT and VCC, TA = TMIN to TMAX, unless otherwise specified. XTAL frequency 8.704MHz ±30ppm.
Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITION
DC CHARACTERISTICS
Supply Voltage
VCC
Guaranteed by PSRR
Supply Current
ICC
TA ≤ 85°C
TA > 85°C
Logic Supply Voltage
Logic Supply Current
Receiver Power-Supply
Rejection Ratio
VL
IL
PSRR
Guaranteed by logic supply current
VTXIN = 3.3V
3.0V ≤ VCC ≤ 5.5V, VTXIN = 3.3V
(Note 3)
Output Power-Supply
Rejection Ratio
3.0V ≤ VCC ≤ 5.5V, VTXIN = 0V
(Note 4)
LOGIC INPUTS AND OUTPUTS
Logic-Input High Threshold
Voltage
VIH DIRMD1, DIRMD2, TXIN
Logic-Input Low Threshold
Voltage
VIL DIRMD1, DIRMD2, TXIN
Logic-Output High Threshold
Voltage
VOH
RXOUT, DIR source 3.3mA
Logic-Output Low Threshold
Voltage
VOL RXOUT, DIR sink 3.3mA
TXIN shorted to GND or VL
Input Leakage Current
IIH, IIL
DIRMD1, DIRMD2
Shorted to GND
Shorted to VL
SYNC INPUT (XTAL1) AND OUTPUT (SYNCOUT)
Input High Threshold Voltage
VXTAL1_IH
MIN TYP MAX UNITS
3.0 5.5
23 35
27 40
1.6 5.5
138 380
49 60
49 60
V
mA
V
µA
dB
dB
0.7 x VL
0.9 x VL
-1
0.7 x
VCC
0.3 x VL
0.1 x VL
±1
+60
V
V
V
V
µA
V
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX9947
Description AISG Integrated Transceiver
Maker Maxim Integrated Products
Total Page 17 Pages
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