MAX9947 Maxim Integrated Products, MAX9947 Datasheet

MAX9947

Manufacturer Part Number

MAX9947

Description

AISG Integrated Transceiver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX9947.pdf (1 pages)

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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 pro-

file. 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 +85°C

temperature range.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

19-5029; Rev 0; 12/09

Base Stations

Tower Equipment

_______________________________________________________________ Maxim Integrated Products 1

General Description

DIRMD1

DIRMD2

RXOUT

XTAL1

XTAL2

TXIN

GND

DIR

STATE MACHINE

Applications

DETECTION

DIRECTION

AISG Integrated Transceiver

ANALOG

SWITCH

-15dBm

REF

RES

+7dBm TO +12dBm

DEMODULATOR

OOK

S Receiver Wide Input Dynamic Range

S Variable Transmitter Output Level from +7dBm to

S AISG-Compliant Output Emission Profile

S Autodirection Output

S No Need of Microcontrollers to Handle Bus

S Supports All AISG Data Rates

S Bandpass Filter Compliant with AISG Protocol

S 3.0V to 5.5V Voltage Supply

S Independent Logic Supply

S Small, 3mm x 3mm 16-Pin TQFN Package

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad. Connect EP to GND to enhance thermal

dissipation.

MAX9947ETE+

+12dBm

Arbitration in Tower-Mounted Equipment

Centered Around 2.176MHz

-15dBm to +5dBm in 50I

9.6kbps

38.4kbps

115.2kbps

BIAS

PART

MAX9947

BANDPASS FILTER

1.5V

RANGE

-40NC to

+85NC

TEMP

Ordering Information

Functional Diagram

TXOUT

SYNCOUT

RXIN

16 Thin QFN-EP*

PIN-PACKAGE

Features

MARK

TOP

AFH

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