Datasheet > MAX9947_11

MAX9947_11

更新时间： 2024-11-15 11:14:07

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描述
AISG Integrated Transceiver AISG-Compliant Output Emission Profile

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MAX9947_11 数据手册

ABRIDGED

19-5029; Rev 2; 6/11

AISG Integrated Transceiver

General Description

The MAX9947 is an AISG-compliant, fully integrated

transceiver.

Features

S Receiver Wide Input Dynamic Range

-15dBm to +5dBm in 50I

S Variable Transmitter Output Level from +7dBm to

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.

+12dBm

S AISG-Compliant Output Emission Profile

S AutoDirection Output

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.

S No Need of Microcontrollers to Handle Bus

Arbitration in Tower-Mounted Equipment

S Supports All AISG Data Rates

9.6kbps

38.4kbps

115.2kbps

The MAX9947 also features a direction output to facilitate

the RS-485 bus arbitration in tower-mounted equipment.

S Bandpass Filter Compliant with AISG Protocol

Centered Around 2.176MHz

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.

S 3.0V to 5.5V Voltage Supply

S Independent Logic Supply

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

Applications

Base Stations

Ordering Information

TEMP

RANGE

TOP

MARK

Tower Equipment

PART

PIN-PACKAGE

-40NC to

+85NC

MAX9947ETE+

16 TQFN-EP*

AHF

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

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

dissipation.

Functional Diagram

RES

BIAS

1.5V

+7dBm TO +12dBm

XTAL1

TXOUT

ANALOG

SWITCH

XTAL2

TXIN

BANDPASS FILTER

DIRMD1

DIRMD2

SYNCOUT

MAX9947

DIRECTION

DETECTION

REF

DIR

STATE MACHINE

-15dBm

RXOUT

RXIN

OOK

BANDPASS FILTER

DEMODULATOR

GND

_______________________________________________________________ Maxim Integrated Products

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.

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