ATA5749 ATMEL Corporation, ATA5749 Datasheet

ATA5749

Manufacturer Part Number

ATA5749

Description

Fractional-n PLL Transmitter IC

Manufacturer

ATMEL Corporation

Datasheet

1.ATA5749.pdf (26 pages)

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Manufacturer

Quantity

Price

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Part Number:

ATA5749C-6DQY-64

Manufacturer:

MICROCHIP

Quantity:

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Company:

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ATA5749C-6DQY-64

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Features

•

Benefits

•

1. Description

The ATA5749 is a fractional-N-PLL transmitter IC for 300 MHz to 450 MHz operation

and is especially targeted for Tire Pressure Sensor Gauges, Remote Keyless Entry,

and Passive Entry and other automotive applications. It operates at data rates up to

40 kbit/s Manchester for ASK and FSK with a typical 5.5 dBm output power at 7.3 mA.

Transmitter parameters such as output power, output frequency, FSK deviation, and

current consumption can be programmed using the SPI interface. This fully integrated

PLL transmitter IC simplifies RF board design and results in very low material costs.

Fully Integrated Fractional-N PLL

ASK and Closed Loop FSK Modulation

Output Power Up to +12.5 dBm from 300 MHz to 450 MHz

Current Consumption is Scaled by Output Power Programming

Fast Crystal Oscillator Start-up Time of Typically 200 µs

Low Current Consumption of Typically 7.3 mA at 5.5 dBm

Only One 13.0000 MHz Crystal for 314.1 MHz to 329.5 MHz and 424.5 MHz to 439.9 MHz

Operation

Single Ended RF Power Amplifier Output

Many Software Programmable Options Using SPI:

Data Rate Up to 40 kbit/s (Manchester)

2 KV HBM ESD Protection Including XTO

Operating Temperature Range of –40°C to +125°C

Supply Voltage Range of 1.9V to 3.6V

TSSOP10 Package

Robust Crystal Oscillator with Fast Start Up and High Reliability

Lower Inventory Costs and Reduced Part Number Proliferation

Longer Battery Lifetime

Supports Multi-channel Operation

Wide Tolerance Crystal Possible with PLL Software Compensation

– Output Power from –0.5 dBm to +12.5 dBm

– RF Frequency from 300 MHz to 450 MHz with Different Crystals

– FSK Deviation with 396 Hz Resolution

– CLK Output Frequency 3.25 MHz or 1.625 MHz

Fractional-N

PLL Transmitter

ATA5749

Preliminary

9128C–RKE–10/08

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