as3977 austriamicrosystems, as3977 Datasheet

as3977

Manufacturer Part Number

as3977

Description

As3977 Is A Low-power Fully Integrated Etsi, Fcc And Arib Compliant Fsk Transmitter

Manufacturer

austriamicrosystems

Datasheet

1.AS3977.pdf (2 pages)

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PRELIMINARY INFORMATION: SUBJECT TO CHANGE WITHOUT ANY NOTICE

Multi-Channel Narrowband FSK Transmitter

AS3977

Revision No. 1.3, Date: 02-2007

merged, translated, stored, or used without the prior written consent of the copyright owner. To the best of its knowledge,

austriamicrosystems asserts that the information contained in this publication is accurate and correct.

Product Brief AS3977

1. General Description

The AS3977 is a low-power fully integrated ETSI, FCC

and ARIB compliant FSK transmitter capable of operating

at any ISM frequency in the range of 300 to 928 MHz. It is

based on a sigma-delta controlled fractional-N synthesiser

phase locked loop with fully integrated voltage controlled

oscillator. The power amplifier output is programmable

and can deliver output power ranging from –20dBm up to

+10dBm. An on-chip low drop-out regulator is available in

case an accurate output power independent of voltage

supply variation is required.

The output signal can be shaped using a programmable

Gaussian filter to minimise the occupied bandwidth and

adjacent channel power. The maximum data rate can be

up to 100 kb/s – depending on the required filtering.

The FSK frequency deviation is programmable up to a

maximum of 64kHz.

The crystal oscillator can handle a wide range of

frequencies. For narrow-band applications a temperature

sensor with digital read-out is included that allows

compensation of the crystal frequency drift due to

temperature variation.

The AS3977 is connected to an external microcontroller

via a bi-directional digital interface. The device operates

at very low current consumption with a power supply

range from 2.0V to 3.6V and can be powered down when

not in use.

The device is fabricated in austriamicroystems advanced

0.35um SiGe-BiCMOS technology.

2. Key Features

Compliant to ETSI EN 300-220, FCC CFR 47 part 15

and ARIB STD-T67

Multi-channel with narrow bandwidth

300 – 928 MHz operating frequency range (ISM)

Filtered FSK

Data rate up to 100 kb/s

FSK deviation programmable up to 64kHz

Extremely low power consumption

3. Main Characteristics

4. Additional Features

5. Applications

2.0 – 3.6V power supply

Power down current consumption 100 nA (3V, 25

Output power up to +10dBm

Occupied bandwidth 8.5 kHz (4.8 kb/s, FFSK, ARIB)

Operating temperature range -40

Sigma-Delta controlled fractional-N synthesiser

Resolution of synthesiser <100Hz

Fully integrated PLL

Fully integrated voltage controlled oscillator

4kV ESD protection (1.5kV for analogue pins)

Automatic antenna tuning

12 – 20 MHz crystal oscillator

On-chip temperature sensor with digital readout for AFC

purposes

Integrated Manchester coder

Digital lock detector

Low drop-out regulator

Bi-directional serial interface

Remote keyless entry systems

Short range radio data transmission

Domestic and consumer remote control units

Cordless alarm systems

Remote metering

Low power telemetry

C to +85

PRODUCT BRIEF

Page 1 of 2

Related parts for as3977

as3977 Summary of contents

Page 1

... PRELIMINARY INFORMATION: SUBJECT TO CHANGE WITHOUT ANY NOTICE Multi-Channel Narrowband FSK Transmitter AS3977 1. General Description The AS3977 is a low-power fully integrated ETSI, FCC and ARIB compliant FSK transmitter capable of operating at any ISM frequency in the range of 300 to 928 MHz based on a sigma-delta controlled fractional-N synthesiser phase locked loop with fully integrated voltage controlled oscillator ...

Page 2

... Product Brief AS3977 Block Diagram AS3977 Package, Pin-out and Marking 16 pin QFN4x4 16LD 1 PREOUT 16 2 PAOUT VCCPLL 13 5 ENABLE 12 6 CLK 11 7 XTALIN 10 8 XTALOUT 9 ep GND AYWWXZ = Date Code and Plant ID Revision No. 1.3, Date: 02-2007 Copyright © 2007 austriamicrosystems. Trademarks registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner ...

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