AS3977B-BQFM

AS3977B-BQFM Datasheet

AS3977

Part	Datasheet
AS3977B-BQFM	AS3977B-BQFM (pdf)

Related Parts	Information
AS3977B-BQFT	AS3977B-BQFT
AS3977B-BQFS	AS3977B-BQFS

PDF Datasheet Preview
Data Sheet AS3977 Multi-Channel Narrowband FSK Transmitter 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 sigmadelta controlled fractional-N synthesizer phase locked loop PLL with fully integrated voltage controlled oscillator VCO . The power amplifier PA output is programmable and can deliver power ranging from up to +10dBm. An on-chip low drop-out LDO 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 minimize 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 64 kHz. 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 bidirectional 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 0.35µm SiGe-BiCMOS technology. 2 Key Features Fully integrated UHF transmitter Compliant to ETSI EN 300-220, FCC CFR47 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 Main Characteristics 3.6V power supply Power down current consumption 100 nA 3V, 25ºC Output power up to +10dBm Occupied bandwidth 6 kHz kb/s, FFSK, ARIB -40 to 85ºC temperature range Additional Features Sigma-Delta controlled fractional-N synthesizer Resolution of synthesizer < 100Hz Fully integrated PLL Fully integrated voltage controlled oscillator VCO 4kV ESD protection 1.5kV for the Analog pins 12 20 MHz crystal oscillator On-chip temperature sensor with digital readout for AFC purposes Fast frequency hopping with predefined channel selection Microcontroller clock output to save addition crystal Constant output power over battery life time Integrated Manchester coder Digital lock detector Low drop-out regulator Bi-directional serial interface Low Power Down Mode current consumption 3 Applications The AS3977 is suitable for Remote keyless entry systems, Short range radio data transmission, Domestic and consumer remote control units, Cordless alarm systems, Remote metering, and Low power telemetry. 1 - 47 AS3977 Data Sheet - Applications Figure AS3977 Block Diagram VCCPLL VCC PA XTAL IN XTAL OUT MC CLK DATA I/O CLOCK ENABLE ÷4 CLK Gen Baudrate Gen. ÷T Deviation Data sync. Phase Charge Loop detector pump filter VCO RF Band RFchannel Synthesizer Pre Amplifier Driving amplifier 11 Package Drawings and 44 12 Ordering 46 4 - 47 AS3977 Data Sheet - Pin Assignments 4 Pin Assignments Figure Pin Assignments Top View VREGRF VCCPA GND VSS 16 15 14 13 PREOUT 1 12 MCCLK PAOUT 2 GND 3 AS3977 11 DATAIO 10 VDD VCCPLL 4 9 VREGDIG ENABLE CLK XTALIN XTALOUT Pin Descriptions Table Pin Descriptions Pin Name Pin Number PREOUT Type PREOUT Open Collector preamplifier output, need a feeding coil connected to VREGRF or VDD and is the input for the Power amplifier PAOUT Open Collector power amplifier output, need a feeding coil PAOUT connected to VREGRF or VDD PREOUT RESERVED Must be connected to GND VCCPLL Positive Power Pin Positive supplies of VCO, for optimum performance, add decoupling capacitors on this Pin. ENABLE EN ABLE Digital CMOS level input, internal Pull down resistor > 60k 5 - 47 AS3977 Data Sheet - Pin Assignments Updated Ordering Information page 46 Updated Ordering Information page 46 45 - 47 AS3977 Data Sheet - Ordering Information 12 Ordering Information The devices are available as the standard products shown in Table Ordering Information Device ID AS3977-TPD Part Number AS3977B-BQFS AS3977B-BQFT Dry Pack sensitivity Level =3 according IPC/JEDEC J-STD-033A. Where T=Temperature range: degree P=Package Type: QF=QFN D=Delivery Form S=Tray in DryPack T=Tape and Reel Delivery Form1 Tray Tape and Reel Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at Package QFN16 4x4 QFN16 4x4 46 - 47 AS3977 Data Sheet - Copyrights Copyrights Copyright 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. 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. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 47 - 47

PDF Datasheet Preview

Data Sheet

AS3977

Multi-Channel Narrowband FSK Transmitter
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 sigmadelta controlled fractional-N synthesizer phase locked loop PLL with fully integrated voltage controlled oscillator VCO . The power amplifier PA output is programmable and can deliver power ranging from up to +10dBm. An on-chip low drop-out LDO 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 minimize 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 64 kHz.

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 bidirectional 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 0.35µm SiGe-BiCMOS technology.
2 Key Features

Fully integrated UHF transmitter

Compliant to ETSI EN 300-220, FCC CFR47 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

Main Characteristics
3.6V power supply Power down current consumption 100 nA 3V, 25ºC Output power up to +10dBm Occupied bandwidth 6 kHz kb/s, FFSK, ARIB -40 to 85ºC temperature range

Additional Features

Sigma-Delta controlled fractional-N synthesizer Resolution of synthesizer < 100Hz Fully integrated PLL Fully integrated voltage controlled oscillator VCO 4kV ESD protection 1.5kV for the Analog pins 12 20 MHz crystal oscillator On-chip temperature sensor with digital readout for AFC purposes Fast frequency hopping with predefined channel selection Microcontroller clock output to save addition crystal Constant output power over battery life time Integrated Manchester coder Digital lock detector Low drop-out regulator Bi-directional serial interface Low Power Down Mode current consumption
3 Applications

The AS3977 is suitable for Remote keyless entry systems, Short range radio data transmission, Domestic and consumer remote control units, Cordless alarm systems, Remote metering, and Low power telemetry.
1 - 47

AS3977

Data Sheet - Applications

Figure AS3977 Block Diagram

VCCPLL

VCC PA

XTAL IN XTAL OUT

MC CLK

DATA I/O CLOCK ENABLE
÷4 CLK Gen Baudrate Gen.
÷T Deviation

Data sync.

Phase Charge Loop detector pump filter VCO

RF Band

RFchannel

Synthesizer

Pre Amplifier

Driving amplifier
11 Package Drawings and 44 12 Ordering 46
4 - 47

AS3977

Data Sheet - Pin Assignments
4 Pin Assignments

Figure Pin Assignments Top View

VREGRF VCCPA GND VSS
16 15 14 13

PREOUT 1
12 MCCLK

PAOUT 2 GND 3

AS3977
11 DATAIO 10 VDD

VCCPLL 4
9 VREGDIG

ENABLE CLK

XTALIN XTALOUT

Pin Descriptions

Table Pin Descriptions

Pin Name

Pin Number

PREOUT

Type

PREOUT

Open Collector preamplifier output, need a feeding coil connected to VREGRF or VDD and is the input for the Power amplifier

PAOUT

Open Collector power amplifier output, need a feeding coil

PAOUT
connected to VREGRF or VDD

PREOUT

RESERVED

Must be connected to GND

VCCPLL

Positive Power Pin

Positive supplies of VCO, for optimum performance, add decoupling capacitors on this Pin.

ENABLE

EN ABLE

Digital CMOS level input, internal Pull down resistor > 60k
5 - 47

AS3977

Data Sheet - Pin Assignments
Updated Ordering Information page 46
Updated Ordering Information page 46
45 - 47

AS3977
Data Sheet - Ordering Information
12 Ordering Information
The devices are available as the standard products shown in Table Ordering Information

Device ID AS3977-TPD

Part Number AS3977B-BQFS AS3977B-BQFT

Dry Pack sensitivity Level =3 according IPC/JEDEC J-STD-033A.

Where T=Temperature range:
degree P=Package Type:

QF=QFN D=Delivery Form

S=Tray in DryPack T=Tape and Reel

Delivery Form1 Tray

Tape and Reel

Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect:

For further information and requests, please contact us or find your local distributor at

Package QFN16 4x4 QFN16 4x4
46 - 47

AS3977

Data Sheet - Copyrights

Copyrights

Copyright 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. 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. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
47 - 47

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS3977B-BQFM Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3977B-BQFM 519733