View AS3977_4318711.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Product Brief AS3977 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. 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.
PRODUCT BRIEF
3. Main Characteristics
-
2.0 - 3.6V power supply Power down current consumption 100 nA (3V, 25 o C) Output power up to +10dBm Occupied bandwidth 8.5 kHz (4.8 kb/s, FFSK, ARIB) Operating temperature range -40 o C to +85 o C
4. Additional Features
-
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
5. Applications
-
2. Key Features
- Compliant to ETSI EN 300-220, FCC CFR 47 part 15 -
Remote keyless entry systems Short range radio data transmission Domestic and consumer remote control units Cordless alarm systems Remote metering Low power telemetry
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
Revision No. 1.3, Date: 02-2007 Page 1 of 2 Copyright (c) 2007 austriamicrosystems. Trademarks registered (R). 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. To the best of its knowledge, austriamicrosystems asserts that the information contained in this publication is accurate and correct.
Product Brief AS3977
Block Diagram AS3977
Package, Pin-out and Marking
16 pin QFN4x4 16LD
16
15
14
13
1 PREOUT 16 VREGRF 2 PAOUT 15 VCCPA 3 nc 14 nc 4 VCCPLL 13 VSS 5 ENABLE 12 MCCLK 6 CLK 11 DATAIO 7 XTALIN 10 VDD 8 XTALOUT 9 VREGDIG ep GND AYWWXZ = Date Code and Plant ID
#1 2
AS3977 AYWWXZ
12 11 10
3 4
optional
9
5
6
7
8
Revision No. 1.3, Date: 02-2007 Page 2 of 2 Copyright (c) 2007 austriamicrosystems. Trademarks registered (R). 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. To the best of its knowledge, austriamicrosystems asserts that the information contained in this publication is accurate and correct.

▲Up To Search▲

Price & Availability of AS3977

	To Download AS3977 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .