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PDF AS3930 Data sheet ( Hoja de datos )
| Número de pieza | AS3930 | |
| Descripción | Single Channel Low Frequency Wakeup Receiver | |
| Fabricantes | austria microsystems | |
| Logotipo |  |
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Data Sheet
AS3930
Single Channel Low Frequency Wakeup Receiver
1 General Description
The AS3930 is a single-channel low power ASK receiver that is able
to generate a wakeup upon detection of a data signal which uses a
LF carrier frequency between 110 - 150 kHz. The integrated
correlator can be used for detection of a programmable 16-bit
wakeup pattern.
The AS3930 provides a digital RSSI value, it supports a
programmable data rate and Manchester decoding with clock
recovery. The AS3930 offers a real-time clock (RTC), which is either
derived from a crystal oscillator or the internal RC oscillator.
The programmable features of AS3930 enable to optimize its
settings for achieving a longer distance while retaining a reliable
wakeup generation. The sensitivity level of AS3930 can be adjusted
in presence of a strong field or in noisy environments.
The device is available in 16 pin TSSOP and QFN 4x4 16 LD
packages.
2 Key Features
Single channel ASK wakeup receiver
Carrier frequency range 110 - 150 kHz
Programmable wakeup pattern (16bits)
Doubling of wakeup pattern supported
Wakeup without pattern detection supported
Wakeup sensitivity 100µVRMS (typ.)
Adjustable sensitivity level
Highly resistant to false wakeups
False wakeup counter
Periodical forced wakeup supported (1s – 2h)
Low power listening modes
Current consumption in listening mode 1.37 µA (typ.)
Data rate adjustable from 0.5 - 4 kbps (Manchester)
Manchester decoding with clock recovery
Digital RSSI
Dynamic range 64dB
5 bit RSSI step (2dB per step)
RTC based on 32kHz XTAL, RC-OSC, or external clock
Operating temperature range -40 to +85ºC
Operating supply voltage 2.4 - 3.6V (TA = 25ºC)
Bidirectional serial digital interface (SDI)
Package option 16 pin TSSOP, QFN 4x4 16 LD
3 Applications
The AS3930 is ideal for Active RFID tags, real-time location
systems, operator identification, access control, and wireless
sensors.
www.austriamicrosystems.com/AS3930
Revision 1.0
1 - 33
Free Datasheet http://www.datasheet4u.com/
1 page  
AS3930
Data Sheet - Pin Assignments
4 Pin Assignments
4.1 TSSOP Package
Figure 4. Pin Assignments 16 pin TSSOP Package
CS
SCL
SDI
SDO
VCC
GND
NC
NC
1
2
3
4
5
6
7
8
AS3930
16 CL_DAT
15 DAT
14 WAKE
13 VSS
12 XOUT
11 XIN
10 LFN
9 LFP
4.1.1 Pin Descriptions
Table 1. Pin Descriptions 16 pin TSSOP Package
Pin Name
Pin
Number
Pin Type
CS 1 DI
SCL 2 DI
SDI 3 DI
SDO 4 DO_T
VCC 5
GND 6
S
S
NC 7
NC 8
LFP 9 AIO
LFN 10 AIO
XIN 11 AIO
XOUT 12 AIO
VSS
WAKE
13
14
S
DO
DAT 15 DO
CL_DAT
16
DO
Description
Chip select
SDI interface clock
SDI data input
SDI data output (tristate when CS is low)
Positive supply voltage
Negative supply voltage
Not Connected
Not Connected
Input antenna
Antenna ground
Crystal oscillator input
Crystal oscillator output
Substrate
Wakeup output IRQ
Data output
Manchester recovered clock
www.austriamicrosystems.com/AS3930
Revision 1.0
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Free Datasheet http://www.datasheet4u.com/
5 Page 
AS3930
Data Sheet - Detailed Description
8 Detailed Description
The AS3930 is a one-dimensional low power low-frequency wakeup receiver. The AS3930 is capable to detect the presence of an inductive
coupled carrier and extract the envelope of the On-Off-Keying (OOK) modulated carrier. In case the carrier is Manchester coded the clock is
recovered from the transmitted signal and the data can be correlated with a programmed pattern. If the detected pattern corresponds to the
stored one, a wake-up signal (IRQ) is risen up. The pattern correlation can be bypassed in case and the wake-up detection is based only on the
frequency detection.
The AS3930 is made up of a single receiving channel, one envelop detector, one data correlator, one Manchester decoder, 8 programmable
registers with the main logic and a real time clock.
The digital logic can be accessed by an SDI. The real time clock can be based on a crystal oscillator or on an internal RC. In case internal RC is
used to improve its accuracy a calibration can be performed.
8.1 Block Diagram
Figure 10. Block Diagram
AS3930
LF1P
RSSI
Channel
Amplifier
Wakeup
Main
Logic
Envelope Detector /
Data Slicer
SDI
Correlator
IRQ
SCL
SDI
SDO
CS
Manchester
Decoder
DAT
CL_DAT
LFN
VCC
I/V
Bias
GND
Xtal RTC
XIN XOUT
RC RTC
www.austriamicrosystems.com/AS3930
Revision 1.0
11 - 33
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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| PDF Descargar | [ Datasheet AS3930.PDF ] | |
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