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PDF AS3932 Data sheet ( Hoja de datos )
| Número de pieza | AS3932 | |
| Descripción | 3D Low Frequency Wakeup Receiver | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Data Sheet
AS3932
3D Low Frequency Wakeup Receiver
www.DataSheet4U.com
1 General Description
The AS3932 is a 3-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 device can operate using one, two, or three active channels.
The AS3932 provides a digital RSSI value for each active channel, it
supports a programmable data rate and Manchester decoding with
clock recovery. The AS3932 offers a real-time clock (RTC), which is
either derived from a crystal oscillator or the internal RC oscillator.
The programmable features of AS3932 enable to optimize its
settings for achieving a longer distance while retaining a reliable
wakeup generation. The sensitivity level of AS3932 can be adjusted
in presence of a strong field or in noisy environments.
The device is available in 16 pin TSSOP and QFN 4x4 16LD
packages.
2 Key Features
3-channel ASK wakeup receiver
Carrier frequency range 110 - 150 kHz
One, two, or three channel operation
Reliable 1-, 2- or 3-D wakeup pattern detection
Programmable wakeup pattern (16bits)
Doubling of wakeup pattern supported
Wakeup without pattern detection supported
Wakeup sensitivity 100 µVRMS (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 3-channel listening mode 1.7 µA (typ.)
Data rate adjustable from 0.5- 4 kbps (Manchester)
Manchester decoding with clock recovery
Digital RSSI values available for each channel
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 16LD
3 Applications
The AS3932 is ideal for Active RFID tags, Real-time location
systems, Operator identification, Access control, and Wireless
sensors.
www.austriamicrosystems.com/AS3932
Revision 1.2
1 - 33
1 page  
AS3932
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
LF3P
LF2P
1
2
3
4
5
6
7
8
AS3932
16 CL_DAT
15 DAT
14 WAKE
13 VSS
12 XOUT
11 XIN
10 LFN
9 LF1P
www.DataSheet4U.com
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
LF3P 7 AIO
LF2P 8 AIO
LF1P 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
Input antenna channel three
Input antenna channel two
Input antenna channel one
Common ground for antenna one, two and three
Crystal oscillator input
Crystal oscillator output
Substrate
Wakeup output IRQ
Data output
Manchester recovered clock
www.austriamicrosystems.com/AS3932
Revision 1.2
5 - 33
5 Page 
AS3932
Data Sheet - Detailed Description
www.DataSheet4U.com
8 Detailed Description
The AS3932 is a three-dimensional low power low-frequency wakeup receiver. The AS3932 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 AS3932 is made up by three independent receiving channels, 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 SPI. The real time clock can be based on a crystal oscillator or on an internal RC one. In case the
second is used to improve its accuracy a calibration can be performed.
8.1 Block Diagram
Figure 10. Block Diagram
LF1P
AS3932
Amp Out
Channel RSSI
Amplifier 1
LF2P
LF3P
Amp Out
Channel RSSI
Amplifier 2
Amp Out
Channel RSSI
Amplifier 3
LFN
Wakeup
Main
Logic
SDI
Channel
Selector
Envelope Detector /
Data Slicer
Manchester
Decoder
Correlator
I/V
Xtal RTC
RC RTC
Bias
IRQ
SCL
SDI
SDO
CS
DAT
CL_DAT
VCC
GND
XIN XOUT
www.austriamicrosystems.com/AS3932
Revision 1.2
11 - 33
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS3932.PDF ] | |
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