AS3932
3D Low Frequency Wakeup Receiver
General Description
The AS3932 is a 3-channel low power ASK receiver that is able
to generate a wake-up 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 wake-up 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. 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 wake-up 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 16LD QFN (4×4)
packages.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS3932, 3D Low Frequency Wakeup
Receiver are listed below:
Figure 1:
Added Value of Using AS3932
Benefits
Enables low power active tags
Selectable carrier frequency
One, two, or three channel operation
Highly resistant to false wake-ups
Improved immunity to false wake-ups
Allows frequency only detection
Improved range with best-in-class sensitivity
Adjustable range
Provides tracking of false wake-ups
Ensures wake-up in a noise environment
Extended battery life
ams Datasheet
[v1-83] 2015-Mar-02
Features
3-channel ASK wake-up receiver
Carrier frequency range 110 - 150 kHz
1-D, 2-D, or 3-D wake-up pattern detection
16-bit programmable wake-up pattern
Supporting doubling of wake-up pattern
Wake-up without pattern detection selectable
Wake-up sensitivity 100μVRMS (typ.)
Sensitivity level adjustable
False wake-up counter
Periodical forced wake-up supported (1s – 2h)
Current consumption in 3-channel listening mode 1.7μA (typ.)
Page 1
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AS3932 −
General Description
Benefits
Flexible clock configuration
Operates from a 3V battery
Industrial temperature range
Features
RTC based 32 kHz XTAL, RC-OSC, or external clock
Operating supply range 2.4V – 3.6V (TA = 25°C)
Operation temperature range -40°C to +85°C
Applications
The AS3932 is ideal for:
• Active RFID tags,
• Real-time location systems,
• Operator identification,
• Access control, and
• Wireless sensors.
Figure 2:
AS3932 Typical Application Diagram with Crystal Oscillator
VCC
CBAT
CL
VCC
CS
XIN
TRANSMITTER
XTAL
Transmitting Antenna
XOUT
NC
DAT
X, Y, and Z Receiving Antennas
TX
LF1P
AS3932
WAKE
LF2P
SCL
LF3P
SDO
LFN
SDI
VSS
GND
Page 2
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ams Datasheet
[v1-83] 2015-Mar-02
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