ATA5275-PGQI 80 Atmel, ATA5275-PGQI 80 Datasheet - Page 5

• Manufacturer Part Number: ATA5275-PGQI 80
• Manufacturer: Atmel

Specifications of ATA5275-PGQI 80

• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

4.3
4.3.1
4.3.2
4739I–AUTO–01/06
Transmission Mode
ASK Modulation
Anti-bouncing Filter in Transmission Mode
Figure 4-3.
For the transmission of a wake-up signal or data to a receiver, the ATA5275 generates a
antenna resonance synchronized signal at the antenna driver output (DRV pin). A connected LC
antenna radiates a magnetic field. For the data transmission the field can be 100% amplitude
modulated by the DIO interface input. If a low level signal is applied at the DIO pin, the driver
generates a square wave signal DRV for the antenna. If a high level signal is applied at the DIO
pin the driver is stopped and switched to ground. In this way ASK modulated data can be trans-
mitted (see
Figure 4-4.
The DIO input signal is delayed for a anti-bouncing time.
The driver is switched on after a delay time of T
level continuously. The driver is switched-off after a delay time of T
level.
The T
pulses from the DIO Line.
Figure 4-5.
DH
COIL
time depends on the antenna resonance frequency, suppressing short disturbance
DRV
DIO
Figure
STBY After DIO = L
Data Transmission
Anti-bouncing
4-4).
STBY
DIO
TD_L
TOUT_L
DL
(typically 64 µs) if the DIO is pulled to a low
t
t
TD_H
DH
if the DIO is pulled to high
ATA5275
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