ATA5276-PGPW Atmel, ATA5276-PGPW Datasheet - Page 5

• Manufacturer Part Number: ATA5276-PGPW
• Description: IC TRANSMITTER TPM 125KHZ 20-QFN
• Manufacturer: Atmel

Specifications of ATA5276-PGPW

• Rf Type: TPM
• Frequency: 125kHz
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: ATA5276-PGPWCT

4.3
4.3.1
4.3.2
4909C–AUTO–01/07
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 ATA5276 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
ATA5276
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