ATA5744N-TKSY 19 Atmel, ATA5744N-TKSY 19 Datasheet - Page 11

• Manufacturer Part Number: ATA5744N-TKSY 19
• Description: RF Receiver RF DATA CONTROL RECEIVER
• Manufacturer: Atmel
• Type: Receiverr

Specifications of ATA5744N-TKSY 19

• Package / Case: SSO-20
• Operating Frequency: 449 MHz
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Noise Figure: 7 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6. Digital Signal Processing
Figure 6-1.
Figure 6-2.
4893A–RKE–11/05
Dem_out
DATA
Dem_out
Data_out (DATA)
Synchronization of the Demodulator Output
Debouncing of the Demodulator Output
The data from the ASK demodulator (Dem_out) is digitally processed in different ways and as a
result converted into the output signal DATA. This processing depends on the selected baudrate
range (BR_Range).
extended basic clock cycle T
edge-to-edge time period tee_sig of the DATA signal as a result is always an integral multiple of
T
The minimum time period between two edges of the data signal is limited to tee_sig
This implies an efficient suppression of spikes at the DATA output. At the same time it limits the
maximum frequency of edges at DATA. This eases the interrupt handling of a connected
microcontroller.
XClk
T
t
DATA_min
.
XClk
t
ee
Figure 6-1 on page 11
t
ee_sig
XClk
t
DATA_min
. Data can change its state only after T
t
ee
illustrates how Dem_out is synchronized by the
t
DATA_min
XClk
t
ee
has elapsed. The
ATA5744
T
DATA_min
11
.