IC RCVR UHF ASK 433MHZ 20SSOP

ATA5744N-TKSY

Manufacturer Part NumberATA5744N-TKSY
DescriptionIC RCVR UHF ASK 433MHZ 20SSOP
ManufacturerAtmel
ATA5744N-TKSY datasheet
 

Specifications of ATA5744N-TKSY

Frequency300MHz ~ 450MHzSensitivity-112dBm
Data Rate - Maximum10 kBaudModulation Or ProtocolASK, FSK
ApplicationsRKE, Telemetering, Security TechnologyCurrent - Receiving7.1mA
Data InterfacePCB, Surface MountAntenna ConnectorPCB, Surface Mount
FeaturesRSSI EquippedVoltage - Supply4.5 V ~ 5.5 V
Operating Temperature-40°C ~ 105°CPackage / Case20-SOIC (0.200", 5.30mm Width)
Lead Free Status / RoHS StatusLead free / RoHS CompliantMemory Size-
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Table 4-1.
Each BR_Range is defined by a minimum and a maximum edge-to-edge time (tee_sig). These
limits are defined in the electrical characteristics. They should not be exceeded to maintain full
sensitivity of the receiver.
4.5
Receiving Characteristics
The RF receiver ATA5744 can be operated with and without a SAW front-end filter. In a typical
automotive application, a SAW filter is used to achieve better selectivity. The selectivity with and
without a SAW front-end filter is illustrated in
quency is reduced by 40 dB. The plots are printed relatively to the maximum sensitivity. If a
SAW filter is used, an insertion loss of about 4 dB must be considered.
When designing the system in terms of receiving bandwidth, the LO deviation must be consid-
ered as it also determines the IF center frequency. The total LO deviation is calculated to be the
sum of the deviation of the crystal and the XTO deviation of the ATA5744. Low-cost crystals are
specified to be within ±100 ppm. The XTO deviation of the ATA5744 is an additional deviation
due to the XTO circuit. This deviation is specified to be ±30 ppm. If a crystal of ±100 ppm is
used, the total deviation is ±130 ppm in that case. Note that the receiving bandwidth and the
IF-filter bandwidth are equivalent.
Figure 4-2.
ATA5744
8
Definition of BR_Range by the Pins BR_0 and BR_1
BR_1
BR_0
0
0
0
1
1
0
1
1
Figure 4-1 on page
Receiving Frequency Response
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-6.0
-5.0 -4.0
-3.0
-2.0
-1.0
df (MHz)
BR_Range
0
1
2
2
7. Note that the mirror fre-
without SAW
with SAW
0.0
1.0
2.0
3.0
4.0
5.0
6.0
4893A–RKE–11/05