ATA5811_06 ATMEL [ATMEL Corporation], ATA5811_06 Datasheet - Page 7
![no-image](/images/no-image-200.jpg)
ATA5811_06
Manufacturer Part Number
ATA5811_06
Description
UHF ASK/FSK TRANSCEIVER
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA5811_06.pdf
(92 pages)
- Current page: 7 of 92
- Download datasheet (2Mb)
3. Typical Car or Sensor Base-station Application
Figure 3-1.
4689F–RKE–08/06
Typical RKE Car or Sensor Base-station Application, 433.92 MHz
connector
RF
50
L
4
OUT
AVCC
C
L
11
2
SAW-Filter
Figure 3-1
application. The external components are 12 capacitors, 1 resistor, 4 inductors, a SAW filter and
a crystal. C
supply blocking capacitors for the internal voltage regulators. C
capacitor. C
highpass frequency of the data filter. C
to 33 pF. L
tal of 9 pF is integrated. R
10 dBm. Since a quarter wave or PCB antenna, which has high efficiency and wide band opera-
tion, is typically used here, it is recommended to use a SAW filter to achieve high sensitivity in
case of powerful out-of-band blockers. L
needed to filter out the harmonics in the transmitted signal to meet regulations. An internally reg-
ulated voltage at pin VSOUT can be used in case the microcontroller only supports 3.3V
operation, a blocking capacitor with a value of C
any case.
C
10
C
L
1
5
R
L
1
2
3
shows a typical 433.92 MHz V
1
to L
6
C
C
and C
is a 15 nF fixed capacitor used for the internal quasi peak detector and for the
8
9
4
are matching inductors of about 5.6 nH to 56 nH. A load capacitor for the crys-
C
3
7
NC
NC
NC
RF_IN
NC
433_N868
NC
R_PWR
PWR_H
RF_OUT
NC
NC
to C
4
are 68 nF voltage supply blocking capacitors. C
1
ATA5811/ATA5812
is typically 22 k and sets the output power at RF_OUT to about
C
1
C
V CC = 4.75V to 5.25V
2
7
to C
C
1
CC
, C
4
SDO_TMDO
C
11
= 4.75V to 5.25V RKE car or sensor base-station
DEM_OUT
10
SDI_TMDI
12
N_RESET
are RF matching capacitors in the range of 1 pF
and C
CDEM
VSINT
12
RSSI
SCK
CLK
IRQ
NC
CS
= 2.2 µF has to be connected to VSOUT in
C
13.25311 MHz
6
9
XTAL2
together form a lowpass filter, which is
ATA5811/ATA5812
C
3
5
Microcontroller
is a 10 nF supply blocking
VCC
2
VSS
and C
12
are 2.2 µF
7
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