ATA5811-PLQX Atmel, ATA5811-PLQX Datasheet - Page 8

• Manufacturer Part Number: ATA5811-PLQX
• Manufacturer: Atmel

Specifications of ATA5811-PLQX

• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 7mm
• Product Height (mm): 0.9mm
• Product Length (mm): 7mm
• Lead Free Status / Rohs Status: Compliant

Figure 6. Typical RKE Key Fob Application, 433.92 MHz, 2 Batteries
Typical Key Fob
Application, 2 Batteries
8
ATA5811/ATA5812 [Preliminary]
Loop antenna
AVCC
C
10
L
2
L
1
Figure 6 shows a typical 433.92 MHz 2-battery RKE key fob or sensor application. The
external components are 11 capacitors, 1 resistor, 2 inductors and a crystal. C
are 68 nF voltage supply blocking capacitors. C
capacitors for the internal voltage regulators. C
is a 15 nF fixed capacitor used for the internal quasi peak detector and for the highpass
frequency of the data filter. C
33 pF. L
120 nH. A load capacitor for the crystal of 9 pF is integrated. R
sets the output power to about 5.5 dBm.
C
C
5
C
C
11
8
9
R
1
1
is a matching inductor of about 5.6 nH to 56 nH. L
C
RF_IN
NC
NC
NC
NC
433_N868
NC
R_PWR
PWR_H
RF_OUT
NC
NC
7
C
1
ATA5811/ATA5812
+
+
C
2
7
Litihum Cells
to C
11
C
4
are RF matching capacitors in the range of 1 pF to
SDO_TMDO
DEM_OUT
SDI_TMDI
N_RESET
CDEM
VSINT
RSSI
IRQ
SCK
CLK
NC
CS
C
5
6
XTAL2
is a 10 nF supply blocking capacitor. C
2
and C
Microcontroller
C
3
VCC
13.25311 MHz
3
are 2.2 µF supply blocking
2
is a feed inductor of about
1
VSS
is typically 22 k and
4689B–RKE–04/04
1
and C
4
6