ATA5425-PLSW datasheet(9/100 Pages) ATMEL

9 / 100 page

4841D–WIRE–10/07

ATA5423/ATA5425/ATA5428/ATA5429

2.3

Typical Remote Control Unit Application, 2 Li Batteries (6V)

Figure 2-3 shows a typical 433.92 MHz 2 Li battery Remote Control Unit application. The exter-

nal components are 11 capacitors, 1 resistor, 2 inductors and a crystal. C

1 and C4 are 68 nF

voltage supply blocking capacitors. C

2 and C3 are 2.2 µF supply blocking capacitors for the inter-

nal voltage regulators. C

5 is a 10 nF supply blocking capacitor. C6 is a 15 nF fixed capacitor

used for the internal quasi-peak detector and for the high-pass frequency of the data filter. C

7 to

11 are RF matching capacitors in the range of 1 pF to 33 pF. L1 is a matching inductor of about

5.6 nH to 56 nH. L

2 is a feed inductor of about 120 nH. A load capacitor for the crystal of 9 pF is

integrated. R

1 is typically 22 kΩ and sets the output power to about 5.5 dBm.

Figure 2-3.

Typical Remote Control Unit Application, 433.92 MHz, 2 Li Batteries (6V)

RSSI

CDEM

SCK

DEM_OUT

SDI_TMDI

SDO_TMDO

ATA5423/ATA5425

ATA5428/ATA5429

CLK

VCC

VSS

Sensor

VSINT

XTAL2

+ Lithium cell

Loop antenna

AVCC

ATmega

48/88/168

13.25311 MHz

N_RESET

IRQ

RF_IN

C11

433_N868

RF_OUT

PWR_H

R_PWR

C10

+ Lithium cell

ATA5425-PLSW Datasheet(PDF) 9 Page - ATMEL Corporation

ATA5425-PLSW Datasheet(HTML) 9 Page - ATMEL Corporation

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