ATA8742-PXQW Atmel, ATA8742-PXQW Datasheet - Page 12

• Manufacturer Part Number: ATA8742-PXQW
• Description: MCU W/TRANSMITTER ASK/FSK 24QFN
• Manufacturer: Atmel

Specifications of ATA8742-PXQW

• Frequency: 433MHz
• Applications: Home Automation, Remote Sensing, RKE
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 32 kBit/s
• Power - Output: 7.5dBm
• Current - Transmitting: 9.8mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Memory Size: 4kB Flash, 256B EEPROM, 256B SRAM
• Voltage - Supply: 2 V ~ 4 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
• Processor Series: ATA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Data Ram Size: 256 B
• Interface Type: SPI, USI
• Maximum Clock Frequency: 8.1 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Details

8. Application
12
ATA8742
For the supply-voltage blocking capacitor C
are used to match the loop antenna to the power amplifier, where C
C
achieve a better tolerance value and to have the possibility of realizing the Z
standard valued capacitors.
Together with the pins and the PCB board wires C
presses the 1
suppression is achieved when C
The loop antenna should not exceed a width of 1.5 mm, otherwise the Q-factor of the loop
antenna is too high.
L
load resonance frequency of the crystal. Normally, a value of 12 pF results for a 15 pF
load-capacitance crystal.
Figure 8-1.
1
2
(50 nH to 100 nH) can be printed on PCB. C
is 6 pF/NP0 (10 pF + 15 pF in series); for C
GND
VS
st
ESD Protection Circuit
harmonic, hence the position of C
CLK
1
is placed as close as possible to the pins ANT1 and ANT2.
PA_ENABLE
3
, a value of 68 nF/X7R is recommended. C
4
2
should be selected that the XTO runs on the
1
two capacitors in series should be used to
on the PCB is important. Normally the best
1
forms a series resonance loop that sup-
ANT1
ANT2
1
XTAL
typically is 8.2 pF/NP0 and
ENABLE
Load,opt
9151A–INDCO–07/09
by using
1
and C
2