ATA5773-PXQW Atmel, ATA5773-PXQW Datasheet - Page 148

• Manufacturer Part Number: ATA5773-PXQW
• Description: XMITTR UHF ASK/FSK 310MHZ 24VQFN
• Manufacturer: Atmel

Specifications of ATA5773-PXQW

• Frequency: 310MHz ~ 350MHz
• Modulation Or Protocol: UHF
• Power - Output: 8dBm
• Voltage - Supply: 2 V ~ 4 V
• Current - Transmitting: 9.8mA
• Data Interface: PCB, Surface Mount
• Memory Size: 4kB Flash, 256B EEPROM, 256B SRAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
• Processor Series: ATA5x
• 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: 4 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Sensitivity: -
• Data Rate - Maximum: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Details

4.20.7.2
4.20.7.3
148
Atmel ATA5771/73/74
Analog Noise Canceling Techniques
ADC Accuracy Definitions
Figure 4-66. Analog Input Circuitry
Digital circuitry inside and outside the device generates EMI which might affect the accuracy of
analog measurements. If conversion accuracy is critical, the noise level can be reduced by
applying the following techniques:
An n-bit single-ended ADC converts a voltage linearly between GND and V
(LSBs). The lowest code is read as 0, and the highest code is read as 2
Several parameters describe the deviation from the ideal behavior:
• Offset: The deviation of the first transition (0x000 to 0x001) compared to the ideal transition
Figure 4-67. Offset Error
(at 0.5 LSB). Ideal value: 0 LSB.
a. Keep analog signal paths as short as possible. Make sure analog tracks run over
b. Use the ADC noise canceler function to reduce induced noise from the CPU.
c. If any port pins are used as digital outputs, it is essential that these do not switch
the analog ground plane, and keep them well away from high-speed switching digi-
tal tracks.
while a conversion is in progress.
ADCn
Output Code
Offset
Error
I
IH
I
IL
1..100 k
V
REF
Input Voltage
C
S/H
= 14 pF
Ideal ADC
Actual ADC
n
-1.
V
CC
REF
9137E–RKE–12/10
/2
in 2
n
steps