ATAVRDISPLAYX Atmel, ATAVRDISPLAYX Datasheet - Page 300

• Manufacturer Part Number: ATAVRDISPLAYX
• Description: KIT EVAL XMEGA DISPLAY
• Manufacturer: Atmel

Specifications of ATAVRDISPLAYX

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Silicon Manufacturer: Atmel
• Silicon Family Name: ATxmega
• Kit Contents: Board
• Features: Temperature Sensor, Mono Speaker Via Audio Amplifier
• Svhc: No SVHC (15-Dec-2010)
• Core Architecture: AVR
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25.10 ADC Input Model
8077H–AVR–12/09
Figure 25-18. ADC timing for free running mode
An analog voltage input must be able to charge the sample and hold (S/H) capacitor in the ADC
in order to achieve maximum accuracy. Seen externally the ADC input consists of a input chan-
nel (R
300
Figure 25-19. ADC input for single ended measurements
Figure 25-20. ADC input for differential measurements and differential measurements with gain
In order to achieve n bit accuracy, the source output resistance, R
ADC input resistance on a pin:
GAINSTAGE AMPLIFY
START CH0, wo/GAIN
START CH1, wo/GAIN
GAINSTAGE SAMPLE
START CH0, w/GAIN
START CH1, w/GAIN
CONV COMPLETE
Negative
and
Positive
Positive
ADC SAMPLE
input
input
input
channel
CLK
Figure 25-20 on page 300
ADC
) and the switch (R
1
0
2
switch
2
1
R
R
R
3
channel
channel
shows the ADC input channels.
channel
) resistance, and the S/H capacitor.
2
3
2
4
3
3
5
R
R
R
switch
switch
switch
0
6
2
1
7
source
2
, must be less than the
3
2
Figure 25-19 on page
8
C
C
C
Sample
3
Sample
Sample
XMEGA A
3
0
9
VCC/2
VCC/2
0
1
10
300