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DACREF 数据表(PDF) 10 Page - ATMEL Corporation

部件名 DACREF
功能描述  32-Bit AVR UC3 C Series Schematic Checklist
PDF  30 Pages
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制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

DACREF 数据表(HTML) 10 Page - ATMEL Corporation

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AVR32768
32157A-AVR-12/10
Table 7-2.
ADC single-ended external voltage reference, 3.3V power supply mode.
Signal name
Recommended pin connection
Description
ADCREF0
1.0V to 2.6V
Single-ended external voltage reference
ADCREF1
1.0V to 2.6V
Single-ended external voltage reference
Figure 7-2.
Single-ended external reference, 5V power supply mode.
ADCREF0
ADCREF1
DC/DC
converter
1.0 to 3.5 V
DC/DC
converter
1.0 to 3.5 V
Table 7-3.
ADC single-ended external voltage reference, 5V power supply mode.
Signal name
Recommended pin connection
Description
ADCREF0
1.0V to 3.5V
Single-ended external voltage reference
ADCREF1
1.0V to 3.5V
Single-ended external voltage reference
7.2.2 ADC differential external reference pins (ADCVREFP/ADCVREFN)
In order to use the internal 1V bandgap reference, the ADCVREFP and ADCVREFN
pins must be used with decoupling capacitors (see Figure 7-3 and Table 7-5 for
typical values).
If the internal voltage reference is unused, ADCVREFP and ADCVREFN can be used
as differential external voltage reference (see Figure 7-4 and Table 7-5).
Figure 7-3.
ADCVREFP/ADCVREFN external decoupling for use of internal bandgap
reference.
Table 7-4.
ADC differential external voltage reference, internal reference used.
Signal name
Recommended pin connection
Description
ADCVREFP
Positive differential voltage
Differential external voltage reference
ADCVREFN
Negative differential voltage
Differential external voltage reference



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