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Page 227
28. Electrical characteristics
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6
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Table 28.3 A/D conversion characteristics (referenced to VCC = AVCC = VREF = 5V, Vss = AVSS = 0V at
Topr = 25oC, f(XIN)=20MHZ unless otherwise specified)
Table 28.4 D/A conversion characteristics (referenced to VCC = VREF = 5V, Vss = AVSS = 0V at Topr =
25oC, f(XIN)=20MHZ unless otherwise specified)
k
Min.
Typ.
Max.
tsu
RO
Resolution
Absolute accuracy
Setup time
Output resistance
Reference power supply input current
Bits
%
mA
IVREF
1.0
1.5
8
3
Symbol
Parameter
Measuring condition
Unit
20
10
4
s
VREF = VCC = 5V(
Note 1)
Standard
Note 1: DO f(XIN) in range of main clock input oscillation frequency prescribed with recommended operating
conditions of table 28.2. Divide the fAD if f(XIN) exceeds 10 MHz, and make AD operation clock
frequency (AD) equal to or lower than 10 MHz. And divide the fAD if VCC is less than 4.2V, and
make AD operation clock frequency (AD) equal to or lower than fAD/2.
Note 2 : A case without sample & hold function turn AD operation clock frequency (AD) into 250 kHz or
more in addition to a limit of Note 1.
Note 3 : Connect AVCC pin to VCC pin and apply the same electric potential.
Note 1: This applies when using one D/A converter, with the D/A register for the unused D/A converter set to
"0016".
The A/D converter's ladder resistance is not included.
Also, when D/A register contents are not "0016" the current IVREF always flows even though Vref may
have been set to be unconnected by the A/D control register.
mA
1.0
VREF = VCC = 3V(
Note 1)
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