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675
24.4
A/D Conversion Characteristics
Tables 24.10 and 24.11 list the A/D conversion characteristics.
Table 24.10 A/D Conversion Characteristics
(AN7 to AN0 Input: 134/266-State Conversion)
– Preliminary –
Condition A:V
CC = 5.0 V ± 10%, AVCC = 5.0 V ± 10%, VSS = AVSS = 0 V, = 2
MHz to maximum operating frequency, T
a = –20 to +75°C (regular
specifications), T
a = –40 to +85°C (wide-range specifications)
Condition B:V
CC = 4.0 V to 5.5 V, AVCC = 4.0 V to 5.5 V, VSS = AVSS = 0 V, = 2
MHz to maximum operating frequency, T
a = –20 to +75°C (regular
specifications), T
a = –40 to +85°C (wide-range specifications)
Condition C:V
CC = 2.7 V to 5.5 V*
5, AV
CC = 2.7 V to 5.5 V*
5, V
SS = AVSS = 0 V,
= 2 MHz to maximum operating frequency, T
a = –20 to +75°C
Condition A
Condition B
Condition C
20 MHz
16 MHz
10 MHz
Item
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
Resolution
10
Bits
Conversion time
—
6.7
—
8.4
—
13.4
s
Analog input
capacitance
——20
pF
Permissible signal-
source
——10*
3
——10*
3
——10*
1
k
impedance
5*
4
5*
4
5*
2
Nonlinearity error
—
±3.0
—
±3.0
—
±7.0
LSB
Offset error
—
±3.5
—
±3.5
—
±7.5
LSB
Full-scale error
—
±3.5
—
±3.5
—
±7.5
LSB
Quantization error
—
±0.5
—
±0.5
—
±0.5
LSB
Absolute accuracy
—
±4.0
—
±4.0
—
±8.0
LSB
Notes: 1. When 4.0 V
≤ AV
CC ≤ 5.5 V
2. When 2.7 V
≤ AV
CC < 4.0 V
3. When conversion time
≥ 11. 17 s (CKS = 1 and ≤ 12 MHz, or CKS = 0)
4. When conversion time < 11. 17 s (CKS = 1 and > 12 MHz)
5. For the low-voltage F-ZTAT version, V
CC = 3.0 V to 5.5 V and AVCC = 3.0 V to 5.5 V.