3851 Group (Built-in 24 KB or more ROM)
A-D converter characteristics
Table 31 A-D converter characteristics
(VCC = 2.7 to 5.5 V, VSS = AVSS = 0 V, Ta = –20 to 85 °C, f(XIN) = 8 MHz, unless otherwise noted)
Symbol
Parameter
Test conditions
Min.
–
Resolution
–
tCONV
Absolute accuracy (excluding quantization error)
Conversion time
High-speed mode,
Middle-speed mode
Low-speed mode
RLADDER
Ladder resistor
IVREF
Reference power source input current VREF “on” VREF = 5.0 V
50
VREF “off”
II(AD)
A-D port input current
Limits
Typ.
40
35
150
0.5
Max.
10
±4
61
200
5.0
5.0
Unit
bit
LSB
tc(φ)
µs
kΩ
µA
µA
Rev.1.01 Oct 15, 2003 page 83 of 89