M16C80 Datasheet, PDF (238/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
28. Electrical characteristics
Table 28.3 A/D conversion characteristics (referenced to VCC = AVCC = VREF = 5V, Vss = AVSS = 0V at
Topr = 25^oC, f(XIN)=20MHZ unless otherwise specified)
Symbol
Parameter
Measurement Condition
Standard
Unit
Min. Typ. Max.
-
Resolution
VREF=VCC
10 Bits
-
Absolute accuracy (10 bits)
AN0 to AN7 input
VREF=VCC ^{ANEX0, ANEX1 input}
=5V
External op-amp
connection mode
±3 LSB
±7 LSB
Absolute accuracy (8 bits)
VREF=VCC=5V
±2 LSB
Absolute accuracy
(8 bits)
Sample & hold
function not available
VREF=VCC=3V, ∅ AD=fAD/2
±2 LSB
RLADDER
Ladder tesistance
VREF=VCC
10
40 kΩ
tCONV
Conversion time
(10 bits)
Sample & hold
function available
VREF=VCC=5V, ∅ AD=10MHz
3.3
µs
tCONV
Conversion time
(8 bits)
Sample & hold
function available
VREF=VCC=5V, ∅ AD=10MHz
2.8
µs
tCONV
Conversion time
(8 bits)
Sample & hold
function not available
VREF=VCC=3V, ∅ AD=fAD/2=5MHz
9.8
µs
tSAMP
Sampling time
0.3
µs
VREF
Reference voltage
VREF=VCC=4.2 to 5.5V
2.0
V
VREF=VCC=2.7 to 5.5V
2.7
V
VIA
Analog input voltage
0
VREF V
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 (ØAD) equal to or lower than 10 MHz. And divide the fAD if VCC is less than 4.2V, and
make AD operation clock frequency (ØAD) equal to or lower than fAD/2.
Note 2 :A case without sample & hold function turn AD operation clock frequency (ØAD) 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.
Table 28.4 D/A conversion characteristics (referenced to VCC = VREF = 5V, Vss = AVSS = 0V at Topr =
25^oC, f(XIN)=20MHZ unless otherwise specified)
Symbol
Parameter
Measuring condition
Standard
Min. Typ. Max. ^Unit
Resolution
Absolute accuracy
tsu
Setup time
RO
Output resistance
IVREF
Reference power supply input current
VREF = VCC = 5V(Note 1)
VREF = VCC = 3V(Note 1)
8 Bits
1.0 %
3 µs
4 10 20 ^kΩ
1.5 ^mA
1.0 ^mA
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.
Rev.1.00 Aug. 02, 2005 ^{Page 227} of 329
REJ09B0187-0100