M37517F8HP Datasheet, PDF (91/98 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

7517 Group
Table 28 A/D converter characteristics
(VCC = 3.0 to 3.6 V, VSS = AVSS = 0 V, Ta = –20 to 85 °C, f(XIN) = 4MHz, f(XCIN) = 32 kHz, unless otherwise noted)
Symbol
–
–
tCONV
RLADDER
IVREF
II(AD)
Parameter
Test conditions
Resolution
Absolute accuracy (excluding quantization error)
Conversion time
High-speed mode,
middle-speed mode
Low-speed mode
Ladder resistor
Reference power source input current VREF “on” VREF = 3.3 V
VREF “off”
A/D port input current
Limits
Min.
Typ.
Max.
10
±4
61
40
35
40
100
140
5.0
0.5
5.0
Unit
bit
LSB
tc(φ)
µs
kΩ
µA
µA
µA
Table 29 Current integrator electrical characteristics
(VCC = AVCC = 3.3 V ±2 %, VSS = AVSS = 0V, Ta = –20 to 85 °C, f(XIN) = 4 MHz, f(XCIN) = 32 kHz)
Symbol
Parameter
t INF
Integrate period
V ISENS1 ISENS1 input range
t CAL
Caribration time
t CONV INF AD conversion time at AD conversion connection mode
AD
Integrate coefficient of integrator for discharge
AC
Integrate coefficient of integrator for charge
t RD
Reset time of integrator for discharge
t RC
Reset time of integrator for charge
b'
Count value at 0V input
V REFD Internal reference voltage for discharge integrator
V REFC Internal reference voltage for charge integrator
–
linearity error after reset time caribration
Test conditions
Min.
–0.2
15.625
12
0.68
0.68
VCC = 3.3 V ±2 %
Ta = 0 to 60 °C
VCC = 3.3 V ±2 %
Ta = -20 to 85 °C
–2400
0.09
–0.11
Limits
Typ.
125
15
1.00
1.00
300
300
0.1
–0.1
Max.
0.2
125
18
1.35
1.35
2400
0.11
–0.09
1
Unit
ms
V
ms
µs
µV•sec
µV•sec
ns
ns
–
V
V
%
3
%
2.45V
Integrator output 1.65V
0.85V
Discharge signal for
the integrator
AD conversion signal
tINF
tRD, tRC
Fig. 84 Current integrator timing diagram
Rev.1.01 Aug 02, 2004 page 91 of 96
tINF
tCAL
tRD,
tRD, tRC
tRC
tRD, tRC
tCONVINF
tRD, tRC
tCONVINF
Note : All signals are internals.