M16C6S_09 Datasheet, PDF (185/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
IT800AFE (Analog Front End)
About DAC (Digital to Analog Converter)
DAC of built-in in M16C/6S is current output type 10 bit DAC.The standard level of output current can
be set up by the external resistance linked to a built-in standard power supply. A DAC circuit and a load
circuit are shown in Figure 1.23.2. The typical characteristic is shown in Table 1.23.1.
10 bit DAC
D9-D0
DATA
10
Matrix
Current
Cell
Iout
7
Rout
Cout
2.1k(1%) 33pF
Vref
+
-
6
Ioutc
Routc
Coutc
2.1k(1%) 33pF
Rext ⁸
External pin (pin number)
LSI internal connection
Rext
2.1k(1%)
IFULL(mA)=2131/Rext(‰)
=Iout+Ioutc
At Rext=2.1k‰, IFULL=1mA
Line
Driver
Amp
Figure 1.23.2 DAC (Digital to Analog Converter)
Table 1.23.1 DAC Electrical Characteristics (Vdd=3.3±0.3V, Ta = -20 to 85°C/-40 to 85°C/-40 to 105°C
unless otherwise specified)
Parameter
Symbol
Condition
Electrical Characteristics
Unit
Min
Typ
Max
Standard voltage
Vref
Rext=2.1kΩ
0.3
V
Standard current
Iref
Rext=2.1kΩ
0.14
mA
External standard register
Rext
2.1
kΩ
DAC output register
Rout/Routc Rext=2.1kΩ
2.0
kΩ
Full-scale current
IFULL
Rext=2.1kΩ
0.9
1
1.1
mA
Maximum output voltage
Voutmax Rout/Routc=2.1kΩ
Vdd-1
V
Rev.5.01 Dec 10, 2009 page 185 of 201
REJ03B0014-0501