D/A Conversion Characteristics; Usage Note (Internal Voltage Step Down For The H8S/2398, H8S/2394, H8S/2392, And H8S/2390) - Renesas H8S Series Hardware Manual

22.1.5

D/A Conversion Characteristics

Table 22-10 lists the D/A conversion characteristics.
Table 22-10 D/A Conversion Characteristics
Conditions: V = AV
CC CC
φ = 10 to 20 MHz, T
T = –40 to +85°C (wide-range specifications)
a
Item
Resolution
Conversion time
Absolute accuracy
22.2 Usage Note (Internal Voltage Step Down for the H8S/2398, H8S/2394, H8S/2392, and
H8S/2390)
The H8S/2398, H8S/2394, H8S/2392, or H8S/2390 have a voltage step down circuit that automatically lowers the power
supply voltage, inside the microcomputer, to an adequate level. A capacitor (one 0.47-µF capacitor or two 0.47-µF
capacitors connected in parallel) should be connected between the V
and V pin to stabilize the internal voltage. Figure 22-32 shows how to connect the capacitor. Do not connect the V
SS
power-supply to the V
CL
in the usual way.)
Rev.6.00 Oct.28.2004 page 702 of 1016
REJ09B0138-0600H
= 5.0 V ± 10%, V
= 4.5 V to AV
ref
= –20 to +75°C (regular specifications),
a
Min
8
—
—
—
pin. Doing so could permanently damage the LSI. (Connect the V
An external capacitor to
stabilize the internal voltage
One 0.47-µF capacitor
or two 0.47-µF capacitors
connected in parallel
Do not connect the V
CC
Doing so could permanently damage the LSI.
(Connect the V power-supply to the other V
CC
Use a multilayer ceramic capacitor (one 0.47-µF capacitor or two
0.47-µF capacitors connected in parallel) for this circuit, and place it/them
near the V pin.
CL
Figure 22-32 V
, V = AV
CC SS SS
Typ Max
8 8
— 10
±1.0 ±1.5
±1.0
—
pin (a pin for internal voltage step down circuit)
CL
V
CL
V
SS
power-supply to the V
CL
CC
Capacitor Connection Method
CL
= 0 V,
Unit Test Conditions
bits
µs
20-pF capacitive load
LSB 2-MΩ resistive load
LSB 4-MΩ resistive load
power-supply to the V
CC
pin.
pin in the usual way.)
CC
pin,
CC