ADC0803(2002) データシートの表示（PDF） - Intersil
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ADC0803 Datasheet PDF : 17 Pages
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ADC0803, ADC0804
Typical Performance Curves (Continued)
7
6
V+ = 4.5V
5
4
3
2
V+ = 5V
1
0
V+ = 6V
0
400
800
1200
1600
2000
fCLK (kHz)
FIGURE 6. FULL SCALE ERROR vs fCLK
16
VIN(+) = VIN(-) = 0V
14
ASSUMES VOS = 2mV
THIS SHOWS THE NEED
12
FOR A ZERO ADJUSTMENT
IF THE SPAN IS REDUCED
10
8
6
4
2
0
0.01
0.1
1.0
5
VREF/2 (V)
FIGURE 7. EFFECT OF UNADJUSTED OFFSET ERROR
8
V+ = 5V
7
DATA OUTPUT
BUFFERS
6
5
ISOURCE
VOUT = 2.4V
4
3
-ISINK
VOUT = 0.4V
2
-50 -25
0
25
50
75 100 125
TA AMBIENT TEMPERATURE (oC)
FIGURE 8. OUTPUT CURRENT vs TEMPERATURE
Timing Diagrams
1.6
fCLK = 640kHz
1.5
V+ = 5.5V
1.4
1.3
V+ = 5.0V
1.2
1.1
V+ = 4.5V
1.0
-50 -25
0
25
50
75 100 125
TA AMBIENT TEMPERATURE (oC)
FIGURE 9. POWER SUPPLY CURRENT vs TEMPERATURE
CS
WR
ACTUAL INTERNAL
STATUS OF THE
CONVERTER
tWI
tW(WR)I
(LAST DATA READ)
INTR
(LAST DATA NOT READ)
“BUSY”
“NOT BUSY”
1 TO 8 x 1/fCLK
INTERNAL TC
tVI
FIGURE 10A. START CONVERSION
DATA IS VALID IN
OUTPUT LATCHES
INTR
ASSERTED
1/2 fCLK
6
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