ADC0803, ADC0804
Typical Performance Curves (Continued)
16
14
7
6
5
4
3
2
1
0
V
= V
IN(-)
= 0V
= 2mV
IN(+)
ASSUMES V
OS
V+ = 4.5V
THIS SHOWS THE NEED
FOR A ZERO ADJUSTMENT
IF THE SPAN IS REDUCED
12
10
8
6
V+ = 5V
4
2
V+ = 6V
1600 2000
0
0
400
800
f
1200
(kHz)
0.01
0.1
1.0
5
V
/2 (V)
CLK
REF
FIGURE 6. FULL SCALE ERROR vs f
FIGURE 7. EFFECT OF UNADJUSTED OFFSET ERROR
CLK
8
1.6
V+ = 5V
f
= 640kHz
V+ = 5.5V
CLK
7
6
5
4
3
2
1.5
1.4
1.3
1.2
DATA OUTPUT
BUFFERS
I
V
SOURCE
OUT
= 2.4V
V+ = 5.0V
-I
SINK
1.1
1.0
V+ = 4.5V
100
V
= 0.4V
0
OUT
-50
-25
25
50
75
o
100
125
-50
-25
0
25
50
75
125
o
T
AMBIENT TEMPERATURE ( C)
A
T
AMBIENT TEMPERATURE ( C)
A
FIGURE 8. OUTPUT CURRENT vs TEMPERATURE
FIGURE 9. POWER SUPPLY CURRENT vs TEMPERATURE
Timing Diagrams
CS
WR
t
WI
“BUSY”
ACTUAL INTERNAL
STATUS OF THE
CONVERTER
t
W(WR)I
DATA IS VALID IN
“NOT BUSY”
OUTPUT LATCHES
1 TO 8 x 1/f
CLK
INTERNAL T
C
(LAST DATA READ)
INTR
INTR
(LAST DATA NOT READ)
ASSERTED
1
t
VI
/
f
CLK
2
FIGURE 10A. START CONVERSION
6
INTERSIL [ Intersil ]
