ADC0803, ADC0804
Timing Diagrams
(Continued)
INTR RESET
INTR
CS
t
RI
RD
DATA
OUTPUTS
t
ACC
VALID
DATA
THREE-STATE
(HI-Z)
t
1H
, t
0H
VALID
DATA
FIGURE 10B. OUTPUT ENABLE AND RESET INTR
DIGITAL OUTPUT CODE
+1 LSB
+
1
/
2
LSB
0
-
1
/
2
LSB
-1 LSB
A-1
A
A+1
A-1
A
A+1
1
3
5
ERROR
D+1
D
D-1
5 6
3 4
1 2
* QUANTIZATION ERROR
2
4
6
ANALOG INPUT (V
IN
)
ANALOG INPUT (V
IN
)
TRANSFER FUNCTION
FIGURE 11A. ACCURACY =
±0
LSB; PERFECT A/D
ERROR PLOT
DIGITAL OUTPUT CODE
+1 LSB
5
ERROR
D+1
D
1
D-1
2
-1 LSB
A-1
A
A+1
A-1
A
2
A+1
4
3
4
6
1
3
0
6
*
QUANTIZATION
ERROR
ANALOG INPUT (V
IN
)
ANALOG INPUT (V
IN
)
TRANSFER FUNCTION
FIGURE 11B. ACCURACY =
±
1
/
2
LSB
ERROR PLOT
FIGURE 11. CLARIFYING THE ERROR SPECS OF AN A/D CONVERTER
7