Rainbow Electronics MAX1495 - Manual (Page 19)

Transfer Functions
Figures 15–18 show the MAX1491/MAX1493s’ transfer
functions. The transfer function for the MAX1493/
MAX1495 with AIN+ - AIN-
≥ 0 and RANGE = GND is:
The transfer function for the MAX1493 with AIN+ - AIN-
< 0 and RANGE = GND is:
The transfer function for the MAX1491 with AIN+ - AIN-
≥ 0 and RANGE = GND is:
The transfer function for the MAX1491 with AIN+ - AIN-
< 0 and RANGE = GND is:
The transfer function for the MAX1493/MAX1495 with
AIN+ - AIN-
≥ 0 and RANGE = DV
DD is:
The transfer function for the MAX1493 with AIN+ - AIN-
< 0 and RANGE = DV
DD is:
The transfer function for the MAX1491 with AIN+ - AIN-
≥ 0 and RANGE = DV
DD is:
The transfer function for the MAX1491 with AIN+ - AIN-
< 0 and RANGE = DV
DD is:
Counts
V V
V V
AIN AIN
REF REF
= Ч Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч +
+
+
1 024 2000 10 1 .
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч Ч
+
+
1 024 2000 10 .
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч +
+
+
1 024 20 000 10 1 . ,
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч Ч
+
+
1 024 20 000 10 . ,
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч Ч
⎛
⎝⎜ ⎞
⎠⎟
+
+
+
1 024 2000 1 .
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч
+
+
1 024 2000 .
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч Ч
⎛
⎝⎜ ⎞
⎠⎟
+
+
+
1 024 20 000 1 . ,
-
-
-
-
Counts
V V
V V
AIN AIN
REF REF
= Ч
⎛
⎝⎜ ⎞
⎠⎟
Ч
+
+
1 024 20 000 . ,
-
-
-
-
MAX1491/MAX1493/MAX1495
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
______________________________________________________________________________________ 19
Figure 15. MAX1493/MAX1495 Transfer Function ±2V Range
-2V 0
ANALOG INPUT VOLTAGE
+2V
LCD
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
-100 µV 100µV
Figure 16. MAX1493/MAX1495 Transfer Function ±200mV Range
-200mV 0
ANALOG INPUT VOLTAGE
+200mV
LCD
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
-10 µV 10 µV