MAX1491CNI+ Maxim Integrated Products, MAX1491CNI+ Datasheet - Page 19

• Manufacturer Part Number: MAX1491CNI+
• Description: IC ADC W/LCD DRIVER 28-DIP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1491CNI+

• Display Type: LCD
• Configuration: 7 Segment + 2 Annunciators
• Digits Or Characters: A/D 3.5 Digits
• Current - Supply: 980µA
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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