MAX1492CAI+T Maxim Integrated Products, MAX1492CAI+T Datasheet - Page 15

• Manufacturer Part Number: MAX1492CAI+T
• Description: IC ADC W/LCD DRIVER 28-SSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1492CAI+T

• Display Type: LCD
• Configuration: 7 Segment + 2 Annunciators
• Interface: Serial
• Digits Or Characters: A/D 3.5 Digits
• Current - Supply: 960µA
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 21 shows the MAX1492/MAX1494 operating with
an external single-ended reference. In this mode, REF-
is connected to GND and REF+ is driven with an exter-
nal 2.048V reference. Bypass REF+ to GND with a
0.47µF capacitor.
Figure 9. LCD Voltage Waveform—Combinations 1–4 (BP_, SEG2/5/8)
______________________________________________________________________________________
g, d OFF
a, d OFF
a, g OFF
g ON
d ON
a ON
BP1
BP2
BP3
OFF
ALL
3.5- and 4.5-Digit, Single-Chip ADCs
φ1, φ2, φ3 - - BP HIGH WITH RESPECT TO SEGMENT (BP+ TIME)
φ1', φ2', φ3' - - BP LOW WITH RESPECT TO SEGMENT (BP- TIME)
BP1 ACTIVE DURING φ1 AND φ1'
BP2 ACTIVE DURING φ2 AND φ2'
BP3 ACTIVE DURING φ3 AND φ3'
φ1
φ2
FREQUENCY = 107Hz
φ3
φ1'
Figure 20 shows the MAX1492/MAX1494 operating with
an external differential reference. In this mode, REF-
is connected to the top of the strain gauge and REF+
is connected to the midpoint of the resistor-divider of
the supply.
φ2'
φ3'
V+ = V
V
V
V
L
LCD
LCD
= 1/3 V
= V
= V
DVDD
DVDD
DVDD
LCD
, V
with LCD Drivers
, V- = GND OR V
H
- V
- V
= 2/3 V
DISP
GND
(MAX1492)
(MAX1494)
DVDD
V+
V
V
V-
V+
V
V
V-
V+
V
V
V-
V+
V
V
V-
V+
V
V
V-
V+
V
V
V-
V+
V
V
V-
H
L
H
L
H
L
H
L
H
L
H
L
H
L
DISP
V
LCD
15