MAX1492 Maxim, MAX1492 Datasheet - Page 2

• Manufacturer Part Number: MAX1492
• Description: 3.5- and 4.5-Digit / Single-Chip ADCs with LCD Drivers
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
AV
DV
AIN+, AIN- to GND................................V
REF+, REF- to GND...............................V
LOWBATT to GND ...................................-0.3V to (AV
CLK,
SEG_ and BP_ to GND ............................-0.3V to (DV
V
V
Maximum Current into Any Pin ...........................................50mA
3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
ELECTRICAL CHARACTERISTICS
(AV
All specifications are at T
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
DC ACCURACY
Noise-Free Resolution
Integral Nonlinearity (Note 1)
Range Change Accuracy
Rollover Error (See the Definitions
Section)
Output Noise
Offset Error (Zero Input Reading)
Gain Error
Offset Drift (Zero-Reading Drift)
Gain Drift
INPUT CONVERSION RATE
External Clock Frequency
External-Clock Duty Cycle
Conversion Rate
ANALOG INPUTS (AIN+, AIN-, bypass to GND with 0.1µF or greater capacitors)
AIN Input-Voltage Range
(Note 5)
AIN Absolute Input Voltage to
GND
NEG
DISP
GND .....................................................-0.3V to (DV
DD
DD
DD
_______________________________________________________________________________________
EOC, CS, DIN, SCLK, DOUT to
to GND ...........................................-2.6V to (AV
to GND............................................................-0.3V to +6V
to GND ...........................................-0.3V to (DV
to GND ...........................................................-0.3V to +6V
= DV
PARAMETER
DD
= +2.7V to +5.25V, GND = 0, V
A
= T
MIN
to T
MAX
SYMBOL
Offset
NEG
NEG
INL
, unless otherwise noted. Typical values are at T
to +(AV
to +(AV
REF+
MAX1494
MAX1492
2.000V range
200mV range
(V
(V
V
V
V
(Note 3)
V
Internal clock
External clock, f
RANGE bit = 0, ±2V
RANGE bit = 1, ±200mV
AIN+
AIN-
IN
IN
- V
AIN+
AIN+
DD
DD
DD
DD
DD
DD
DD
= 0 (Note 2)
= 0 (Note 4)
REF-
- V
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
- V
- V
- V
AIN+
AIN-
= 2.048V (external reference). Internal clock mode, unless otherwise noted.
AIN-
AIN-
= full scale,
= full scale
= 0.100V) on 200mV range /
= 0.100V) on 2.0V range
CONDITIONS
CLK
Continuous Power Dissipation (T
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= 4.915MHz
28-Pin SSOP (derate 9.5mW/°C above +70°C) ...........762mW
28-Pin PDIP (derate 14.3mW/°C above +70°C)......1142.9mW
32-Pin TQFP (derate 20.7mW/°C above +70°C).....1652.9mW
A
= +25°C, unless otherwise noted.)
-19,999
-1999
MIN
-0.5
-2.0
-0.2
-2.2
40
-0
A
= +70°C)
4.915
TYP
10:1
0.1
±1
±1
±1
±1
10
5
5
+19,999
+1999
MAX
+0.5
+2.0
+0.2
+2.2
60
0
Reading
ppm/°C
UNITS
Count
Count
Count
%FSR
µV
µV/°C
Ratio
MHz
Hz
%
V
V
P-P