MAX1497 Maxim, MAX1497 Datasheet - Page 2

• Manufacturer Part Number: MAX1497
• Description: 3.5- and 4.5-Digit / Single-Chip ADCs with LED Drivers and C Interface
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
AV
DV
AIN+, AIN- to GND (MAX1499) ...........VNEG to (AV
REF+, REF- to GND (MAX1499) ......... VNEG to (AV
LOWBATT to GND (MAX1499) ................-0.3V to (AV
CLK, EOC, CS, DIN, SCLK,
DOUT to GND (MAX1499) .......................-0.3V to (DV
VNEG to GND (MAX1499) .......................-2.6V to (AV
LED_EN to GND (MAX1499)....................-0.3V to (DV
ISET to GND (MAX1499)..........................-0.3V to (AV
V
AIN+, AIN- to GND (MAX1497)..............VNEG to (V
REF+, REF- to GND (MAX1497) ........... VNEG to (V
CLK, EOC, CS, DIN, SCLK,
DOUT to GND (MAX1497)..........................-0.3V to (V
VNEG to GND (MAX1497)..........................-2.6V to (V
ISET to GND (MAX1497) ............................-0.3V to (V
3.5- and 4.5-Digit, Single-Chip ADCs with LED
Drivers and µC Interface
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.
ELECTRICAL CHARACTERISTICS
(AV
C
Typical values are at T
2
DC ACCURACY
Noise-Free Resolution
Integral Nonlinearity (Note 1)
Range Change Ratio
Rollover Error
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
DD
REF+
DD
DD
DD
_______________________________________________________________________________________
to GND (MAX1497) ...........................................-0.3V to +6V
to GND (MAX1499).........................................-0.3V to +6V
to GND (MAX1499) ........................................-0.3V to +6V
= DV
= C
PARAMETER
REF-
DD
= V
= 0.1µF, C
DD
= +2.7V to +5.25V, GND = 0, GLED = 0, V
A
= +25°C, unless otherwise noted.)
VNEG
= 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at T
SYMBOL
Offset
INL
MAX1499
MAX1497
2.000V range
200mV range
(V
(V
V
V
V
(Note 3)
V
Internal clock
External clock, f
DD
DD
DD
DD
AIN+
AIN-
IN
IN
AIN+
AIN+
DD
DD
DD
DD
DD
DD
DD
DD
= 0 (Note 2)
= 0 (Note 4)
to +0.3V)
to +0.3V)
to +0.3V)
to +0.3V)
- V
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
- V
- V
- V
AIN+
AIN-
AIN-
AIN-
= full scale
= full scale
= 0.100V) on 200mV range
= 0.100V) on 2.0V range
CONDITIONS
LED
CLK
VLED to GLED ..........................................................-0.3V to +6V
GLED to GND ........................................................-0.3V to +0.3V
SEG_ to GLED..........................................-0.3V to (VLED + 0.3V)
DIG_ to GLED ..........................................-0.3V to (VLED + 0.3V)
DIG_ Sink Current .............................................................300mA
DIG_ Source Current...........................................................50mA
SEG_ Sink Current ..............................................................50mA
SEG_ Source Current..........................................................50mA
Maximum Current Input into Any Other Pin ........................50mA
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= +2.7V to +5.25V, V
= 4.9152MHz
32-Pin TQFP (derate 20.7mW/°C above +70°C).....1652.9mW
28-Pin SSOP (derate 9.5mW/°C above +70°C) ...........762mW
28-Pin PDIP (derate 14.3mW/°C above +70°C)......1142.9mW
REF+
-19,999
- V
-1999
MIN
-0.5
40
-0
REF-
A
= +70°C)
= 2.048V (external reference)
4.9152
TYP
10:1
0.1
±1
±1
±1
±1
10
5
5
+19,999
A
+1999
MAX
+0.5
60
= T
0
MIN
Reading
ppm/°C
to T
UNITS
Count
Count
Count
%FSR
µV/°C
µV
Ratio
MHz
Hz
%
P-P
MAX
.