MAX1497 Maxim, MAX1497 Datasheet - Page 5

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

ELECTRICAL CHARACTERISTICS (continued)
(AV
C
Typical values are at T
DV
LED Drivers Bias Current
LED DRIVERS (Table 6)
LED Supply Voltage
LED Shutdown Supply Current
LED Supply Current
Display Scan Rate
Segment Current Slew Rate
DIG_ Voltage Low
Segment Drive Source Current
Matching
Segment Drive Source Current
Interdigit Blanking Time
REF+
DD
DD
= DV
= C
Current (Notes 8, 9)
3.5- and 4.5-Digit, Single-Chip ADCs with LED
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
∆I
I
∆I
I
V
SHDN
f
V
DVDD
I
SEG
I
OSC
LED
SEG
LED
DIG
SEG
/∆t
DV
DV
Standby mode
From AV
LED driver shutdown mode
Seven segments and decimal point on,
R
MAX1499
MAX1497
I
V
DIG_
ISET
LED
DD
DD
= 176mA
- V
= 25kΩ
= 5V
= 3.3V
SEG
DD
or V
= 0.6V, R
CONDITIONS
Drivers and µC Interface
DD
LED
= +2.7V to +5.25V, V
ISET
= 25kΩ
REF+
- V
MIN
2.70
18.0
REF-
= 2.048V (external reference)
0.178
TYP
21.5
120
176
512
640
±3
25
4
A
0.190
MAX
5.25
25.5
±10
320
180
20
10
= T
MIN
to T
UNITS
mA/µs
mA
mA
µA
µA
µA
Hz
µs
%
V
V
MAX
5
.