Owner's manual

MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
6 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(V+ = 5V, V- = GND, T
A
= +25°C, unless otherwise noted.)
1000
1
1.0 2.0 2.2 2.4
RESPONSE TIME 
AT LOW SUPPLY VOLTAGES (V
OHL
)
10
100
MAX971/4-TOC13
SINGLE-SUPPLY VOLTAGE (V)
RESPONSE TIME (µs)
1.2 1.4 1.6 1.8
-20mV
-100mV

R
PULL-UP
= 10kΩ
100
0.1
1.0 2.0 2.5
MAX924 RESPONSE TIME 
AT LOW SUPPLY VOLTAGES
1
10
MAX971/4-TOC14
SINGLE-SUPPLY VOLTAGE (V)
CURRENT (mA)
1.5
SINK CURRENT AT V
OUT
= 0.4V
20
15
0
010
SHORT-CIRCUIT SINK CURRENT 
vs. SUPPLY VOLTAGE
MAX971/4-TOC15
TOTAL SUPPLY VOLTAGE (V)
SINK CURRENT (mA)
5


10
5
25
OUT CONNECTED TO V+
GND CONNECTED TO V-
____________________________________________________________Pin Descriptions
Inverting Input of Comparator AINA-—
Inverting Comparator Input IN-4
Noninverting Input of Comparator AINA+—
Noninverting Comparator Input IN+3
Negative Supply. Connect to ground for single-supply operation
(MAX9_1).
V-2
Comparator A Open-Drain Output. Sinks current to V-.OUTA—
Ground. Connect to V- for single-supply operation. Output
transistor pulls to GND.
GND1
FUNCTIONNAME
MAX971
MAX981
4
—
3
—
2
1
—
MAX972
—
—
3
—
2
1
—
MAX982
—
—
3
—
2
1
—
MAX973
MAX983
PIN
Reference Output. 1.182V with respect to V-.REF6
5
6
Hysteresis Input. Connect to REF if not used. Input voltage range is
from V
REF
to V
REF
- 50mV.
HYST
4
—
5
Noninverting Input of Comparator BINB+—
Inverting Input of Comparator BINB-—
6
5
—
4
—
—
6
5
Comparator B Open-Drain Output. Sinks current to V-.OUTB8
—
—
Comparator Output. Sinks current to GND.OUT
7
8
Positive SupplyV+7
8
—
7
8
—
7