MAX974CSE データシートの表示（PDF） - Maxim Integrated
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MAX974CSE Datasheet PDF : 17 Pages
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Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
Detailed Description
The MAX971–MAX974/MAX981–MAX984 comprise
various combinations of a micropower 1.182V reference
and micropower comparators. The Typical Operating
Circuit shows the MAX971/MAX981 configuration, and
Figures 1a–1d show the MAX9_2–MAX9_4 configurations.
Internal hysteresis in the MAX9_1, MAX982, and
MAX9_3 provides the easiest method for implementing
hysteresis. It also produces faster hysteresis action and
consumes much less current than circuits using external
positive feedback.
Power-Supply and Input Signal Ranges
This family of devices operates from a single 2.5V to 11V
power supply. The MAX9_1 and MAX9_4 have a
separate ground for the output driver, allowing operation
with dual supplies ranging from ±1.25V to ±5.5V.
Connect V- to GND when operating the MAX9_1 or
MAX9_4 from a single supply. The maximum total supply
voltage in this case is still 11V.
For proper comparator operation, the input signal can
range from the negative supply (V-) to within one volt of
the positive supply (V+ - 1V). The guaranteed common-
mode input voltage range extends from V- to (V+ -
1.3V). The inputs can be taken above and below the
supply rails by up to 300mV without damage.
1 (A1) OUTA
2 (C2) V-
3 (C1) INA+
4 (B1) INA-
MAX972
OUTB 8 (A3)
V+ 7 (A2)
INB+ 6 (C3)
INB- 5 (B3)
( ) BUMPS FOR THE UCSP
Figure 1a. MAX972 Functional Diagram
1 OUTA
2 V-
3 INA+
4 INB+
MAX982
V-
OUTB 8
V+ 7
REF 6
HYST 5
1 OUTA
2 V-
3 INA+
4 INB-
MAX9_3
V-
OUTB 8
V+ 7
REF 6
HYST 5
Figure 1c. MAX973/MAX983 Functional Diagram
(Window Comparator)
1 OUTB
2 OUTA
3 V+
4 INA-
5 INA+
MAX9_4
OUTC 16
OUTD 15
GND 14
IND+ 13
IND- 12
6 INB-
7 INB+
8 REF
INC+ 11
INC- 10
V- 9
Figure 1b. MAX982 Functional Diagram
Figure 1d. MAX974/MAX984 Functional Diagram
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