MAX965-MAX970 Maxim, MAX965-MAX970 Datasheet - Page 7

• Manufacturer Part Number: MAX965-MAX970
• Description: Single/Dual/Quad / Micropower / Ultra-Low-Voltage / Rail-to-Rail I/O Comparators
• Manufacturer: Maxim

The MAX965–MAX970 single/dual/quad, micropower,
ultra-low-voltage comparators feature Rail-to-Rail
inputs and outputs and an internal 1.235V ±1.5%
bandgap reference. These devices operate from a sin-
gle +1.6V to +5.5V supply voltage range, and consume
less than 5µA supply current per comparator over the
extended temperature range. Internal hysteresis is pro-
grammable up to ±50mV using two external resistors
and the device’s internal reference. The rail-to-rail input
common-mode voltage range and the open-drain out-
puts allow easy voltage-level conversion for multivolt-
age systems. All inputs and outputs can tolerate a
continuous short-circuit fault condition to either rail.
The MAX965 is a single comparator with adjustable
hysteresis and a reference output pin. The MAX966 is a
dual comparator without the reference and without
adjustable hysteresis. The MAX967 is a dual compara-
MAX969/MAX970
________________________________________________Pin Descriptions (continued)
_______________Detailed Description
Ultra-Low-Voltage, Rail-to-Rail I/O Comparators
MAX969
10
11
12
13
14
15
16
—
1
2
3
4
5
6
7
8
9
PIN
SO
10
11
12
13
14
_______________________________________________________________________________________
—
—
—
1
2
3
4
5
6
7
8
9
MAX970
QSOP
8, 9
10
11
12
13
14
15
16
—
—
1
2
3
4
5
6
7
NAME
OUTB
OUTA
OUTD
OUTC
HYST
INA+
INB+
INC+
IND+
GND
VCC
INC-
IND-
INA-
INB-
N.C.
REF
Single/Dual/Quad, Micropower,
Comparator B Open-Drain Output
Comparator A Open-Drain Output
Positive Supply Voltage, +1.6V to +5.5V
Comparator A Inverting Input
Comparator A Noninverting Input
Comparator B Inverting Input
Comparator B Noninverting Input
No Connection. Not internally connected.
Internal Reference Output. Typically 1.235V with respect to GND.
Hysteresis Input. Connect to REF if not used. Input voltage range is
from (V
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Inverting Input
Comparator D Noninverting Input
Ground
Comparator D Open-Drain Output
Comparator C Open-Drain Output
®
REF
tor configured as a dual voltage monitor with common
hysteresis adjustment and a reference output. The dual
MAX968 is similar to the MAX967, but is configured as
a window comparator. The MAX969 is a quad com-
parator with a common hysteresis adjustment and a ref-
erence output pin. The MAX970 is a quad comparator
without a reference and without hysteresis adjustment.
(See Functional Diagrams and Selector Guide.)
The MAX965–MAX970 have a -0.25V to V
mon-mode range. Both comparator inputs may operate
at any differential voltage within the common-mode
voltage range, and the comparator displays the correct
output logic state.
The minimum operating voltage is 1.6V. As the supply
voltage falls below 1.6V, performance degrades
and supply current falls. The reference does not
- 50mV) to V
Low-Voltage Operation: V
REF
.
FUNCTION
Comparator Input
CC
Down to 1V
CC
input com-
7