MAX9024ASD Maxim Integrated Products, MAX9024ASD Datasheet - Page 5

• Manufacturer Part Number: MAX9024ASD
• Description: Comparator ICs Micropower, Ultra-Sm all, Quad, Single-Su
• Manufacturer: Maxim Integrated Products

Specifications of MAX9024ASD

• Dc: 0036

The MAX9021/MAX9022/MAX9024 are single/dual/
quad, low-cost, low-power comparators that consume
only 2.8µA and provide a propagation delay, t
cally 3µs. They have an operating-supply voltage from
2.5V to 5.5V when operating from a single supply and
from ±1.25V to ±2.75V when operating from dual power
supplies. Their common-mode input voltage range
extends from the negative supply to within 1.1V of the
positive supply. Internal hysteresis ensures clean out-
put switching, even with slow-moving input signals.
Hysteresis extends the comparator’s noise margin by
increasing the upper threshold and decreasing the
lower threshold. A voltage-divider from the compara-
M A X9 0 2 1
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Micropower, Ultra-Small, Single/Dual/Quad,
M A X9 0 2 2
Applications Information
PIN
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4
8
1
2
3
5
6
7
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Detailed Description
M A X9 0 2 4
11
10
12
13
14
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4
1
2
3
5
6
7
8
9
Adding Hysteresis
NAME
OUTA
OUTB
OUTC
OUTD
INA+
INB+
INC+
IND+
OUT
INA-
INB-
INC-
IND-
V
IN+
V
IN-
DD
SS
PD
, typi-
Single-Supply Comparators
Comparator Noninverting Input
Negative Supply Voltage
Comparator Inverting Input
Comparator Output
Positive Supply Voltage. Bypass with a 0.1µF capacitor to GND.
Comparator A Output
Comparator A Inverting Input
Comparator A Noninverting Input
Comparator B Noninverting Input
Comparator B Inverting Input
Comparator B Output
Comparator C Output
Comparator C Inverting Input
Comparator C Noninverting Input
Comparator D Noninverting Input
Comparator D Inverting Input
Comparator D Output
tor’s output sets the trip voltage. Therefore, the trip volt-
age is related to the output voltage.
These comparators have 4mV internal hysteresis.
Additional hysteresis can be generated with two resis-
tors, using positive feedback (Figure 1). Use the follow-
ing procedure to calculate resistor values:
1) Find the trip points of the comparator using these for-
mulas:
where V
parator switches its output from high to low as V
rises above the trip point. V
age at which the comparator switches its output from
low to high as V
V
TH
TH
= V
V
TL
is the threshold voltage at which the com-
REF
= V
IN
+ ((V
FUNCTION
REF
drops below the trip point.
DD
(1 - (R2 / (R1 + R2))
- V
REF
Pin Description
TL
)R2) / (R1 + R2)
is the threshold volt-
IN
5