MAX9030 Maxim, MAX9030 Datasheet - Page 6

• Manufacturer Part Number: MAX9030
• Description: The MAX9030/MAX9031/MAX9032/MAX9034 single/dual/quad comparators are optimized for single-supply applications from +2
• Manufacturer: Maxim

The MAX9030/MAX9031/MAX9032/MAX9034 are sin-
gle/dual/quad low-cost comparators. 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, and
consume only 35µA. Their common-mode input voltage
range extends from the negative supply to within 1.1V
of the positive supply. Internal hysteresis ensures clean
output switching, even with slow-moving input signals.
The MAX9030 comparator comes with a power-saving
shutdown mode. When in shutdown, the supply current
drops from a typical 35µA to 0.05µA, and the outputs
become high impedance. SHDN has a high input imped-
ance and typically draws 0.1µA when connected to V
or V
Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators
6
M A X9 0 3 0
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DD
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1
2
3
4
5
6
. A maximum logic low voltage of 0.3V
M A X9 0 3 1
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1
2
3
4
5
Detailed Description
PIN
M A X9 0 3 2
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4
8
1
2
3
5
6
7
Shutdown Mode
M A X9 0 3 4
11
10
12
13
14
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—
4
1
2
3
5
6
7
8
9

V
DD
SS
NAME
SHDN
OUTA
OUTB
OUTC
OUTD
INC+
IND+
INA+
INB+
OUT
INA-
INB-
INC-
IND-
V
IN+
V
IN-
DD
SS
applied to SHDN places the device in the shutdown
mode. A minimum logic high voltage of 0.7V
applied to SHDN will enable normal operation. To dis-
able shutdown, connect SHDN to V
Hysteresis extends the comparator’s noise margin by
increasing the upper threshold and decreasing the
lower threshold. A voltage-divider from the output of the
comparator 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:
Comparator Noninverting Input
N eg ati ve S up p l y V ol tag e. Byp ass w i th a 0.1µF cap aci tor .
Comparator Inverting Input
Comparator Output
Shutdown
P osi ti ve S up p l y V ol tag e. Byp ass w i th a 0.1µF cap aci tor .
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
Applications Information
FUNCTION
Pin Description
Adding Hysteresis
DD
.

V
DD