MAX9120ESA-T Maxim Integrated Products, MAX9120ESA-T Datasheet - Page 9

• Manufacturer Part Number: MAX9120ESA-T
• Description: Comparator ICs SC70, 1.8V, 350nA Co mparator with Open-D
• Manufacturer: Maxim Integrated Products

Specifications of MAX9120ESA-T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX9117/MAX9118 feature an on-board 1.252V
±1.75% reference, yet draw an ultra-low supply current
of 600nA. The MAX9119/MAX9120 (without reference)
consume just 350nA of supply current. All four devices
are guaranteed to operate down to +1.6V. Their com-
mon-mode input voltage range extends 200mV
beyond-the-rails. Internal hysteresis ensures clean out-
put switching, even with slow-moving input signals.
Large internal output drivers allow rail-to-rail output
swing with up to ±5mA loads.
The output stage employs a unique design that mini-
mizes supply-current surges while switching, virtually
SC70
—
—
M A X9117/
M A X9118
1
2
3
4
5
1, 5,
SO
—
6
4
3
2
7
8
PIN
SC 70
M A X91 19/
—
—
SC70, 1.6V, Nanopower, Beyond-the-Rails
M A X91 20
1
2
3
5
4
IN+
REF
_______________________________________________________________________________________
1, 5,
SO
6
4
3
7
2
Detailed Description
8
Comparators With/Without Reference
1.252V
V
NAME
REF
CC
OUT
V CC
N.C.
V EE
REF
IN+
IN-
V
EE
Pin Description
MAX9117
MAX9118
Comparator Output
Negative Supply
Comparator
Noninverting Input
1.252V Reference
Positive Supply
Comparator Inverting
Input
No Connection.
Not internally
connected.
FUNCTION
OUT
eliminating the supply glitches typical of many other
comparators. The MAX9117/MAX9119 have a push-pull
output stage that sinks as well as sources current. The
MAX9118/MAX9120 have an open-drain output stage
that can be pulled beyond V
mum of 6V above V
ideal for implementing wire-OR output logic functions.
The input common-mode voltage range extends from
V
at any differential input voltage within these limits. Input
bias current is typically ±0.15nA if the input voltage is
between the supply rails. Comparator inputs are pro-
tected from overvoltage by internal ESD protection
diodes connected to the supply rails. As the input volt-
age exceeds the supply rails, these ESD protection
diodes become forward biased and begin to conduct.
The MAX9117–MAX9120 contain a unique break-
before-make output stage capable of rail-to-rail opera-
tion with up to ±5mA loads. Many comparators
consume orders of magnitude more current during
switching than during steady-state operation. However,
with this family of comparators, the supply-current
change during an output transition is extremely small.
In the Typical Operating Characteristics, the Supply
Current vs. Output Transition Frequency graphs show
the minimal supply-current increase as the output
switching frequency approaches 1kHz. This character-
istic reduces the need for power-supply filter capaci-
tors to reduce glitches created by comparator
switching currents. In battery-powered applications,
this characteristic results in a substantial increase in
battery life.
EE
- 0.2V to V
IN+
IN-
CC
+ 0.2V. These comparators operate
EE
Functional Diagrams
. These open-drain versions are
V
V
CC
EE
Output Stage Circuitry
Input Stage Circuitry
MAX9119
MAX9120
CC
to an absolute maxi-
OUT
9