MAX9063 Maxim, MAX9063 Datasheet - Page 8

• Manufacturer Part Number: MAX9063
• Description: The MAX9060–MAX9064 are small single comparators, ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints
• Manufacturer: Maxim

Ultra-Small, Low-Power Single
Comparators in 4-Bump UCSP and 5 SOT23
Place a 0.1µF capacitor between REF or V
GND as close as possible to the device. During a
switching event, all comparators draw a current spike
from their power-supply rails. This current spike is
minimized by the use of an internal break-before-make
design.
The MAX9060–MAX9064 feature internal hysteresis for
noise immunity and glitch-free operation. If additional
hysteresis is needed, an external positive feedback net-
work can be easily implemented on the MAX9060,
MAX9062, and MAX9064 noninverting input devices.
Table 1. How Devices Behave Under Various Input Voltage Conditions
Figure 1. Adaptive Signal Level Detector
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MAX9060
MAX9061
MAX9062
MAX9063
MAX9064
PART
Applications Information
INPUT VOLTAGE CONDITIONS
Hysteresis Operation
DAC
V
V
V
V
V
V
V
V
V
V
Bypassing REF/V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
> V
< V
> V
< V
> 0.2V
< 0.2V
> 0.2V
< 0.2V
> 0.2V
< 0.2V
REF
IN
REF
REF
REF
REF
CC
MAX9060
and
CC
External pullup resistor pulls output high.
Output asserts low.
Output asserts low.
External pullup resistor pulls output high.
External pullup resistor pulls output high.
Output asserts low.
Output asserts low.
External pullup resistor pulls output high.
Output asserts high.
Output asserts low.
OUT
Additional external hysteresis is not recommended for
the MAX9061 due to possible crossover current-related
noise problems. Additional external hysteresis is not
possible on the MAX9063 because the noninverting
input of the comparator is not externally accessible.
The MAX9060 and MAX9061 can be used as an adap-
tive signal-level detector. Feed a DAC output voltage
to REF and connect the input to a variable signal level.
As the DAC output voltage is varied from 0.9V to 5.5V,
a corresponding signal level threshold-detector circuit
is implemented. See Figure 1.
I/O
V
MICROCONTROLLER
DD
INTERNAL
PULLUP
ACTION AT OUTPUT
Adaptive Signal Level Detector