MAX986 Maxim, MAX986 Datasheet - Page 9

• Manufacturer Part Number: MAX986
• Description: The MAX985/MAX986/MAX989/MAX990/MAX993/MAX994 single/dual/quad micropower comparators feature low-voltage operation and rail-to-rail inputs and outputs
• Manufacturer: Maxim

Figure 3 shows a zero-crossing detector application.
The MAX985’s inverting input is connected to ground,
and its noninverting input is connected to a 100mV
signal source. As the signal at the noninverting input
crosses 0V, the comparator’s output changes state.
Figure 4 shows an application that converts 5V logic lev-
els to 3V logic levels. The MAX986 is powered by the 5V
supply voltage, and the pullup resistor for the MAX986’s
open-drain output is connected to the 3V supply voltage.
This configuration allows the full 5V logic swing without
creating overvoltage on the 3V logic inputs. For 3V to 5V
logic-level translation, simply connect the 3V supply to
V
Figure 3. Zero-Crossing Detector
CC
and the 5V supply to the pullup resistor.
100mV
4
3
_______________________________________________________________________________________
IN+
IN-
Micropower, Low-Voltage, UCSP/SC70,
Zero-Crossing Detector
Logic-Level Translator
V
V
V
CC
CC
EE
2
5
MAX985
OUT 1
Rail-to-Rail I/O Comparators
P-P
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, refer to the Application Note: UCSP—A
Wafer-Level Chip-Scale Package on Maxim’s web site
at www.maxim-ic.com/ucsp.
Figure 4. Logic-Level Translator
UCSP Applications Information
5V (3V) LOGIC IN
100kΩ
100kΩ
4
3
IN-
IN+
5V (3V)
V
V
CC
EE
5
2
MAX986
OUT
1
3V (5V)
R
PULLUP
3V (5V)
LOGIC OUT
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