MCP4725DM-PTPLS Microchip Technology, MCP4725DM-PTPLS Datasheet - Page 36

• Manufacturer Part Number: MCP4725DM-PTPLS
• Description: BOARD DAUGHTER PICTAIL MCP4725
• Manufacturer: Microchip Technology

Specifications of MCP4725DM-PTPLS

• Number Of Dac's: 1
• Number Of Bits: 12
• Outputs And Type: 1, Single Ended
• Sampling Rate (per Second): 100k ~ 3.4M
• Data Interface: I²C
• Settling Time: 6µs
• Dac Type: Voltage
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP4725
• Silicon Manufacturer: Microchip
• Application Sub Type: DAC
• Kit Application Type: Data Converter
• Silicon Core Number: MCP4725
• Silicon Family Name: PICtail
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP4725
8.5.3
Some sensor applications require very high resolution
around the set point or threshold voltage.
Example 8-2
around the threshold using a voltage divider network
with a pull-up and pull-down resistor. In the circuit, the
output voltage range is scaled down, but its step
resolution is increased greatly.
EXAMPLE 8-2:
DS22039D-page 36
BUILDING A “WINDOW” DAC
shows an example of creating a “window”
1
2
3
V
V
V
MCP4725
0.1 µF
Thevenin
Equivalent
OUT
SS
DD
V
OUT
Single-Supply “Window” DAC.
SCL
SDA
A0
=
10 µF
V
6
5
4
DD
×
R
V
V
V
Dn
-------
2
12
23
23
trip
OUT
V
DD
=
=
=
R R
------------------ -
R
(
------------------------------------------------------
Where: Dn = DAC Input Code (0 – 4095)
V
R
V
-------------------------------------------- -
2
CC+
OUT
2
+
V
R
R
DD
R
3
R
1
R
3
R
R
R
R
2
2
2
23
3
2
)
+
+
+
V
V
+
R
CC+
CC-
R
(
23
V
V
3
23
CC-
R
1
R
To MCU
(MASTER)
3
R
)
sense
V
OUT
0.1 µF
V
TRIP
R
1
V
© 2009 Microchip Technology Inc.
23
R
Comparator
23
V
O
V
V
CC+
CC-