MCP4725A2T-E/CH Microchip Technology, MCP4725A2T-E/CH Datasheet - Page 30

• Manufacturer Part Number: MCP4725A2T-E/CH
• Description: DAC 1-CH Resistor-String 12-Bit 6-Pin SOT-23 T/R
• Manufacturer: Microchip Technology

Specifications of MCP4725A2T-E/CH

• Package: 6SOT-23
• Resolution: 12 Bit
• Architecture: Resistor-String
• Digital Interface Type: Serial (2-Wire, I2C)
• Number Of Outputs Per Chip: 1
• Output Type: Voltage
• Full Scale Error: ±2 %FSR
• Integral Nonlinearity Error: ±14.5 LSB
• Maximum Settling Time: 6(Typ) us
• Settling Time: 6µs
• Number Of Bits: 12
• Data Interface: I²C, Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP4725DM-PTPLS - BOARD DAUGHTER PICTAIL MCP4725
• Power Dissipation (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCP4725A2T-E/CH; MCP4725A2T-E/CHTR

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 reso-
lution is increased greatly.
EXAMPLE 8-2:
DS22039C-page 30
BUILDING A “WINDOW” DAC
shows an example of creating a “window”
1
2
3
V
V
V
0.1 µF
Thevenin
Equivalent
MCP4725
OUT
SS
DD
V
OUT
Single-Supply “Window” DAC.
SCL
SDA
A0
=
10 µF
V
6
5
4
DD
-------
2
D
12
R
V
V
V
23
23
trip
OUT
V
DD
=
=
=
------------------
R
(
---------------------------------------------------- -
R R
V
R
V
------------------------------------------- -
2
CC+
2
OUT
+
V
R
R
DD
R
3
R
R
1
3
R
R
2
R
R
2
2
23
where D = DAC Input Code (0 – 4095)
)
+
3
2
+
+
V
+
R
V
R
(
CC+
23
CC-
V
V
3
23
CC-
R
R
1
To MCU
(MASTER)
3
R
)
sense
V
OUT
0.1 µF
V
TRIP
R
1
V
© 2007 Microchip Technology Inc.
23
R
Comparator
23
V
O
V
V
CC+
CC-