MCP4911-E/SN Microchip Technology, MCP4911-E/SN Datasheet - Page 31
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MCP4911-E/SN
Manufacturer Part Number
MCP4911-E/SN
Description
DAC 10BIT SGL W/SPI 8SOIC
Manufacturer
Microchip Technology
Datasheet
1.MCP4921T-EMS.pdf
(50 pages)
Specifications of MCP4911-E/SN
Number Of Converters
1
Settling Time
4.5µs
Package / Case
8-SOIC (3.9mm Width)
Number Of Bits
10
Data Interface
Serial, SPI™
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Number Of Dac Outputs
1
Resolution
10 bit
Interface Type
SPI
Supply Voltage (max)
6.5 V
Supply Voltage (min)
2.7 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 55 C
Supply Current
175 uA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP4911-E/SN
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
MCP4911-E/SN
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
6.6
In some applications, precision digital control of the
output range is desirable.
to use the DAC devices to achieve this in a bipolar or
single-supply application.
EXAMPLE 6-4:
2010 Microchip Technology Inc.
Thevenin
Equivalent
V
V
V
V
IN+
O
OUTB
OUTA
Selectable Gain and Offset Bipolar
Voltage Output Using DAC
Devices
=
=
Offset Adjust Gain Adjust
V
V
----------------------------------------------- -
IN+
=
=
OUTB
V
V
1
REFB
REFA
V
R
+
R
V
IN+
3
R
----- -
R
4
45
+
2
1
V
+
BIPOLAR VOLTAGE SOURCE WITH SELECTABLE GAIN AND OFFSET.
V
G
G
R
REFB
=
SPI
=
REFA
V
B
–
4
A
CC-
V
---------------------------------------------- -
Example 6-4
V
V
------------------------------------------- -
D
------ -
D
------ -
2
2
OUTB
OUTA
CC+
N
N
B
A
R
3
3
V
V
R
R
R
DAC
DAC
DD
DD
4
3
4
R
R
----- -
R
+
+
45
+
2
1
R
R
V
+
A
B
Bipolar “Window” DAC using R
5
45
CC-
DAC
V
illustrates how
45
DAC
R
R
5
A
3
V
V
(Gain Adjust)
B
OUTA
OUTB
(Offset Adjust)
D
R
A
V
45
, D
O
G
R
R
N = DAC Bit Resolution
1
3
X
=
=
B
= Gain selection (1x or 2x)
Offset Adjust Gain Adjust
= Digital value of DAC (0-255) for MCP4901/MCP4902
= Digital value of DAC (0-4095) for MCP4912/MCP4922
= Digital value of DAC (0-1023) for MCP4911/MCP4912
------------------
R
V
R
4
IN+
4
+
R
V
V
R
5
1
This circuit is typically used in Multiplier mode and is
ideal for linearizing a sensor whose slope and offset
varies. Refer to Section 6.9 “Using Multiplier Mode”
for more information on Multiplier mode.
The equation to design a bipolar “window” DAC would
be utilized if R
CC
CC
5
+
R
MCP4901/4911/4921
+
R
–
R
----- -
R
4
5
2
1
–
0.1uF
4
V
and R
OUTA
3
, R
5
R
----- -
R
4
2
1
and R
V
V
CC
R
CC
2
+
–
5
are populated.
DS22248A-page 31
V
O