MCP4902T-E/P MICROCHIP [Microchip Technology], MCP4902T-E/P Datasheet - Page 29
MCP4902T-E/P
Manufacturer Part Number
MCP4902T-E/P
Description
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter with SPI Interface
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.MCP4902T-EP.pdf
(48 pages)
- Current page: 29 of 48
- Download datasheet (4Mb)
6.4.1.2
When calibrating a set point or threshold of a sensor,
typically only a small portion of the DAC output range is
utilized. If the LSb size is adequate enough to meet the
application’s accuracy needs, the unused range is
sacrificed without consequences. If greater accuracy is
needed, then the output range will need to be reduced
to increase the resolution around the desired threshold.
EXAMPLE 6-2:
2010 Microchip Technology Inc.
(a) Single Output DAC:
(b) Dual Output DAC:
D
V OUT
G = Gain selection (1x or 2x)
N = DAC Bit Resolution
Thevenin
Equivalent
n
= Digital value of DAC (0-4095) for MCP4921/MCP4922
= Digital value of DAC (0-255) for MCP4901/MCP4902
= Digital value of DAC (0-1023) for MCP4911/MCP4912
=
Building a “Window” DAC
V
REF
SPI
V
REF
G
MCP4902
MCP4912
MCP4922
MCP4921
MCP4901
MCP4911
SINGLE-SUPPLY “WINDOW” DAC
R
V
V
3
23
23
trip
D
------
2
N
n
=
=
V
=
------------------
R
---------------------------------------------------- -
DD
DAC
V
R
V
------------------------------------------- -
2
CC+
2
OUT
+
R
R
3
R
R
3
R
R
2
2
2
23
+
+
+
+
R
V
R
23
V
OUT
V
3
23
CC-
R
R
1
3
R
1
R
R
3
2
V
V
CC+
CC-
V
OUT
If the threshold is not near V
a “window” around the threshold has several
advantages. One simple method to create this
“window” is to use a voltage divider network with a
pull-up and pull-down resistor.
Example 6-4
R
sense
MCP4902/4912/4922
R
1
V
23
illustrate this concept.
R
0.1 µF
V
23
V
trip
O
REF
Comparator
or V
V
V
CC+
CC-
Example 6-2
DS22250A-page 29
SS
, then creating
and
Related parts for MCP4902T-E/P
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Dual 8-bit DAC With SPI Interace 14 SOIC .150in T/R
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
Dual 8-bit DAC With SPI Interace 14 TSSOP 4.4mm T/R
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
DAC 8BIT DUAL W/SPI 14SOIC
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
DAC 8BIT DUAL W/SPI 14TSSOP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
DAC 8BIT DUAL W/SPI 14PDIP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8/10/12-bit Dual Voltage Output Digital-to-analog Converter With Spi Interface
Manufacturer:
Microchip Technology Inc.
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
Low-Cost NV Digital POT with WiperLock™ Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
8-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet: