Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

Preview PDF HTML

MCP4801-E/MS Datasheet(PDF) 29 Page - Microchip Technology

Part # MCP4801-E/MS
Description  8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface
PDF  48 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP4801-E/MS Datasheet(HTML) 29 Page - Microchip Technology

Back Button MCP4801-E/MS Datasheet HTML 25Page - Microchip Technology MCP4801-E/MS Datasheet HTML 26Page - Microchip Technology MCP4801-E/MS Datasheet HTML 27Page - Microchip Technology MCP4801-E/MS Datasheet HTML 28Page - Microchip Technology MCP4801-E/MS Datasheet HTML 29Page - Microchip Technology MCP4801-E/MS Datasheet HTML 30Page - Microchip Technology MCP4801-E/MS Datasheet HTML 31Page - Microchip Technology MCP4801-E/MS Datasheet HTML 32Page - Microchip Technology MCP4801-E/MS Datasheet HTML 33Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 29 / 48 page
background image
 2010 Microchip Technology Inc.
DS22244B-page 29
MCP4801/4811/4821
6.7
Selectable Gain and Offset Bipolar
Voltage Output
In some applications, precision digital control of the
output range is desirable. Example 6-4 illustrates how
to use the MCP4801/4811/4821 family of devices to
achieve this in a bipolar or single-supply application.
This circuit is typically used for linearizing a sensor
whose slope and offset varies.
The equation to design a bipolar “window” DAC would
be utilized if R3, R4 and R5 are populated.
EXAMPLE 6-4:
BIPOLAR VOLTAGE SOURCE WITH SELECTABLE GAIN AND OFFSET
VDD
R3
R4
R2
VO
DACA
VDD
R1
(DACA for Gain Adjust)
(DACB for Offset Adjust)
SPI
3
R5
VCC+
Thevenin
Bipolar “Window” DAC using R4 and R5
0.1 µF
VCC–
VCC+
VCC–
VOUTA
VOUTB
V
IN+
V
OUTBR4
V
CC-R3
+
R
3
R
4
+
-------------------------------------------------
=
V
O
V
IN+ 1
R
2
R
1
------
+


V
OUTA
R
2
R
1
------


–
=
Equivalent
V
45
V
CC+R4
V
CC-R5
+
R
4
R
5
+
---------------------------------------------
=R
45
R
4R5
R
4
R
5
+
-------------------
=
V
IN+
V
OUTBR45
V
45R3
+
R
3
R
45
+
------------------------------------------------
=V
O
V
IN+ 1
R
2
R
1
------
+


V
OUTA
R
2
R
1
------


–
=
Offset Adjust Gain Adjust
Offset Adjust Gain Adjust
DACB
V
OUTA
2.048 G
A
D
n
2
N
------

=
V
OUTB
2.048 G
B
D
n
2
N
------

=
VIN+
G
=
Gain selection (1x or 2x)
N
=
DAC bit resolution
Dn = Digital value of DAC (0-255) for MCP4801
=
Digital value of DAC (0-1023) for MCP4811
=
Digital value of DAC (0-4095) for MCP4821



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com