參數(shù)資料
型號(hào): MCP4725A1T-E/CH
元件分類: DAC
英文描述: SERIAL INPUT LOADING, 6 us SETTLING TIME, 12-BIT DAC, PDSO6
封裝: PLASTIC, SOT-23, 6 PIN
文件頁(yè)數(shù): 33/50頁(yè)
文件大?。?/td> 1494K
代理商: MCP4725A1T-E/CH
2009 Microchip Technology Inc.
DS22039D-page 39
MCP4725
8.5.5
PROGRAMMABLE CURRENT
SOURCE
Example 8-3 illustrates an example how to convert the
DAC voltage output to a digitally selectable current
source by adding a voltage follower and a sensor
register.
FIGURE 8-3:
Digitally Controllable Current Source.
LOAD
VDD
IL
IB
RSENSE
R R
MCP4725
VDD
VOUT
A0
SCL
VSS
1
2
3
4
5
6
VDD
SDA
10 F
0.1 F
VDD
Dn
Input Code (0 to 4095)
=
I
L
V
OUT
R
SENSE
------------------
β
β 1
+
-------------
=
V
OUT
V
DD
Dn
4096
------------
×
=
I
B
I
L
β
----
=
VOUT
To MCU
(MASTER)
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