參數(shù)資料
型號: MCP4725A0T-E/CH
廠商: Microchip Technology
文件頁數(shù): 31/50頁
文件大?。?/td> 0K
描述: IC DAC 12BIT W/I2C SOT23A-6
標準包裝: 1
設置時間: 6µs
位數(shù): 12
數(shù)據(jù)接口: EEPROM,I²C,串行
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 單電源
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SOT-23-6
供應商設備封裝: SOT-23-6
包裝: 標準包裝
輸出數(shù)目和類型: 1 電壓,單極;1 電壓,雙極
采樣率(每秒): *
產(chǎn)品目錄頁面: 673 (CN2011-ZH PDF)
配用: MCP4725DM-PTPLS-ND - BOARD DAUGHTER PICTAIL MCP4725
其它名稱: MCP4725A0T-E/CHDKR
MCP4725AOT-E/CHDKR
MCP4725AOT-E/CHDKR-ND
2009 Microchip Technology Inc.
DS22039D-page 37
MCP4725
8.5.4
BIPOLAR OPERATION
Bipolar operation is achievable using the MCP4725 by
using an external operational amplifier (op amp). This
allows a general purpose DAC, with its cost and
availability advantages, to meet almost any desired
output voltage range, power and noise performance.
Example 8-3 illustrates a simple bipolar voltage source
configuration. R1 and R2 allow the gain to be selected,
while R3 and R4 shift the DAC's output to a selected
offset. Note that R4 can be tied to VDD (= VREF) instead
of VSS, if a higher offset is desired. Note that a pull-up
to VDD could be used, instead of R4, if a higher offset is
desired.
EXAMPLE 8-3:
Digitally-Controlled Bipolar Voltage Source.
VDD
VOUT
R3
R4
R2
R1
VIN+
0.1 F
VCC+
VCC
V
IN+
V
OUTR4
R
3
R
4
+
--------------------
=
VO
V
O
V
IN+ 1
R
2
R
1
------
+
V
DD
R
2
R
1
------
=
To MCU
(MASTER)
R R
MCP4725
VDD
VOUT A0
SCL
VSS
1
2
3
4
5
6
VDD SDA
10 F
0.1 F
VDD
Where: Dn = DAC Input Code (0 – 4095)
V
OUT
V
DD
Dn
2
12
-------
×
=
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