- 您現在的位置：買賣IC網 > PDF目錄9324 > MCP41050T-I/SN (Microchip Technology)IC POT DIGITAL 50K 1CH SPI 8SOIC PDF資料下載
參數資料
| 型號： | MCP41050T-I/SN |
| 廠商： | Microchip Technology |
| 文件頁數： | 8/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DIGITAL 50K 1CH SPI 8SOIC |
| 標準包裝： | 3,300 |
| 接片： | 256 |
| 電阻（歐姆）： | 50k |
| 電路數： | 1 |
| 溫度系數： | 標準值 800 ppm/°C |
| 存儲器類型： | 易失 |
| 接口： | 3 線串行（芯片選擇） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOICN |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
MCP41XXX/42XXX
DS11195C-page 16
2003 Microchip Technology Inc.
FIGURE 4-7:
Single Supply
programmable differential amplifier using digital
potentiometers.
4.2.3
PROGRAMMABLE OFFSET TRIM
For applications requiring only a programmable voltage
reference, the circuit in Figure 4-8 can be used. This
circuit shows the device used in the potentiometer
mode along with two resistors and a buffered output.
This creates a circuit with a linear relationship between
voltage-out and programmed code. Resistors R1 and
R2 can be used to increase or decrease the output volt-
age step size. The potentiometer in this mode is stable
over temperature. The operation of this circuit over
temperature is shown in Figure 2-3. The worst perfor-
mance over temperature will occur at the lower codes
due to the dominating wiper resistance. R1 and R2 can
also be used to affect the boundary voltages, thereby
eliminating the use of these lower codes.
FIGURE 4-8:
By changing the values of
R1 and R2, the voltage output resolution of this
programmable voltage reference circuit is
affected.
4.3
Calculating Resistances
When programming the digital potentiometer settings,
the following equations can be used to calculate the
resistances. Programming code 00h effectively brings
the wiper to the B terminal, leaving only the wiper resis-
tance. Programming higher codes will bring the wiper
closer to the A terminal of the potentiometer. The equa-
tions in Figure 4-9 can be used to calculate the terminal
resistances. Figure 4-10 shows an example calculation
using a 10 k
potentiometer.
FIGURE 4-9:
Potentiometer resistances
are a function of code. It should be noted that,
when using these equations for most feedback
amplifier circuits (see Figure 4-4 and Figure 4-5),
the wiper resistance can be omitted due to the
high impedance input of the amplifier.
FIGURE 4-10:
Example Resistance
calculations.
MCP601
VB
VSS
VDD
-IN
+IN
VOUT
AB
A
B
(SIG -)
MCP42010
1/2
VREF
NOTE: Potentiometer values must be equal
+
-
Where:
RA
RAB 256 Dn
–
()
256
---------------------------------------
=
RB
RABDn
256
------------------
=
RAB
Total Resistance of pot
=
Dn
Wiper setting forDn 0 to 255
=
VOUT
VA VB
–
()
RB
RA
-------
=
VA
(SIG +)
MCP606
OUT
VSS
VDD
-IN
+IN
VDD
VSS
R1
R2
B
A
MCP41
010
0.1 uF
+
-
PA
PB
PW
Where:
PA is the A terminal
PB is the B terminal
PW is the wiper terminal
RWA is resistance between Terminal A and wiper
RWB is resistance between Terminal B and Wiper
RAB is overall resistance for pot (10 k, 50 k or 100 k)
RW is wiper resistance
Dn is 8-bit value in data register for pot number n
RWA Dn
()
RAB
() 256 Dn
–
()
256
-------------------------------------------- RW
+
=
RWB Dn
()
RAB
() Dn
()
256
---------------------------- RW
+
=
Example:
Code = C0h = 192d
R = 10 k
Note: All values shown are typical and
actual results will vary.
PA
PB
PW
10 k
RWA Dn
()
RAB
() 256 Dn
–
()
256
-------------------------------------------- RW
+
=
RWB C0h
()
10k
() 192
()
256
----------------------------------- 52
+
=
RWA C0h
()
10k
() 256 192
–
()
256
--------------------------------------------------- 52
+
=
RWA C0h
()
2552
=
RWB Dn
()
RAB
() Dn
()
256
---------------------------- RW
+
=
RWB C0h
()
7552
=
相關PDF資料 |
PDF描述 |
|---|---|
| DS1743P-70 | IC RTC RAM Y2K 5V 70NS 34-PCM |
| VE-BNT-IU-F4 | CONVERTER MOD DC/DC 6.5V 200W |
| VE-BNT-IU-F3 | CONVERTER MOD DC/DC 6.5V 200W |
| DS1286I | IC TIMEKEEPER WATCHDOG 28-EDIP |
| DS1244YP-70 | IC NVSRAM 256KBIT 70NS 34PCM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MCP41100 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Single/Dual Digital Potentiometer with SPI⑩ Interface |
| MCP41100E/P | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Single/Dual Digital Potentiometer with SPI Interface |
| MCP41100-E/P | 功能描述:數字電位計 IC 256 Step SPI 100kOhm RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP41100E/SL | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Single/Dual Digital Potentiometer with SPI Interface |
| MCP41100E/SN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Single/Dual Digital Potentiometer with SPI Interface |
發(fā)布緊急采購，3分鐘左右您將得到回復。