參數(shù)資料
型號: MCP795W10T-I/ST
廠商: Microchip Technology
文件頁數(shù): 6/13頁
文件大小: 0K
描述: IC RTCC 1KB EE WD/EVENT 14TSSOP
標準包裝: 2,500
類型: 時鐘/日歷
特點: 警報,EEPROM,閏年,方波輸出,SRAM,看門狗定時器
存儲容量: 64B
時間格式: HH:MM:SS:hh(12/24 小時)
數(shù)據(jù)格式: YY-MM-DD-dd
接口: SPI
電源電壓: 1.8 V ~ 5.5 V
電壓 - 電源,電池: 1.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 14-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 14-TSSOP
包裝: 帶卷 (TR)
2010 Microchip Technology Inc.
DS22250A-page 29
MCP4902/4912/4922
6.4.1.2
Building a “Window” DAC
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.
If the threshold is not near VREF or VSS, then creating
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 6-2 and
Example 6-4 illustrate this concept.
EXAMPLE 6-2:
SINGLE-SUPPLY “WINDOW” DAC
VREF
VDD
SPI
3
Vtrip
R1
R2
0.1 F
Comparator
R3
VCC-
VCC+
VCC-
VOUT
R23
R2R3
R2 R3
+
------------------
=
V23
VCC+R2
VCC-R3
+
R2 R3
+
-----------------------------------------------------
=
Vtrip
VOUTR23 V23R1
+
R2 R23
+
--------------------------------------------
=
R1
R23
V23
VOUT
VO
Thevenin
Equivalent
Rsense
G = Gain selection (1x or 2x)
Dn = Digital value of DAC (0-255) for MCP4901/MCP4902
VOUT
VREF G
Dn
2
N
------
=
= Digital value of DAC (0-1023) for MCP4911/MCP4912
= Digital value of DAC (0-4095) for MCP4921/MCP4922
N = DAC Bit Resolution
DAC
MCP4901
MCP4911
MCP4921
(a) Single Output DAC:
(b) Dual Output DAC:
MCP4902
MCP4912
MCP4922
相關(guān)PDF資料
PDF描述
MS27474T18A35S CONN RCPT 66POS JAM NUT W/SCKT
MCP795W10T-I/SL IC RTCC 1KB EE WD/EVENT 14SOIC
VE-JTK-MZ CONVERTER MOD DC/DC 40V 25W
MS27656E13A22S CONN RCPT 22POS WALL MNT W/SCKT
VE-J0F-MZ CONVERTER MOD DC/DC 72V 25W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP795W11 制造商:MAS 制造商全稱:MAS 功能描述:SPI Real-Time Clock Calendar
MCP795W11-I/SL 功能描述:實時時鐘 1Kb EE 64B SRAM WD TED EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP795W11-I/ST 功能描述:實時時鐘 1Kb EE 64B SRAM WD TED EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP795W11T-I/SL 功能描述:實時時鐘 1Kb EE 64B SRAM WD TED EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
MCP795W11T-I/ST 功能描述:實時時鐘 1Kb EE 64B SRAM WD TED EUI-48 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube