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DS1841
Temperature-Controlled, NV, I2C,
Logarithmic Resistor
______________________________________________________________________________________
11
Register 03h: Control Register 1 (CR1)
FACTORY DEFAULT
03h
MEMORY TYPE
Shadowed NV
03h
Reserved
Adder Mode
Update Mode
Bit 7
Bit 0
Bits 7 to 2
Reserved.
Bit 1
Adder Mode This bit is valid only if the Update Mode bit = 1.
0 = The LUTVAL or IVR value is directly loaded to WR though the mux.
1 = (Default) The LUTVAL is summed with the IVR value and is directly loaded to WR though the mux.
Bit 0
Update Mode
0 = CR0 is enabled. During power-up the IVR value is loaded into the WR to set the wiper position.
Updates to Temperature Result (0Ch) and Supply Voltage Result (0Eh) are halted.
1 = (Default) The WR is controlled directly by I2C communication though registers 08h or 09h, or the WR
is controlled by the temperature-compensation/LUT circuitry. If temperature compensation is enabled,
one of the 72 temperature slots is selected (by the LUTAR) and this slot value is copied into the
LUTVAL, which in turn sets the WR. Updates to Temperature Result (0Ch) and Supply Voltage Result
(0Eh) are enabled.
Control Register 1 controls how the wiper position is determined. The
SEE bit controls whether the values of this register
are stored in EEPROM or in Shadowed SRAM. On power-up, the EEPROM value is recalled to this register, regardless of
the state of
SEE.
While the registers other than 00h through 0Ah can be read, they are not updated by the ADC as the ADC is disabled
with the Update Mode bit = 0.
Register 08h: LUT Address Register (LUTAR)
FACTORY DEFAULT
00h
POR DEFAULT
00h until tFRAME
MEMORY TYPE
Volatile
08h
LUTAR
Bit 7
Bit 0
The LUTAR register serves as the index pointer to choose the corresponding temperature slot in the LUT based on the
internal temperature sensor result. The LUTAR can be directly read by acessing address 08h; however, to write an new
value to LUTAR (to control WR manually), the LUTAR Mode bit must be set to a 1.
Register 09h: LUT Value Register (WR*)
FACTORY DEFAULT
00h
MEMORY TYPE
Volatile
09h
WR*
Bit 7
Bit 0
WR serves as an intermediate location, which is populated automatically with the results of the temperature-indexed
lookup. The WR can be directly read by acessing address 09h; however to write an new value to WR (to control it
manually), the wiper access control bit must be set to a 1. WR is an unsigned 7-bit value.
*WR is updated every tFRAME if Update Mode bit = 1. If Update Mode bit = 0, WR holds the value stored in register 00h.
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參數(shù)描述 |
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| DS1841N+ | 功能描述:數(shù)字電位計(jì) IC Temp-Cntrlld NV I2C Logarithmic Resistor RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS1841N+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP-CNTRLD, NV, I2C, LOGARITHMIC RES - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RES LOG NV I2C 10-TDFN |
| DS1841N+T&R | 功能描述:數(shù)字電位計(jì) IC Temp-Cntrlld NV I2C Logarithmic Resistor RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| DS1841T+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841T+T&R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
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