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參數(shù)資料
| 型號(hào)： | DS1841N+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC RES LOG NV I2C 10-TDFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接片： | 128 |
| 電阻（歐姆）： | 22k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 ±250 ppm/°C |
| 存儲(chǔ)器類型： | 非易失 |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 100°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 10-TDFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
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DS1841
Temperature-Controlled, NV, I2C,
Logarithmic Resistor
8
_______________________________________________________________________________________
Temperature Conversion and Supply
Voltage Monitoring
Temperature Conversion
The DS1841 features an internal 8-bit temperature sen-
sor that can drive the LUT and provide a measurement
of the ambient temperature over I2C by reading the
value stored in address 0Ch. The sensor is functional
over the entire operating temperature range and is
stored in signed two’s complement format with a resolu-
tion of 1°C/bit. See Table 2, Register 0Ch description for
the temperature sensor’s bit weights. To calculate the
temperature, treat the two’s complement binary value as
an unsigned binary number, then convert it to decimal.
If the result is greater than or equal to 128, subtract 256
from the result.
LUT
The DS1841 monitors the internal temperature by
repeatedly polling the sensor’s result with update rate
tFRAME. During each cycle, the DS1841 reads the inter-
nal temperature, and, based on that temperature,
points to the corresponding LUT address. Every two
degrees of temperature will convert into one tempera-
ture address slot. See Table 3 for a list of temperatures
and their corresponding LUT addresses.
The LUT features one-degree hysteresis to prevent
chattering if the measured temperature falls on the
boundary between two windows (see Figure 1).
Table 3. LUT Registers and Temperature Ranges
TEMPERATURE (°C)
TEMPERATURE VALUE FOR GIVEN
TEMPERATURE (HEX)
CORRESPONDING LUT ADDRESS
(HEX)
-40 or less
D8
80
-39 to -38
D9 to DA
81
-37 to -36
DB to DC
82
-35 to -34
DD to DE
83
—
+95 to +96
5F to 60
C4
+97 to +98
61 to 62
C5
+99 to +100
63 to 64
C6
+101 or more
65
C7
LUT Mode and LUT Adder Mode Block Diagram (Update Mode Bit = 1)
1OF
128
MULTIPLEXERS
IVR
ON
POWER-UP
ONLY
WHEN
IN
LUT
ADDER
MODE
INITIAL VALUE REGISTER (IVR)
00h*
CONTROL
LOGIC/
REGISTERS
LUT
ADDRESS
REGISTER
(LUTAR)
08h
72-BYTE
LOOKUP
TABLE
(LUT)
80h–C7h
WIPER
REGISTER
(WR)
09h*
ADC
I2C
INTERFACE
TEMP
SENSOR
VCC
VOLTAGE
TEMP
0Ch
VCC (V)
0Eh
VCC
GND
SCL
SDA
A0
A1
POS 7Fh
POS 00h
RS
RGND
RW
RH
CONTROL
DATA
*NOTE THAT WHEN IN LUT OR LUT ADDER MODE, WR IS ACCESSED THROUGH 09h WHILE IVR REMAINS AT 00h.
∑
LUTVAL
OR
LUTVAL+IVR
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| DS1841T+TR | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841X | 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 |
| DS1842 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:76V, APD, Bias Output Stage with Current Monitoring |
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