参数资料
| 型号： | DS1841N+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/17页 |
| 文件大小： | 0K |
| 描述： | IC RES LOG NV I2C 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接片： | 128 |
| 电阻（欧姆）： | 22k |
| 电路数： | 1 |
| 温度系数： | 标准值 ±250 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1841T+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841T+T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841X | 功能描述:数字电位计 IC Temp-Cntrlld NV I2C Logarithmic Resistor RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1842 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:76V, APD, Bias Output Stage with Current Monitoring |
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