参数资料
| 型号： | DS1841N+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/17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
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
SDA
I2C Serial Data. Input/output for I2C data.
2
GND
Ground
3
VCC
Power Supply
4
A1
5
A0
Address Select Inputs. Determines I2C slave address. Device address is 01010A1A0X (see the
Slave Address Byte and Address Pins sections for more details).
6
RGND
Low Terminal of Resistor. Must be connected to GND.
7
RW
Wiper Terminal
8
RH
Terminal with Fixed Resistor Added in Series with Digital Resistor
9
N.C.
No Connection
10
SCL
I2C Serial Clock. Input for I2C clock.
—
EP
Exposed Paddle. Must be connected to ground.
Detailed Description
The DS1841 operates in one of two modes: LUT Mode
and LUT Adder Mode. In LUT Mode and LUT Adder
Mode, the resistor’s wiper position is controlled as a
function of the temperature measured by the DS1841’s
internal temperature sensor. The difference between
the two LUT modes is the way the resistor’s wiper posi-
tion is calculated. Detailed descriptions of these two
modes, as well as additional features of the DS1841,
are discussed in subsequent sections.
Digital Resistor Description
The DS1841’s resistor consists of 128 resistive steps
between RW and RGND with a series resistor, RS,
between RH and RW. The wiper position and the output
seen on RW are decoded based on the value in the
wiper register (WR). The step size of each position is
optimized to produce a linear response when used in
the feedback network of a DC-DC converter.
Mode Selection
The DS1841 mode of operation is determined by the
Update Mode bit (Control Register 1, address 03h, bit 0)
and the Adder Mode bit (Control Register 1, address
03h, bit 1). Table 1 illustrates how the two control bits
are used to select the operating mode. When shipped
from the factory, the DS1841 is programmed with the
Update Mode and Adder Mode bits set to 1, hence con-
figuring the DS1841 in LUT Adder Mode. See Appendix
A for a detailed table of the control logic bit functions.
Table 1. Operating Modes
UPDATE MODE
BIT
ADDER MODE BIT
MODE
1
0
LUT Mode
1
LUT Adder Mode
(Default)
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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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