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| 型号： | DS1857B-050 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/22页 |
| 文件大小： | 0K |
| 描述： | IC RES TEMP 50/50K W/2MON 16-BGA |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 810 |
| 接片： | 256 |
| 电阻（欧姆）： | 50k |
| 电路数： | 2 |
| 温度系数： | 标准值 50 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 95°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-LBGA，CSPBGA |
| 供应商设备封装： | 16-CSBGA（4x4） |
| 包装： | 托盘 |
DS1857
Dual Temperature-Controlled Resistors with
External Temperature Input and Monitors
_____________________________________________________________________
7
Detailed Description
The user can read the registers that monitor the VCC,
MON1, MON2, and temperature analog signals. After
each signal conversion, a corresponding bit is set that
can be monitored to verify that a conversion has
occurred. The signals also have alarm flags that notify
the user when the signals go above or below the user-
defined value. Interrupts can also be set for each signal.
The position values of each resistor can be indepen-
dently programmed. The user can assign a unique
value to each resistor for every 2°C increment over the
-40°C to +102°C range. Both resistors can also be put
in a high-impedance mode using the RHIZ pin.
An external temperature sense input, EXTTMP, con-
verts an analog voltage into a digital value that repre-
sents temperature. Its scale is defined by +10mV/°C
gain and +500mV offset at 0°C. This corresponds to the
characteristics of the LM50 temperature sensor. The
resistor look-up tables are stepped through according
to this temperature every 2°C from -40°C to +102°C.
PIN
BALL
NAME
FUNCTION
1B2
SDA
2-Wire Serial Data Interface. This pin is for serial data transfer to and from the device.
2A2
SCL
2-Wire Serial Clock Interface. The serial clock input is used to clock data into and out of the device.
3C3A0
Address Input. The address input pins specify the 2-wire address of the device (when ADFIX = 0).
4A1A1
Address Input. The address input pins specify the 2-wire address of the device (when ADFIX = 0).
5B1A2
Address Input. The address input pins specify the 2-wire address of the device (when ADFIX = 0).
6C2
WPEN
Write Protect Enable. The device is not write protected if WPEN is connected to ground. This pin has
an internal pullup (RWPEN) (See Table 6).
7C1
RHIZ
Resistor Disable Input. When high, this signal places both resistors in an off state or high impedance
mode. When low, the resistors are on. This pin has an internal pullup (RRHIZ).
8D1
GND
Supply Ground
9D3
MON1
External Analog Input
10
D4
MON2
External Analog Input
11
C4
EXTTMP
External Temperature Input. This analog signal is converted into a digital value that represents a
temperature. The digitized value indexes through the look-up tables.
12
D2
L0
Low-End Resistor 0 Terminal. It is not required that the low-end terminals be connected to a potential
less than the high-end terminal of the corresponding resistor. Voltage applied to any of the resistor
terminals cannot exceed the power-supply voltage, VCC, or go below ground.
13
B3
H0
High-End Resistor 0 Terminal. It is not required that the high-end terminals be connected to a
potential greater than the low-end terminal of the corresponding resistor. Voltage applied to any of the
resistor terminals cannot exceed the power-supply voltage, VCC, or go below ground.
14
B4
L1
Low-End Resistor 1 Terminal
15
A4
H1
High-End Resistor 1 Terminal.
16
A3
VCC
Supply Voltage
Pin Descriptions
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1857B-050+ | 功能描述:数字电位计 IC Dual Temp-Controlled Resistors 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 |
| DS1857E-050 | 功能描述:数字电位计 IC 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 |
| DS1857E-050/R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual Temperature-Controlled Resistors with External Temperature Input and Monitors |
| DS1857E-050/T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual Temperature-Controlled Resistors with External Temperature Input and Monitors |
| DS1857E-050+ | 功能描述:数字电位计 IC Dual Temp-Controlled Resistors 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 |
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