參數(shù)資料
型號： DS1857E-050+
廠商： Maxim Integrated Products
文件頁數(shù)： 22/22頁
文件大?。?/td> 0K
描述： IC RES TEMP 50/50K 2MON 16-TSSOP
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 96
接片： 256
電阻（歐姆）： 50k
電路數(shù)： 2
溫度系數(shù)： 標準值 50 ppm/°C
存儲器類型： 非易失
接口： I²C（設備位址）
電源電壓： 3 V ~ 5.5 V
工作溫度： -40°C ~ 95°C
安裝類型： 表面貼裝
封裝/外殼： 16-TSSOP（0.173"，4.40mm 寬）
供應商設備封裝： 16-TSSOP
包裝： 管件
DS1857
Dual Temperature-Controlled Resistors with
External Temperature Input and Monitors
_____________________________________________________________________
9
Monitored Signals
Each signal (VCC, MON1, MON2, and temperature) is
available as a 16-bit value with 12-bit accuracy (left-jus-
tified) over the serial bus. See Table 1 for signal scales
and Table 2 for signal format. The four LSBs should be
masked when calculating the value.
The signals are updated every frame rate (tframe) in a
round-robin fashion.
The comparison of all four signals with the high and low
user-defined values are done automatically. The corre-
sponding flags are set to 1 within a specified time of
the occurrence of an out-of-limit condition.
Calculating Signal Values
The LSB = 100V for VCC, and the LSB = 38.147V for
the MON signals.
To calculate the value of VCC, convert the unsigned 16-
bit value to decimal and multiply by 100V.
To calculate the value of MON1 or MON2, convert the
unsigned 16-bit value to decimal and multiply by
38.147V.
To calculate the value of the temperature, treat the
two’s complement value binary number as an unsigned
binary number, then convert to decimal and divide by
256. If the result is greater than or equal to 128, then
subtract 256 from the result.
Temperature: high byte: -128°C to +127°C signed; low
byte: 1/256°C.
SIGNAL
+FS
SIGNAL
+FS
(hex)
-FS
SIGNAL
-FS
(hex)
Temperature
127.996
°C
7FFF
-128
°C
8000
VCC
6.55V
FFFF
0V
0000
MON1
2.5V
FFFF
0V
0000
MON2
2.5V
FFFF
0V
0000
Table 1. Scales for Monitor Channels
SIGNAL
FORMAT
VCC
Unsigned
MON1
Unsigned
MON2
Unsigned
Temperature
Two’s complement
Table 2. Signal Comparison
TEMPERATURE
CORRESPONDING LOOK-UP
TABLE ADDRESS
<-40
°C
80h
-40
°C
80h
-38
°C
81h
-36
°C
82h
-34
°C
83h
——
+98
°C
C5h
+100
°C
C6h
+102
°C
C7h
>+102
°C
C7h
Table 3. Look-up Table Address for
Corresponding Temperature Values
MSB
215
214
213
212
211
210
29
28
LSB
27
26
25
24
23
22
21
20
MSB (BIN)
LSB (BIN)
VOLTAGE (V)
10000000
3.29
11000000
11111000
4.94
S26
25
24
23
22
21
20
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
MSB (BIN)
LSB (BIN)
TEMPERATURE (
°C)
01000000
00000000
64
01000000
00001111
64.059
01011111
00000000
95
11110110
00000000
-10
11011000
00000000
-40
MSB (BIN)
LSB (BIN)
VOLTAGE (V)
11000000
00000000
1.875
10000000
1.255
Monitor VCC Bit Weights
Temperature Bit Weights
Temperature Conversion Example
VCC Conversion Example
Monitor Conversion Example
相關PDF資料
PDF描述
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相關代理商/技術參數(shù)
參數(shù)描述
DS1857E-050/R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual Temperature-Controlled Resistors with External Temperature Input and Monitors
DS1857E-050/T 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual Temperature-Controlled Resistors with External Temperature Input and Monitors
DS1857E-050+ 功能描述:數(shù)字電位計 IC Dual Temp-Controlled Resistors 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
DS1858 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual Temperature-Controlled Resistors with Three Monitors
DS1858B-050 功能描述:數(shù)字電位計 IC 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
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