參數(shù)資料
型號(hào)： DS1856E-025R
廠商： Maxim Integrated Products, Inc.
英文描述： Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection
中文描述： 雙路，溫度與內(nèi)部校準(zhǔn)監(jiān)視器和控制電阻器，密碼保護(hù)
文件頁數(shù)： 10/31頁
文件大?。?/td> 484K
代理商： DS1856E-025R
D
Dual, Temperature-Controlled Resistors with Inter-
nally Calibrated Monitors and Password Protection
10
____________________________________________________________________
Monitored Signals
Each signal (V
CC
, MON1, MON2, MON3, and tempera-
ture) is available as a 16-bit value with 12-bit accuracy
(left-justified) 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 3
LSBs are internally masked with 0s.
The signals are updated every frame rate (t
frame
) in a
round-robin fashion.
The comparison of all five 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 = 100μV for V
CC
, and the LSB = 38.147μV for
the MON signals when using factory default settings.
To calculate V
CC
, convert the unsigned 16-bit value to
decimal and multiply by 100μV.
To calculate MON1, MON2, or MON3, convert the
unsigned 16-bit value to decimal and multiply by
38.147μV.
To calculate the temperature, treat the two’s comple-
ment value binary number as an unsigned binary num-
ber, then convert to decimal and divide by 256. If the
result is greater than or equal to 128, 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 +127.984
°
V
CC
MON1
MON2
MON3
7FFC
FFF8
FFF8
FFF8
FFF8
-128
°
C
0V
0V
0V
0V
8000
0000
0000
0000
0000
6.5528V
2.4997V
2.4997V
2.4997V
Table 1. Scales for Monitor Channels at
Factory Setting
SIGNAL
V
CC
MON1
MON2
MON3
Temperature
FORMAT
Unsigned
Unsigned
Unsigned
Unsigned
Two’s complement
Table 2. Signal Comparison
TEMPERATURE
(°C)
CORRESPONDING LOOK-UP
TABLE ADDRESS
<-40
-40
-38
-36
-34
—
+98
+100
+102
>+102
80h
80h
81h
82h
83h
—
C5h
C6h
C7h
C7h
Table 3. Look-Up Table Address for
Corresponding Temperature Values
MSB
LSB
2
15
2
7
2
14
2
6
2
13
2
5
2
12
2
4
2
11
2
3
2
10
2
2
2
9
2
1
2
8
2
0
MSB (BIN)
10000000
11000000
LSB (BIN)
10000000
11111000
VOLTAGE (V)
3.29
4.94
S
2
6
2
-2
2
5
2
-3
2
4
2
-4
2
3
2
-5
2
2
2
-6
2
1
2
-7
2
0
2
-8
2
-1
MSB (BIN)
01000000
01000000
01011111
11110110
11011000
LSB (BIN)
00000000
00001111
00000000
00000000
00000000
TEMPERATURE (
°
C)
+64
+64.059
+95
-10
-40
MSB (BIN)
11000000
10000000
LSB (BIN)
00000000
10000000
VOLTAGE (V)
1.875
1.255
Monitor/V
CC
Bit Weights
Temperature Bit Weights
Monitor Conversion Example
V
CC
Conversion Examples
Temperature Conversion Examples
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1856E-025T 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection
DS1856E-030 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection
DS1856E-030/R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection
DS1856E-030/T 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors and Password Protection
DS1856E-030+ 功能描述:數(shù)字電位計(jì) 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(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
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