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參數資料
| 型號： | DS2450 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1-Wire Quad A/D Converter(1線串行四路A/D轉換器) |
| 中文描述： | 四路、1-Wire A/D轉換器 |
| 文件頁數： | 4/23頁 |
| 文件大?。?/td> | 165K |
| 代理商： | DS2450 |
DS2450
091598 4/23
64–BIT LASERED ROM
Figure 3
8–BIT CRC CODE
48–BIT SERIAL NUMBER
8–BIT FAMILY CODE (20H)
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
1–WIRE CRC–GENERATOR
Figure 4
1ST
STAGE
2ND
STAGE
3RD
STAGE
4TH
STAGE
5TH
STAGE
6TH
STAGE
7TH
STAGE
8TH
STAGE
X
0
X
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
Polynomial = X
8
+ X
5
+ X
4
+ 1
XOR
XOR
XOR
INPUT
DEVICE REGISTERS
All registers of the DS2450 are mapped into a linear
memory range of 24 adjacent bytes organized as three
8–byte pages. The first page, called conversion read–
out, contains the memory area where the chip–internal
logic places the results of a conversion for the bus mas-
ter to read. Starting with channel A at the lowest
address, each channel has an area of 16 bits assigned
for the conversion result, as shown in Figure 5a. The
power–on default for the conversion read–out registers
is all zeros. Regardless of the resolution requested, the
most significant bit of the conversion is always at the
same bit position. If less than 16–bit resolution is
requested, the least significant bits of the conversion
result will be filled with zeros in order to always generate
a 16–bit result. For applications that require less than
four analog inputs, one should start using input D for the
first channel, input C for the second one, etc. The
advantage is that when reading the conversion results
one reaches the end of the page and with it the CRC16
sooner and minimizes the traffic on the 1–Wire bus. For
more details on reading please refer to the Read
Memory command description.
MEMORY MAP PAGE 0, CONVERSION READ–OUT
Figure 5a
Address
bit 7
bit 6
00
A
A
01
MSBIT A
A
B
B
bit 5
A
bit 4
A
bit 3
A
bit 2
A
bit 1
A
bit 0
LSBIT A
A
A
A
A
A
A
02
03
04
05
06
B
B
B
B
B
LSBIT B
MSBIT B
B
B
B
B
B
B
B
C
C
C
C
C
C
C
LSBIT C
MSBIT C
C
C
C
C
C
C
C
D
D
D
D
D
D
D
LSBIT D
07
MSBIT D
D
D
D
D
D
D
D
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS2450S | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| DS2450S/T&R | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| DS2450S+ | 功能描述:模數轉換器 - ADC Quad 1-Wire RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| DS2450S+ | 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW)) |
| DS2450S+T&R | 制造商:Maxim Integrated Products 功能描述:IC CONVERTER A/D QUAD 1-W 8-SOIC |
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