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參數資料
| 型號： | ADS7830IPWT |
| 英文描述： | 8-Bit, 8-Channel Sampling ANALOG-TO-DIGITAL CONVERTER with I2C⑩ Interface |
| 中文描述： | 8位，8通道采樣模擬到數字轉換接口的I2C⑩ |
| 文件頁數： | 11/16頁 |
| 文件大?。?/td> | 251K |
| 代理商： | ADS7830IPWT |
ADS7830
SBAS302
11
www.ti.com
Address Byte
Command Byte
The address byte is the first byte received following the
START condition from the master device. The first five bits
(MSBs) of the slave address are factory pre-set to 10010.
The next two bits of the address byte are the device select
bits, A1 and A0. Input pins (A1-A0) on the ADS7830 deter-
mine these two bits of the device address for a particular
ADS7830. A maximum of four devices with the same pre-set
code can therefore be connected on the same bus at one
time.
The A1-A0 Address Inputs can be connected to V
DD
or digital
ground. The device address is set by the state of these pins
upon power-up of the ADS7830.
The last bit of the address byte (R/W) defines the operation
to be performed. When set to a
“
1
”
a read operation is
selected; when set to a
“
0
”
a write operation is selected.
Following the START condition the ADS7830 monitors the
SDA bus, checking the device type identifier being transmit-
ted. Upon receiving the 10010 code, the appropriate device
select bits, and the R/W bit, the slave device outputs an
acknowledge signal on the SDA line.
MSB
6
5
4
3
2
1
LSB
SD
C2
C1
C0
PD1
PD0
X
X
The ADS7830
’
s operating mode is determined by a com-
mand byte which is illustrated above.
SD: Single-Ended/Differential Inputs
0: Differential Inputs
1: Single-Ended Inputs
C2 - C0: Channel Selections
PD1 - 0: Power-Down Selection
X: Unused
See Table I for Truth Table.
MSB
6
5
4
3
2
1
LSB
1
0
0
1
0
A1
A0
R/W
PD1
PD0
DESCRIPTION
0
0
1
1
0
1
0
1
Power Down Between A/D Converter Conversions
Internal Reference OFF and A/D Converter ON
Internal Reference ON and A/D Converter OFF
Internal Reference ON and A/D Converter ON
POWER-DOWN SELECTION
INITIATING CONVERSION
Provided the master has write-addressed it, the ADS7830
turns on the A/D converter
’
s section and begins conversions
when it receives BIT 4 of the command byte shown in the
Command Byte. If the command byte is correct, the ADS7830
will return an ACK condition.
CHANNEL SELECTION CONTROL
SD
C2
C1
C0
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
0
0
0
0
+IN
–
IN
—
—
—
—
—
—
—
0
0
0
1
—
—
+IN
–
IN
—
—
—
—
—
0
0
1
0
—
—
—
—
+IN
–
IN
—
—
—
0
0
1
1
—
—
—
—
—
—
+IN
–
IN
—
0
1
0
0
–
IN
+IN
—
—
—
—
—
—
—
0
1
0
1
—
—
–
IN
+IN
—
—
—
—
—
0
1
1
0
—
—
—
—
–
IN
+IN
—
—
—
0
1
1
1
—
—
—
—
—
—
–
IN
+IN
—
1
0
0
0
+IN
—
—
—
—
—
—
—
–
IN
1
0
0
1
—
—
+IN
—
—
—
—
—
–
IN
1
0
1
0
—
—
—
—
+IN
—
—
—
–
IN
1
0
1
1
—
—
—
—
—
—
+IN
—
–
IN
1
1
0
0
—
+IN
—
—
—
—
—
—
–
IN
1
1
0
1
—
—
—
+IN
—
—
—
—
–
IN
1
1
1
0
—
—
—
—
—
+IN
—
—
–
IN
1
1
1
1
—
—
—
—
—
—
—
+IN
–
IN
TABLE I. Channel Selection Control Addressed by Command BYTE.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADS7830IPWT | 制造商:Texas Instruments 功能描述:A/D Converter (A-D) IC |
| ADS7830IPWTG4 | 功能描述:模數轉換器 - ADC 8-Bit 8-Ch Sampling w/I2C Interface 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 |
| ADS7831 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit 600kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER |
| ADS7831 WAF | 制造商:Texas Instruments 功能描述: |
| ADS7831P | 制造商:Rochester Electronics LLC 功能描述:12-BIT, 600KHZ,SAMPLING A/D - Bulk |
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