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| 型号： | THS1009IDA |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32 |
| 封装： | GREEN, PLASTIC, TSSOP-32 |
| 文件页数： | 10/30页 |
| 文件大小： | 294K |
| 代理商： | THS1009IDA |
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THS1009
SLAS287A – AUGUST 2000 – REVISED DECEMBER 2002
www.ti.com
18
ADC CONTROL REGISTERS
Control Register 0, Write Only (see Table 8)
BIT 11
BIT 10
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0
TEST1
TEST0
SCAN
DIFF1
DIFF0
CHSEL1
CHSEL0
PD
RES
VREF
Table 8. Control Register 0 Bit Functions
BITS
RESET
VALUE
NAME
FUNCTION
0
VREF
Vref select:
Bit 0 = 0
→ The internal reference is used
Bit 0 = 1
→ The external reference voltage is used for the ADC
1
0
RES
Reserved
2
0
PD
Power down.
Bit 2 = 0
→ The ADC is active
Bit 2 = 1
→ Power down
The reading and writing to and from the digital outputs is possible during power down.
3, 4
0,0
CHSEL0,
CHSEL1
Channel select
Bit 3 and bit 4 select the analog input channel of the ADC. Refer to Table 9.
5,6
1,0
DIFF0, DIFF1
Number of differential channels
Bit 5 and bit 6 contain information about the number of selected differential channels. Refer to Table 9.
7
0
SCAN
Autoscan enable
Bit 7 enables or disables the autoscan function of the ADC. Refer to Table 9.
8,9
0,0
TEST0,
TEST1
Test input enable
Bit 8 and bit 9 control the test function of the ADC. Three different test voltages can be measured. This
feedback allows the check of all hardware connections and the ADC operation.
Refer to Table 10 for selection of the three different test voltages.
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