参数资料
型号: THS1209IDAR
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32
封装: GREEN, PLASTIC, TSSOP-32
文件页数: 13/33页
文件大小: 312K
代理商: THS1209IDAR
THS1209
SLAS288B – JULY 2000 – REVISED DECEMBER 2002
www.ti.com
20
ADC CONTROL REGISTERS
Control Register 0 (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 selected.
Bit 0 = 1
→ The external reference voltage is selected.
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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THS1209IDA 2-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32
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