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| 型號(hào)： | EVAL-AD7150EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7150 |
| 特色產(chǎn)品： | AD715x Series Capacitance-to-Digital Converters & Evaluation Board |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感器類型： | 觸摸，電容式 |
| 接口： | I²C |
| 電源電壓： | 2.7 V ~ 3.6 V |
| 嵌入式： | 否 |
| 已供物品： | 板，電池 |
| 已用 IC / 零件： | AD7150 |
| 產(chǎn)品目錄頁面： | 781 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | AD7150BRMZ-REEL-ND - IC CAP CONV 2CH ULT LP 10MSOP AD7150BRMZ-ND - IC CAP CONV 2CH ULT LP 10MSOP |
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AD7150
Rev. 0 | Page 20 of 28
POWER-DOWN TIMER REGISTER
Address Pointer 0x10
8 Bits, Read/Write, Factory Preset 0x00
Table 14. Power-Down Timer Register Bit Map
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
–
Power-Down Timeout (6-Bit Value)
Default
0
0x00
Table 15.Power-Down Timer Register Bit Descriptions
Bit
Mnemonic
Description
[7:6]
–
These bits must be 0 for proper operation.
[5:0]
Power-Down
Timeout
Defines period duration of the power-down timeout.
If the output comparator outputs have not been activated during the programmed period, the part enters
power-down mode automatically. The part can be then returned to a normal operational mode either via the
serial interface or by the power supply off/on sequence.
The period is programmable in steps of four hours. For example, setting the value to 0x06 sets the duration to
24 hours. The maximum value of 0x3F corresponds to approximately 10.5 days.
The value of 0x00 disables the power-down timeout, and the part does not enter power-down mode
automatically.
CAPDAC REGISTERS
Ch1 Address Pointer 0x11
Ch2 Address Pointer 0x12
8 Bits, Read/Write, Factory Preset 0x00
Table 16. CAPDAC Registers Bit Map
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
DacEn
DacAuto
DacValue (6-Bit Value)
Default
1
0x00
Table 17. CAPDAC Registers Bit Descriptions
Bit
Mnemonic
Description
7
DacEn
DacEn = 1 enables capacitive DAC.
6
DacAuto
DacAuto = 1 enables the AutoDAC function in the adaptive threshold mode.
When the AutoDAC function is enabled, the part dynamically adjusts the CAPDAC to keep the CDC in an
optimal operating capacitive range. The CAPDAC value is automatically incremented when the data average
exceeds of the CDC full range, and the CAPDAC value is decremented when the data average goes below
of the CDC full range. The AutoDAC increment or decrement step depends on the selected CDC capacitive
input range.
Bit has no effect in fixed threshold mode; the AutoDAC function is always disabled in the fixed threshold mode.
[5:0]
DacValue
CAPDAC value, Code 0x00
≈ 0 pF, Code 0x3F ≈ CAPDAC full range.
SERIAL NUMBER REGISTER
Address Pointer 0x13, 0x14, 0x15, 0x16
32 Bits, Read-Only, 0xXXXX
This register holds a serial number, unique for each individual part.
CHIP ID REGISTER
Address Pointer 0x17
8 Bits, Read-Only, 0xXX
This register holds the chip identification code, used in factory
manufacturing and testing.
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