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參數(shù)資料
型號(hào)： AD7708BR
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： Shaft; Style: 2 - light; Applicable Model: LE-P / LEL-W
中文描述： 10-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28
封裝： PLASTIC, SOIC-28
文件頁數(shù)： 28/44頁
文件大小： 339K
代理商： AD7708BR
REV. 0
–28–
AD7708/AD7718
Operating Characteristics when Addressing the Mode and Control Registers
1. Any change to the MD bits will immediately reset the ADCs. A write to the MD2–MD0 bits with no change is also treated as a reset.
2. Once the MODE has been written with a calibration mode, the RDY bit (STATUS) is immediately reset and the calibration
commences. On completion the appropriate calibration registers are written, the bit in STATUS register is updated and the
MD2–MD0 bits are reset to 001 to indicate the ADC is back in idle mode.
3. Calibrations are performed with the maximum allowable SF value with chop enabled. SF register is reset to user configuration
after calibration with chop enabled. Calibrations are performed with the selected value of SF when chop is disabled.
ADC Control Register (ADCCON): (A3, A2, A1, A0 = 0, 0, 1, 0; Power-On-Reset = 07 Hex)
The ADC Control Register is an 8-bit register from which data can be read or to which data can be written. This register is used to
configure the ADC for range, channel selection, and unipolar or bipolar coding. Table XVI outlines the bit designations for the ADC
control register ADCCON7 through ADCCON0 indicate the bit location, ADCCON denoting the bits are in the ADC Control
Register. ADCCON7 denotes the first bit of the data stream. The number in brackets indicates the power-on/reset default status of
that bit.
Table XVI. ADC Control Register (ADCCON) Bit Designations
Bit
Location
Bit
Mnemonic
Description
ADCCON7
ADCCON6
ADCCON5
ADCCON4
CH3
CH2
CH1
CH0
ADC Channel Selection Bits. Written by the user to select either pseudo-differential or fully-
differential input pairs used by the ADC as follows:
8-Channel Configuration
(CHCON = 0)
Positive
Input
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN1
AIN3
AIN5
AIN7
AIN2
AINCOM
REFIN(+)
OPEN
10-Channel Configuration
(CHCON = 1)
Positive
Input
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN1
AIN3
AIN5
AIN7
AIN9
AINCOM
AIN9
AIN10
Negative
Input
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AIN2
AIN4
AIN6
AIN8
AIN2
AINCOM
REFIN(–)
OPEN
Cal Register
Pair
1
2
3
4
1
2
3
4
1
2
3
4
1
1
1
1
Negative
Input
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AINCOM
AIN2
AIN4
AIN6
AIN8
AIN10
AINCOM
AINCOM
AINCOM
Cal Register
Pair
1
2
3
4
5
1
2
3
1
2
3
4
5
1
4
5
CH3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CH2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ADCCON3
U/
B
Unipolar/Bipolar Bit.
Set
by user to enable unipolar coding i.e., zero differential input will result in 000000hex
output and a full-scale differential input will result in FFFFFF Hex output when operated in
24-bit mode.
Cleared
by user to enable bipolar coding, Negative full-scale differential input will result in an
output code of 000000 Hex, zero differential input will result in an output code of 800000 Hex
and a positive full-scale differential input will result in an output code of FFFFFF Hex.
ADCCON7
ADCCON6
ADCCON5
ADCCON4
ADCCON3
ADCCON2
ADCCON1
ADCCON0
CH3 (0)
CH2 (0)
CH1 (0)
CH0 (0)
U/
B
(0)
RN2 (1)
RN1 (1)
RN0 (1)
相關(guān)PDF資料
PDF描述
AD7708BRU 8-/10-Channel, Low Voltage, Low Power, ADCs
AD7708 8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718 8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BR 8-/10-Channel, Low Voltage, Low Power, ADCs
AD7718BRU 8-/10-Channel, Low Voltage, Low Power, ADCs
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