參數(shù)資料
型號: EVAL-AD7193EBZ
廠商: Analog Devices Inc
文件頁數(shù): 22/57頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR AD7193
設計資源: EVAL-AD7193 Schematic
AD7193 Gerber Files
標準包裝: 1
ADC 的數(shù)量: 1
位數(shù): 24
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
工作溫度: -40°C ~ 105°C
已用 IC / 零件: AD7193
已供物品: 板,線纜
AD7193
Data Sheet
Rev. D | Page 28 of 56
Bit Location
Bit Name
Description
CON4
BUF
Enables the buffer on the analog inputs.
If BUF is set, the analog inputs are buffered, allowing the user to place source impedances on the front
end without contributing gain errors to the system. When the buffer is enabled, it requires some head-
room; therefore, the voltage on any input pin must be limited to 250 mV within the power supply rails.
If cleared, the analog inputs are unbuffered, lowering the power consumption of the device. With the
buffer disabled, the voltage on the analog input pins can be from 50 mV below AGND to 50 mV above AVDD.
CON3
U/B
Polarity select bit.
When this bit is set, unipolar operation is selected.
When this bit is cleared, bipolar operation is selected.
CON2 to CON0
G2 to G0
Gain select bits. These bits are written by the user to select the ADC input range as follows:
G2
G1
G0
Gain
ADC Input Range (2.5 V Reference)
0
1
±2.5 V
0
1
Reserved
0
1
0
Reserved
0
1
8
±312.5 mV
1
0
16
±156.2 mV
1
0
1
32
±78.125 mV
1
0
64
±39.06 mV
1
128
±19.53 mV
Table 23. Channel Selection (Pseudo Bit = 0)
Channel Enable Bits in the Configuration Register
Channel Enabled
Status
Register
Bits CHD[3:0]
Calibration
Register
Pair
Short
TEMP
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
Positive
Input AIN(+)
Negative
Input AIN()
1
AIN1
AIN2
0000
0
1
AIN3
AIN4
0001
1
AIN5
AIN6
0010
2
1
AIN7
AIN8
0011
3
1
AIN1
AIN2
0100
0
1
AIN3
AIN4
0101
1
AIN5
AIN6
0110
2
1
AIN7
AIN8
0111
3
1
Temperature sensor
1000
1
AIN2
1001
0
Table 24. Channel Selection (Pseudo Bit = 1)
Channel Enable Bits in the Configuration Register
Channel Enabled
Status
Register
Bits CHD[3:0]
Calibration
Register Pair
Short
TEMP
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
Positive
Input AIN(+)
Negative
Input AIN()
1
AIN1
AINCOM
0000
0
1
AIN2
AINCOM
0001
1
AIN3
AINCOM
0010
2
1
AIN4
AINCOM
0011
3
1
AIN5
AINCOM
0100
4
1
AIN6
AINCOM
0101
4
1
AIN7
AINCOM
0110
4
1
AIN8
AINCOM
0111
4
1
Temperature sensor
1000
1
AINCOM
1001
0
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