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參數(shù)資料
| 型號： | AD7709 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port |
| 中文描述： | 16位Σ-Δ型ADC電流源，可切換的基準(zhǔn)輸入和I / O端口 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 248K |
| 代理商： | AD7709 |
AD7709
–14–
REV. PrA J anuary 2001
PRELIMINARY TECHNICAL DATA
C ON F IG 23
C ON F IG 22 C ON F IG 21 C ON F IG 20
C ON F IG 19 C ON F IG 18
C ON F IG 17
C ON F IG 16
PSW1(0)
PSW2(0)
I3E N1 (0)
I3E N1(0)
I2E N1(0)
I2E N0(0)
I1E N1(0)
I1E N0(0)
C ON F IG 15
C ON F IG 14 C ON F IG 13 C ON F IG 12
C ON F IG 11 C ON F IG 10
C ON F IG 9
C ON F IG 8
P4DIG(0)
P3DIG(0)
P2E N(0)
P1E N(0)
P4DAT (0)
P3DAT (0)
P2DAT (0)
P1DAT (0)
C ON F IG 7
C ON F IG 6
C ON F IG 5
C ON F IG 4
C ON F IG 3
C ON F IG 2
C ON F IG 1
C ON F IG 0
RE F SE L (0)
C H2(0)
C H1(0)
C H0(0)
UNI(0)
RN2(0)
RN1(0)
RN0(0)
T able VI. Configuration Register Bit Designations
Bit
Bit
Location
Mnemonic
Description
C ON F IG 23
PSW 1
Power Switch 1 Control bit.
Set
by user to enable Power switch P1 to PWRGND.
Cleared
by user to enable use as a standard I/O pin.
When ADC is in standby mode the power switches are open.
C ON F IG 22
PSW 2
Power Switch 2 Control bit.
Set
by user to enable Power switch P2 to PWRGND.
Cleared
by user to enable use as a standard I/O pin.
When ADC is in standby mode the power switches are open.
C ON F IG 21
I3E N1
Current Source Enable Bits. Used in conjunction with bit I3EN0 to determine the function
of current source I3
C ON F IG 20
I3E N0
Current Source Enable Bits. Used in conjunction with bit I3EN1 to determine the function
of current source I3
I3E N1
I3E N0
Function
0
0
C urrent Source OFF
0
1
Current Source Routed to IOUT 1 pin.
1
0
Current Source Routed to IOUT 2 pin.
1
1
Current Source Routed to GND
C ON F IG 19
I2E N1
Current Source Enable Bits. Used in conjunction with bit I2EN0 to determine the function
of current source I2
C ON F IG 18
I2E N0
Current Source Enable Bits. Used in conjunction with bit I2EN1 to determine the function
of current source I2
I2E N1
I2E N0
Function
0
0
C urrent Source OFF
0
1
Current Source Routed to IOUT 1 pin.
1
0
Current Source Routed to IOUT 2 pin.
1
1
Current Source Routed to GND
C ON F IG 17
I1E N1
Current Source Enable Bits. Used in conjunction with bit I1EN0 to determine the function
of current source I3
C ON F IG 16
I1E N0
Current Source Enable Bits. Used in conjunction with bit I1EN1 to determine the function
of current source I3
I1E N1
I1E N0
Function
0
0
C urrent Source OFF
0
1
Current Source Routed to IOUT 1 pin.
1
0
Current Source Routed to IOUT 2 pin.
1
1
Current Source Routed to GND
C ON F IG 15
P4D IG
Digital Input Enable
Set
by user to enable P4 as a digital input
Cleared
by user to configure as pin P4/AIN4 as analog input.
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