參數(shù)資料
型號(hào): AD7708
廠商: Analog Devices, Inc.
英文描述: 8-/10-Channel, Low Voltage, Low Power, ADCs
中文描述: 8-/10-Channel,低電壓,低功耗,ADC的
文件頁(yè)數(shù): 23/44頁(yè)
文件大?。?/td> 339K
代理商: AD7708
REV. 0
AD7708/AD7718
–23–
Table XI. Registers—Quick Reference Guide
Power-On/Reset
Default Value
Register Name
Type
Size
Function
Communications
Write Only
8 Bits
Not Applicable
All operations to other registers are initiated through
the Communications Register. This controls whether
subsequent operations are read or write operations
and also selects the register for that subsequent
operation.
Status Register
Read Only
8 Bits
00 Hex
Provides status information on conversions, calibra-
tions and error conditions.
Mode Register
Read/Write
8 Bits
00 Hex
Controls functions such as mode of operation, chan-
nel configuration, oscillator operation in power-down.
ADC (ADCCON)
Control Register
Read/Write
8 Bits
07 Hex
This register is used to select the active channel
input, configure the operating input range, and select
unipolar or bipolar operation.
I/O (IOCON)
I/O Control Register
Read/Write
8 Bits
00 Hex
This register is used to control and configure the
I/O port.
Filter Register
Read/Write
8 Bits
45 Hex
This register determines the amount of averaging
performed by the sinc filter and consequently deter-
mines the data update rate of the AD7708/AD7718.
The filter register determines the update rate for
operation with CHOP enabled and CHOP disabled.
AD7718 ADC (DATA)
Data Register
Read Only
24 Bits
000000 Hex
Provides the most up-to-date conversion result for
the selected channel on the AD7718.
AD7708 (DATA)
Data Register
Read Only
16 Bits
0000 Hex
Provides the most up-to-date conversion result for
the selected channel on the AD7708.
B
S
M
B
S
L
Y
D
R
0
L
A
C
0
R
R
E
0
0
K
C
O
L
B
S
M
B
S
L
3
H
C
2
H
C
1
H
C
0
H
C
/
U
B
2
N
R
1
N
R
0
N
R
B
S
M
B
S
L
7
F
S
6
F
S
5
F
S
4
F
S
3
F
S
2
F
S
1
F
S
0
F
S
B
S
M
B
S
L
0
0
R
I
D
2
P
R
I
D
1
P
0
0
T
A
D
2
P
T
A
D
1
P
CR7
CR6
CR5
CR4
CR3
CR2
CR1
CR0
WEN
R/
W
0(0)
0(0)
A3(0)
A2(0)
A1(0)
A0(0)
MSB
LSB
CHOP
NEGBUF REFSEL CHCON OSCPD
MD2
MD1
MD0
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