參數(shù)資料
型號: EVAL-AD7730EB
廠商: Analog Devices, Inc.
英文描述: Bridge Transducer ADC
中文描述: 橋傳感器模數(shù)轉(zhuǎn)換器
文件頁數(shù): 12/52頁
文件大小: 497K
代理商: EVAL-AD7730EB
AD7730/AD7730L
–12–
REV. A
T able V. Summary of On-Chip Registers
Power-On/Reset
Default Value
Register Name
T ype
Size
Function
Communications
Register
Write Only
8 Bits
Not Applicable
All operations to other registers are initiated through
the Communications Register. T his controls whether
subsequent operations are read or write operations
and also selects the register for that subsequent
operation. Most subsequent operations return con-
trol to the Communications Register except for the
continuous read mode of operation.
Status Register
Read Only
8 Bits
CX Hex
Provides status information on conversions, calibra-
tions, settling to step inputs, standby operation and
the validity of the reference voltage.
Data Register
Read Only
16 Bits or 24 Bits
000000 Hex
Provides the most up-to-date conversion result from
the part. Register length can be programmed to be
16 bits or 24 bits.
Mode Register
Read/Write
16 Bits
01B0 Hex
Controls functions such as mode of operation, uni-
polar/bipolar operation, controlling the function of
AIN2(+)/D1 and AIN2(-)/D0, burnout current,
Data Register word length and disabling of MCLK
OUT . It also contains the reference selection bit, the
range selection bits and the channel selection bits.
Filter Register
Read/Write
24 Bits
200010 Hex
Controls the amount of averaging in the first stage
filter, selects the fast step and skip modes and con-
trols the ac excitation and chopping modes on the
part.
DAC Register
Read/Write
8 Bits
20 Hex
Provides control of the amount of correction per-
formed by the Offset/T ARE DAC.
Offset Register
Read/Write
24 Bits
800000 Hex
Contains a 24-bit word which is the offset calibration
coefficient for the part. T he contents of this register
are used to provide offset correction on the output
from the digital filter. T here are three Offset Regis-
ters on the part and these are associated with the
input channels as outlined in T able X III.
Gain Register
Read/Write
24 Bits
59AEE7 Hex
Contains a 24-bit word which is the gain calibration
coefficient for the part. T he contents of this register
are used to provide gain correction on the output
from the digital filter. T here are three Gain Registers
on the part and these are associated with the input
channels as outlined in T able X III.
T est Register
Read/Write
24 Bits
000000 Hex
Controls the test modes of the part which are used
when testing the part.
T he user is advised not to
change the contents of this register.
WEN
ZERO
RW1
RW0
ZERO
RS2
RS1
RS0
RDY
STDY
ST BY
NOREF
MS3
MS2
MS1
MS0
MD2
MD1
MD0
B
/U
DEN
D1
D0
WL
HIREF
ZERO
RN1
RN0
CLK DIS
BO
CH1
CH0
SF11 SF10
SF9
SF8
SF7
SF6
SF5
SF4
SF3
SF2
SF1
SF0
ZERO
ZERO
SK IP
FAST
ZERO ZERO
AC
CHP
DL3
DL2
DL1
DL0
ZERO
ZERO
DAC5
DAC4
DAC3
DAC2
DAC1
DAC0
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