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参数资料
型号： AD7730LBRUZ-REEL7
厂商： Analog Devices Inc
文件页数： 14/53页
文件大小： 0K
描述： IC ADC TRANSDUCER BRIDGE 24TSSOP
标准包装： 1,000
位数： 24
通道数： 1
功率（瓦特）： 125mW
电压 - 电源，模拟： 4.75 V ~ 5.25 V
电压 - 电源，数字： 2.7 V ~ 5.25 V
封装/外壳： 24-TSSOP（0.173"，4.40mm 宽）
供应商设备封装： 24-TSSOP
包装： 带卷 (TR)
配用： EVAL-AD7730LEBZ-ND - BOARD EVALUATION FOR AD7730
EVAL-AD7730EBZ-ND - BOARD EVAL FOR AD7730
AD7730/AD7730L
–21–
READING FROM AND WRITING TO THE ON-CHIP REGISTERS
The AD7730 contains a total of thirteen on-chip registers. These registers are all accessed over a three-wire interface. As a result,
addressing of registers is via a write operation to the topmost register on the part, the Communications Register. Figure 5 shows a
flowchart for reading from the different registers on the part summarizing the sequence and the words to be written to access each of
the registers. Figure 6 gives a flowchart for writing to the different registers on the part, again summarizing the sequence and words
to be written to the AD7730.
Figure 5. Flowchart for Reading from the AD7730 Registers
Figure 6. Flowchart for Writing to the AD7730 Registers
Register
Byte Y (Hex)
Communications Register
00
Data Register
Read Only Register
Mode Register
02
Filter Register
03
DAC Register
04
Offset Register
05
Gain Register
06
Test Register
User is advised not to change
contents of Test Register.
Byte W
Byte Y
Byte Z
Register
(Hex)
Status Register
10
20
30
Data Register
11
21
30
Mode Register
12
22
30
Filter Register
13
N/A*
DAC Register
14
N/A*
Offset Register
15
N/A*
Gain Register
16
N/A*
Test Register
17
N/A*
*N/A= Not Applicable. Continuous reads of these registers does not make sense
as the register contents would remain the same since they are only changed by a
write operation.
START
WRITE
BYTE W TO
COMMUNICATIONS REGISTER
(SEE ACCOMPANYING TABLE)
YES
READ REGISTER
NO
WRITE
BYTE Y TO
COMMUNICATIONS REGISTER
(SEE ACCOMPANYING TABLE)
READ REGISTER
YES
NO
WRITE
BYTE Z TO
COMMUNICATIONS REGISTER
(SEE ACCOMPANYING TABLE)
STOP
CONTINUOUS
READ
OPERATION?
CONTINUOUS
READS OF
REGISTER
REQUIRED?
START
WRITE
BYTE Y TO
COMMUNICATIONS REGISTER
(SEE ACCOMPANYING TABLE)
WRITE TO REGISTER
END
REV. B
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