參數(shù)資料
型號(hào)： EVAL-AD7329CBZ
廠商： Analog Devices Inc
文件頁數(shù)： 25/41頁
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7329CBZ
標(biāo)準(zhǔn)包裝： 1
系列： iCMOS®
ADC 的數(shù)量： 1
位數(shù)： 12
采樣率（每秒）： 1M
數(shù)據(jù)接口： 串行
輸入范圍： ±10 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 30mW @ 1MSPS
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7329
已供物品： 板
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AD7329
Data Sheet
Rev. B | Page 30 of 40
If a change to one of the range registers is required during a
sequence, it is necessary to first stop the sequence by writing to
the control register and setting SEQ1 to 0 and SEQ2 to 0. Next,
write to the range register to change the required range. The
previously selected sequence should then be initiated again by
writing to the control register and setting SEQ1 to 0 and SEQ2
to 1. The ADC converts the first channel in the sequence.
The AD7329 can be configured to convert a sequence of
consecutive channels (see Figure 49). This sequence begins by
converting on Channel 0 and ends with a final channel as
selected by Bit ADD2 to Bit ADD0 in the control register. In
this configuration, there is no need for a write to the sequence
register. To operate the AD7329 in this mode, set SEQ1 to 1 and
SEQ2 to 0 in the control register, and then select the final channel
in the sequence by programming Bit ADD2 to Bit ADD0 in the
control register.
After the control register is configured to operate the AD7329
in this mode, the DIN line can be held low or the write bit can
be set to 0. To return to traditional multichannel operation, a
write to the control register to set SEQ1 to 0 and SEQ2 to 0 is
necessary.
When SEQ1 and SEQ2 are both set to 0 or to 1, the AD7329 is
configured to operate in traditional multichannel mode, where
a write to Channel Address Bit ADD2 to Bit ADD0 in the control
register selects the next channel for conversion.
DIN: WRITE TO RANGE REGISTER 1 TO SELECT THE RANGE
FOR ANALOG INPUT CHANNELS.
DOUT: CONVERSION RESULT FROM CHANNEL 0, ±10V
RANGE, SINGLE-ENDED MODE.
CS
DIN: WRITE BIT = 0 OR DIN LINE HELD LOW TO CONTINUE
THROUGH SEQUENCE OF CONSECUTIVE CHANNELS.
DOUT: CONVERSION RESULT FROM CHANNEL 1,
RANGE SELECTED IN RANGE REGISTER 1.
CS
DIN: WRITE TO RANGE REGISTER 2 TO SELECT THE RANGE
FOR ANALOG INPUT CHANNELS.
DOUT: CONVERSION RESULT FROM CHANNEL 0,
RANGE SELECTED IN RANGE REGISTER 1,
SINGLE-ENDED MODE.
CS
DIN: WRITE BIT = 0 OR DIN LINE HELD LOW TO CONTINUE
TO CONVERT THROUGH THE SEQUENCE OF
CONSECUTIVE CHANNELS.
DOUT: CONVERSION RESULT FROM CHANNEL 0,
RANGE SELECTED IN RANGE REGISTER 1.
CS
DIN: WRITE TO CONTROL REGISTER TO SELECT THE FINAL
CHANNEL IN THE CONSECUTIVE SEQUENCE, SET SEQ1 = 1
AND SEQ2 = 0. SELECT OUTPUT CODING FOR SEQUENCE.
DOUT: CONVERSION RESULT FROM CHANNEL 0,
RANGE SELECTED IN RANGE REGISTER 1,
SINGLE-ENDED MODE.
CS
POWER ON.
DIN TIED LOW/WRITE BIT = 0.
CONTINUOUSLY CONVERT
ON CONSECUTIVE SEQUENCE
OF CHANNELS.
DIN: WRITE TO CONTROL
REGISTER TO STOP THE
SEQUENCE, SEQ1 = 0, SEQ2 = 0.
DOUT: CONVERSION RESULT
FROM CHANNEL IN SEQUENCE.
CS
STOP
A SEQUENCE.
05402-
045
Figure 49. Flowchart for Consecutive Sequence of Channels
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