Datasheet

AD7176-2 Data Sheet
Rev. A | Page 36 of 68
SINGLE CONVERSION MODE
In single conversion mode, the AD7176-2 performs a single
conversion and is placed in standby mode after the conversion
is complete. DOUT/
RDY
goes low to indicate the completion of a
conversion. When the data-word has been read from the data
register, DOUT/
RDY
goes high. The data register can be read
several times, if required, even when DOUT/
RDY
has gone high.
If several channels are enabled, the ADC automatically
sequences through the enabled channels and performs a
conversion on each channel. When a conversion is started,
DOUT/
RDY
goes high and remains high until a valid conversion
is available and
CS
is low. As soon as the conversion is available,
DOUT/
RDY
goes low. The ADC then selects the next channel and
begins a conversion. The user can read the present conversion
while the next conversion is being performed. As soon as the next
conversion is complete, the data register is updated; therefore,
the user has a limited period in which to read the conversion.
When the ADC has performed a single conversion on each of
the selected channels, it returns to standby mode.
If the DATA_STAT bit in the interface mode register is set to 1,
the contents of the status register, along with the conversion, are
output each time the data register is read. The two LSBs of the
status register indicate the channel to which the conversion
corresponds.
Figure 49. Single Conversion Mode
DIN
SCLK
DOUT/RDY
CS
0x01 0x44
DATA
0x8010
11037-073