AD7927 Analog Devices, AD7927 Datasheet - Page 18
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AD7927
Manufacturer Part Number
AD7927
Description
8-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP
Manufacturer
Analog Devices
Datasheet
1.AD7927.pdf
(28 pages)
Specifications of AD7927
Resolution (bits)
12bit
# Chan
8
Sample Rate
200kSPS
Interface
Ser,SPI
Analog Input Type
SE-Uni
Ain Range
Uni (Vref),Uni (Vref) x 2
Adc Architecture
SAR
Pkg Type
SOP
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AD7927
V
The AD7927 also has the V
age at which the serial interface operates. V
to easily interface to both 3 V and 5 V processors. For example,
if the AD7927 were operated with an AV
could be powered from a 3 V supply. The AD7927 has a larger
dynamic range with an AV
interface to 3 V processors. Take care to ensure V
exceed AV
Ratings section).
DRIVE
DD
by more than 0.3 V (see the Absolute Maximum
DD
DRIVE
of 5 V while still being able to
feature. V
DD
DRIVE
DRIVE
of 5 V, the V
controls the volt-
allows the ADC
DRIVE
does not
DRIVE
Rev. C | Page 18 of 28
pin
THE REFERENCE
An external reference source should be used to supply the
2.5 V reference to the AD7927. Errors in the reference source
result in gain errors in the AD7927 transfer function and add
to the specified full-scale errors of the part. A capacitor of at
least 0.1 μF should be placed on the REF
ence sources for the AD7927 include the AD780, REF192, and
the AD1582.
If 2.5 V is applied to the REF
be either 0 V to 2.5 V or 0 V to 5 V, depending on the setting of
the RANGE bit in the control register.
IN
pin, the analog input range can
IN
pin. Suitable refer-
Data Sheet