AD7927 Analog Devices, AD7927 Datasheet - Page 18

• Manufacturer Part Number: AD7927
• Description: 8-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP
• Manufacturer: Analog Devices

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

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