AD7265 Analog Devices, AD7265 Datasheet - Page 8

• Manufacturer Part Number: AD7265
• Description: Differential/Single-Ended Input, Dual 1 MSPS, 12-Bit, 3-Channel SAR A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7265

• Resolution (bits): 12bit
• # Chan: 12
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7265
Pin No.
28, 30
31
32
Mnemonic
D
V
DV
DRIVE
OUT
DD
B, D
OUT
A
Description
Serial Data Outputs. The data output is supplied to each pin as a serial data stream. The bits are clocked out on
the falling edge of the SCLK input and 14 SCLKs are required to access the data. The data simultaneously appears
on both pins from the simultaneous conversions of both ADCs. The data stream consists of two leading zeros
followed by the 12 bits of conversion data. The data is provided MSB first. If CS is held low for 16 SCLK cycles
rather than 14, then two trailing zeros appear after the 12 bits of data. If CS is held low for a further 16 SCLK
cycles on either D
simultaneous conversion on both ADCs to be gathered in serial format on either D
serial port. See the Serial Interface section.
Logic Power Supply Input. The voltage supplied at this pin determines at what voltage the interface operates.
This pin should be decoupled to DGND. The voltage at this pin may be different than that at AV
should never exceed either by more than 0.3 V.
Digital Supply Voltage, 2.7 V to 5.25 V. This is the supply voltage for all digital circuitry on the AD7265. The DV
and AV
transient basis. This supply should be decoupled to DGND.
DD
voltages should ideally be at the same potential and must not be more than 0.3 V apart even on a
OUT
A or D
OUT
B, the data from the other ADC follows on the D
Rev. A | Page 8 of 28
OUT
pin. This allows data from a
OUT
A or D
OUT
B using only one
DD
and DV
DD
but
DD