AD9286 Analog Devices, AD9286 Datasheet - Page 18

• Manufacturer Part Number: AD9286
• Description: 8-Bit, 500 MSPS, 1.8 V Analog-to-Digital Converter (ADC)
• Manufacturer: Analog Devices

Specifications of AD9286

• Resolution (bits): 8bit
• # Chan: 2
• Sample Rate: 500MSPS
• Interface: Par
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: 2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9286
The magnitude of the offset spur (OS) is shown in Equation 6.
where:
OFFSET is the channel-to-channel offset in codes.
RESOLUTION is the resolution of the converter (eight bits).
OS
OFFSET
OS
60
55
50
45
40
35
30
25
20
OFFSET
, as a function of offset mismatch, is shown in Figure 32.
0
Figure 32. OS
(dBFS) = 20 × log(OFFSET × 2/2
0.5
OFFSET
OFFSET MISMATCH (% FS)
as a Function of Offset Mismatch
1.0
1.5
RESOLUTION
2.0
)
2.5
Rev. A | Page 18 of 28
(6)
Due to the orthogonal relationship between the gain and timing
errors, it is impossible to correct for one with the other. To mini-
mize channel-to-channel gain error, the AD9286 is designed
to have very close gain matching between the two channels.
Address 0x37 and Address 0x38 of the SPI provide the ability to
add delay to either clock path to realize a minimum clock skew
error. Also provided via the SPI, in Address 0x10, is the ability
to minimize the channel-to-channel offset error.
DIGITAL OUTPUTS
Digital Output Enable Function ( OE )
The AD9286 has a flexible three-state ability for the digital output
pins. The three-state mode is enabled using the
is set to logic level high, the output drivers for both data buses
are placed into a high impedance state.
OE
pin. When
OE