Datasheet

AD9218
Rev. C | Page 4 of 28
DIGITAL SPECIFICATIONS
V
DD
= 3.0 V, V
D
= 3.0 V; external reference, unless otherwise noted.
Table 2.
Test AD9218BST-40/-65 AD9218BST-80/-105
Parameter Temp Level Min Typ Max Min Typ Max Unit
DIGITAL INPUTS
Encode Input Common
Mode
Full V V
D
/2 V
D
/2 V
Encode 1 Voltage Full VI 2 2 V
Encode 0 Voltage Full VI 0.8 0.8 V
Encode Input Resistance Full VI 1.8 2.0 2.3 1.8 2.0 2.3 kΩ
Logic 1 Voltage—S1, S2,
DFS
Full VI 2 2 V
Logic 0 Voltage—S1, S2,
DFS
Full VI 0.8 0.8 V
Logic 1 Current—S1 Full VI –50 ±0 50 –50 ±0 50 μA
Logic 0 Current—S1 Full VI –400 –230 –50 –400 –230 –50 μA
Logic 1 Current—S2 Full VI 50 230 400 50 230 400 μA
Logic 0 Current—S2 Full VI –50 ±0 50 –50 ±0 50 μA
Logic 1 Current—DFS Full VI 30 100 200 30 100 200 μA
Logic 0 Current—DFS Full VI –400 –230 –50 –400 –230 –50 μA
Input Capacitance—S1,
S2, Encode Inputs
25°C V 2 2 pF
Input Capacitance DFS 25°C V 4.5 4.5 pF
DIGITAL OUTPUTS
Logic 1 Voltage Full VI 2.45 2.45 V
Logic 0 Voltage Full VI 0.05 0.05 V
Output Coding Twos complement or offset binary Twos complement or offset binary