Datasheet

AD9518-4 Data Sheet
Rev. B | Page 10 of 64
SERIAL CONTROL PORT
Table 13.
Parameter Min Typ Max Unit Test Conditions/Comments
CS (INPUT) CS has an internal 30 kΩ pull-up resistor
Input Logic 1 Voltage 2.0 V
Input Logic 0 Voltage 0.8 V
Input Logic 1 Current 3 μA
Input Logic 0 Current 110 μA
Input Capacitance 2 pF
SCLK (INPUT) SCLK has an internal 30 kΩ pull-down resistor
Input Logic 1 Voltage 2.0 V
Input Logic 0 Voltage 0.8 V
Input Logic 1 Current 110 μA
Input Logic 0 Current 1 μA
Input Capacitance 2 pF
SDIO (WHEN INPUT)
Input Logic 1 Voltage 2.0 V
Input Logic 0 Voltage 0.8 V
Input Logic 1 Current 10 nA
Input Logic 0 Current 20 nA
Input Capacitance 2 pF
SDIO, SDO (OUTPUTS)
Output Logic 1 Voltage 2.7 V
Output Logic 0 Voltage 0.4 V
TIMING
Clock Rate (SCLK, 1/t
SCLK
) 25 MHz
Pulse Width High, t
HIGH
16 ns
Pulse Width Low, t
LOW
16 ns
SDIO to SCLK Setup, t
DS
2 ns
SCLK to SDIO Hold, t
DH
1.1 ns
SCLK to Valid SDIO and SDO, t
DV
8 ns
CS to SCLK Setup and Hold, t
S
, t
H
2 ns
CS Minimum Pulse Width High, t
PWH
3 ns
PD, SYNC, AND RESET PINS
Table 14.
Parameter Min Typ Max Unit Test Conditions/Comments
INPUT CHARACTERISTICS
These pins each have a 30 kΩ internal pull-up
resistor
Logic 1 Voltage 2.0 V
Logic 0 Voltage 0.8 V
Logic 1 Current 1 μA
Logic 0 Current 110 μA
Capacitance 2 pF
RESET TIMING
Pulse Width Low 50 ns
SYNC TIMING
Pulse Width Low 1.5
High speed
clock cycles
High speed clock is CLK input signal