Datasheet

AD9559 Data Sheet
Rev. C | Page 12 of 120
SERIAL PORT SPECIFICATIONS—I
2
C MODE
Table 15.
Parameter Min Typ Max Unit Test Conditions/Comments
SDA, SCL (AS INPUTS)
Input Logic 1 Voltage
0.7 × VDD3
V
Input Logic 0 Voltage 0.3 × VDD3 V
Input Current −10 +10 µA For V
IN
= 10% to 90% of VDD3
Hysteresis of Schmitt Trigger Inputs 0.015 × VDD3
Pulse Width of Spikes That Must Be Suppressed
by the Input Filter, t
SP
50 ns
SDA (AS OUTPUT)
Output Logic 0 Voltage 0.4 V I
O
= 3 mA
Output Fall Time from V
IHmin
to V
ILmax
20 + 0.1 C
b
1
250 ns 10 pF ≤ C
b
≤ 400 pF
TIMING
SCL Clock Rate 400 kHz
Bus-Free Time Between a Stop and Start
Condition, t
BUF
1.3 µs
Repeated Start Condition Setup Time, t
SU; STA
0.6 µs
Repeated Hold Time Start Condition, t
HD; STA
0.6 µs After this period, the first clock pulse is
generated
Stop Condition Setup Time, t
SU; STO
0.6 µs
Low Period of the SCL Clock, t
LOW
1.3 µs
High Period of the SCL Clock, t
HIGH
0.6 µs
SCL/SDA Rise Time, t
R 20 + 0.1 C
b
1
300 ns
SCL/SDA Fall Time, t
F
20 + 0.1 C
b
1
300 ns
Data Setup Time, t
SU; DAT
100 ns
Data Hold Time, t
HD; DAT
100
ns
Capacitive Load for Each Bus Line, C
b
1
400 pF
1
C
b
is the capacitance (pF) of a single bus line.
LOGIC INPUTS (
RESET
, M5 TO M0)
Table 16.
Parameter Min Typ Max Unit Test Conditions/Comments
RESET
PIN
Input High Voltage (V
IH
) 2.1 V
Input Low Voltage (V
IL
)
0.8
V
Input Current (I
INH
, I
INL
) ±85 ±125 µA
Input Capacitance (C
IN
) 3 pF
LOGIC INPUTS (M5 to M0) The M4 and M5 pins are dual function pins; the
values in this table apply when M4/SDO and
M5/
CS
are used as M pins; see Table 14 in the
Serial Port Specifications—SPI Mode section
for the specifications when these pins are used
as serial port pins (SDO,
CS
)
Input High Voltage (V
IH
)
2.5
V
Input Low Voltage (V
IL
) 0.6 V
Input Current (I
INH
, I
INL
) ±1 ±5 µA
Input Capacitance (C
IN
) 3 pF
LOGIC OUTPUTS (M5 TO M0)
Table 17.
Parameter Min Typ Max Unit Test Conditions/Comments
LOGIC OUTPUTS (M5 to M0)
Output High Voltage (V
OH
) VDD3 − 0.4 V I
OH
= 1 mA
Output Low Voltage (V
OL
) 0.4 V I
OL
= 1 mA