Datasheet

AD7476A/AD7477A/AD7478A
Rev. F | Page 7 of 28
Parameter A Grade
2
Unit Test Conditions/Comments
LOGIC INPUTS
Input High Voltage, V
INH
2.4 V min
1.8 V min V
DD
= 2.35 V
Input Low Voltage, V
INL
0.8 V max V
DD
= 5 V
0.4 V max V
DD
= 3 V
Input Current, I
IN
, SCLK Pin ±0.5 μA max Typically 10 nA, V
IN
= 0 V or V
DD
Input Current, I
IN
,
CS
Pin
±10 nA typ
Input Capacitance, C
IN
5
5 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DD
– 0.2 V min I
SOURCE
= 200 μA, V
DD
= 2.35 V to 5.25 V
Output Low Voltage, V
OL
0.4 V max I
SINK
= 200 μA
Floating-State Leakage Current ±1 μA max
Floating-State Output Capacitance
5
5 pF max
Output Coding Straight (Natural) Binary
CONVERSION RATE
Conversion Time 600 ns max 12 SCLK cycles with SCLK at 20 MHz
Track-and-Hold Acquisition Time
3
225 ns max
Throughput Rate 1.2 MSPS max
POWER REQUIREMENTS
V
DD
2.35/5.25 V min/max
I
DD
Digital I/Ps = 0 V or V
DD
Normal Mode (Static) 2.5 mA typ V
DD
= 4.75 V to 5.25 V, SCLK on or off
1.2 mA typ V
DD
= 2.35 V to 3.6 V, SCLK on or off
Normal Mode (Operational) 3.5 mA max V
DD
= 4.75 V to 5.25 V
1.7 mA max V
DD
= 2.35 V to 3.6 V
Full Power-Down Mode (Static) 1 μA max Typically 50 nA
Full Power-Down Mode (Dynamic) 0.6 mA typ V
DD
= 5 V, f
SAMPLE
= 100 kSPS
Power Dissipation
6
0.3 mA typ V
DD
= 3 V, f
SAMPLE
= 100 kSPS
Normal Mode (Operational) 17.5 mW max V
DD
= 5 V
5.1 mW max V
DD
= 3 V
Full Power-Down Mode 5 μW max V
DD
= 5 V
1
Temperature range is from –40°C to +85°C.
2
Operational from V
DD
= 2.0 V, with input high voltage (V
INH
) 1.8 V minimum.
3
See the Terminology section.
4
SC70 values guaranteed by characterization.
5
Guaranteed by characterization.
6
See the Power vs. Throughput Rate section.