Datasheet

AD7908/AD7918/AD7928
Rev. D | Page 6 of 32
Parameter B Version
1
Unit Test Conditions/Comments
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DRIVE
− 0.2 V min I
SOURCE
= 200 μA, AV
DD
= 2.7 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
3
10 pF max
Output Coding Straight (natural) binary Coding bit set to 1
Twos complement Coding bit set to 0
CONVERSION RATE
Conversion Time 800 ns max 16 SCLK cycles with SCLK at 20 MHz
Track-and-Hold Acquisition Time 300 ns max Sine wave input
300 ns max Full-scale step input
Throughput Rate 1 MSPS max See Serial Interface section
POWER REQUIREMENTS
AV
DD
2.7/5.25 V min/max
V
DRIVE
2.7/5.25 V min/max
I
DD
4
Digital inputs = 0 V or V
DRIVE
Normal Mode (Static) 600 μA typ AV
DD
= 2.7 V to 5.25 V, SCLK on or off
Normal Mode (Operational) 2.7 mA max AV
DD
= 4.75 V to 5.25 V, f
SCLK
= 20 MHz
2 mA max AV
DD
= 2.7 V to 3.6 V, f
SCLK
= 20 MHz
Using Auto Shutdown Mode 960 μA typ f
SAMPLE
= 250 kSPS
0.5 μA max (Static)
Full Shutdown Mode 0.5 μA max SCLK on or off (20 nA typ)
Power Dissipation
4
Normal Mode (Operational) 13.5 mW max AV
DD
= 5 V, f
SCLK
= 20 MHz
6 mW max AV
DD
= 3 V, f
SCLK
= 20 MHz
Auto Shutdown Mode (Static) 2.5 μW max AV
DD
= 5 V
1.5 μW max AV
DD
= 3 V
Full Shutdown Mode 2.5 μW max AV
DD
= 5 V
1.5 μW max AV
DD
= 3 V
1
Temperature ranges as follows: B version: –40°C to +85°C.
2
See Terminology section.
3
Sample tested @ 25°C to ensure compliance.
4
See Power vs. Throughput Rate section.