Datasheet

AD7890
Rev. C | Page 4 of 28
Parameter A Versions
1
B Versions S Version Unit Test Conditions/Comments
LOGIC INPUTS
Input High Voltage, V
INH
2.4 2.4 2.4 V min V
DD
= 5 V ± 5%
Input Low Voltage, V
INL
0.8 0.8 0.8 V max V
DD
= 5 V ± 5%
Input Current, I
IN
±10 ±10 ±10 μA max V
IN
= 0 V to V
DD
Input Capacitance, C
IN
5
10 10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
4.0 4.0 4.0 V min I
SOURCE
= 200 μA
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 1.6 mA
Serial Data Output Coding
AD7890-10 Twos Complement
AD7890-4 Straight (Natural) Binary
AD7890-2 Straight (Natural) Binary
CONVERSION RATE
Conversion Time 5.9 5.9 5.9 μs max f
CLK IN
= 2.5 MHz, MUX OUT, connected to
SHA IN
Track/Hold Acquisition Time
2, 5
2 2 2 μs max
POWER REQUIREMENTS
V
DD
5 5 5 V nom ± 5% for specified performance
I
DD
(Normal Mode) 10 10 10 mA max Logic inputs = 0 V or V
DD
I
DD
(Standby Mode)
6
@ 25°C 15 15 15 μA typ Logic inputs = 0 V or V
DD
Power Dissipation
Normal Mode 50 50 50 mW max Typically 30 mW
Standby Mode @ 25°C 75 75 75 μW typ
1
Temperature ranges are as follows: A, B Versions: −40°C to +85°C; S Version: −55°C to +125°C.
2
See the Terminology section.
3
This sample rate is only achievable when using the part in external clocking mode.
4
Full-scale error match applies to positive full scale for the AD7890-2 and AD7890-4. It applies to both positive and negative full scale for the AD7890-10.
5
Sample tested @ 25°C to ensure compliance.
6
Analog inputs on AD7890-10 must be at 0 V to achieve correct power-down current.