Datasheet

REV. A
–3–
AD7899
ABS
Parameter Version
1
Version
1
Version
1
Unit Test Conditions/Comments
L OGIC INPUTS
Input High Voltage, V
INH
V
DRIVE
/2 + 0.4 V
DRIVE
/2 + 0.4 V
DRIVE
/2 + 0.4 V min V
DD
= 5 V ± 5%
Input Low Voltage, V
INL
V
DRIVE
/2 – 0.4 V
DRIVE
/2 – 0.4 V
DRIVE
/2 – 0.4 V max V
DD
= 5 V ± 5%
Input Current, I
IN
± 10 ± 10 ± 10 µA max
Input Capacitance, C
IN
4
10 10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
V
DRIVE
– 0.4 V
DRIVE
– 0.4 V
DRIVE
– 0.4 V min I
SOURCE
= 400 µA
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 1.6 mA
DB13–DB0
High Impedance
Leakage Current ± 10 ± 10 ± 10 µA max
Capacitance
4
10 10 10 pF max
Output Coding
AD7899-1, AD7899-3 Two’s Complement
AD7899-2 Straight (Natural) Binary
CONVERSION RATE
Conversion Time 2.2 2.2 2.2 µs max
Track/Hold Acquisition Time
2, 3
0.3 0.3 0.3 µs max
Throughput Time 400 400 400 kSPS max
POWER REQUIREMENTS
V
DD
5 5 5 V nom
I
DD
Normal Mode 25 25 25 mA max Typically 16 mA
Standby Mode 20 20 20 µA max (5 µA typ) Logic Inputs = 0 V or
V
DD
Power Dissipation
Normal Mode 125 125 125 mW max Typically 80 mW, V
DD
= 5 V
Standby Mode 100 100 125 µW max
NOTES
1
Temperature Ranges are as follows : A, B Versions: –40C to +85C. S Version: –55°C to +125°C.
2
Performance measured through full channel (SHA and ADC).
3
See Terminology.
4
Sample tested @ 25°C to ensure compliance.
Specifications subject to change without notice.