Datasheet

AD7864
Rev. D | Page 4 of 28
Parameter A Version
1
B Version Unit Test Conditions/Comments
AD7864-2
Input Voltage Range 0 to 2.5, 0 to 5 0 to 2.5, 0 to 5 V
Input Current (0 V to 2.5 V Option) ±100 ±100 nA max
Input Resistance (0 V to 5 V Option) 9 9 kΩ min
REFERENCE INPUT/OUTPUT
V
REF
In Input Voltage Range 2.375/2.625 2.375/2.625 V
MIN
/V
MAX
2.5 V ± 5%
V
REF
In Input Capacitance
4
10 10 pF max
V
REF
Out Output Voltage 2.5 2.5 V nom
V
REF
Out Error @ 25°C ±10 ±10 mV max
V
REF
Out Error T
MIN
to T
MAX
±20 ±20 mV max
V
REF
Out Temperature Coefficient 25 25 ppm/°C typ
V
REF
Out Output Impedance 6 6 kΩ typ See the Reference section
LOGIC INPUTS
Input High Voltage, V
INH
2.4 2.4 V min V
DD
= 5 V ± 5%
Input Low Voltage, V
INL
0.8 0.8 V max V
DD
= 5 V ± 5%
Input Current, I
IN
±10 ±10 μA max
Input Capacitance, C
IN
4
10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
4.0 4.0 V min I
SOURCE
= 400 μA
Output Low Voltage, V
OL
0.4 0.4 V max I
SINK
= 1.6 mA
DB11 to DB0
High Impedance
Leakage Current ±10 ±10 μA max
Capacitance
4
10 10 pF max
Output Coding
AD7864-1, AD7864-3 Twos complement
AD7864-2 Straight (natural) binary
CONVERSION RATE
Conversion Time 1.65 1.65 μs max For one channel
Track-And-Hold Acquisition Time
2, 3
0.35 0.35 μs max
Throughput Time 130 130 kSPS max For all four channels
POWER REQUIREMENTS
V
DD
5 5 V nom ±5% for specified performance
I
DD
5 μA typical, logic inputs = 0 V or V
DD
Normal Mode 24 24 mA max
Standby Mode 20 20 μA max Typically 4 μA
Power Dissipation
Normal Mode 120 120 mW max Typically 90 mW
Standby Mode 100 100 μW max Typically 20 μW
1
Temperature ranges are as follows: A, B versions: –40°C to +85°C. The A version is fully specified up to 105°C with a maximum sample rate of 450 kSPS and I
DD
maximum (normal mode) of 26 mA.
2
Performance is measured through the full channel (SHA and ADC).
3
See the Terminology section.
4
Sample tested at initial release to ensure compliance.