AD7890–SPECIFICATIONS
Parameter
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion) Ratio
2
Total Harmonic Distortion (THD)
2
Peak Harmonic or Spurious Noise
2
Intermodulation Distortion
2nd Order Terms
3rd Order Terms
Channel-to-Channel Isolation
2
DC ACCURACY
Resolution
Minimum Resolution for Which
No Missing Codes Are Guaranteed
Relative Accuracy
2
Differential Nonlinearity
2
Positive Full-Scale Error
2
Full-Scale Error Match
4
AD7890-2, AD7890-4
Unipolar Offset Error
2
Unipolar Offset Error Match
AD7890-10 Only
Negative Full-Scale Error
2
Bipolar Zero Error
2
Bipolar Zero Error Match
ANALOG INPUTS
AD7890-10
Input Voltage Range
Input Resistance
AD7890-4
Input Voltage Range
Input Resistance
AD7890-2
Input Voltage Range
Input Current
MUX OUT OUTPUT
Output Voltage Range
Output Resistance
(AD7890-10, AD7890-4)
(AD7890-2)
SHA IN INPUT
Input Voltage Range
Input Current
REFERENCE OUTPUT/INPUT
REF IN Input Voltage Range
Input Impedance
Input Capacitance
5
REF OUT Output Voltage
REF OUT Error @ +25°C
T
MIN
to T
MAX
REF OUT Temperature Coefficient
REF OUT Output Impedance
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN5
A Versions
1
70
–78
–79
–80
–80
–80
12
12
±
1
±
1
±
2.5
2
±
2
2
±
2
±
4
2
(V
DD
= +5 V, AGND = DGND = 0 V, REF IN = +2.5 V, f
CLK IN
= 2.5 MHz external,
MUX OUT connect to SHA IN. All specifications T
MIN
to T
MAX
unless otherwise noted.)
S Version
70
–78
–79
–80
–80
–80
12
12
±
1
±
1
±
2.5
2
±
2
2
±
2
±
4
2
Units
dB min
dB max
dB max
dB typ
dB typ
dB max
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Test Conditions/Comments
Using External
CONVST.
Any Channel
f
IN
= 10 kHz Sine Wave, f
SAMPLE
= 100 kHz
3
f
IN
= 10 kHz Sine Wave, f
SAMPLE
= 100 kHz
3
f
IN
= 10 kHz Sine Wave, f
SAMPLE
= 100 kHz
3
fa = 9 kHz, fb = 9.5 kHz, f
SAMPLE
= 100 kHz
3
B Versions
70
–78
–79
–80
–80
–80
12
12
±
0.5
±
1
±
2.5
2
±
2
2
±
2
±
4
2
f
IN
= 1 kHz Sine Wave
±
10
20
0 to +4.096
11
0 to +2.5
50
0 to +2.5
3/5
2
0 to +2.5
±
50
2.375/2.625
1.6
10
2.5
±
10
±
20
25
2
2.4
0.8
±
10
10
±
10
20
0 to +4.096
11
0 to +2.5
50
0 to +2.5
3/5
2
0 to +2.5
±
50
2.375/2.625
1.6
10
2.5
±
10
±
20
25
2
2.4
0.8
±
10
10
±
10
20
0 to +4.096
11
0 to +2.5
200
0 to +2.5
3/5
2
0 to +2.5
±
50
2.375/2.625
1.6
10
2.5
±
10
±
25
25
2
2.4
0.8
±
10
10
Volts
kΩ min
Volts
kΩ min
Volts
nA max
Volts
kΩ min/kΩ max
kΩ max
Volts
nA max
V min/V max
kΩ min
pF max
V nom
mV max
mV max
ppm/°C typ
kΩ nom
V min
V max
µA
max
pF max
2.5 V
±
5%
Resistor Connected to Internal Reference Node
Assuming V
IN
Is Driven from Low Impedance
V
DD
= 5 V
±
5%
V
DD
= 5 V
±
5%
V
IN
= 0 V to V
DD
–2–
REV. 0
AD [ ANALOG DEVICES ]
