
(V
DD
= +5 V 5%, AGND = DGND = 0 V, REF IN = +2.5 V. All specifications T
MIN
to T
MAX
unless otherwise noted.)
AD7892–SPECIFICATIONS
Parameter
A Versions
1
B Versions
S Version
2
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
AD7892-1, AD7892-2
Signal to (Noise + Distortion) Ratio
3
Total Harmonic Distortion
3
Peak Harmonic or Spurious Noise
3
Intermodulation Distortion
3
2nd Order Terms
3rd Order Terms
AD7892-3
Signal to (Noise + Distortion) Ratio
3
Total Harmonic Distortion
3
Peak Harmonic or Spurious Noise
3
Intermodulation Distortion
3
2nd Order Terms
3rd Order Terms
f
IN
= 100 kHz. f
SAMPLE
= 500 kSPS
70
–78
–79
70
–78
–79
70
–78
–79
dB min
dB max
dB max
typ –84 dB
fa = 49 kHz, fb = 50 kHz
typ –84 dB
typ –84 dB
f
IN
= 100 kHz. f
SAMPLE
= 600 kSPS
–78
–78
–78
–78
–78
–78
dB max
dB max
70
–78
–79
70
–78
–79
dB min
dB max
dB max
fa = 49 kHz, fb = 50 kHz
–78
–78
–78
–78
dB max
dB max
DC ACCURACY
Resolution
Minimum Resolution for Which No
Missing Codes Are Guaranteed
Relative Accuracy
3
Differential Nonlinearity
3
AD7892-1
Positive Full-Scale Error
3
Negative Full-Scale Error
3
Bipolar Zero Error
3
AD7892-3
Positive Full-Scale Error
3
Negative Full-Scale Error
3
Bipolar Zero Error
3
AD7892-2
Positive Full-Scale Error
3
Unipolar Offset Error
3
12
12
12
Bits
12
±
1.5
±
1
12
±
1
±
1
12
±
1
±
1
Bits
LSB max
LSB max
±
4
±
4
±
3
±
4
±
4
±
2
±
5
±
5
±
3
LSB max
LSB max
LSB max
±
4
±
4
±
4
±
4
±
4
±
3
LSB max
LSB max
LSB max
±
5
±
4
±
5
±
3
±
5
±
4
LSB max
LSB max
ANALOG INPUT
AD7892-1
Input Voltage Range
Input Voltage Range
Input Resistance
AD7892-2
Input Voltage Range on V
IN1
Input Current
Input Voltage Range on V
IN2
AD7892-3
Input Voltage Range on V
IN1
Input Resistance
±
10
±
5
8
±
10
±
5
8
±
10
±
5
8
Volts
Volts
k
min
Input Applied to V
IN1
with V
IN2
Grounded
Input Applied to V
IN1
and V
IN2
Input Applied to V
IN1
with V
IN2
Grounded
0 to +2.5
10
±
50
0 to +2.5
10
±
50
0 to +2.5
50
±
50
Volts
nA max
mV max
Input Applied to V
IN1
±
2.5
2
±
2.5
2
Volts
k
min
Input Applied to V
IN1
REFERENCE OUTPUT/INPUT
REF IN Input Voltage Range
Input Impedance
Input Capacitance
4
REF OUT Output Voltage
REF OUT Error @ +25
°
C
T
MIN
to T
MAX
REF OUT Temperature Coefficient
REF OUT Output Impedance
2.375/2.625
1.6
10
2.5
±
10
±
20
25
5.5
2.375/2.625
1.6
10
2.5
±
10
±
20
25
5.5
2.375/2.625
1.6
10
2.5
±
10
±
25
25
5.5
V min/V max
k
min
pF max
V nom
mV max
mV max
ppm/
°
C typ
k
nom
2.5 V
±
5%
Resistor Connected to Internal Reference Node
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
2.4
0.8
±
10
10
2.4
0.8
±
10
10
2.4
0.8
±
10
10
V min
V max
μ
A max
pF max
V
DD
= 5 V
±
5%
V
DD
= 5 V
±
5%
V
IN
= 0 V to V
DD
–2–
REV. C