Datasheet

(V
DD
= +5 V ⴞ 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 f
IN
= 100 kHz. f
SAMPLE
= 500 kSPS
Signal to (Noise + Distortion) Ratio
3
70 70 70 dB min
Total Harmonic Distortion
3
–78 –78 –78 dB max typ –84 dB
Peak Harmonic or Spurious Noise
3
–79 –79 –79 dB max
Intermodulation Distortion
3
fa = 49 kHz, fb = 50 kHz
2nd Order Terms –78 –78 –78 dB max typ –84 dB
3rd Order Terms –78 –78 –78 dB max typ –84 dB
AD7892-3 f
IN
= 100 kHz. f
SAMPLE
= 600 kSPS
Signal to (Noise + Distortion) Ratio
3
70 70 dB min
Total Harmonic Distortion
3
–78 –78 dB max
Peak Harmonic or Spurious Noise
3
–79 –79 dB max
Intermodulation Distortion
3
fa = 49 kHz, fb = 50 kHz
2nd Order Terms –78 –78 dB max
3rd Order Terms –78 –78 dB max
DC ACCURACY
Resolution 12 12 12 Bits
Minimum Resolution for Which No
Missing Codes Are Guaranteed 12 12 12 Bits
Relative Accuracy
3
± 1.5 ± 1 ± 1 LSB max
Differential Nonlinearity
3
± 1 ± 1 ± 1 LSB max
AD7892-1
Positive Full-Scale Error
3
± 4 ± 4 ± 5 LSB max
Negative Full-Scale Error
3
± 4 ± 4 ± 5 LSB max
Bipolar Zero Error
3
± 3 ± 2 ± 3 LSB max
AD7892-3
Positive Full-Scale Error
3
± 4 ± 4 LSB max
Negative Full-Scale Error
3
± 4 ± 4 LSB max
Bipolar Zero Error
3
± 4 ± 3 LSB max
AD7892-2
Positive Full-Scale Error
3
± 5 ± 5 ± 5 LSB max
Unipolar Offset Error
3
± 4 ± 3 ± 4 LSB max
ANALOG INPUT
AD7892-1
Input Voltage Range ± 10 ± 10 ± 10 Volts Input Applied to V
IN1
with V
IN2
Grounded
Input Voltage Range ± 5 ± 5 ± 5 Volts Input Applied to V
IN1
and V
IN2
Input Resistance 8 8 8 kΩ min Input Applied to V
IN1
with V
IN2
Grounded
AD7892-2
Input Voltage Range on V
IN1
0 to +2.5 0 to +2.5 0 to +2.5 Volts Input Applied to V
IN1
Input Current 10 10 50 nA max
Input Voltage Range on V
IN2
± 50 ± 50 ± 50 mV max
AD7892-3
Input Voltage Range on V
IN1
± 2.5 ± 2.5 Volts Input Applied to V
IN1
Input Resistance 2 2 kΩ min
REFERENCE OUTPUT/INPUT
REF IN Input Voltage Range 2.375/2.625 2.375/2.625 2.375/2.625 V min/V max 2.5 V ± 5%
Input Impedance 1.6 1.6 1.6 kΩ min Resistor Connected to Internal Reference Node
Input Capacitance
4
10 10 10 pF max
REF OUT Output Voltage 2.5 2.5 2.5 V nom
REF OUT Error @ +25°C ± 10 ± 10 ± 10 mV max
T
MIN
to T
MAX
± 20 ± 20 ± 25 mV max
REF OUT Temperature Coefficient 25 25 25 ppm/°C typ
REF OUT Output Impedance 5.5 5.5 5.5 kΩ nom
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
4
10 10 10 pF max
–2–
REV. C