Datasheet

REV. A
–2–
AD7899–SPECIFICATIONS
(V
DD
= 5 V ⴞ 5%, AGND = DGND = 0 V, V
REF
= Internal. Clock = Internal, all specifications
T
MIN
to T
MAX
and valid for V
DRIVE
= 3 V ⴞ 5% and 5 V ⴞ 5% unless otherwise noted.)
ABS
Parameter Version
1
Version
1
Version
1
Unit Test Conditions/Comments
SAMPLE AND HOLD
–0.1 dB Full Power Bandwidth 500 500 500 kHz typ
–3 dB Full Power Bandwidth 4.5 4.5 4.5 MHz typ
Aperture Delay 20 20 20 ns max
Aperture Jitter 25 25 25 ps typ
DYNAMIC PERFORMANCE
2
f
IN
= 100 kHz, f
S
= 400 kSPS
AD7899-1
Signal to (Noise + Distortion)
Ratio
3
@ 25C 78 78 78 dB min
T
MIN
to T
MAX
78 78 77 dB min
Total Harmonic Distortion
3
–84 –84 –82 dB max
Peak Harmonic or Spurious Noise
3
–86 –86 –85 dB max
AD7899-2
Signal to (Noise + Distortion)
Ratio
3
@ 25C 78 dB min
T
MIN
to T
MAX
77 dB min
Total Harmonic Distortion
3
–82 dB max
Peak Harmonic or Spurious Noise
3
–82 dB max
AD7899-3
Signal to (Noise + Distortion)
Ratio
3
@ 25C 78 78 dB min
T
MIN
to T
MAX
77 77 dB min
Total Harmonic Distortion
3
–84 –84 dB max
Peak Harmonic or Spurious Noise
3
–86 –86 dB max
Intermodulation Distortion
3
fa = 49 kHz, fb = 50 kHz
2nd Order Terms –89 –89 –89 dB typ
3rd Order Terms –89 –89 –89 dB typ
DC ACCURACY
Resolution 14 14 14 Bits
Relative Accuracy (INL)
3
± 2 ± 1.5 ± 2 LSB max
Differential Nonlinearity (DNL)
3
± 1 ± 1 ± 1 LSB max No Missing Codes Guaranteed
AD7899-1
Input Voltage Range ± 5, ± 10 ± 5, ± 10 Volts
Input Current 0.8, 0.8 0.8, 0.8 mA max V
IN
= –5 V and –10 V Respectively
Positive Gain Error
3
± 10 ± 8 ± 12 LSB max
Negative Gain Error
3
± 10 ± 8 ± 12 LSB max
Bipolar Zero Error ± 12 ± 8 ± 12 LSB max
AD7899-2
Input Voltage Range 0 to 2.5 Volts
0 to 5
Input Current 0.4, 800 µA max V
IN
= 2.5 V, V
IN
= 5 V
Positive Gain Error
3
± 14 LSB max
Offset Error
3
± 10 LSB max
AD7899-3
Input Voltage Range ± 2.5 ± 2.5 Volts
Input Current 0.8 0.8 mA max V
IN
= –2.5 V
Positive Gain Error
3
± 14 ± 12 LSB max
Negative Gain Error
3
± 14 ± 12 LSB max
Bipolar Zero Error ± 14 ± 12 LSB max
REFERENCE INPUT/OUTPUT
V
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%
V
REF
IN Input Capacitance
4
10 10 10 pF max
V
REF
OUT Output Voltage 2.5 2.5 2.5 V nom
V
REF
OUT Error @ 25C ± 10 ± 10 ± 10 mV max
V
REF
OUT Error T
MIN
to T
MAX
± 20 ± 20 ± 25 mV max
V
REF
OUT Temperature Coefficient 25 25 25 ppm/C typ
V
REF
OUT Output Impedance 6 6 6 kΩ typ See Reference Section