Datasheet

–2–
AD7896–SPECIFICATIONS
(V
DD
= 2.7 V to 5.5 V, AGND = DGND = 0 V. All specifications T
MIN
to T
MAX
,
unless otherwise noted.)
Test Conditions/
Parameter A Version
1
B Version J Version S Version Unit Comments
DYNAMIC PERFORMANCE
2
Signal-to-(Noise + Distortion) Ratio
3
@ 25°C707070 typ 70 dB min f
IN
= 10 kHz Sine Wave,
f
SAMPLE
= 100 kHz
T
MIN
to T
MAX
70 dB min
Total Harmonic Distortion (THD)
3
– – –80 typ – dB max f
IN
= 10 kHz Sine Wave,
f
SAMPLE
= 100 kHz
Peak Harmonic or Spurious Noise
3
–80 –80 –80 typ dB max f
IN
= 10 kHz Sine Wave,
f
SAMPLE
= 100 kHz
Intermodulation Distortion (IMD)
3
fa = 9 kHz, fb = 9.5 kHz,
f
SAMPLE
= 100 kHz
Second Order Terms – – –80 typ – dB max
Third Order Terms –80 –80 –80 typ –80 dB max
DC ACCURACY
Resolution 12 12 12 12 Bits
Minimum Resolution for Which No
Missing Codes Are Guaranteed 12 12 12 12 Bits
Relative Accuracy
3
± 1 ± 1/2 ± 1 ± 1LSB max
Differential Nonlinearity
3
± 1 ± 1 ± 1 ± 1LSB max
Positive Full-Scale Error
3
± 3 ± 1.5 ±3 ±3LSB max
Unipolar Offset Error ± 4 ± 4 ± 5 ± 4LSB maxV
DD
= 5 V ± 10%
± 4 ± 3 ± 5 ± 4LSB maxV
DD
= 2.7 V to 3.6 V
ANALOG INPUT
Input Voltage Range 0 to +V
DD
0to+V
DD
0to+V
DD
0 to +V
DD
V
Input Current ± 2 ± 2 ± 2 ± 5 µA max
LOGIC INPUTS
Input High Voltage, V
INH
2.0 2.0 2.0 2.0 V min V
DD
= 2.7 V to 3.6 V
2.4 2.4 2.4 2.4 V
DD
= 5 V ± 10%
Input Low Voltage, V
INL
0.8 0.8 0.8 0.8 V max
Input Current, I
IN
± 10 ± 10 ±10 ± 10 µA max V
IN
= 0 V to V
DD
Input Capacitance, C
IN
4
10 10 10 10 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
2.4 2.4 2.4 2.4 V min I
SOURCE
= 400 ␮A
Output Low Voltage, V
OL
0.4 0.4 0.4 0.4 V max I
SINK
= 1.6 mA
Output Coding Straight (Natural) Binary
CONVERSION RATE
Conversion Time
Mode 1 Operation 8 8 8 8.5 µs max
Mode 2 Operation
5
14 14 14 14.5 µs max
Track-and-Hold Acquisition Time
3
1.5 1.5 1.5 1.5 µs max
Rev. D
77
77
77
77
77
77