Datasheet

AD7863
Rev. B | Page 3 of 24
SPECIFICATIONS
V
DD
= 5 V ± 5%, AGND = DGND = 0 V, REF = Internal. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter A Version
1
B Version
1
Unit Test Conditions/Comments
SAMPLE AND HOLD
−3 dB Small Signal Bandwidth 7 7 MHz typ
Aperture Delay
2
35 35 ns max
Aperture Jitter
2
50 50 ps typ
Aperture Delay Matching
2
350 350 ps max
DYNAMIC PERFORMANCE
3
f
IN
= 80.0 kHz, f
S
= 175 kSPS
Signal-to-(Noise + Distortion) Ratio
4
@ 25°C 78 78 dB min
T
MIN
to T
MAX
77 77 dB min
Total Harmonic Distortion
4
−82 −82 dB max −87 dB typ
Peak Harmonic or Spurious Noise
4
−82 −82 dB max −90 dB typ
Intermodulation Distortion
4
fa = 49 kHz, fb = 50 kHz
Second Order Terms −93 −93 dB typ
Third Order Terms −89 −89 dB typ
Channel-to-Channel Isolation
4
−86 −86 dB typ f
IN
= 50 kHz sine wave
DC ACCURACY Any channel
Resolution 14 14 Bits
Minimum Resolution for Which No
Missing Codes are Guaranteed 14 14 Bits
Relative Accuracy
4
±2.5 ±2 LSB max
Differential Nonlinearity
4
+2 to −1 +2 to −1 LSB max
AD7863-10, AD7863-3
Positive Gain Error
4
±10 ±8 LSB max
Positive Gain Error Match
4
10 10 LSB max
Negative Gain Error
4
±10 ±8 LSB max
Negative Gain Error Match
4
10 10 LSB max
Bipolar Zero Error ±10 ±8 LSB max
Bipolar Zero Error Match 8 6 LSB max
AD7863-2
Positive Gain Error
4
±14 LSB max
Positive Gain Error Match
4
16 LSB max
Unipolar Offset Error ±14 LSB max
Unipolar Offset Error Match 10 LSB max
ANALOG INPUTS
AD7863-10
Input Voltage Range ±10 ±10 V
Input Resistance 9 9 kΩ typ
AD7863-3
Input Voltage Range ±2.5 ±2.5 V
Input Resistance 3 3 kΩ typ
AD7863-2
Input Voltage Range 2.5 2.5 V
Input Current 100 100 nA max