Datasheet

REV. B
–2–
AD7865–SPECIFICATIONS
(V
DD
= 5 V  5%, AGND = DGND = 0 V, V
REF
= Internal. Clock = Internal; all specifi-
cations T
MIN
to T
MAX
unless otherwise noted.)
Parameter A, Y Versions
1
B Version Unit Test Conditions/Comments
SAMPLE AND HOLD
–3 dB Full Power Bandwidth 3 3 MHz typ
Aperture Delay 20 20 ns max
Aperture Jitter 50 50 ps typ
Aperture Delay Matching 4 4 ns max
DYNAMIC PERFORMANCE
2
f
IN
= 100 kHz, f
S
= 350 kSPS
Signal to (Noise + Distortion) Ratio
3
@ 25°C
AD7865-1, AD7865-3 78 78 dB min Typically 80 dB
AD7865-2 77 77 dB min Typically 78 dB
T
MIN
to T
MAX
AD7865-1, AD7865-3 77 77 dB min
AD7865-2 76 76 dB min
Total Harmonic Distortion
3, 4
–86 –86 dB max
Peak Harmonic or Spurious Noise
3, 4
–86 –86 dB max
Intermodulation Distortion
3
fa = 49 kHz, fb = 50 kHz
2nd Order Terms –95 –95 dB typ
3rd Order Terms –95 –95 dB typ
Channel-to-Channel Isolation
3, 5
–88 –88 dB max f
IN
= 50 kHz Sine Wave
DC ACCURACY Any Channel
Resolution 14 14 Bits
Relative Accuracy (INL)
3
± 2 ± 1.5 LSB max Typically 0.6 LSBs
Differential Nonlinearity (DNL)
3
± 1 ± 1 LSB max No Missing Codes Guaranteed
AD7865-1
Positive Gain Error
3
± 10 ± 8 LSB max Typically ± 2 LSBs
Positive Gain Error Match
3
8 8 LSB max Typically 2 LSBs
Negative Gain Error
3
± 10 ± 8 LSB max Typically ± 2 LSBs
Negative Gain Error Match
3
8 8 LSB max Typically 2 LSBs
Bipolar Zero Error ± 12 ± 10 LSB max Typically ± 2 LSBs
Bipolar Zero Error Match 6 6 LSB max Typically 1.5 LSBs
AD7865-2
Positive Gain Error
3
± 16 ± 16 LSB max Typically ± 2 LSBs
Positive Gain Error Match
3
8 8 LSB max Typically 2 LSBs
Unipolar Offset Error
3
± 10 ± 10 LSB max Typically ± 2 LSBs
Unipolar Offset Error Match
3
10 10 LSB max Typically 2 LSBs
AD7865-3
Positive Gain Error
3
± 16 ± 14 LSB max Typically ± 6 LSBs
Positive Gain Error Match
3
8 8 LSB max Typically 2 LSBs
Negative Gain Error
3
± 16 ± 14 LSB max Typically ± 6 LSBs
Negative Gain Error Match
3
8 8 LSB max Typically 2 LSBs
Bipolar Zero Error ± 14 ± 12 LSB max Typically ± 5 LSBs
Bipolar Zero Error Match 8 6 LSB max Typically 2 LSBs
ANALOG INPUTS
AD7865-1
Input Voltage Range ± 5, ±10 ± 5, ±10 Volts
Input Current 1, 1 1, 1 mA max V
IN
= –5 V and –10 V Respectively,
Typically 0.7 mA
AD7865-2
Input Voltage Range 0 V to 2.5 V, 0 V to 2.5 V,
0 V to 5 V 0 V to 5 V Volts
Input Current 10 10 µA max V
IN
= 2.5 V, 0 V to 2.5 V Range, Typ 1 µA
1 1 mA max V
IN
= 5 V, 0 V to 5 V Range, Typ 0.7 mA
AD7865-3
Input Voltage Range ± 2.5 ±2.5 Volts
Input Current 1 1 mA max V
IN
= –2.5 V, Typically 0.7 mA