Datasheet

AD7991/AD7995/AD7999
Rev. B | Page 5 of 28
AD7995
1
The temperature range for the Y version is −40°C to +125°C. Unless otherwise noted, V
DD
= 2.7 V to 5.5 V, V
REF
= 2.5 V, f
SCL
= 3.4 MHz,
and T
A
= T
MIN
to T
MAX
.
Table 3.
A Version
2
Y Version
Parameter Min Typ Max Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE
3, 4
See the
Sample Delay and Bit Trial Delay
section, f
IN
= 10 kHz sine wave for f
SCL
from
1.7 MHz to 3.4 MHz
f
IN
= 1 kHz sine wave for f
SCL
up to 400 kHz
Signal-to-Noise and
Distortion (SINAD)
5
61.5 61 dB
Total Harmonic Distortion
(THD)
5
−85 −75 dB
Peak Harmonic or Spurious
Noise (SFDR)
5
−85 −76 dB
Intermodulation
Distortion (IMD)
5
fa = 11 kHz, fb = 9 kHz for f
SCL
from 1.7 MHz to
3.4 MHz
fa = 5.4 kHz, fb = 4.6 kHz for f
SCL
up to 400 kHz
Second-Order Terms −90 −90 dB
Third-Order Terms −86 −86 dB
Channel-to-Channel
Isolation
5
−90 −90 dB f
IN
= 10 kHz
Full-Power Bandwidth
5
14 14 MHz @ 3 dB
1.5 1.5 MHz @ 0.1 dB
DC ACCURACY
3, 6
Resolution 10 10 Bits
Integral Nonlinearity
5
±0.4 ±0.4 LSB
Differential Nonlinearity
5
±0.4 ±0.4 LSB
Offset Error
5
±1 ±2.25 LSB
Guaranteed no missed codes to 10 bits
Offset Error Matching ±0.04 ±0.2 LSB
Offset Temperature Drift 4.13 4.13 ppm/°C
Gain Error
5
±0.15 ±0.5 LSB
Gain Error Matching ±0.06 ±0.25 LSB
Gain Temperature Drift 0.50 0.50 ppm/°C
ANALOG INPUT
Input Voltage Range 0 V
REF
0 V
REF
V V
REF
= V
IN3
/V
REF
or V
DD
DC Leakage Current ±1 ±1 μA
Input Capacitance 34 34 pF Channel 0 to Channel 2—during acquisition
phase
4 4 pF Channel 0 to Channel 2—outside acquisition
phase
35 35 pF Channel 3—during acquisition phase
5 5 pF Channel 3—outside acquisition phase
REFERENCE INPUT
V
REF
Input Voltage Range 1.2 V
DD
1.2 V
DD
V
DC Leakage Current ±1 ±1 μA
V
REF
Input Capacitance 5 5 pF Outside conversion phase
35 35 pF During conversion phase
Input Impedance 69 69 kΩ