Datasheet

AD7991/AD7995/AD7999
Rev. B | Page 7 of 28
AD7999
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 4.
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
49.5 49.5 dB
Total Harmonic
Distortion (THD)
5
−65 −65 dB
Peak Harmonic or
Spurious Noise (SFDR)
5
−65 −65 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 −83 −83 dB
Third-Order Terms −75 −75 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 8 8 Bits
Integral Nonlinearity
5
±0.04 ±0.1 LSB
Differential Nonlinearity
5
±0.05 ±0.1 LSB Guaranteed no missed codes to eight bits
Offset Error
5
±0.3 ±0.5 LSB
Offset Error Matching ±0.02 ±0.05 LSB
Offset Temperature Drift 4.26 4.26 ppm/°C
Gain Error
5
±0.06 ±0.175 LSB
Gain Error Matching ±0.03 ±0.06 LSB
Gain Temperature Drift 0.59 0.59 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