Datasheet

AD7693
Rev. A | Page 3 of 24
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, V
REF
= VDD, all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter Conditions/Comments Min Typ Max Unit
RESOLUTION 16 Bits
ANALOG INPUT
Voltage Range IN+ − (IN−) −V
REF
+V
REF
V
Absolute Input Voltage IN+, IN− −0.1 V
REF
+ 0.1 V
Common-Mode Input Range IN+, IN− V
REF
/2 – 0.1 V
REF
/2 V
REF
/2 + 0.1 V
Analog Input CMRR f
IN
= 250 kHz 65 dB
Leakage Current at 25°C Acquisition phase 1 nA
Input Impedance
1
THROUGHPUT
Conversion Rate 0 500 kSPS
Transient Response Full-scale step 400 ns
ACCURACY
No Missing Codes 16 Bits
Integral Linearity Error −0.5 ±0.25 +0.5 LSB
2
Differential Linearity Error −0.5 ±0.25 +0.5 LSB
Transition Noise REF = VDD = 5 V 0.35 LSB
Gain Error
3
−20 ±0.5 +20 LSB
Gain Error Temperature Drift ±0.3 ppm/°C
Zero Error
3
−5 ±0.5 +5 LSB
Zero Temperature Drift ±0.3 ppm/°C
Power Supply Sensitivity
VDD = 5 V ± 5%
±1 ppm
AC ACCURACY
4
Dynamic Range 96 96.5 dB
5
Signal-to-Noise f
IN
= 1 kHz 95.5 96 dB
f
IN
= 10 kHz 95.5 dB
f
IN
= 100 kHz 93 dB
f
IN
= 1 kHz, V
REF
= 2.5 V 93 dB
Signal-to-(Noise + Distortion) f
IN
= 1 kHz 95.5 96 dB
f
IN
= 10 kHz 95.5 dB
f
IN
= 100 kHz 90 dB
Total Harmonic Distortion f
IN
= 1 kHz −120 −108 dB
f
IN
= 10 kHz −113 dB
f
IN
= 100 kHz −92 dB
Spurious-Free Dynamic Range f
IN
= 1 kHz 120 dB
f
IN
= 10 kHz 114 dB
f
IN
= 100 kHz 93.5 dB
Intermodulation Distortion
6
115 dB
1
See the Analog Inputs section.
2
LSB means least significant bit. With the ±5 V input range, one LSB is 152.6 μV.
3
See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
4
With V
REF
= 5 V, unless otherwise noted.
5
All specifications expressed in decibels are referred to a full-scale input FSR and tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
6
f
IN1
= 21.4 kHz and f
IN2
= 18.9 kHz, with each tone at −7 dB below full scale.