AD7686
Rev. B | Page 3 of 28
SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2.
B Grade
C Grade
Parameter
Conditions
Min
Typ
Max
Min
Typ
Max
Unit
RESOLUTION
16
Bits
ANALOG INPUT
Voltage Range
IN+ IN
0
VREF
0
VREF
V
Absolute Input Voltage
IN+
0.1
VDD + 0.1
0.1
VDD + 0.1
V
IN
0.1
+0.1
0.1
+0.1
V
Analog Input CMRR
fIN = 200 kHz
65
dB
Leakage Current @ 25°C
Acquisition phase
1
nA
Input Impedance
section
section
ACCURACY
No Missing Codes
16
Bits
Differential Linearity Error
1
±0.7
1
±0.5
+1.5
Integral Linearity Error
3
±1
+3
2
±0.6
+2
Transition Noise
REF = VDD = 5 V
0.5
0.45
Gain Error2, TMIN to TMAX ±2
±8
±2
±6
Gain Error Temperature Drift
±0.3
ppm/°C
Offset Error2, TMIN to TMAX ±0.1
±1.6
±0.1
±1.6
mV
Offset Temperature Drift
±0.3
ppm/°C
Power Supply Sensitivity
VDD = 5 V
± 5%
±0.05
THROUGHPUT
Conversion Rate
0
500
0
500
kSPS
Transient Response
Full-scale step
400
ns
AC ACCURACY
Signal-to-Noise Ratio
fIN = 20 kHz, VREF = 5 V
89
92
91
92.7
fIN = 20 kHz, VREF = 2.5 V
87.5
88
Spurious-Free Dynamic Range
fIN = 20 kHz
106
110
Total Harmonic Distortion
fIN = 20 kHz
106
110
Signal-to-(Noise + Distortion)
fIN = 20 kHz, VREF = 5 V
89
92
91
92.5
fIN = 20 kHz, VREF = 5 V, 60 dB input
32
33.5
Intermodulation Distortion
4110
115
1 LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 μV.
2 See the Terminology section. These specifications do include full temperature range variation, but do not include the error contribution from the external reference. 3 All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
4 fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at 7 dB below full scale.