AD7982BRMZ Datasheet, PDF (3/24 Pages) Analog Devices – 18-Bit, 1 MSPS PulSAR 7.0 mW

AD7982
SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, REF = 5 V, TA = −40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range
Absolute Input Voltage
Common-Mode Input Range
Analog Input CMRR
Leakage Current at 25°C
Input Impedance
ACCURACY
No Missing Codes
Differential Linearity Error
Integral Linearity Error
Transition Noise
Gain Error, TMIN to TMAX2
Gain Error Temperature Drift
Zero Error, TMIN to TMAX2
Zero Temperature Drift
Power Supply Rejection Ratio
THROUGHPUT
Conversion Rate
Transient Response
AC ACCURACY
Dynamic Range
Oversampled Dynamic Range⁴
Signal-to-Noise
Spurious-Free Dynamic Range
Total Harmonic Distortion⁵
Signal-to-(Noise + Distortion)
Conditions
IN+ − IN−
IN+, IN−
IN+, IN−
fIN = 450 kHz
Acquisition phase
REF = 5 V
VDD = 2.5 V ± 5%
Full-scale step
VREF = 5 V
VREF = 2.5 V
FO = 1 kSPS
fIN = 1 kHz, VREF = 5 V, TA = 25°C
fIN = 1 kHz, VREF = 2.5 V, TA = 25°C
fIN = 10 kHz
fIN = 10 kHz
fIN = 1 kHz, VREF = 5 V, TA = 25°C
Min
Typ
Max
18
−VREF
+VREF
−0.1
VREF + 0.1
VREF × 0.475
VREF × 0.5 VREF × 0.525
67
200
See the Analog Inputs section
18
−0.85
−2
−0.023
±0.5
±1
1.05
+0.004
±1
±100
0.5
90
+1.5
+2
+0.023
+700
0
1
290
97
99
93
129
95.5
98
92.5
−115
−120
97
Unit
Bits
V
V
V
dB
nA
Bits
LSB¹
LSB¹
LSB¹
% of FS
ppm/°C
μV
ppm/°C
dB
MSPS
ns
dB³
dB³
dB³
dB³
dB³
dB³
dB³
dB³
1 _{LSB means least significant bit. With the ±5 V input range, 1 LSB is 38.15 μV.}
2 _{See Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.}
3 _{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.}
4 _{Dynamic range is obtained by oversampling the ADC running at a throughput Fs of 1 MSPS followed by postdigital filtering with an output word rate of FO.}
5 _{Tested fully in production at fIN = 1 kHz.}
Rev. A | Page 3 of 24