AD7982 Analog Devices, AD7982 Datasheet - Page 3

• Manufacturer Part Number: AD7982
• Manufacturer: Analog Devices

Specifications of AD7982

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOP

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