Datasheet

Data Sheet AD7980
Rev. C | Page 3 of 28
SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, V
REF
= 5 V, T
A
= –40°C to +125°C, unless otherwise noted.
Table 2.
A Grade B Grade
Parameter Conditions Min Typ Max Min Typ Max Unit
RESOLUTION 16 16 Bits
ANALOG INPUT
Voltage Range IN+ − IN− 0 V
REF
0 V
REF
V
Absolute Input Voltage IN+ −0.1 V
REF
+ 0.1 −0.1 V
REF
+ 0.1 V
IN− −0.1 +0.1 −0.1 +0.1 V
Analog Input CMRR f
IN
= 100 kHz 60 60 dB
Leakage Current at 25°C Acquisition phase 1 1 nA
Input Impedance
See the
Analog Input section
See the
Analog Input section
ACCURACY
No Missing Codes
16
16
Bits
Differential Linearity Error REF = 5 V −1.0 ±0.5 +2.0 −0.9 ±0.4 +0.9 LSB
1
REF = 2.5 V ±0.7 ±0.55 LSB
1
Integral Linearity Error REF = 5 V −2.5 ±1.5 +2.5 −1.25 ±0.6 +1.25 LSB
1
REF = 2.5 V ±1.65 ±0.65 LSB
1
Transition Noise REF = 5 V 0.75 0.6 LSB
1
REF = 2.5 V 1.2 1.0 LSB
1
Gain Error, T
MIN
to T
MAX
2
±2 ±2 LSB
1
Gain Error Temperature Drift ±0.35 ±0.35 ppm/°C
Zero Error, T
MIN
to T
MAX
2
−1.0 ±0.08 +1.0 −0.5 ±0.08 +0.5 mV
Zero Temperature Drift 0.54 0.54 ppm/°C
Power Supply Sensitivity
VDD = 2.5 V
±
5%
±0.1
±0.1
LSB
1
THROUGHPUT
Conversion Rate
VIO ≥ 2.3 V up to 85°C, VIO ≥
3.3 V above 85°C up to 125°C
0
1
0
1
MSPS
Transient Response Full-scale step 290 290 ns
AC ACCURACY
Dynamic Range V
REF
= 5 V 91 92 dB
3
V
REF
= 2.5 V 86 87 dB
3
Oversampled Dynamic Range f
O
= 10 kSPS 110 111 dB
3
Signal-to-Noise Ratio, SNR f
IN
= 10 kHz, V
REF
= 5 V 90 90 91 dB
3
f
IN
= 10 kHz, V
REF
= 2.5 V 85.5 86.5 dB
3
Spurious-Free Dynamic Range, SFDR
f
IN
= 10 kHz
−103.5
−110
dB
3
Total Harmonic Distortion, THD f
IN
= 10 kHz −101 −114 dB
3
Signal-to-(Noise + Distortion), SINAD f
IN
= 10 kHz, V
REF
= 5 V 90.5 91.5 dB
3
f
IN
= 10 kHz, V
REF
= 2.5 V 86.0 87.0 dB
3
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 include full temperature range variation, but not 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.