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AD7988-1_1208 Datasheet(PDF) 3 Page - Analog Devices

Part No. AD7988-1_1208
Description  16-Bit Lower Power PulSAR ADCs in MSOP/LFCSP (QFN)
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7988-1_1208 Datasheet(HTML) 3 Page - Analog Devices

 
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Data Sheet
AD7988-1/AD7988-5
Rev. C | Page 3 of 24
SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, VREF = 5 V, TA = –40°C to +125°C, unless otherwise noted.
Table 2.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
RESOLUTION
16
Bits
ANALOG INPUT
Voltage Range
IN+ − IN−
0
V
REF
V
Absolute Input Voltage
IN+
−0.1
V
REF + 0.1
V
IN−
−0.1
+0.1
V
Analog Input CMRR
f
IN = 1 kHz
60
dB
Leakage Current at 25°C
Acquisition phase
1
nA
Input Impedance
See the Analog Inputs section
ACCURACY
No Missing Codes
16
Bits
Differential Linearity Error
V
REF = 5 V
−0.9
±0.4
+0.9
LSB1
V
REF = 2.5 V
±0.55
LSB1
Integral Linearity Error
V
REF = 5 V
−1.25
±0.6
+1.25
LSB1
V
REF = 2.5 V
±0.65
LSB1
Transition Noise
V
REF = 5 V
0.6
LSB1
V
REF = 2.5 V
1.0
LSB1
Gain Error, T
MIN to TMAX
2
±2
LSB1
Gain Error Temperature Drift
±0.35
ppm/°C
Zero Error, T
MIN to TMAX
2
−0.5
±0.08
+0.5
mV
Zero Temperature Drift
0.54
ppm/°C
Power Supply Sensitivity
VDD = 2.5 V ± 5%
±0.1
LSB1
THROUGHPUT
AD7988-1
Conversion Rate
VIO ≥ 2.3 V up to 85°C, VIO ≥ 3.3 V above 85°C up to
125°C
0
100
kSPS
Transient Response
Full-scale step
500
ns
AD7988-5
Conversion Rate
VIO ≥ 2.3 V up to 85°C, VIO ≥ 3.3 V above 85°C up to
125°C
0
500
kSPS
Transient Response
Full-scale step
400
ns
AC ACCURACY
Dynamic Range
V
REF = 5 V
92
dB3
V
REF = 2.5 V
87
dB3
Oversampled Dynamic Range
f
O = 10 kSPS
111
dB3
Signal-to-Noise Ratio, SNR
f
IN = 10 kHz, VREF = 5 V
90
91
dB3
f
IN = 10 kHz, VREF = 2.5 V
86.5
dB3
Spurious-Free Dynamic Range, SFDR
f
IN = 10 kHz
−110
dB3
Total Harmonic Distortion, THD
f
IN = 10 kHz
−114
dB3
Signal-to-(Noise + Distortion), SINAD
f
IN = 10 kHz, VREF = 5 V
91.5
dB3
f
IN = 10 kHz, VREF = 2.5 V
87.0
dB3
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.


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