AD7988-1 查看數據表（PDF） - Analog Devices
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AD7988-1 Datasheet PDF : 24 Pages
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Data Sheet
AD7988-1/AD7988-5
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
RESOLUTION
ANALOG INPUT
Voltage Range
Absolute Input Voltage
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 Sensitivity
THROUGHPUT
AD7988-1
Conversion Rate
Transient Response
AD7988-5
Conversion Rate
Transient Response
AC ACCURACY
Dynamic Range
Oversampled Dynamic Range
Signal-to-Noise Ratio, SNR
Spurious-Free Dynamic Range, SFDR
Total Harmonic Distortion, THD
Signal-to-(Noise + Distortion), SINAD
Test Conditions/Comments
IN+ − IN−
IN+
IN−
fIN = 1 kHz
Acquisition phase
VREF = 5 V
VREF = 2.5 V
VREF = 5 V
VREF = 2.5 V
VREF = 5 V
VREF = 2.5 V
VDD = 2.5 V ± 5%
VIO ≥ 2.3 V up to 85°C, VIO ≥ 3.3 V above 85°C up to
125°C
Full-scale step
VIO ≥ 2.3 V up to 85°C, VIO ≥ 3.3 V above 85°C up to
125°C
Full-scale step
VREF = 5 V
VREF = 2.5 V
fO = 10 kSPS
fIN = 10 kHz, VREF = 5 V
fIN = 10 kHz, VREF = 2.5 V
fIN = 10 kHz
fIN = 10 kHz
fIN = 10 kHz, VREF = 5 V
fIN = 10 kHz, VREF = 2.5 V
Min
Typ Max
16
0
VREF
−0.1
VREF + 0.1
−0.1
+0.1
60
1
See the Analog Inputs section
16
−0.9
−1.25
−0.5
±0.4
±0.55
±0.6
±0.65
0.6
1.0
±2
±0.35
±0.08
0.54
±0.1
+0.9
+1.25
+0.5
0
100
500
0
500
400
92
87
111
90
91
86.5
−110
−114
91.5
87.0
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.
Unit
Bits
V
V
V
dB
nA
Bits
LSB1
LSB1
LSB1
LSB1
LSB1
LSB1
LSB1
ppm/°C
mV
ppm/°C
LSB1
kSPS
ns
kSPS
ns
dB3
dB3
dB3
dB3
dB3
dB3
dB3
dB3
dB3
Rev. B | Page 3 of 24
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