EVAL-AD7944EBZ データシートの表示（PDF） - Analog Devices
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EVAL-AD7944EBZ Datasheet PDF : 28 Pages
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AD7944
SPECIFICATIONS
AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, VREF = 4.096 V, TA = −40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range
Absolute Input Voltage
Leakage Current at 25°C
Input Impedance
ACCURACY
No Missing Codes
Differential Nonlinearity Error, DNL
Integral Nonlinearity Error, INL
Transition Noise
Gain Error2
Gain Error Temperature Drift
Zero Error2
Zero Error Temperature Drift
Power Supply Sensitivity3
THROUGHPUT
Conversion Rate
Transient Response
AC ACCURACY3
Dynamic Range
Signal-to-Noise Ratio, SNR
Spurious-Free Dynamic Range, SFDR
Total Harmonic Distortion, THD4
Signal-to-Noise-and-Distortion Ratio,
SINAD
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Aperture Delay
Test Conditions/Comments
Min
14
Typ
Max
(IN+) − (IN−)
IN+
IN−
Acquisition phase
0
VREF
−0.1
VREF + 0.1
−0.1
+0.1
250
See the Analog Inputs section
TMIN to TMAX
TMIN to TMAX
AVDD = 2.5 V ± 5%
14
−0.90
−1.00
−15
−0.65
±0.25
±0.25
0.9
±2
±0.8
±0.08
0.55
84.3
+0.90
+1.00
+15
+0.65
0
2.5
Full-scale step
100
VREF = 4.096 V, internal reference 83.5
VREF = 5.0 V, external reference
84
fIN = 20 kHz
VREF = 4.096 V, internal reference 83.5
VREF = 5.0 V, external reference
84
fIN = 20 kHz
fIN = 20 kHz, VREF = 4.096 V, internal
reference
fIN = 20 kHz, VREF = 4.096 V
84.5
85
84
84.5
103
−102
84
19
0.7
Unit
Bits
V
V
V
nA
Bits
LSB1
LSB1
LSB1
LSB1
ppm/°C
mV
ppm/°C
dB
MSPS
ns
dB
dB
dB
dB
dB
dB
dB
MHz
ns
1 LSB means least significant bit. With the ±4.096 V input range, one LSB is 250 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 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 Tested fully in production at fIN = 1 kHz.
Rev. 0 | Page 3 of 28
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