AD7691(Rev0) 데이터 시트보기 (PDF) - Analog Devices
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AD7691 Datasheet PDF : 28 Pages
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AD7691
SPECIFICATIONS
VDD = 2.3 V to 5.25 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range, VIN
Absolute Input Voltage
Common-Mode Input Range
Analog Input CMRR
Leakage Current at 25°C
Input Impedance1
THROUGHPUT
Conversion Rate
Transient Response
ACCURACY
No Missing Codes
Integral Linearity Error
Differential Linearity Error
Transition Noise
Gain Error3
Gain Error Temperature Drift
Zero Error3
Zero Temperature Drift
Power Supply Sensitivity
AC ACCURACY
Dynamic Range
Oversampled Dynamic Range5
Signal-to-Noise
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise + Distortion)
Intermodulation Distortion6
Conditions/Comments
IN+ − (IN−)
IN+, IN−
IN+, IN−
fIN = 250 kHz
Acquisition phase
Min
18
−VREF
−0.1
0
VDD = 4.5 V to 5.25 V
0
VDD = 2.3 V to 4.5 V
0
Full-scale step
18
−1.5
−1
REF = VDD = 5 V
VDD = 4.5 V to 5.25 V
−45
VDD = 2.3 V to 4.5 V
−80
VDD = 4.5 V to 5.25 V
−0.8
VDD = 2.3 V to 4.5 V
−3.5
VDD = 5 V ± 5%
VREF = 5 V
101
fIN = 1 kSPS
fIN = 1 kHz, VREF = 5 V
100
fIN = 1 kHz, VREF = 2.5 V
95
fIN = 1 kHz, VREF = 5 V
fIN = 1 kHz, VREF = 5 V
fIN = 1 kHz, VREF = 5 V
100
fIN = 1 kHz, VREF = 2.5 V
95
Typ
Max
VREF/2
65
1
+VREF
VREF + 0.1
VREF/2 + 0.1
250
180
1.8
±0.75
±0.5
0.75
±2
±2
±0.5
±0.1
±0.7
±1
±0.25
102
125
101.5
96.5
−125
−118
101.5
96.5
115
+1.5
+1.25
+45
+80
+0.8
+3.5
Unit
Bits
V
V
V
dB
nA
kSPS
kSPS
μs
Bits
LSB
LSB2
LSB
LSB
LSB
ppm/°C
mV
mV
ppm/°C
LSB
dB4
dB
dB
dB
dB
dB
dB
dB
dB
1 See the Analog Inputs section.
2 LSB means least significant bit. With the ±5 V input range, one LSB is 38.15 μV.
3 See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
4 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.
5 Dynamic range obtained by oversampling the ADC running at a throughput fS of 250 kSPS, followed by postdigital filtering with an output word rate fO.
6 fIN1 = 21.4 kHz and fIN2 = 18.9 kHz, with each tone at −7 dB below full scale.
Rev. 0 | Page 3 of 28
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