AD7687(RevC) Ver la hoja de datos (PDF) - Analog Devices
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AD7687 Datasheet PDF : 28 Pages
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Data Sheet
AD7687
SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range
Absolute Input Voltage
Common-Mode Input Range
Analog Input CMRR
Leakage Current at 25°C
Input Impedance
ACCURACY
No Missing Codes
Differential Linearity Error
Integral Linearity Error
Transition Noise
Gain Error2, TMIN to TMAX
Gain Error Temperature Drift
Offset Error2, TMIN to TMAX
Offset Temperature Drift
Power Supply Sensitivity
THROUGHPUT
Conversion Rate
Transient Response
AC ACCURACY
Dynamic Range
Signal-to-Noise
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise + Distortion)
Intermodulation Distortion4
Test Conditions/Comments
IN+ − IN−
IN+, IN−
IN+, IN−
fIN = 250 kHz
Acquisition phase
REF = VDD = 5 V
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
VDD = 5 V ± 5%
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
Full-scale step
VREF = 5 V
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 2.5 V
fIN = 20 kHz
fIN = 20 kHz
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 5 V, −60 dB input
fIN = 20 kHz, VREF = 2.5 V
Min Typ
Max
16
−VREF
+VREF
−0.1
VREF + 0.1
0
VREF/2
VREF/2 + 0.1
65
1
See the Analog Input section
16
−1
±0.4
+1
−1.5 ±0.4
+1.5
0.35
±2
±6
±0.3
±0.1
±1.6
±0.7
±3.5
±0.3
±0.05
0
250
0
200
1.8
95.8 96.5
94
95.5
92
92.5
−118
−118
94
95.5
36.5
92
92.5
115
Unit
Bits
V
V
V
dB
nA
Bits
LSB1
LSB
LSB
LSB
ppm/°C
mV
mV
ppm/°C
LSB
kSPS
kSPS
µs
dB3
dB
dB
dB
dB
dB
dB
dB
dB
1 LSB means least significant bit. With the ±5 V input range, one LSB is 152.6 µV.
2 See the Terminology section. These specifications do include full temperature range variation but do not include 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.
4 fIN1 = 21.4 kHz, fIN2 = 18.9 kHz, each tone at −7 dB below full-scale.
Rev. C | Page 3 of 28
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