AD7991 查看數據表（PDF） - Analog Devices
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AD7991 Datasheet PDF : 28 Pages
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AD7991/AD7995/AD7999
AD79991
The temperature range for the Y version is −40°C to +125°C. Unless otherwise noted, VDD = 2.7 V to 5.5 V, VREF = 2.5 V, fSCL = 3.4 MHz,
and TA = TMIN to TMAX.
Table 4.
Parameter
Min
DYNAMIC PERFORMANCE3, 4
A Version2
Typ Max
Signal-to-Noise and
49.5
Distortion (SINAD)5
Total Harmonic
−65
Distortion (THD)5
Peak Harmonic or
−65
Spurious Noise (SFDR)5
Intermodulation
Distortion (IMD)5
Second-Order Terms
Third-Order Terms
Channel-to-Channel
Isolation5
Full-Power Bandwidth5
DC ACCURACY3, 6
Resolution
8
Integral Nonlinearity5
Differential Nonlinearity5
Offset Error5
Offset Error Matching
Offset Temperature Drift
Gain Error5
Gain Error Matching
Gain Temperature Drift
ANALOG INPUT
Input Voltage Range
0
DC Leakage Current
Input Capacitance
REFERENCE INPUT
VREF Input Voltage Range 1.2
DC Leakage Current
VREF Input Capacitance
Input Impedance
−83
−75
−90
14
1.5
±0.04
±0.05
±0.3
±0.02
4.26
±0.06
±0.03
0.59
VREF
±1
34
4
35
5
VDD
±1
5
35
69
Y Version
Min Typ Max
49.5
−65
−65
−83
−75
−90
14
1.5
8
±0.1
±0.1
±0.35
±0.05
4.26
±0.175
±0.06
0.59
0
VREF
±1
34
4
35
5
1.2
VDD
±1
5
35
69
Unit
Test Conditions/Comments
See the Sample Delay and Bit Trial Delay section,
fIN = 10 kHz sine wave for fSCL from 1.7 MHz to 3.4 MHz
fIN = 1 kHz sine wave for fSCL up to 400 kHz
dB
dB
dB
fa = 11 kHz, fb = 9 kHz for fSCL from 1.7 MHz to
3.4 MHz
fa = 5.4 kHz, fb = 4.6 kHz for fSCL up to 400 kHz
dB
dB
dB
fIN = 10 kHz
MHz
@ 3 dB
MHz
@ 0.1 dB
Bits
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
ppm/°C
Guaranteed no missed codes to eight bits
V
VREF = VIN3/VREF or VDD
μA
pF
Channel 0 to Channel 2—during acquisition phase
pF
Channel 0 to Channel 2—outside acquisition phase
pF
Channel 3—during acquisition phase
pF
Channel 3—outside acquisition phase
V
μA
pF
Outside conversion phase
pF
During conversion phase
kΩ
Rev. A | Page 7 of 28
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