AD7872 Ver la hoja de datos (PDF) - Analog Devices
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AD7872 Datasheet PDF : 24 Pages
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Data Sheet
AD7871/AD7872
SPECIFICATIONS
VDD = +5 V ± 5%, VSS = −5 V ± 5%, AGND = DGND = 0 V, fCLK = 2 MHz external, fSAMPLE = 83 kHz, all specifications TMIN to TMAX; unless
otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE2
Signal-to-Noise Ratio3 (SNR) at
+25°C
TMIN to TMAX
Total Harmonic Distortion
(THD)
J, A
Versions1
80
80
−86
Peak Harmonic or Spurious Noise −86
Intermodulation Distortion (IMD)
Second-Order Terms
−86
Third-Order Terms
−86
Track/Hold Acquisition Time
DC ACCURACY
Resolution
Minimum Resolution for Which
No Missing Codes Are
Guaranteed
Integral Nonlinearity at +25°C
Integral Nonlinearity
Bipolar Zero Error
Positive Gain Error4
Negative Gain Error4
ANALOG INPUT
Input Voltage Range
Input Current
REFERENCE OUTPUT
REF OUT at +25°C
2
14
14
±12
±12
±12
±3
±500
2.99/3.01
TMIN to TMAX
2.98/3.02
REF OUT Tempco
Reference Load Sensitivity
±1.2
(ΔREF OUT/ΔI)
LOGIC INPUTS
Input High Voltage, VINH
2.4
Input Low Voltage, VINL
0.8
Input Current, IIN
±10
Input Current (14/8/CLK Input ±10
Only)
Input Capacitance, CIN5
10
K
B
Version1 Version1
80
79
80
79
−88
−85
−88
−85
−88
−85
−88
−85
2
2
14
14
14
14
±½
±½
±1
±1
±12
±12
±12
±12
±12
±12
±3
±500
±3
±500
2.99/3.01 2.99/3.01
2.98/3.02 2.98/3.02
±40
±40
±1.2
±1.2
2.4
2.4
0.8
0.8
±10
±10
±10
±10
10
10
T
Version1
77
77
−85
−85
−85
−85
2
14
14
±½
±1.3
±12
±12
±12
±3
±500
2.99/3.01
2.98/3.02
±40
±1.2
2.4
0.8
±10
±10
10
Unit
dB min
dB min
dB max
dB typ
dB max
dB typ
dB max
dB typ
dB max
dB typ
µs max
Bits
Bits
Test Conditions/Comments
VIN = 10 kHz sine wave
VIN = 10 kHz sine wave
VIN = 10 kHz
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE =
50 kHz
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE =
50 kHz
LSB typ
LSB max
LSB max
LSB max
LSB max
V
µA max
V min/V
max
V min/V
max
ppm/°C max
mV max
Typically 35 ppm
Reference load current change
(0 µA to 300 µA); reference load
should not be changed during
conversion
V min
V max
µA max
µA max
pF max
VDD = 5 V ±5%
VDD = 5 V ±5%
VIN = 0 V to VDD
VIN = VSS to VDD
Rev. E | Page 3 of 24
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