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AD7763 Arkusz danych(PDF) 4 Page - Analog Devices

Numer części AD7763
Szczegółowy opis  Sigma-Delta ADC with On-Chip Buffers, Serial Interface
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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AD7763 Arkusz danych(HTML) 4 Page - Analog Devices

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Data Sheet
AD7763
Rev. B | Page 3 of 32
SPECIFICATIONS
AVDD1 = DVDD = VDRIVE = 2.5 V; AVDD2 = AVDD3 = AVDD4 = 5 V; VREF = 4.096 V; MCLK amplitude = 5 V; TA = 25°C; normal mode,
using on-chip amplifier with components as shown in Table 10, unless otherwise noted.1
Table 2.
Parameter
Test Conditions/Comments
Specification
Unit
DYNAMIC PERFORMANCE
Decimate × 256
MCLK = 40 MHz, ODR = 78 kHz, FIN = 1 kHz
Dynamic Range
Modulator inputs shorted
119
120.5
dB min
dB typ
Signal-to-Noise Ratio (SNR)2
Input amplitude = −0.5 dBFS
112
dB typ
Input amplitude = −60 dB
59
dBc typ
Spurious-Free Dynamic Range (SFDR)
Nonharmonic, input amplitude = −6 dB
126
dBc typ
Input amplitude = −60 dB
77
dBc typ
Total Harmonic Distortion (THD)
Input amplitude = −0.5 dBFS
−105
dB typ
Input amplitude = −6 dB
−106
dBc typ
Input amplitude = −60 dB
−75
dBc typ
Decimate × 64
MCLK = 40 MHz, ODR = 312.5 kHz, FIN = 1 kHz
Dynamic Range
Modulator inputs shorted
112
113
dB min
dB typ
Signal-to-Noise Ratio (SNR)2
Input amplitude = −0.5 dBFS
109.5
dB typ
Spurious-Free Dynamic Range (SFDR)
Nonharmonic, input amplitude = −6 dB
126
dBc typ
Decimate × 32
MCLK = 40 MHz, ODR = 625 kHz, FIN = 100 kHz
Dynamic Range
Modulator inputs shorted
108
109.5
dB min
dB typ
Signal-to-Noise Ratio (SNR)2
Input amplitude = −0.5 dBFS
107
dB typ
Spurious-Free Dynamic Range (SFDR)
Total Harmonic Distortion (THD)
Nonharmonic, input amplitude = −6 dB
120
dBc typ
Input amplitude = −0.5 dBFS
−105
dB typ
Input amplitude = −6 dB
−107
dBc typ
DC ACCURACY
Resolution
24
Bits
Differential Nonlinearity
Guaranteed monotonic to 24 bits
Integral Nonlinearity
0.00076
% typ
Zero Error
0.014
% typ
0.02
% max
Gain Error
0.018
% typ
Zero Error Drift
10
μ%FS/°C typ
Gain Error Drift
0.0002
%FS/°C typ
DIGITAL FILTER RESPONSE
Decimate × 32
Group Delay
MCLK = 40 MHz
47
µs typ
Decimate × 64
Group Delay
MCLK = 40 MHz
91.5
µs typ
Decimate × 256
Group Delay
MCLK = 40 MHz
358
µs typ
ANALOG INPUT
Differential Input Voltage
VIN(+) – VIN(−), VREF = 2.5 V
±2
V p-p
VIN(+) – Vin(−), VREF = 4.096 V
±3.25
V p-p
Input Capacitance
At internal buffer inputs
5
pF typ
At modulator inputs
55
pF typ


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