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AD7764 数据表(PDF) 5 Page - Analog Devices

部件名 AD7764
功能描述  24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC
Download  33 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7764 数据表(HTML) 5 Page - Analog Devices

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AD7764
Rev. A | Page 4 of 32
Parameter
Test Conditions/Comments
Specification
Unit
Decimate 64×
Normal Power Mode
MCLK = 40 MHz, ODR = 312.5 kHz, f
IN = 1 kHz sine wave
Dynamic Range
Modulator inputs shorted
109
dB typ
105
dB min
Differential amplifier inputs shorted
107.3
dB typ
Signal-to-Noise Ratio (SNR)2
104
dB typ
102.7
dB min
Spurious-Free Dynamic Range (SFDR)
Nonharmonic
130
dBFS typ
Total Harmonic Distortion (THD)
Input amplitude = −0.5 dB
−105
dB typ
Input amplitude = −6 dB
−103
dB typ
Intermodulation Distortion (IMD)
Input amplitude = −6 dB, f
IN A = 100.3 kHz, fIN B = 97.3 kHz
Second-order terms
−118
dB
Third-order terms
−108
dB
Low Power Mode
Dynamic Range
Modulator inputs shorted
106
dB typ
105
dB min
Differential amplifier inputs shorted
105.3
Signal-to-Noise Ratio (SNR)2
Input amplitude = −0.5 dB
103
dB typ
102
dB min
Spurious-Free Dynamic Range (SFDR)
Nonharmonic
110
dBFS typ
Total Harmonic Distortion (THD)
Input amplitude = −0.5 dB
−105
dB typ
Input amplitude = −6 dB
−111
dB typ
−100
dB max
DC ACCURACY
Resolution
Guaranteed monotonic to 24 bits
24
Bits
Integral Nonlinearity
Normal power mode
0.0036
% typ
Low power mode
0.0014
% typ
Zero Error
Normal power mode
0.006
% typ
0.03
% max
Including on-chip amplifier
0.04
% typ
Low power mode
0.002
% typ
0.024
% max
Gain Error
0.018
% typ
Including on-chip amplifier
0.04
% typ
Zero Error Drift
0.00006
%FS/°C typ
Gain Error Drift
0.00005
%FS/°C typ
DIGITAL FILTER CHARACTERISTICS
Pass-Band Ripple
0.1
dB typ
Pass Band3
−1 dB frequency
ODR × 0.4016
kHz
−3 dB Bandwidth3
ODR × 0.4096
kHz
Stop Band3
Beginning of stop band
ODR × 0.5
kHz
Stop-Band Attenuation
Decimate 64× and decimate 128× modes
−120
dB typ
Decimate 256×
−115
dB typ
Group Delay
Decimate 64×
MCLK = 40 MHz
89
µs typ
Decimate 128×
MCLK = 40 MHz
177
µs typ
Decimate 256×
MCLK = 40 MHz
358
µs typ
ANALOG INPUT
Differential Input Voltage
Modulator input pins: V
IN+ − VIN−, VREF+ = 4.096 V
±3.2768
V p-p
Input Capacitance
At on-chip differential amplifier inputs
5
pF typ
At modulator inputs
29
pF typ


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