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AD7765 Datasheet(PDF) 3 Page - Analog Devices

Part # AD7765
Description  24-Bit, 156 kSPS,112dB ADC, With On-Chip Buffers, Serial Interface
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7765 Datasheet(HTML) 3 Page - Analog Devices

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Preliminary Technical Data
AD7765
Rev. PrC | Page 3 of 21
SPECIFICATIONS
VDD1 = 2.5 V, VDD2 = 5 V, VREF = 4.096 V, TA = +25°C, Using the on-chip amplifier with components as shown in Table 7, unless otherwise
noted.1
Table 1.
Parameter
Test Conditions/Comments
Specifcation
Unit
DYNAMIC PERFORMANCE
Decimate by 256
MCLK = 40MHz, ODR = 78.125kHz, FIN = 1kHz Sine Wave
TBD
dB min
Dynamic Range
Modulator inputs shorted
115
dB typ
Signal to Noise Ratio (SNR)2
112
dB typ
Spurious Free Dynamic Range (SFDR)
TBD
dBFS typ
Input Amplitude = -0.5dB
-105
dB typ
TBD
dB max
Input Amplitude = -6dB
dB typ
Total Harmonic Distortion (THD)
Input Amplitude = -60dB
dB typ
Decimate by 128
MCLK = 40MHz, ODR = 156.25kHz, FIN =100kHz Sine Wave
TBD
dB min
Dynamic Range
Modulator inputs shorted
112
dB typ
Signal to Noise Ratio (SNR)2
109
dB typ
Spurious Free Dynamic Range (SFDR)
Non-harmonic
dBFS typ
Input Amplitude = -0.5dB
dB typ
TBD
dB max
Total Harmonic Distortion (THD)
Input Amplitude = -6dB
dB typ
Intermodulation Distortion (IMD)
Input Amplitude = -6dB, FINA= TBD KHz, FINB=TBD KHz
TBD
dB typ
DC ACCURACY
Resolution
Guaranteed monotonic to 24 bits
24
Bits
Integral Nonlinearity
0.00076
LSB typ
0.014
% typ
Zero Error
0.02
% max
Gain Error
0.018
% typ
Zero Error Drift
0.00001
%FS/°C typ
Gain Error Drift
0.0002
%FS/°C typ
DIGITAL FILTER RESPONSE
Decimate by 256
Group Delay
MCLK = 40MHz
358
µS typ
Decimate by 128
Group Delay
MCLK = 40MHz
177
µS typ
ANALOG INPUT
Differential Input Voltage
Vin(+) – Vin(-), VREF = 2.5V
±2
V pk-pk
Vin(+) – Vin(-), VREF = 4.096V
±3.25
V pk-pk
Input Capacitance
At internal buffer inputs
5
pF typ
At modulator inputs
55
pF typ
REFERENCE INPUT/OUTPUT
VREF Input Voltage
VDD3 = 5V ± 5%
+4.096
Volts
VREF Input DC Leakage Current
±1
µA max
VREF Input Capacitance
5
pF max


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