AD7764 Analog Devices, AD7764 Datasheet - Page 4

• Manufacturer Part Number: AD7764
• Description: 24-Bit, 312 kSPS, 109 dB Sigma Delta ADC with On-Chip Buffers and Serial Interface
• Manufacturer: Analog Devices

Specifications of AD7764

• Resolution (bits): 24bit
• # Chan: 1
• Sample Rate: 40MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: 6.5 V p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

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