Datasheet
AD7764
Rev. A | Page 3 of 32
SPECIFICATIONS
AV
DD
1 = DV
DD
= 2.5 V, AV
DD
2 = AV
DD
3 = AV
DD
4 = 5 V, V
REF
+ = 4.096 V, MCLK amplitude = 5 V, T
A
= 25°C, normal power mode, using
the on-chip amplifier with components, as shown in the Optimal row in Table 7, unless otherwise noted.
1
Parameter
Table 2.
Test Conditions/Comments Specification Unit
DYNAMIC PERFORMANCE
Decimate 256×
Normal Power Mode MCLK = 40 MHz, ODR = 78.125 kHz, f
IN
= 1 kHz sine wave
Dynamic Range
Modulator inputs shorted 115 dB typ
110 dB min
Differential amplifier inputs shorted 113.4 dB typ
Signal-to-Noise Ratio (SNR)
2
Input amplitude = −0.5 dB 109 dB typ
106 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
Input amplitude = −60 dB −71 dB typ
Low Power Mode MCLK = 40 MHz, ODR = 78.125 kHz, f
IN
= 1 kHz sine wave
Dynamic Range Modulator inputs shorted 113 dB typ
110 dB min
Differential amplifier inputs shorted 112 dB typ
Signal-to-Noise Ratio (SNR)
2
Input amplitude = −0.5 dB 109 dB typ
106 dB min
Total Harmonic Distortion (THD) Input amplitude = −0.5 dB −105 dB typ
Input amplitude = −6 dB −111 dB typ
Input amplitude = −6 dB −100 dB max
Input amplitude = −60 dB −76 dB typ
Decimate 128×
Normal Power Mode MCLK = 40 MHz, ODR = 156.25 kHz, f
IN
= 1 kHz sine wave
Dynamic Range
Modulator inputs shorted 112 dB typ
108 dB min
Differential amplifier inputs shorted 110.4 dB typ
Signal-to-Noise Ratio (SNR)
2
107 dB typ
105 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 = 50.3 kHz, f
IN
B = 47.3 kHz
Second-order terms −117 dB typ
Third-order terms −108 dB typ
Low Power Mode MCLK = 40 MHz, ODR = 156.25 kHz, f
IN
= 1 kHz sine wave
Dynamic Range Modulator inputs shorted 110 dB typ
109 dB min
Differential amplifier inputs shorted 109 dB typ
Signal-to-Noise Ratio (SNR)
2
Input amplitude = −0.5 dB 107 dB typ
105 dB min
Total Harmonic Distortion (THD) Input amplitude = −0.5 dB −105 dB typ
Input amplitude = −6 dB −111 dB typ
Input amplitude = −6 dB −100 dB max
Intermodulation Distortion (IMD) Input amplitude = −6 dB, f
IN
A = 50.3 kHz, f
IN
B = 47.3 kHz
Second-order terms −134 dB typ
Third-order terms −110 dB typ