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AD7764 Datasheet(PDF) 5 Page - Analog Devices |
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AD7764 Datasheet(HTML) 5 Page - Analog Devices |
5 / 32 page AD7764 Rev. 0 | Page 5 of 32 Parameter Test Conditions/Comments Specification Unit REFERENCE INPUT/OUTPUT VREF Input Voltage AVDD3 = 5 V ± 5% 4.096 V VREF Input DC Leakage Current ±1 μA max VREF Input Capacitance 5 pF typ DIGITAL INPUT/OUTPUT MCLK Input Amplitude 2.25 to 5.25 V Input Capacitance 7.3 pF typ Input Leakage Current ±1 μA/pin max VINH 0.8 × DVDD V min VINL 0.2 × DVDD V max VOH4 2.2 V min VOL 0.1 V max ON-CHIP DIFFERENTIAL AMPLIFIER Input Impedance >1 MΩ Bandwidth for 0.1 dB Flatness 125 kHz Common-Mode Input Voltage Voltage range at input pins: VINA+ and VINA− −0.5 to +2.2 V Common-Mode Output Voltage On-chip differential amplifier pins: VOUT+ and VOUT− 2.048 V POWER REQUIREMENTS AVDD1 (Modulator Supply) ±5% 2.5 V AVDD2 (General Supply) ±5% 5 V AVDD3 (Differential Amplifier Supply) ±5% 5 V min/max AVDD4 (Ref Buffer Supply) ±5% 5 V min/max DVDD ±5% 2.5 V Normal Power Mode AIDD1 (Modulator) 19 mA typ AIDD2 (General)5 MCLK = 40 MHz 13 mA typ AIDD3 (Differential Amplifier) AVDD3 = 5 V 10 mA typ AIDD4 (Reference Buffer) AVDD4 = 5 V 9 mA typ DIDD5 MCLK = 40 MHz 37 mA typ Low Power Mode AIDD1 (Modulator) 10 mA typ AIDD2 (General) 5 MCLK = 40 MHz 7 mA typ AIDD3 (Differential Amplifier) AVDD3 = 5 V 5.5 mA typ AIDD4 (Reference Buffer) AVDD4 = 5 V 5 mA typ DIDD5 MCLK = 40 MHz 20 mA typ POWER DISSIPATION Normal Power Mode 300 mW typ MCLK = 40 MHz, decimate 64× 371 mW max Low Power Mode MCLK = 40 MHz, decimate 64× 160 mW typ 215 mW max Power-Down Mode6 PWRDWN held logic low 1 mW typ 1 See Terminology section. 2 SNR specifications in decibels are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified. 3 Output Data Rate (ODR) = [(MCLK/2)]/Decimation Rate. That is, the maximum ODR for AD7764 = [(40 MHz)/2)/64] = 312.5 kHz. 4 Tested with a 400 μA load current. 5 Tested at MCLK = 40 MHz. This current scales linearly with MCLK frequency applied. 6 Tested at 125°C. |
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