Datasheet AD7764 (Analog Devices) - 4

link to page 22 link to page 6 link to page 6 link to page 6 link to page 6
Data Sheet AD7764 SPECIFICATIONS
AVDD1 = DVDD = 2.5 V, AVDD2 = AVDD3 = AVDD4 = 5 V, VREF+ = 4.096 V, MCLK amplitude = 5 V, TA = 25°C, normal power mode, using the on-chip amplifier with components, as shown in the Optimal row in Table 10, unless otherwise noted
.
1
Table 2. Parameter Test Conditions/Comments Min Typ Max Unit
DYNAMIC PERFORMANCE Decimate 256× Normal Power Mode MCLK = 40 MHz, output data rate (ODR) = 78.125 kHz, fIN = 1 kHz sine wave Dynamic Range Modulator inputs shorted 110 115 dB Differential amplifier inputs shorted 113.4 dB Signal-to-Noise Ratio (SNR)2 Input amplitude = −0.5 dB 106 109 dB Spurious-Free Dynamic Range Nonharmonic 130 dBFS (SFDR) Total Harmonic Distortion (THD) Input amplitude = −0.5 dB −105 dB Input amplitude = −6 dB −103 dB Input amplitude = −60 dB −71 dB Low Power Mode MCLK = 40 MHz, ODR = 78.125 kHz, fIN = 1 kHz sine wave Dynamic Range Modulator inputs shorted 110 113 dB Differential amplifier inputs shorted 112 dB SNR2 Input amplitude = −0.5 dB 106 109 dB THD Input amplitude = −0.5 dB −105 dB Input amplitude = −6 dB −111 −100 dB Input amplitude = −60 dB −76 dB Decimate 128× Normal Power Mode MCLK = 40 MHz, ODR = 156.25 kHz, fIN = 1 kHz sine wave Dynamic Range Modulator inputs shorted 108 112 dB Differential amplifier inputs shorted 110.4 dB SNR2 105 107 dB SFDR Nonharmonic 130 dBFS THD Input amplitude = −0.5 dB −105 dB Input amplitude = −6 dB −103 dB Intermodulation Distortion (IMD) Input amplitude = −6 dB, fIN A = 50.3 kHz, fIN B = 47.3 kHz Second-order terms −117 dB Third-order terms −108 dB Low Power Mode MCLK = 40 MHz, ODR = 156.25 kHz, fIN = 1 kHz sine wave Dynamic Range Modulator inputs shorted 109 110 dB Differential amplifier inputs shorted 109 dB SNR2 Input amplitude = −0.5 dB 105 107 dB THD Input amplitude = −0.5 dB −105 dB Input amplitude = −6 dB −111 dB Input amplitude = −6 dB −100 dB IMD Input amplitude = −6 dB, fIN A = 50.3 kHz, fIN B = 47.3 kHz Second-order terms −134 dB Third-order terms −110 dB Rev. B | Page 3 of 33 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION Σ-Δ MODULATION AND DIGITAL FILTERING AD7764 ANTIALIAS PROTECTION INPUT STRUCTURE ON-CHIP DIFFERENTIAL AMPLIFIER MODULATOR INPUT STRUCTURE DRIVING THE MODULATOR INPUTS DIRECTLY AD7764 SERIAL INTERFACE READING DATA READING STATUS AND OTHER REGISTERS WRITING TO THE AD7764 FUNCTIONALITY SYNCHRONIZATION OVERRANGE ALERTS POWER MODES Low Power Mode RESETB/PWRDWNB Mode DECIMATION RATE PIN DAISY-CHAINING READING DATA IN DAISY-CHAIN MODE WRITING DATA IN DAISY-CHAIN MODE CLOCKING THE AD7764 MCLK JITTER REQUIREMENTS Example 1 Example 2 DECOUPLING AND LAYOUT INFORMATION SUPPLY DECOUPLING REFERENCE VOLTAGE FILTERING DIFFERENTIAL AMPLIFIER COMPONENTS LAYOUT CONSIDERATIONS USING THE AD7764 BIAS RESISTOR SELECTION AD7764 REGISTERS CONTROL REGISTER STATUS REGISTER GAIN REGISTER—ADDRESS 0x0004 Nonbit Mapped, Default Value: 0xA000 OVERRANGE REGISTER—ADDRESS 0x0005 Nonbit Mapped, Default Value: 0xCCCC OUTLINE DIMENSIONS ORDERING GUIDE