Datasheet AD7765 (Analog Devices) - 4

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AD7765 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 7, unless otherwise noted
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Table 2. Parameter Test Conditions/Comments Specification Unit
DYNAMIC PERFORMANCE Decimate 256× Normal Power Mode MCLK = 40 MHz, ODR = 78.125 kHz, fIN = 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, fIN = 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, fIN = 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, fIN A = 50.3 kHz, fIN 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, fIN = 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, fIN A= 50.3 kHz, fIN B = 47.3 kHz Second-order terms −134 dB typ Third-order terms −110 dB typ Rev. A | Page 3 of 32 Document Outline Features Applications General Description Functional Block Diagram 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 AD7765 Antialias Protection AD7765 Input Structure On-Chip Differential Amplifier Modulator Input Structure Driving the Modulator Inputs Directly AD7765 Interface Reading Data Reading Status and Other Registers Writing to the AD7765 AD7765 Functionality Synchronization Overrange Alerts Power Modes Low Power Mode RESET/PWRDWN Mode Decimation Rate Pin Daisy Chaining Reading Data in Daisy-Chain Mode Writing Data in Daisy-Chain Mode Clocking the AD7765 MCLK Jitter Requirements Example 1 Example 2 Decoupling and Layout Information Supply Decoupling Reference Voltage Filtering Differential Amplifier Components Layout Considerations Using the AD7765 Bias Resistor Selection AD7765 Registers Control Register Status Register Gain Register—Address 0x0004 Non-Bit-Mapped, Default Value 0xA000 Overrange Register—Address 0x0005 Non-Bit-Mapped, Default Value 0xCCCC Outline Dimensions Ordering Guide