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CS5374 Datenblatt(PDF) 2 Page - Cirrus Logic |
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CS5374 Datenblatt(HTML) 2 Page - Cirrus Logic |
2 / 44 page CS5374 CS5374 DS862PP1 2 DS862PP1 TABLE OF CONTENTS 1. CHARACTERISTICS AND SPECIFICATIONS ....................................................................... 4 SPECIFIED OPERATING CONDITIONS ................................................................................ 4 ABSOLUTE MAXIMUM RATINGS .......................................................................................... 4 THERMAL CHARACTERISTICS ............................................................................................. 5 ANALOG CHARACTERISTICS ............................................................................................... 5 PERFORMANCE SPECIFICATIONS ...................................................................................... 7 CHANNEL PERFORMANCE PLOTS ...................................................................................... 9 DIGITAL CHARACTERISTICS .............................................................................................. 10 SPI™ INTERFACE TIMING (EXTERNAL MASTER) ............................................................ 12 POWER SUPPLY CHARACTERISTICS ............................................................................... 13 2. GENERAL DESCRIPTION..................................................................................................... 14 3. AMPLIFIER OPERATION ...................................................................................................... 16 3.1 Amplifier Inputs — INA, INB .......................................................................................... 16 3.1.1 Multiplexer Settings — MUX ............................................................................... 16 3.1.2 Gain Settings — GAIN ........................................................................................ 16 3.2 Amplifier Outputs — OUTR, OUTF ............................................................................... 16 3.2.1 Guard Output — GUARD .................................................................................... 16 3.3 Differential Signals ........................................................................................................ 17 4. MODULATOR OPERATION .................................................................................................. 18 4.1 Modulator Anti-Alias Filter ............................................................................................. 18 4.2 Modulator Inputs — INR, INF ........................................................................................ 19 4.2.1 Modulator Input Impedance ................................................................................ 19 4.2.2 Modulator Idle Tones — OFST ........................................................................... 19 4.3 Modulator Output — MDATA ........................................................................................ 19 4.3.1 Modulator One’s Density ..................................................................................... 19 4.3.2 Decimated 24-bit Output ..................................................................................... 19 4.4 Modulator Stability — MFLAG....................................................................................... 20 4.5 Modulator Clock Input — MCLK.................................................................................... 20 4.6 Modulator Synchronization — MSYNC ......................................................................... 20 5. SPITM SERIAL PORT............................................................................................................. 21 5.1 SPI Pin Descriptions ..................................................................................................... 21 5.2 SPI Serial Transactions................................................................................................. 21 5.3 SPI Registers ................................................................................................................23 5.3.1 VERSION — 0x00............................................................................................... 23 5.3.2 AMP1CFG — 0x01 ............................................................................................. 23 5.3.3 AMP2CFG — 0x02 ............................................................................................. 23 5.3.4 ADCCFG — 0x03................................................................................................ 24 5.3.5 PWRCFG — 0x04 ............................................................................................... 24 5.4 Example: CS5374 Configuration by an External SPI Master ........................................ 24 5.5 Example: CS5374 Configuration by the CS5376A SPI 2 Port ...................................... 25 5.5.1 CS5376A SPI 1 Transactions ............................................................................. 25 6. POWER MODES .................................................................................................................... 29 6.1 Normal Operation .......................................................................................................... 29 6.2 Power Down, MCLK Enabled........................................................................................ 29 6.3 Power Down, MCLK Disabled ....................................................................................... 29 7. VOLTAGE REFERENCE ....................................................................................................... 30 7.1 VREF Power Supply ..................................................................................................... 30 7.2 VREF RC Filter ............................................................................................................. 30 7.3 VREF PCB Routing ....................................................................................................... 30 7.4 VREF Input Impedance ................................................................................................. 30 7.5 VREF Accuracy ............................................................................................................. 31 8. POWER SUPPLIES .............................................................................................................. 32 8.1 Analog Power Supplies ................................................................................................. 32 8.2 Digital Power Supply ..................................................................................................... 32 8.3 Power Supply Bypassing .............................................................................................. 32 |
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