Cirrus Logic CS5374 - Manual (Page 2)

CS5374
CS5374
2
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. SPI TM 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