Datasheet AK5704 (Asahi Kasei Microdevices) - 10

link to page 10 link to page 10 [AK5704]
8. Electrical Characteristics 8.1. Microphone & ADC Analog Characteristics (AVDD=3.3V: AVDDL bit = “0”)
(Ta = 25C; AVDD = 3.3V, TVDD = 1.8 V; VSS1 = VSS2 = 0 V; Signal Frequency = 1 kHz; 24-bit Data; fs = 48 kHz, BCLK = 64fs; Measurement Bandwidth = 20 Hz to 20 kHz; unless otherwise specified)
Parameter Min. Typ. Max. Unit MIC Amplifier 1/2:
AIN1A+/-, AIN1B+/-, AIN2A+/-, AIN2B+/- pins Input Resistance 140 200 260 k MIC-Amp 1/2 Gain Gain Setting 0 - +30 dB Step Width 2 3 4 dB
MIC Power Supply:
MPWR1/2 pins MICL[1:0] bits = “00” 2.6 2.8 3.0 MICL[1:0] bits = “01” 2.3 2.5 2.7 Output Voltage (Note 10) V MICL[1:0] bits = “10” 1.7 1.8 1.9 MICL[1:0] bits = “11” - AVDD - Load Resistance 650 - - Load Capacitance - - 130 pF MICL[1:0] bits = “00” - 111 - Output Noise Level MICL[1:0] bits = “01” - 112 - dBV (A-weighted) MICL[1:0] bits = “10” - 116 - PSRR (1kHz) (Note 11) - 60 - dB Note 10. Output voltage setting of microphone power for MPWR1 and MPWR2 is common. The output voltage is proportional to AVDD. MICL[1:0] bits = “00”: Typ. 2.8 x AVDD/3.3V, “01”: Typ. 2.5 x AVDD/3.3V, “10”: Typ. 1.8 x AVDD/3.3V When MICL[1:0] bits are “11”, MPWR1/2 output AVDD via internal switch (Switch ON resistance: Typ. 37, Max. 62). Note 11. PSRR is referred to all power supplies with 100mVpp sine wave. 019000890-E-00 2019/02 - 10 - Document Outline 1. General Description 2. Features 3. Table of Contents 4. Block Diagram 5. Pin Configurations and Functions 5.1. Pin Configurations 5.2. Functions 5.3. Handling of Unused Pin 5.4. Pin State In Power-down Mode 6. Absolute Maximum Ratings 7. Recommended Operating Conditions 8. Electrical Characteristics 8.1. Microphone & ADC Analog Characteristics (AVDD=3.3V: AVDDL bit = “0”) 8.2. Microphone & ADC Analog Characteristics (AVDD=1.8V: AVDDL bit = “1”) 8.3. Power Supply Current 8.4. Power Consumption for Each Operation Mode 8.5. ADC1/2 Short Delay Sharp Roll-off Filter (ADVF bit = “0”) 8.6. ADC1/2 Digital Filter for Voice (ADVF bit = “1”) 8.7. DC Characteristics 8.8. Switching Characteristics 9. Functional Descriptions 9.1. Internal Pull-down Pin 9.2. LDO Circuit 9.3. System Clock 9.4. PLL 1. PLL Output Frequency (MCKO pin) 2. BCLK Output Frequency 3. Internal Block Diagram of PLL (3-1) PLL Reference Clock Divider (PLD) (3-2) PLL Feedback Clock Divider (PLM) 4. Adaptive Frequencies 5. Example of PLL Frequency Setting 9.5. Audio Interface Format 9.6. Synchronization with audio system (SYNCDET) 9.7. MIC/LINE Input 9.8. Microphone Amplifier Gain 9.9. Microphone Power 9.10. MIC Input Start-Up Time 9.11. ADC1/2 Initialization Cycle 9.12. Mono/Stereo Mode 9.13. Digital Microphone 9.14. Digital Block 9.14.1. Programmable Phase Adjustment 9.14.2. High Pass Filter (ADC1/2) 9.14.3. ADC1/2 Digital Filter 9.14.4. Microphone Sensitivity Adjustment 9.14.5. Monaural (MIX) Selection 9.14.6. High Pass Filter (HPF1/2) 9.14.7. Low Pass Filter (LPF1/2) 9.14.8. ALC Operation 9.14.9. Input Digital Volume (Manual Mode) 9.14.10. ALC 4ch Link Mode Sequence 9.15. Digital Voice Activity Detector 9.15.1. VDLY 9.15.2. HPF, LPF 9.15.3. ABS 9.15.4. NLD (Noise Level Detector) 9.15.5. MAX 9.15.6. MULT (X) 9.15.7. Comparator (>) 9.15.8. Guard Timer 9.15.9. Interrupt Output (WINTN pin) 9.15.10. Output Selector 9.16. I2C-bus Control Interface 9.17. Register Map 9.18. Register Definition 10. Recommended External Circuits 11. Control Sequence 11.1. Clock Set Up 11.1.1. PLL Master Mode 11.1.2. PLL Slave Mode (BCLK pin) 11.1.3. PLL Slave Mode (MCKI pin) 11.1.4. External Slave Mode 11.1.5. External Master Mode 11.2. Voice Activity Detection (1ch Mic) 11.3. Microphone Input Recording (4ch) 11.4. Stop of Clock 11.4.1. PLL Master Mode 11.4.2. PLL Slave Mode (BCLK pin) 11.4.3. PLL Slave Mode (MCKI pin) 11.4.4. External Slave Mode 11.4.5. External Master Mode 11.5. Power Down 12. Package 12.1. Outline Dimensions 12.2. Material & Lead finish 12.3. Marking 13. Ordering Guide 14. Revision History IMPORTANT NOTICE