AK5704 ADC Datasheet

AK5704 Datasheet, PDF, Equivalent


Part Number

AK5704

Description

Low-Power 4-ch 32-bit ADC

Manufacture

AKM

Total Page 30 Pages
Datasheet
Download AK5704 Datasheet


AK5704
[AK5704]
AK5704
Low-Power 4-ch 32-bit ADC with MIC-Amp
1. General Description
The AK5704 is a high performance analog front-end AD converter IC ideal for voice recognition, voice
control, and conferencing applications. The device has a built-in 4-ch 32-bit ADC and a low noise
microphone amplifier and extracts full performance of a high S/N microphone with low power
consumption by achieving dynamic range of 105dB. It is possible to support up to 16-ch microphone array
by connecting multiple AK5704s. In addition, since it incorporates ultra-low power consumption voice
activity detection, power consumption during wait time is greatly reduced. The AK5704
2. Features
1. Recording Function
4-Channel Low Power 32-bit ADC
2-types Digital Filter (Low-latency [5/fs] Sharp Roll-off and Voice)
Single-ended Inputs or Full-differential Inputs
MIC Amplifier Gain: +30 dB to 0 dB, 3 dB step
2-output MIC Power Supplies: 2.8 V / 2.5 V / 1.8 V / Direct Mode Selectable
ADC Characteristics:
S/N, DR: 105 dB, THD+N: 90 dB, (Gain = 0 dB)
S/N, DR: 96 dB, THD+N: 86 dB, (Gain = +18 dB)
Excellent Power Supply Noise Reduction
PSRR: 60dB
Spurious Free Dynamic Range: 100dBc
4-Channel Digital MIC Interface
Programmable Phase Adjustment
Microphone Sensitivity Adjustment
2. Digital Voice Activity Detector
3. Programmable Digital Filter
Mixer
2nd order HPF and LPF
Digital ALC (Automatic Level Control): 4-ch Link Mode, 2-ch Mode
4. Digital Audio interface
Master/Slave mode
Sampling Frequency:
8 k, 11.025 k, 12 k, 16 k, 22.05 k, 24 k, 32 k, 44.1 k, 48 k, 88.2 k, 96 k,
176.4 k, 192 kHz
Interface Format
- 32/24/16-bit I2S/MSB justified, 16-bit PCM Short/Long Frame
- 4-ch TDM
- 8/12/16-ch Cascade TDM
5. Built-in PLL
6. Control I/F: I2C-bus (400kHz)
7. Operation Temperature Range: Ta = 40 to 85°C
8. Power Supply:
AVDD (ADC, MIC, PLL):
1.7 to 1.9 V or 3.0V to 3.6V
TVDD (Host & Audio I/F, LDO12): 1.65 to 3.6 V
9. Package: 28-pin QFN
019000890-E-00
-1-
2019/02

AK5704
[AK5704]
3. Table of Contents
1. General Description .............................................................................................................................. 1
2. Features ................................................................................................................................................ 1
3. Table of Contents .................................................................................................................................. 2
4. Block Diagram....................................................................................................................................... 4
5. Pin Configurations and Functions......................................................................................................... 5
5.1. Pin Configurations ................................................................................................................... 5
5.2. Functions ................................................................................................................................. 6
5.3. Handling of Unused Pin........................................................................................................... 7
5.4. Pin State In Power-down Mode............................................................................................... 8
6. Absolute Maximum Ratings .................................................................................................................. 9
7. Recommended Operating Conditions .................................................................................................. 9
8. Electrical Characteristics .................................................................................................................... 10
8.1. Microphone & ADC Analog Characteristics (AVDD=3.3V: AVDDL bit = “0”)........................ 10
8.2. Microphone & ADC Analog Characteristics (AVDD=1.8V: AVDDL bit = “1”)........................ 12
8.3. Power Supply Current ........................................................................................................... 14
8.4. Power Consumption for Each Operation Mode..................................................................... 14
8.5. ADC1/2 Short Delay Sharp Roll-off Filter (ADVF bit = “0”) ................................................... 15
8.6. ADC1/2 Digital Filter for Voice (ADVF bit = “1”) .................................................................... 16
8.7. DC Characteristics................................................................................................................. 17
8.8. Switching Characteristics ...................................................................................................... 18
9. Functional Descriptions ...................................................................................................................... 28
9.1. Internal Pull-down Pin............................................................................................................ 28
9.2. LDO Circuit ............................................................................................................................ 28
9.3. System Clock......................................................................................................................... 29
9.4. PLL......................................................................................................................................... 30
9.5. Audio Interface Format .......................................................................................................... 38
9.6. Synchronization with audio system (SYNCDET) .................................................................. 46
9.7. MIC/LINE Input ...................................................................................................................... 47
9.8. Microphone Amplifier Gain .................................................................................................... 49
9.9. Microphone Power................................................................................................................. 50
9.10. MIC Input Start-Up Time........................................................................................................ 51
9.11. ADC1/2 Initialization Cycle .................................................................................................... 51
9.12. Mono/Stereo Mode ................................................................................................................ 52
9.13. Digital Microphone ................................................................................................................. 53
9.14. Digital Block ........................................................................................................................... 55
9.14.1. Programmable Phase Adjustment .................................................................................. 56
9.14.2. High Pass Filter (ADC1/2) ............................................................................................... 57
9.14.3. ADC1/2 Digital Filter........................................................................................................ 57
9.14.4. Microphone Sensitivity Adjustment ................................................................................. 58
9.14.5. Monaural (MIX) Selection................................................................................................ 58
9.14.6. High Pass Filter (HPF1/2) ............................................................................................... 59
9.14.7. Low Pass Filter (LPF1/2)................................................................................................. 59
9.14.8. ALC Operation................................................................................................................. 60
9.14.9. Input Digital Volume (Manual Mode)............................................................................... 65
9.14.10. ALC 4ch Link Mode Sequence........................................................................................ 66
9.15. Digital Voice Activity Detector ............................................................................................... 67
9.15.1. VDLY ............................................................................................................................... 68
9.15.2. HPF, LPF......................................................................................................................... 68
9.15.3. ABS.................................................................................................................................. 69
9.15.4. NLD (Noise Level Detector) ............................................................................................ 70
9.15.5. MAX ................................................................................................................................. 72
9.15.6. MULT (X) ......................................................................................................................... 72
9.15.7. Comparator (>) ................................................................................................................ 72
9.15.8. Guard Timer .................................................................................................................... 73
9.15.9. Interrupt Output (WINTN pin) .......................................................................................... 74
019000890-E-00
-2-
2019/02


Features [AK5704] AK5704 Low-Power 4-ch 32-bit A DC with MIC-Amp 1. General Description The AK5704 is a high performance analo g front-end AD converter IC ideal for v oice recognition, voice control, and co nferencing applications. The device has a built-in 4-ch 32-bit ADC and a low n oise microphone amplifier and extracts full performance of a high S/N micropho ne with low power consumption by achiev ing dynamic range of 105dB. It is possi ble to support up to 16-ch microphone a rray by connecting multiple AK5704’s. In addition, since it incorporates ult ra-low power consumption voice activity detection, power consumption during wa it time is greatly reduced. The AK5704 2. Features 1. Recording Function 4-Channel Low Power 32-bit ADC 2-typ es Digital Filter (Low-latency [5/fs] S harp Roll-off and Voice) • Single-en ded Inputs or Full-differential Inputs • MIC Amplifier Gain: +30 dB to 0 dB , 3 dB step • 2-output MIC Power Sup plies: 2.8 V / 2.5 V / 1.8 V / Direct Mode Selectable • ADC Characterist.
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