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AK5734 Datasheet Preview

AK5734 Datasheet

4-Channel Differential Audio ADC

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[AK5734]
AK5734
4-Channel Differential Audio ADC with Diagnostics
1. General Description
The AK5734 is a 4-channel audio ADC with an integrated SAR ADC, enabling robust error detection.
The error detection function monitors the connection status of the line and microphone inputs. The
AK5734 includes mic PGAs (pre-gain amplifiers) and programmable microphone bias. These functions
make it ideal for microphone array applications such as automotive ANC (Active Noise Cancelation).
The digital audio interface supports I2S, multi-slot TDM, and left-justified formats, making it easy to
connect to your DSP of choice.
2. Features
1. Audio ADC
- 4-Channel Audio ADC
- Full-differential Input and Single-ended Input
- PGA for Microphone: 0dB or 6dB - 20dB (1dB step)
- Input Voltage: 2.0 Vrms
- ADC Performance:
S/(N+D): typ 92B
DR, S/N: typ 100dB
- 5 Types of LPF
Voice Filter
Sharp Roll Off Filter
Slow Roll Off Filter
Short Delay Sharp Roll Off Filter (GD=4.9/fs)
Short Delay Slow Roll Off Filter (GD=4.3/fs)
- Digital Volume: MUTE, -115dB - +52dB (1dB step)
- Digital HPF for DC-offset cancellation: fc=2Hz
2. Sampling Rate: 8kHz - 192kHz
3. Master Clock: 128fs, 192fs, 256fs, 384fs, 512fs, 1024fs, 2048fs
4. Master/Slave Mode
5. Audio Interface Format: MSB First, 2’s complement
- 16/24bit I2S
- 16/24bit Left justified
- 16/24bit TDM interface up to 16ch cascaded connection
6. SAR ADC
- 1ch SAR ADC for Error Detection
7. Error Detect Function
- Open
- Short across Inputs
- Short to Ground
- Short to MIC Bias Voltage
- Short to Battery
- MIC Bias Over Current/Voltage
- Charge Pump Under Voltage
- Over Temperature
8. Programmable MIC Bias Voltage: 5V - 9V (0.5V step)
9. P I/F: I2C-Bus (Ver 1.0, 400kHz mode) or SPI
10. Power Supply:
- AVDD= 3.0 - 3.6V (typ. 3.3V)
- DVDD = 3.0 - 3.6V (typ. 3.3V) or 1.7- 1.98V (typ. 1.8V)
- CPVDD = 3.0 - 3.6V (typ. 3.3V)
11. Operating Temperature Range: Ta = 40 - 105C
12. Package: 48-pin QFN (7x7mm, 0.5mm pitch)
200200018-E-00
-1-
2020/02




AKM

AK5734 Datasheet Preview

AK5734 Datasheet

4-Channel Differential Audio ADC

No Preview Available !

[AK5734]
3. Table of Contents
1. General Description............................................................................................................................. 1
2. Features............................................................................................................................................... 1
3. Table of Contents ................................................................................................................................ 2
4. Block Diagram ..................................................................................................................................... 3
■ Block Diagram ..................................................................................................................................... 3
5. Pin Configurations and Functions ....................................................................................................... 4
■ Pin Configurations ............................................................................................................................... 4
■ Pin Functions ....................................................................................................................................... 5
Handling of Unused Pins ..................................................................................................................... 7
6. Absolute Maximum Ratings................................................................................................................. 8
7. Recommended Operating Conditions ................................................................................................. 9
8. Analog Characteristics ...................................................................................................................... 10
9. Filter Characteristics.......................................................................................................................... 15
ADC Filter Characteristics (fs = 16kHz) (VOICE bit = “1”) ................................................................ 15
ADC Filter Characteristics (fs = 48kHz) ............................................................................................ 16
■ ADC Filter Characteristics (fs = 96kHz) ............................................................................................ 18
■ ADC Filter Characteristics (fs = 192kHz) .......................................................................................... 20
10. DC Characteristics............................................................................................................................. 22
11. Switching Characteristics .................................................................................................................. 23
System Clocks ................................................................................................................................... 23
Audio Interface .................................................................................................................................. 27
Control Interface, Power-down, Reset .............................................................................................. 29
■ Timing Diagram ................................................................................................................................. 30
12. Functional Descriptions ..................................................................................................................... 34
■ Digital Core Power Supply ................................................................................................................ 34
■ Master Mode and Slave Mode .......................................................................................................... 34
■ System Clock..................................................................................................................................... 35
■ Clock Stop Detection Circuit.............................................................................................................. 38
■ Audio Interface Formats .................................................................................................................... 38
■ Cascade Connection in TDM Mode .................................................................................................. 44
■ Digital HPF......................................................................................................................................... 45
■ Digital Filter Setting ........................................................................................................................... 45
Digital Volume.................................................................................................................................... 46
■ Power Up/Down Sequence Example ................................................................................................ 47
■ Analog Input Connection ................................................................................................................... 49
Full Scale Clip Function..................................................................................................................... 51
Pre-Gain Amplifier (PGA) for MIC Input ............................................................................................ 52
Charge Pump .................................................................................................................................... 53
MIC Bias Voltage............................................................................................................................... 54
Error Detection Function ................................................................................................................... 55
■ Register Control Interface ................................................................................................................. 65
Register Map ..................................................................................................................................... 69
Register Definitions ........................................................................................................................... 72
13. Recommended External Circuits....................................................................................................... 80
■ Analog Input Pin Protection Resistor ................................................................................................ 81
■ Internal circuit protection resistor ...................................................................................................... 82
14. Package............................................................................................................................................. 83
■ Outline Dimensions ........................................................................................................................... 83
■ Material & Lead Finish....................................................................................................................... 83
Marking .............................................................................................................................................. 83
15. Ordering Guide .................................................................................................................................. 84
16. Revision History................................................................................................................................. 85
IMPORTANT NOTICE.............................................................................................................................. 86
200200018-E-00
-2-
2020/02



Part Number AK5734
Description 4-Channel Differential Audio ADC
Maker AKM
Total Page 3 Pages
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AK5734 Datasheet PDF





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