News Release

- New Product Information -

2017/10/06
AKM releases the AK5522, an A/D Converter with Enhanced Environmental Noise Tolerance

Product Name
AK5522VN
Product category:
Audio > Audio A/D converter > Automotive ADCs
Title
32-bit 2ch A/D Converter
PSRR: 80dB, CMRR: 80dB, DR: 108dB
Applications
Car Audio Amplifiers, Active Noise Cancellation Systems, USB Audio Interfaces, Wireless Speakers, Electronic Instruments
AK5522VN

Description

For car audio amplifiers, high environmental noise tolerance from DC-DC converter power supplies are required.  Suitable to this need, Asahi Kasei Microdevices Corporation, (AKM), has released the AK5522VN, an automotive stereo A/D converter, (ADC), with enhanced resistance to power supply noise and system board noise.  Directly connecting the DC-DC converter output to the AK5522VN as a power supply is possible, accomplishing a rich sound field and bass expressions, and distortion-free recording regardless of usage environment.  In addition, analog characteristics such as the dynamic range are optimized based on VELVET SOUND (TM) technology that has been widely adopted by well-established high-end audio companies.
The AK5522VN is also ideal for non-automotive applications, such as USB audio interfaces and wireless speakers since it has high tolerance to supply and system noise.

Features

● World highest class *1 performance achieved at 80dB PSRR and 80dB CMRR even with a signal input

The AK5522VN maintains high PSRR with or without a signal input.  The high PSRR and CMRR performance are achieved not only for the typical test condition of 1kHz, but also for wideband environmental noise of up to 3 MHz.  Excellent noise tolerance in a real-world design enables the reduction of peripheral parts and cost enabling lower system cost and a smaller total footprint.

● Integrated high PSRR regulator for an external DAC power supply

By supplying power from the AK5522VN to a D/A converter, (DAC), it is possible to maximize the performance of the DAC even with a system using a DC-DC converter or a USB bus power supply with a noisy supply.

● Low jitter audio PLL to generate the internal master clock from LRCK/BICK

This eliminates the need for unnecessary routing of a high frequency master clock on the board, enabling a low EMI solution.  In addition, a low jitter master clock to the DAC will help prevent

● Support AEC-Q100 Grade 2

The AK5522VN supports an operating temperature range of -40 ~ 105°C.

*1  According to AKM’s research on 2017/5/18.

Figure1

Main Specifications

AK5522VN
AK5522VN
Automotive A/D Converter
PSRR (dB)80
CMRR (dB) 80
Input Full Differential / Pseudo Differential / Single Ended
DR, S/N (dB) 108
THD+N (dB) -98
PGA (dB) -3 to +12 / 1dB step
PLL Generate MCLK from LRCK/BICK, Enable to Output MCLK
Sampling Rate (kHz) 8 to 216
Resolution 32-bit
Internal Filte 4 Types of Digital LPF, Digital HPF
Group Delay 4.4 / fs (Short Delay Slow roll-off)
Control Mode Pin Setting / I2C Bus Setting
Output Format MSB justified, I2S or TDM (maximum 4 cascades connection is available)
Power Consumption (mW) 76
Power Supply (V) Analog = 4.5 to 5.5 / 3.0 to 3.6
Digital = 1.7 to 1.98 / 3.0 to 3.6
* Automatic detection circuit of the power supply is integrated.
Operation Temperature (°C) -40 to 105
Package 24-pin QFN
(4 x 4 mm)

Lineup

Products Name AK5522VN
AK5720VT
PSRR (dB) 80 (typ) 50 (typ)
CMRR (dB) 80 (typ) -
Input Type Full Differential
/ Pseudo Differential
/ Single Ended
Single Ended
Input Voltage to 2.1 Vrms to 1.06 Vrms @5V
to 0.64 Vrms @3.3V
S/(N+D) (dB) 98 (typ) 94 (typ)
DR, S/N (dB) 108 (typ) 102 (typ)
PGA (dB) -3 to +12 / 1dB step0 or 15
Group Delay 4.4 / fs5.5 / fs
Sampling Rate (kHz) 8 to 216 8 to 96
Power Supply (Analog) 4.5 to 5.5
3.0 to 3.6
2.7 to 5.5
Digital I/F 3.0 to 3.6
1.7 to 1.98
2.7 to 5.5
Resolution 32-bit 24-bit
Channel2 2
Power Consumption (mW) 76 27
Operation Temperrature (°C) -40 to 105-40 to 105
Package 24-pin QFN
(4 x 4mm)
16-pin TSSOP
(5.0 x 6.4mm)
[Notes]
* Information on this page is current on the date of press release.
* AKM is trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
* Appellations, company names and product names on this page are trademarks or registered trademarks of respective companies.

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