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

2017-10-06 | Return

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

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.

Main Specifications

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 step	0 or 15
Group Delay	4.4 / fs	5.5 / 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
Channel	2	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.

Source:http://www.akm.com/