News Release

- New Product Information -

AKM releases the smallest class* 18-bit 1.1MHz A/D converter in the world; the AK9232 simplifies system construction

Product Name
AK9232, AK9233, AK9234
Product category:
Industrial LSI > Industrial AFEs & ADCs
18-bit/16-bit/14-bit 1.1MHz 2ch
Industrial A/D Converter
Encoders for Motor Control, Current and Other Measurements for Small Instruments


Normally, SAR A/D converters are used in a system that needs real time response.  However, it is not easy to construct a system or improve characteristics with an SAR A/D converter since its acquisition time becomes shorter and the input capacitance becomes larger when seeking high speed and high accuracy performance.

In February 2017, Asahi Kasei Microdevices Corporation, (AKM), has launched three products of new concept A/D converters, “Zero Latency Delta Sigma ADC”, that have both SAR’s high accuracy and Delta Sigma’s high linearity.  An 18-bit, 1.1MHz 2ch ADC: the AK9232, realizes low input capacity and long acquisition time while maintaining high speed and high accuracy.  It is housed in a small 4mm x 4mm package, shrinking system construction and improving characteristics. 16-bit and 14-bit versions of the AK9232 are also available: the AK9233 and the AK9234.

This line-up of industrial ADCs will be shown at TECHNO-FRONTIER 2017, (Motor Technology Exhibition), starting April 19th at Makuhari Messe.


● Realizing Low Input Capacitance and Long Acquisition Time

Longer acquisition time and lower input capacitance are accomplished with the ZDS architecture that is developed from many years’ experience from AKM in Mixed-signal LSI technologies, comparing to a general SAR ADC. The ZDS architecture reduces ADC amplifier load.  The AK9232/3/4 contributes to improving accuracy and speed of your system.

● Smallest Class in the World*

The AK9232 adopts the smallest package, (4mm x 4mm), in the industry as a 2ch 18-bit ADC.

[Notes] * As a 2ch 18-bit 1MHz A/D converter, according to AKM research as of February 1st, 2017.

● Offset/Gain/Phase Adjustment Function

Offset/Gain/Phase adjustments for converted signal are available on each channel independently.

● Polar Coordinate Output Function

The AK9232/3/4 is capable to output the polar coordinate, (angle, “θ”, moving radius, “r”), when the cosine wave and sine wave are input to the CH0 and the CH1, respectively, from the result of simultaneous conversion of the input signal of the CH0 and the CH1.



Product Name AK9232
(ZDS A/D Converter)
(ZDS A/D Converter)
(ZDS A/D Converter)
Sampling Rate[SPS]50k to 1.1M
2 ch
Input Capacitance (typ.)[pF]32
Acquisition Time (min.)[ns]600
DNL (typ.)[LSB]-0.8 to +0.8-0.8 to +0.8-0.6 to +0.6
INL (typ.)[LSB]-2.5 to +2.5-0.6 to +0.6-0.2 to +0.2
S/(N+D) (typ.)[dBFS]878784
S/N (typ.)[dBFS]878784
THD (typ.)[dB]-96-96-94
Integrated Parts
& Functions

Reference Voltage (VREF): Selectable from Internal 2.5V constant voltage, HVDD tracking and External VREF
Polar Coordinate Output Function
Offset/Gain/Phase Adjustment Function
Power Supply[V]VDD: 1.7 to 2.0
HVDD: 4.75 to 5.25
DRVDD: 2.7 to 5.25
Current Consumption
60mA/ch w/Vref
Operation Temperature[°C]-40 to 105
24-pin QFN  (4 x 4mm, 0.5mm pitch)
* 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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