[AK2331]
AK2331
DAC Type 8-bit 4-channel
Electronic Volume
Features
•
8-bit 4 channels of built-in multiplication D/A converters
•
Support for external one-path, internal three-path D/A converter reference voltages
•
Built-in buffer amplifier with low distortion (-60dB typ.) and rail-to-rail operation
•
Support for 3V control and 5V operation because of the three-wire serial system with
separate power supplies
•
Operating voltage range: 2.6 to 5.5V
•
Operating temperature range:
-40 to +85°C
•
Package： 16-pin QFNJ (3.0mm x 3.0mm x 0.70mm, 0.5-mm pitch)
Overview
The AK2331 is an electronic volume into which 8 bit 4 channels of multiplication D/A converters are
integrated on a single chip.
The reference voltage of the D/A converter can be selected from one external path (VREF pin level)
and internal three paths (VSS, AVDD, AVDD/2) for each channel and it can be used as a normal D/A
converter or an electronic volume that attenuates signals from input pins VIN0 to VIN3. A buffer
amplifier is incorporated as the subsequent stage of the D/A converter, which provides rail-to-rail
output and a signal with a distortion of -60dB.
In operational setting, the three-wire serial system, which synchronizes serial input (SDATA)
consisting of a 4-bit address and 8-bit data with the CSN and SCLK signals, is adopted, a power
supply (DVDD) is provided separately from the D/A converter, and 3V serial control and 5V D/A
converter operation are enabled. In addition, settings can be made so that the AVDD/2 level, which
was generated internally, is output to VOUT0 to VOUT3 pins through the buffer amplifier by bypassing
the D/A converter or the buffer amplifier is powered down.
A 16-pin small and low-profile QFNJ package (3.0mm square x 0.70mm height) is employed to
achieve high-density packaging.
MS0903-E-00
-1-
2008/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
