GENERAL DESCRIPTION
●The AK4556 is a low voltage 24bit 192kHz CODEC for high performance battery powered digital audio
●subsystems. The dynamic performance to power supply voltage ratio is very high, attaining 103dB and
●106dB SNR for ADC and DAC, respectively. Sampling rates up to 216kHz are supported. The AK4556
●reduces jitter sensitivity by using an integrated switched-capacitor filter. The analog inputs and outputs
●are single-ended to minimize pin count and external filtering requirements. Packaged in a very small
●20-pin TSSOP, the AK4556 is ideal for space-sensitive applications.
●FEATURES
●□ Single-ended ADC
● - Dynamic Range, S/N: 103dB@VA=3.0V
● - S/(N+D): 91dB@VA=3.0V
● - HPF for DC-offset cancel (fc = 1Hz @ fs=48kHz)
● - HPF can be disabled
●□ Single-ended DAC
● - Dynamic Range, S/N: 106dB@VA=3.0V
● - S/(N+D): 90dB@VA=3.0V
● - Digital de-emphasis for 32kHz, 44.1kHz and 48kHz sampling
●□ Audio I/F format: MSB First, 2’s Complement
● - ADC: 24bit MSB justified or I2S compatible
● - DAC: 24bit MSB justified, 24bit LSB justified or I2S compatible
●□ Input/Output Voltage: ADC = 2.1Vpp @ VA=3.0V
● DAC = 2.1Vpp @ VA=3.0V
●□ Master/Slave mode
●□ Sampling Rate:
● - Normal Speed: 8kHz to 54kHz (256fs or 512fs)
● 8kHz to 48kHz (384fs or 768fs)
● - Double Speed: 54kHz to 108kHz (256fs)
● 48kHz to 96kHz (384fs)
● - Quad Speed: 108kHz to 216kHz (128fs)
● 96kHz to 192kHz (192fs)
● Master Clock:
● - Slave mode: 256fs, 384fs, 512fs or 768fs (Normal Speed)
● 256fs or 384fs (Double Speed)
● 128fs or 192fs (Quad Speed)
● - Master mode: 256fs or 512fs (Normal Speed)
● 256fs (Double Speed)
● 128fs (Quad Speed)
●□ Power Supply: 2.4 to 3.6V (Normal Speed, Double Speed)
● 2.7 to 3.6V (Quad Speed)
●□ Power Supply Current: 27.5mA
●□ Ta = -40 to 85°C
●□ Very Small Package: 20pin TSSOP
●□ Upper compatible with AK4552
