AK4370 Datasheet, PDF (1/49 Pages) Asahi Kasei Microsystems – 24-Bit 2ch DAC with HP-AMP & Output Mixer

ASAHI KASEI
[AK4370]
AK4370
24-Bit 2ch DAC with HP-AMP & Output Mixer
GENERAL DESCRIPTION
The AK4370 is a 24-bit DAC with headphone amplifier. The AK4370 features an analog mixing circuit that
allows easy interfacing in mobile phone and portable communication designs. The integrated headphone
amplifier features “pop-noise free” power-on/off, a mute control, and it delivers 40mW of power into 16Ω.
The AK4370 is packaged in a 24-pin QFN (4mm×4mm) package, ideal for portable applications.
FEATURE
† Multi-bit ΔΣ DAC
† Sampling Rate
- 8kHz ∼ 48kHz
† On chip perfect filtering 8 times FIR interpolator
- Passband: 20kHz
- Passband Ripple: ±0.02dB
- Stopband Attenuation: 54dB
† Digital De-emphasis Filter: 32kHz, 44.1kHz and 48kHz
† System Clock
- 256fs/384fs/512fs/768fs/1024fs
- Input Level: AC Couple Input Available
† Audio I/F Format: MSB First, 2’s Complement
- I²S, 24bit MSB justified, 24bit/20bit/16bit LSB justified
- Master/Slave Mode
† Digital Mixing: LR, LL, RR, (L+R)/2
† Bass Boost Function
† Digital ATT
† Analog Mixing Circuit: 4 Inputs (Single-ended or Full-differential)
† Stereo Lineout
- S/N: 90dB@3.3V
- Output Volume: +6 to –24dB (or 0 to –30dB), 2dB step
† Headphone Amplifier
- Output Power: 40mW x 2ch @16Ω, 3.3V
- S/N: 92dB@3.3V
- Pop Noise Free at Power-ON/OFF and Mute
- Output Volume: 0 ~ –63dB & +12/+6/0 dB Gain
1.5dB step (0 ~ –30dB), 3dB step (–30 ~ –63dB)
† μP Interface: 3-wire/I²C
† Power Supply: 1.6V ∼ 3.6V
† Power Supply Current: 3.8mA @1.8V (6.8mW, DAC+HP, No output)
† Ta: −30 ∼ 85°C
† Small Package: 24pin QFN (4mm x 4mm, 0.5mm pitch)
† Register Compatible with AK4368
MS0595-E-00
-1-
2007/03