AK4370 参数 Datasheet PDF下载

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

- I

2

S, 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)

2

μ

P Interface: 3-wire/I C

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