AK4640_05 Datasheet, PDF (1/78 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4640]
AK4640
16-Bit ∆Σ CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4640 targeted at PDA and other low-power, small size applications. It features a 16bit stereo
CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier and Speaker-Amplifier. Input circuits
include a Microphone-Amplifier and an ALC (Auto Level Control) circuit. The AK4640 is available in a
smaller 57pin BGA in addition to a 52pin QFN that has compatibility with the AK4534/8, utilizing less
board space than competitive offerings.
FEATURES
1. Resolution : 16bits
2. Recording Function
• Mono Input
• 2 to 1 Selector (Internal and External MIC)
• 1^st MIC Amplifier : +20dB or 0dB
• 2^nd Amplifier with ALC : +27.5dB ∼ −8dB, 0.5dB Step
• ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB
3. Playback Function
• Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (0dB ∼ −127dB, 0.5dB Step, Mute)
• Headphone-Amp
- S/(N+D) : 70dB, S/N : 90dB
- Output Power : 15mW@16Ω (HVDD=3.3V)
- Click Noise Free at Power ON/OFF
• Mono Speaker-Amp with ALC
- S/(N+D) : 64dB@150mW, S/N : 90dB
- BTL Output
- ALC circuit
- Output Power : 400mW@8Ω, THD+N=10% (HVDD=3.3V)
• Mono and Stereo Beep Inputs
4. Phone I/F
• Full-differential AUX Input
• Full-differential Mono Output
5. Power Management
6. Master Clock
(1) PLL Mode
• Frequencies : 11.2896MHz, 12MHz and 12.288MHz
• Input Level : CMOS
(2) External Clock Mode
• Frequencies : 2.048MHz ∼ 12.288MHz
7. Output Master Clock Frequencies : 32fs/64fs/128fs/256fs
8. Sampling Rate
(1) PLL Mode
• 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
(2) External Clock Mode
• 8kHz ∼ 48kHz
9. Control mode: 4-wire Serial / I²C Bus
10. Master/Slave mode
MS0273-E-02
-1-
2005/04