[AK4648]
AK4648
Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4648 is a stereo CODEC with a built-in Microphone-Amplifier, Headphone-Amplifier, and
Speaker-Amplifier. The AK4648 features analog mixing circuits and PLL that allows easy interfacing in
mobile phone and portable A/V player designs. The AK4648 is available in a CSP (3.7mm x 3.8mm),
utilizing less board space than competitive offerings.
FEATURES
1. Recording Function
•
4 Stereo Inputs Selector
•
Stereo Mic Input (Full-differential or Single-ended)
•
Stereo Line Input
•
MIC Amplifier (+32dB/+26dB/+20dB or 0dB)
•
Digital ALC (Automatic Level Control)
(+36dB
∼ −54dB,
0.375dB Step, Mute)
•
ADC Performance: S/(N+D): 83dB, DR, S/N: 86dB (MIC-Amp=+20dB)
S/(N+D): 88dB, DR, S/N: 95dB (MIC-Amp=0dB)
•
Wind-noise Reduction Filter
•
Stereo Separation Emphasis
•
Programmable EQ
2. Playback Function
•
Digital De-emphasis Filter (tc=50/15μs, fs=32kHz, 44.1kHz, 48kHz)
•
5-Band Equalizer
•
Soft Mute
•
Digital Volume (+12dB
∼ −115.0dB,
0.5dB Step, Mute)
•
Digital ALC (Automatic Level Control)
(+36dB
∼ −54dB,
0.375dB Step, Mute)
•
Stereo Separation Emphasis
•
Programmable EQ
•
Stereo Line Output
- Performance: S/(N+D): 88dB, S/N: 92dB
•
Stereo Headphone-Amp
- Support Pseudo Cap-less and Single-ended modes
- Analog Volume: + 3dB ~ - 33dB, 3dB Step
- S/(N+D): 70dB@7.5mW, S/N: 90dB
- Output Power: 40mW@16Ω (HVDD=3.6V)
62.5mW@16Ω (HVDD=4.5V)
- Pop Noise Free at Power ON/OFF
•
Stereo Speaker-Amp
- S/(N+D): 60dB @ 240mW, S/N: 90dB
- BTL
- Output Power: 820mW @ 8Ω, HVDD=3.6V, High Power Mono SPK Mode
1.6W @ 8Ω, HVDD=5V, High Power Mono SPK Mode
640mW @ 8Ω, HVDD=3.6V, Stereo SPK & Mono SPK Mode
1.0W @ 8Ω, HVDD=4.5V, Stereo SPK Mode
1.3W @ 8Ω, HVDD=5V, Mono SPK Mode
- Pop Noise Free at Power ON/OFF
•
Analog Mixing: 4 Stereo Input
3. Power Management
MS0625-E-01
-1-
2007/06
AKM [ ASAHI KASEI MICROSYSTEMS ]
