AK4537 Datasheet, PDF (1/76 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4537]
AK4537
16-Bit ∆Σ Stereo CODEC with MIC/HP/SPK-AMP
GENERAL DESCRIPTION
The AK4537 targeted at PDA and other low-power, small size applications. It features a 16-bit 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 AK4537 is available in a
52-QFN, utilizing less board space than competitive offerings.
FEATURES
1. Resolution : 16bits
2. Recording Function
• Stereo Mic Input
• Stereo Line Input
• 1^st MIC Amplifier : +20dB or 0dB
• 2^nd Amplifier with ALC
+27.5dB ∼ -8dB, 0.5dB Step (MIC input)
+12dB ∼ -23.5dB, 0.5dB Step (LINE input)
• ADC Performance : S/(N+D) : 79dB, DR, S/N : 83dB (MIC input)
S/(N+D) : 88dB, DR, S/N : 91dB (LINE input)
3. Playback Function
• Digital De-emphasis Filter (tc=50/15µs, fs=32kHz, 44.1kHz, 48kHz)
• Digital Volume (0dB ∼ -127dB, 0.5dB Step, Mute)
• Stereo 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
- Output Power : 400mW@8Ω (BEEP Input, HVDD=3.3V)
300mW@8Ω (MIN Input, ALC2=OFF, HVDD=3.3V)
• Mono and Stereo Beep Inputs
• Mono Line Output
- Differential Output
- Performance : S/(N+D) : 89dB, S/N : 95dB
• Stereo Line Output
- Performance : S/(N+D) : 88dB, S/N : 92dB
4. Power Management
5. Master Clock
(1) PLL Mode
• Frequencies : 11.2896MHz, 12MHz and 12.288MHz
• Input Level : CMOS
(2) External Clock Mode
• Frequencies : 2.048MHz ∼ 12.288MHz
6. Output Master Clock Frequencies : 32fs/64fs/128fs/256fs
7. Sampling Rate :
(1) PLL mode
• 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz
(2) External Clock mode
• 8kHz ∼ 48kHz
8. Control mode: 4-wire Serial / I²C Bus
9. Master/Slave mode
MS0202-E-04
-1-
2005/04