AK4634 Datasheet, PDF (8/77 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

[AK4634]
Parameter
Min
Typ
max
Units
Speaker-Amp Characteristics: SDTI → SPP/SPN pins, ALC2 bit = “0”, SPKG bit = “0”, C_L=3μF, R_series=10Ω x 2,
BTL, SVDD=3.8V
Output Voltage (0dBFS)
(Note 11)
-
2.5
-
Vrms
S/(N+D) (Note 12)
-
20
-
dB
Output Noise Level (Note 12)
-
-68
-
dBV
Load Impedance (Note 13)
50
-
-
Ω
Load Capacitance
-
-
3
μF
Power Supplies
Power Up (PDN pin = “H”)
All Circuit Power-up: (Note 17)
AVDD+DVDD
fs=8kHz
-
9
-
mA
fs=48kHz
-
12
TBD
mA
SVDD: Speaker-Amp Normal Operation (No Output)
SVDD=3.3V
-
1.5
TBD
mA
Power Down (PDN pin = “L”) (Note 18)
AVDD+DVDD+SVDD
-
1
TBD
μA
Note 6. The voltage difference between MICP and MICN pins. AC coupling capacitor should be connected in series at
each input pin. Full-differential mic input is not available at MGAIN3-0 bits = “1000” or “0000”. Maximum input
voltage of MICP and MICN pins are proportional to AVDD voltage, respectively.
Vin = |(MICP) − (MICN)| = 0.069 x AVDD(max)@MGAIN3-0 bits = “0001”,
0.035 x AVDD(max)@MGAIN3-0 bits = “0010”, 0.017 x AVDD(max)@MGAIN3-0 bits = “0011”,
0.218x AVDD(max)@MGAIN3-0 bits = “0100”, 0.097x AVDD(max)@MGAIN3-0 bits = “0101”,
0.048x AVDD(max)@MGAIN3-0 bits = “0110”, 0.024x AVDD(max)@MGAIN3-0 bits = “0111”,
0.345x AVDD(max)@MGAIN3-0 bits = “1001”
When the signal larger than above value is input to MICP or MICN pin, ADC does not operate normally.
Note 7. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ)
Note 8. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD (typ)
Note 9. When a PLL reference clock is the FCK pin in PLL Slave Mode, S/ (N+D) of MICÆADC is 75dB (typ), S/
(N+D) of DACÆAOUT is 75dB (typ).
Note 10. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ)@LOVL bit = “0”.
Note 11. The value after passing LPF (LPF : Passband is 20kHz or less, Stopband Attenuation@250kHz is –50dB or less)
Note 12. In case of measuring at between the SPP pin and SPN pin directly.
Note 13. Load impedance is total impedance of series resistance (R_series) and piezo speaker impedance at 1kHz in
Figure 44. Load capacitance is capacitance of piezo speaker. When piezo speaker is used, 10Ω or more series
resistors should be connected at both SPP and SPN pins, respectively.
Note 14. Maximum input voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD
x Rin/20kΩ (typ).
Note 15. Output voltage is proportional to AVDD voltage. Vout = 0.6 x AVDD (typ).
Note 16. Input Voltage does not depend on AVDD voltage.
Note 17. PLL Master Mode (MCKI = 12MHz) and PMMP = PMADC = PMDAC = PMPFIL = PMSPK = PMVCM =
PMPLL = MCKO = PMAO = M/S = “1”. And output current from the MPI pin is 0mA.
EXT Slave Mode (PMPLL = M/S = MCKO bits = “0”): AVDD+DVDD = (typ) TBDmA@fs=8kHz,
(typ)TBDmA @fs=48kHz
Note 18. All digital inputs pins are fixed to DVDD or VSS2.
Rev. 0.5
2007/10
-8-