AK4691 Datasheet, PDF (11/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
Parameter
min
typ
max
Units
Speaker-Amp Characteristics: DAC → SPP/SPN pins, ALC=OFF, IVOL=DVOL=0dB, R_L=8Ω, BTL, SVDD=3.0V
(Note 27)
Output Voltage (Note 26)
SPKG1-0 bits = “00”, 0dBFS (Po=140mW)
-
0.5
-
dBV
SPKG1-0 bits = “10”, −3.75dBFS (Po=240mW)
1.4
3
4.6
dBV
SPKG1-0 bits = “11”, −3.75dBFS, SVDD=3.3V,
(Po=400mW)
-
5
-
dBV
S/(N+D)
SPKG1-0 bits = “00”, 0dBFS (Po=140mW)
-
60
-
dB
SPKG1-0 bits = “10”, −3.75dBFS (Po=240mW)
20
50
-
dB
SPKG1-0 bits = “11”, −3.75dBFS, SVDD=3.3V
(Po=400mW)
-
20
-
dB
S/N
(A-weighted)
80
90
-
dB
Load Resistance
8
-
-
Ω
Load Capacitance
-
-
30
pF
Mono Input: BEEP pin (External Input Resistance=20kΩ)
Maximum Input Voltage (Note 28)
-
1.8
-
Vpp
Gain (Note 29)
BEEP Æ LOUT/ROUT
BEEP Æ HPL/HPR
BEEP Æ SPP/SPN
LVOL2-0 bits = “000”
HPG bit = “0”
−4.5
−24.5
0
+4.5
dB
−20
−15.5
dB
ALC bit = “0”, SPKG1-0 bits = “00”
−0.57
+4.43
+8.93
dB
ALC bit = “0”, SPKG1-0 bits = “01”
-
+6.43
-
dB
ALC bit = “0”, SPKG1-0 bits = “10”
-
+10.65
-
dB
ALC bit = “0”, SPKG1-0 bits = “11”
-
+12.65
-
dB
ALC bit = “1”, SPKG1-0 bits = “00”
-
+6.43
-
dB
ALC bit = “1”, SPKG1-0 bits = “01”
-
+8.43
-
dB
ALC bit = “1”, SPKG1-0 bits = “10”
-
+12.65
-
dB
ALC bit = “1”, SPKG1-0 bits = “11”
-
+14.65
-
dB
Note 26. Output voltage is proportional to AVDD voltage. But actual speaker output level is clipped according to the
supplied SVDD voltage.
Vout = typ. 1.0 x AVDD Vpp @ SPKG1-0 bits = “00” & 0dBFS, typ. 1.26 x AVDDVpp @ SPKG1-0 bits = “01”
& 0dBFS, typ. 2.04 x AVDDVpp @ SPKG1-0 bits = “10” & 0dBFS, typ. 2.58 x AVDDVpp @ SPKG1-0 bits =
“11” & 0dBFS at Full-differential.
Note 27. In case of measuring at the SPP and SPN pins.
Note 28. The Maximum voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD x
Rin / 20kΩ (typ).
Note 29. The gain is in inverse proportion to external input resistance.
* 0dBV = 1Vrms = 2.83Vpp
MS0672-E-00
- 11 -
2007/11