AK7846 Datasheet, PDF (6/16 Pages) Asahi Kasei Microsystems – Stereo Audio Class-D Amp with Power Booster for Piezo Speakers

AKEMDAKEMD CONFIDENTIAL
[AK7846]
ANALOG CHARACTERISTICS
(Unless otherwise noted, Ta＝25℃、VBAT=3.6Ｖ、DVDDI=2.8V、VSS1,2,3,4＝0V, Input Signal Frequency =1kHz ,
Measurement Band Width =20～20kHz ,PreGain=0dB , Fc= 16kHz Class-D ampu Output Load Impedance Z_L=150nF)
Parameter
Condition
min
typ
max
Units
No input signal.
Idd
With output Load
T.B.D
mA
ShutdownCurrent ^{PDN pin = ”Low”}
1.0
10
μA
INL
Input Impedance
INR
25
50
75
kΩ
25
50
75
kΩ
PreGain
Control Range
-6
+15
dB
PG2=”Low”,PG1=” Low”,PG0=” Low”
-7
-6
-5
dB
PG2=”Low”,PG1=” Low”,PG0=” High”
-4
-3
-2
dB
PG2=”Low”,PG1=” High”,PG0=” Low”
-1
PreGain
PG2=”Low”,PG1=” High”,PG0=” High”
+2
Step Size
PG2=” High”,PG1=” Low”,PG0=” Low”
+5
(Note 11)
PG2=” High”,PG1=” Low”,PG0=” High”
+8
0
+1
dB
+3
+4
dB
+6
+7
dB
+9
+10
dB
PG2=” High”,PG1=” High”,PG0=” Low”
+11
+12
+13
dB
PG2=” High”,PG1=” High”,PG0=” High”
+14
+15
+16
dB
Output Voltage
VCL(R)P/VCL(R)N
Input Signal=0.7Vrms
7.2
8.0
8.8
Vrms
Output
Offset Voltage
VCL(R)P/VCL(R)N
No input signal
-
-
T.B.D.
mV
THD+N
VCL(R)P/VCL(R)N (Note 12)
Input Signal=0.7Vrms
-
-
-30
dB
VCL(R)P/VCL(R)N (Note 12)
SNR
Input Signal=0.7Vrms
using an A wating filter.
70
80
-
dB
PSRR
(Note 13)
Cross Talk
VCL(R)P/VCL(R)N (Note 12)
Vripple=200mVpp@1kHz sinwave
INL：NoInput 、INR=2Vpp
Lch：OutputPin monitoring.
INR：NoInput 、INL=2Vpp
Rch：OutputPin monitoring.
50
70
dB
70
dB
Switching
Frequency
Class-D Amp
PowerBooster
225
250
275
kHz
900
1000
1100
Startup Time
(Note 14)
C3=0.01uF, C5=C6= 0.1uF(Note 15)
VBAT=2.7V
28
ms
Note 11. Setting accuracy of each setting is within ±1dB. Monotony is guaranteed.
Note 12 . Measure signals between VCL(R)N and VC L(R)P through Low-Pass-Filter (fc=20kHz).
Note 13. 200mVpp@1kHz superimposed signal at VBAT pin, and measured output.
Note 14. Time period from “PDN” turns “High” to stability operation.
Note 15. Refer to section “TYPICAL APPLICATION CIRCUIT”.
Rev.04.9
–6–
2008/03