[AK4373]
No.
Pin Name
SPN
I/O
O
Function
Speaker Amp Negative Output Pin
Single-ended mode (HPBTL bit = PSEUDO bit = “0”)
Rch Headphone-Amp Negative Output Pin
19 HPR−
O
Differential mode (HPBTL bit = “1”, PSEUDO bit = “0”)
Common Output Voltage for Headphone-Amp Pin
HVCM
O
Pseudo cap-less mode (HPBTL bit = “0”, PSEUDO bit = “1”)
Speaker Amp Positive Output Pin
SPP
O
Single-ended mode (HPBTL bit = PSEUDO bit = “0”)
Rch Headphone-Amp Positive Output Pin
20 HPR+
O
Differential mode (HPBTL bit = “1”, PSEUDO bit = “0”)
This pin must be open.
TEST
O
Pseudo cap-less mode (HPBTL bit = “0”, PSEUDO bit = “1”)
21 HVDD
-
Headphone & Speaker Amp Power Supply Pin. 2.2
∼
4.0V
22 VSS2
-
Headphone & Speaker Amp Ground Pin
Rch Headphone-Amp Output Pin
HPR
O
Single-ended mode (HPBTL bit = PSEUDO bit = “0”)
Pseudo cap-less mode (HPBTL bit = “0”, PSEUDO bit = “1”)
23
Lch Headphone-Amp Negative Output Pin
O
HPL−
Differential mode (HPBTL bit = “1”, PSEUDO bit = “0”)
Lch Headphone-Amp Output Pin
HPL
O
Single-ended mode (HPBTL bit = PSEUDO bit = “0”)
24
Pseudo cap-less mode (HPBTL bit = “0”, PSEUDO bit = “1”)
Lch Headphone-Amp Positive Output Pin
HPL+
O
Differential mode (HPBTL bit = “1”, PSEUDO bit = “0”)
Mute Time Constant Control Pin
25 MUTET
O
Connected to the VSS2 pin with a capacitor for mute time constant.
Rch Line Output Pin
26 ROUT
O
This pin is internal connected to the HPR pin.
Lch Line Output Pin
27 LOUT
O
This pin is internal connected to the HPL pin.
Mono Signal Positive Input (Differential Input) or Mono Signal Input (Single-ended
28 MIN+
I
Input)
Mono Signal Negative Input (Differential Input)
29 MIN-
I
If the MIN+ pin is used as single-ended, this pin should be connected to the VSS1
with a capacitor.
No Connect Pin
30 NC
-
No internal bonding. This pin should be open or connected to the ground.
No Connect Pin
31 NC
-
No internal bonding. This pin should be open or connected to the ground.
No Connect Pin
32 NC
-
No internal bonding. This pin should be open or connected to the ground.
Note 1. All input pins must not be left floating.
Note 2. DVDD or VSS3 voltage must be input to I2C pin.
Note 3. All analog input pins (MIN+/- pins) must be supplied signal via AC-coupling capacitor.
Note 4. Analog output pins (HPL, HPR, LOUT, and ROUT pins) must deliver signal via AC-coupling capacitor except
speaker output (SPP, SPN pins) and headphone output in Differential mode (HPL+/- and HPR+/- pins) and
headphone output in Pseudo cap-less mode (HPL and HPR pins).
MS0991-E-00
-9-
2008/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
