MAX9726 Maxim Integrated Products, MAX9726 Datasheet - Page 9

• Manufacturer Part Number: MAX9726
• Description: Headphone Amplifier
• Manufacturer: Maxim Integrated Products

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4
TQFN
PIN
10
11
12
13
14
15
16
17
18
19
20
EP
1
2
3
4
5
6
7
8
9
BUMP
UCSP
C3
C2
C5
C4
D5
D2
D4
D1
C1
D3
A1
A2
A3
A4
A5
B3
B4
B5
B1
B2
—
_______________________________________________________________________________________
BassMax, I
DirectDrive, Headphone Amplifier with
NAME
PGND
SHDN
SGND
NREG
OUTR
OUTL
PREG
PV
BMR
SV
C1N
SDA
BML
V
C1P
SCL
FBR
FBL
INR
INL
EP
DD
SS
SS
Power-Supply Input. Bypass V
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor between C1P
and C1N.
Power Ground. Connect to SGND.
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor between C1P
and C1N.
Charge-Pump Output. Connect to SV
Serial Data Input. Connect a pullup resistor greater than 500Ω from SDA to V
Serial Clock Input. Connect a pullup resistor greater than 500Ω from SCL to V
Active-Low Shutdown Input. Drive SHDN low to disable the MAX9726. Connect SHDN to
V
Left-Channel Feedback Output. Connect a feedback resistor between FBL and INL. See
the Gain-Setting Components section.
Left-Channel Input. Connect an input resistor to INL. See the Gain-Setting Components
section.
Right-Channel Input. Connect an input resistor to INR. See the Gain-Setting Components
section.
Right-Channel Feedback Output. Connect a feedback resistor between FBR and INR. See
the Gain-Setting Components section.
Signal Ground. Connect to PGND.
Negative Supply Regulator Voltage. Bypass NREG to PGND with a 1µF capacitor.
Right BassMax Input. Connect an external passive network between OUTR and BMR to
apply bass boost to the right-channel output. See the Gain-Setting Components section.
Connect BMR to SGND if BassMax is not used.
Headphone Amplifier Negative Power-Supply Input. Connect to PV
1µF capacitor to PGND.
Right Headphone Output
Left Headphone Output
Left BassMax Input. Connect an external passive network between OUTL and BML to
apply bass boost to the right-channel output. See the Gain-Setting Components section.
Connect BML to SGND if BassMax is not used.
Positive Supply Regulator Voltage. Bypass PREG to PGND with a 1µF capacitor.
Exposed Pad. Connect EP to SV
DD
while bit 7 is high for normal operation (see the Command Register section).
2
C, Volume and Gain Control
DD
SS
to PGND with a 1µF capacitor.
or leave unconnected.
SS
FUNCTION
and bypass with a 1µF capacitor to PGND.
Pin Description
SS
and bypass with a
DD
DD
.
.
9