max9789a Maxim Integrated Products, Inc., max9789a Datasheet - Page 12

• Manufacturer Part Number: max9789a
• Description: Windows Vista-compliant, Stereo Class Ab Speaker Amplifiers And Directdrive Headphone Amplifiers Integrated Products
• Manufacturer: Maxim Integrated Products, Inc.

Windows Vista-Compliant, Stereo Class AB Speaker
Amplifiers and DirectDrive Headphone Amplifiers
12
MAX9789A MAX9790A
5, 21
8, 18
______________________________________________________________________________________
10
11
12
13
14
15
16
17
19
20
22
23
24
25
26
27
28
29
30
31
32
EP
—
1
2
3
4
6
7
9
PIN
5, 21
8, 18
4, 28
1, 29
EP
—
10
11
12
13
14
15
16
17
19
20
22
23
24
25
26
27
—
30
31
32
—
2
3
6
7
9
SPKR_INR Right-Channel Speaker Amplifier Input
SPKR_INL Left-Channel Speaker Amplifier Input
LDO_OUT LDO Output. Bypass with two 1µF capacitors to GND.
LDO_SET
SPKR_EN
LDO_EN
CPGND
HP_INR
OUTR+
HP_INL
OUTL+
CPV
HPV
HP_EN
CPV
OUTR-
GAIN1
GAIN2
NAME
PGND
OUTL-
MUTE
PV
PV
BIAS
GND
C1N
HPR
N.C.
C1P
HPL
V
EP
DD
DD
SS
DD
DD
SS
Regulator Feedback Input. Connect to GND for 4.75V fixed output. Connect to a resistor-
divider for adjustable output. See Figure 1.
LDO Enable. Connect LDO_EN to V
Power Ground. Star-connect to GND.
Left-Channel Speaker Amplifier Output, Positive Phase
Left-Channel Speaker Amplifier Output, Negative Phase
Speaker Amplifier Power-Supply Input. Bypass with a 0.1µF capacitor to PGND.
Charge-Pump Power Supply. Connect a 1µF capacitor between CPV
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor between C1P
to C1N.
Charge-Pump Ground. Connect directly to PGND plane.
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor between C1P
to C1N.
Charge-Pump Output. Connect to PV
Headphone Amplifier Negative Power Supply. Connect a 1µF capacitor between PV
PGND.
Right-Channel Headphone Amplifier Output
Left-Channel Headphone Amplifier Output
Headphone Amplifier Positive Power Supply. Connect a 10µF capacitor between HPV
and PGND.
Right-Channel Speaker Amplifier Output, Negative Phase
Right-Channel Speaker Amplifier Output, Positive Phase
Active-High Headphone Amplifier Enable
Active-Low Speaker Amplifier Enable
Common-Mode Bias Voltage. Bypass with a 1µF capacitor to GND.
Active-Low Mute Enable. Mutes speaker and headphone amplifiers.
Right-Channel Headphone Amplifier Input
Left-Channel Headphone Amplifier Input
Signal Ground. Star-connect to PGND.
Positive Power Supply and LDO Input (MAX9789A). Bypass with one 0.1µF capacitor and
two 1µF capacitors to GND (MAX9789A). Bypass with one 0.1µF capacitor and one 1µF
capacitor to GND (MAX9790A).
Speaker Amplifier Gain Select 1
Speaker Amplifier Gain Select 2
No Connection. Not internally connected.
Exposed Paddle. Connect to GND.
DD
SS
to enable the LDO.
.
FUNCTION
Pin Description
DD
and PGND.
SS
DD
and