MAX9765ETJ+ Maxim Integrated Products, MAX9765ETJ+ Datasheet - Page 21

• Manufacturer Part Number: MAX9765ETJ+
• Description: IC AMP AUDIO .75W STER AB 32TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class ABr

Specifications of MAX9765ETJ+

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 750mW x 2 @ 4 Ohm; 65mW x 2 @ 16 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, I²C, Input Multiplexer, Microphone, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HPS_EN = 1. A logic high selects speaker mode, a
logic low selects headphone mode. Bits 5 to 7 (MG0-2)
control the gain of the microphone amplifiers (Table 5).
In read mode (R/W = 1), the MAX9765/MAX9766 write
the contents of the selected register to the bus. The
Table 4. SHDN Register Format
*Default state.
Figure 7. Write/Read Data Format Example
BIT
7
6
5
4
3
2
1
0
REGISTER
ADDRESS
750mW Audio Amplifiers with Headphone Amp,
RESET
RESET
RESET
RESET
RESET
RESET
NAME
SHDN
X
______________________________________________________________________________________
S
S
I
I
Don’t Care
2
2
C SLAVE ADDRESS.
C SLAVE ADDRESS.
ADDRESS
SELECTS DEVICE.
ADDRESS
SELECTS DEVICE.
VALUE
7 BITS
0*
0*
0*
0*
0*
0*
0*
1
1
1
1
1
1
1
7 BITS
WR
WR
0000 0010
Microphone Preamp, and Input Mux
Read Data Format
ACK
ACK
Normal operation
DESCRIPTION
Reset device
Reset device
Reset device
Reset device
Reset device
Reset device
Shutdown
SELECTS REGISTER TO BE
REGISTER ADDRESS.
REGISTER ADDRESS.
COMMAND
COMMAND
SELECTS REGISTER
—
—
—
—
—
—
—
8 BITS
8 BITS
WRITTEN TO.
TO BE READ.
ACK
ACK
S
direction of the data flow reverses following the
address acknowledge by the MAX9765/MAX9766. The
master device reads the contents of all registers,
including the read-only status register. Table 7 shows
the status register format. Figure 7 shows an example
read data sequence.
Table 5. Control Register Format
8 BITS
DATA
BIT
REGISTER DATA.
I
7
6
5
4
3
2
1
0
2
C SLAVE ADDRESS.
SELECTS DEVICE.
ADDRESS
7 BITS
REGISTER
ADDRESS
ACK
SPKR/HP
INT/EXT
IN1/IN2
HPS_D
NAME
MG2
MG1
MG0
X
P
1
WR
ACK
Don’t Care
SELECTED REGISTER.
VALUE
0*
0*
0*
0*
8 BITS
1
1
1
1
DATA
DATA FROM
Microphone amplifier
gain set; 3-bit code sets
the gain of the
microphone amplifiers
(Table 6)
Speaker mode selected
Headphone mode
selected
Differential input selected
Single-ended input
selected
Automatic headphone
detection enabled
Automatic headphone
detection disabled
(HPS ignored)
Input 1 selected
Input 2 selected
0000 0011
P
1
DESCRIPTION
—
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