MAX9750AEVKIT Maxim Integrated, MAX9750AEVKIT Datasheet - Page 4

• Manufacturer Part Number: MAX9750AEVKIT
• Description: Amplifier IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX9750, MAX9751, MAX9755r

When evaluating the MAX9751, jumper JU3 provides
an option to select between two stereo input sources.
See Table 6 for shunt positions.
Jumper JU4 selects between the analog volume control
(VOL) for the MAX9750A/B/C or the second right input
channel (INR2) for the MAX9751. See Table 7 for shunt
positions.
To evaluate the MAX9755, replace the MAX9750A with
the MAX9755. The MAX9755’s audio input signals INL
and INR are connected to the PC_BEEP and INRB
pads on the EV kit, respectively. To utilize the PC_BEEP
and INRB pads for audio input signals, replace resistor
MAX9750A Evaluation Kit
Table 6. JU3 Jumper Selection
*Replace R1 with a 0Ω resistor, and install shunts on pins 1 and 2 of jumper JU4.
Table 7. JU4 Jumper Selection
Table 8. JU2 Jumper Selection
Table 9. JU3 Jumper Selection
4
SHUNT POSITION
1-2 (not allowed)
SHUNT POSITION
2-3 (required)
POSITION
_______________________________________________________________________________________
SHUNT
SHUNT POSITION
1-2
2-3
MAX9751 Second Right Input Channel (INR2)
1-2
2-3
1-2
2-3
Connected to GND
Connected to VDD
AC coupled to the
INRB pad on the
EV kit
Not allowed when
evaluating the
MAX9751
MAX9755 PIN 23
MAX9751 PIN 28
MAX9751 PIN 23 (IN1/2)
(not allowed)
MAX9751 Stereo Input Selection
Connected to GND
Connected to VDD
(GND)
(INR2)
Evaluating the MAX9755
Connected to GND
Connected to VDD
MAX9751’s second
right input channel
is selected
See the Jumper
Selection section
Not functional
Normal operation
PIN 24 (GAIN)
EV KIT FUNCTION
EV KIT FUNCTION
MAX9755
The stereo source that is connected to the IN_L and IN_R pads is selected
The stereo source that is connected to the PC_BEEP and INRB pads* is selected
SPEAKER MODE GAIN, JU5
R1 with a 0Ω resistor and install a shunt on pins 1 and 2
of jumper JU4. Install a shunt on pins 2 and 3 of jumper
JU3. The speaker and headphone amplifier gains are
set by jumper JU2. Refer to the MAX9755 IC data sheet
for the correct pinout.
The speaker and headphone outputs on the EV kit can
be selected by jumper JU5 and the headphone jack J1.
See Table 4 in the Jumper Selection section.
When evaluating the MAX9755, jumper JU2 provides
an option to set the gain of the speakers and head-
phone amplifiers of the EV kit. See Table 8 for shunt
positions.
When evaluating the MAX9755, install a shunt across
pins 2 and 3 on jumper JU3 (see Table 9).
Jumper JU4 selects between the analog volume control
(VOL) for the MAX9750A/B/C or the right input channel
(INR) for the MAX9755. See Table 10 for shunt positions.
Table 10. JU4 Jumper Selection
POSITION
STEREO INPUT SOURCE SELECTED
SHUNT
INSTALLED (dB)
1-2
2-3
10.5
9
AC coupled to the INRB
pad on the EV kit
Not allowed when
evaluating the MAX9755
MAX9755 PIN 28 (INR)
MAX9755 Right Input Channel (INR)
HEADPHONE MODE GAIN,
MAX9755 Gain Selection
JU5 NOT INSTALLED (dB)
MAX9755 Jumper JU3
MAX9755‘s right
input channel is
selected
See the Jumper
Selection section
EV KIT FUNCTION
0
3