MAX9760EVKIT Maxim Integrated, MAX9760EVKIT Datasheet - Page 7

• Manufacturer Part Number: MAX9760EVKIT
• Description: Amplifier IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX9760, MAX9761, MAX9762, MAX9763r

Table 5. MAX9761 Gain Selection
*Default configuration.
Table 6. MAX9761 Headphone Sense
Enable Selection
*Default configuration.
Table 7. MAX9761 Mute Control
*Default configuration.
Table 8. MAX9761 Input Selection
*Default configuration.
JUMPER
JUMPER
JUMPER
JUMPER
JU1
JU4
JU3
JU2
POSITION
Not installed
Not installed
Not installed
POSITION
POSITION
POSITION
SHUNT
11–12
SHUNT
SHUNT
SHUNT
9–10
1–2*
3–4
5–6
7–8
2–3*
2–3*
1–2*
1–2
1–2
2–3
_______________________________________________________________________________________
GAINA/B PIN
GAINA/B pad
Input 2 selected
Input 1 selected
Input selection controlled by an
external signal source
HPS pin of
Output disabled
Output enabled
Mute function controlled by an
external signal source
HPS_EN pin tied high
HPS_EN pin tied low
HPS_EN pin controlled by an
external signal source
MAX9761
MAX9761
DGND
VDD
SDA
SCL
DESCRIPTION
DESCRIPTION
DESCRIPTION
Gain B selected
Not valid
Gain A selected
Not valid
Gain selection
controlled by an
external signal
source
Automatic gain
selection mode
DESCRIPTION
MAX9760/MAX9761 Evaluation
Jumper JU2 controls the input selection function of the
MAX9761. Alternatively, the shunt can be removed from
JU2 allowing the input selection function to be driven
by an external signal source connected to the IN1/2
pad. See Table 8 for input selection shunt positions.
The MAX9760 EV kit is also capable of evaluating the
SMBus/I
MAX9763. To evaluate the MAX9762 or MAX9763 mono
speaker/headphone driver, follow the directions given
below.
When evaluating the MAX9763, ensure that the
MAX9760 EV kit is not connected to the MAXSMBUS
board, as undesirable device operation may occur.
The MAX9760 EV kit must be modified to evaluate the
MAX9762 or MAX9763 mono speaker/headphone driver:
1) Replace the MAX9760 with MAX9762 or MAX9763.
2) Cut the trace between pins 2 and 3 of jumper JU7.
3) Install a 3-pin header into the location designated
4) Install a shunt on pins 1–2 of jumper JU7.
The mono speaker output is accessed through the ter-
minal block designated TB2.
The MAX9762 can be controlled with the provided
MAX9760 EV kit software. Unlike the MAX9760, the
MAX9762 and MAX9763 have an additional gain for the
mono speaker. The feedback network that controls the
mono gain is composed of components R18 and C16. If
the output is forced into speaker mode (BTL), the mono
gain is selected regardless of the A/B gain. If the output is
forced into headphone mode (single ended), the output
gain is either A or B. Refer to the MAX9760–MAX9763
data sheet for more details.
System/Evaluation Kit
by JU7.
2
Software Control and Gain Selection
C-compatible MAX9762 and the parallel-drive
Evaluating the MAX9762 and
MAX9761 Input Selection
Hardware Setup
MAX9763
7