MAX9760EVSYS Maxim Integrated, MAX9760EVSYS Datasheet - Page 6

• Manufacturer Part Number: MAX9760EVSYS
• Description: Amplifier IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX9760, MAX9761, MAX9762, MAX9763r

3) Calculate and install components R
where:
A
A
f
Jumper JU5 controls the shutdown function of the
MAX9761. Removing the shunt from JU5 allows the
shutdown function to be controlled by an external sig-
nal source connected to the SHDN pad. See Table 4
for shutdown shunt positions.
Jumper JU1 controls the gain selection of the
MAX9761. The gain selection function can be set to
select gain A or gain B. Alternatively, the gain selection
can be controlled by an external signal source through
the GAINA/B pad. Gain selection can also be con-
trolled by the headphone sense pin, which enables
automatic gain selection. See Table 5 for gain selection
shunt positions.
Jumper JU4 controls the HPS_EN pin of the MAX9761.
Alternatively, the shunt can be removed from JU4 and
the HPS_EN pin can be driven by an external signal
source connected to the HPS_EN pad. The HPS_EN
pin in conjunction with the HPS pin determines the out-
put mode of the MAX9761. Refer to the MAX9760–
MAX9763 data sheet for more details. See Table 6 for
headphone sense enable shunt positions.
Jumper JU3 controls the Mute function of the
MAX9761. Alternatively, the shunt can be removed from
JU3 allowing the mute function to be driven by an
MAX9760/MAX9761 Evaluation
System/Evaluation Kit
6
c
1
2
= center frequency (Hz).
= bass-boosted gain (dB)
= nonbass-boosted gain (dB)
C
_______________________________________________________________________________________
8
using equations 1, 2, and 3.
MAX9761 Headphone Sense Enable
R
9
C
=
R
7
R
Evaluating the MAX9761
7
10
=
=
MAX9761 Shutdown Control
C
R
=
8
8
R
R
=
MAX9761 Gain Selection
=
7
7
10
−
2
MAX9761 Mute Control
×




π
10
10
20
f
A
C
1
A
A
×
20
20
R
2
2
15
1
7
×
×
k
15
15
×
Ω
R
k
k
9
Ω
Ω
7




–R
10
, C
(Eq1)
(Eq2)
(Eq3)
7
, and
external signal source connected to the MUTE pad.
See Table 7 for mute shunt positions.
Figure 4. The Bass-Boost Components Create an Output
Magnitude Response Similar to the Diagram Shown Above
Table 2. MAX9760 Shutdown Selection
*Default configuration.
Table 3. MAX9760 Manual Headphone
Sense Control
*Default configuration.
Table 4. MAX9761 Shutdown Selection
*Default configuration.
JUMPER
JUMPER
JUMPER
JU5
JU6
JU5
A
1
+ A
2
A
A
2
1
2
OUTPUT MAGNITUDE (dB)
Not installed
Not installed
POSITION
POSITION
POSITION
Installed*
SHUNT
SHUNT
SHUNT
1–2*
1–2*
2–3
2–3
f
C
MAX9760 enabled
MAX9760 shut down
MAX9760 EV kit headphone
sense controlled by the insertion
of headphones
MAX9760 EV kit headphone
sense switch forced open
MAX9761 enabled
MAX9761 shutdown
SHDN function controlled by an
external signal source
DESCRIPTION
DESCRIPTION
DESCRIPTION
FREQUENCY (Hz)