MAX9719AEVKIT Maxim Integrated, MAX9719AEVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX9719AEVKIT
• Description: Audio Amplifiers Programmers, Development Systems
• Manufacturer: Maxim Integrated

Specifications of MAX9719AEVKIT

• Product: Class-AB
• Output Type: 2-Channel Stereo
• Output Power: 1.4 W
• Thd Plus Noise: 0.00%
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 5 mA
• Maximum Power Dissipation: 1349 mW
• Common Mode Rejection Ratio (min): - 60 dB
• Input Signal Type: Differential
• Factory Pack Quantity: 1
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.7 V

5) Connect the positive terminal of the power supply to
6) Connect the first output of the stereo audio source
7) Connect the second output of the stereo audio
8) Turn on the power supply.
9) Turn on the audio source.
The MAX9719A EV kit features the MAX9719A stereo
differential audio amplifier, designed to drive a pair of
8Ω speakers in portable audio applications. The EV kit
operates from a DC power supply that can provide
2.7V to 5.5V and 3A of current.
As configured, the EV kit is set for a gain of 1V/V (0dB) by
gain-setting resistors R1–R8. To set the EV kit to a differ-
ent gain, select other gain-setting resistors. Refer to the
Applications Information section in the MAX9718/
MAX9719 data sheet for selecting the resistors.
Capacitors C9–C12 are used for optionally limiting the
audio signal bandwidth.
The MAX9719A features a shutdown mode that
reduces the MAX9719A quiescent current to 100nA
(typ). Jumper JU5 controls the shutdown pin (SHDN) of
the MAX9719A IC. See Table 1 for shunt positions.
MAX9719A Evaluation Kit
Table 3. Component Values for Evaluating Different Versions of the MAX9719
2
the VCC pad and the power-supply ground terminal
to the GND pad.
across the INPUTR+ and INPUTR- pads.
source across the INPUTL+ and INPUTL- pads.
_______________________________________________________________________________________
R1, R3, R5, R7
R2, R4, R6, R8
COMPONENT
U1
Detailed Description
EVALUATING THE
Shutdown Mode (
MAX9719A
MAX9719A
Jumper Selection
10kΩ
10kΩ
SHDN )
EVALUATING THE
MAX9719B
MAX9719B
OPEN
0Ω
Jumpers JU1–JU4 provide an option to bypass the
input-signal coupling capacitors C1–C4, respectively,
on the MAX9719A EV kit. See Table 2 for the various
shunt positions. Refer to the Input Filter section of the
MAX9718/MAX9719 data sheet
The MAX9719A EV kit can evaluate the MAX9719B,
MAX9719C, and MAX9719D. To evaluate a different IC,
replace U1 with the desired part, and replace the compo-
nents as outlined in Table 3. Refer to the MAX9718/
MAX9719 data sheet for additional information.
Table 1. JU5 Jumper Selection
Table 2. JU1–JU4 Jumper Selection
1-2 (SHDN = high)
2-3 (SHDN = low)
None. External logic
connected to SHDN pad.
Not Installed (default)
Bypassing the Input-Signal Coupling Capacitors
SHUNT POSITION
SHUNT POSITION
Evaluating MAX9719B/MAX9719C/MAX9719D
Installed
EVALUATING THE
MAX9719C
MAX9719C
OPEN
0Ω
In circuit
DC-coupled inputs
INPUT-SIGNAL COUPLING
EV kit enabled
Shutdown mode
SHDN driven by external
logic. Shutdown is active low.
EV KIT FUNCTION
CAPACITORS
EVALUATING THE
MAX9719D
MAX9719D
OPEN
0Ω
(C1–C4)