MAX9850EVKIT# Maxim Integrated, MAX9850EVKIT# Datasheet - Page 14

• Manufacturer Part Number: MAX9850EVKIT#
• Description: Audio D/A Converter ICs MAX9850 Evaluation System/Evaluation Kit
• Manufacturer: Maxim Integrated
• Series: MAX9850r

Specifications of MAX9850EVKIT#

• Resolution: 18 bit
• Interface Type: I2C
• Snr: 91 dB
• Operating Supply Voltage: 1.8 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Supply Current: 7.6 mA
• Maximum Power Dissipation: 2857 mW
• Number Of Dacs: 1
• Output Voltage: 1.95 V
• Thd Plus Noise: 87 dB

The MAX9850 EV kit features an on-board pullup resis-
tor on the MAX9850 GPIO pin. Jumper JU3 can discon-
nect this pin from the pullup resistor.
The MAX9850 EV kit provides pads and pullup resistor
placeholders that allow an alternative I
interface to be used. Connect the interface through the
SCL, SDA, and GND pads. Install pullup resistors at
positions R7 and R8, if required.
MAX9850 Evaluation System/Evaluation Kit
Table 1. JU1 Shunts Settings for I
Address (JU1)
* Default Configuration: JU1 (1-2)
Table 2. Manual Headphones Sense
Control (JU2)
* Default Configuration: JU2 (Installed)
Table 3. GPIO Pullup Register (JU3)
* Default Configuration: JU3 (1-2)
14
Not Installed
POSITION
POSITION
POSITION
Installed*
SHUNT
SHUNT
SHUNT
1-2*
1-2*
______________________________________________________________________________________
3-4
5-6
2-3
Using an Alternative I
GPIO pin pulled up to 3.3V. Monitor GPIO
signal at the GPIO pad.
GPIO pin left open. Connect a pullup resistor
to the desired voltage. Monitor GPIO signal at
the GPIO_OPEN pad.
ADDRESS
MAX9850 EVKIT headphone sense
controlled by the insertion of headphones.
MAX9850 EVKIT headphone sense switch
forced open.
MAX9850
AV
GND
SDA
PIN
DD
0010 000Y
0010 001Y
0010 011Y
DESCRIPTION
DESCRIPTION
BINARY
MAX9850 ADDRESS
GPIO Interface
HEXADECIMAL
2
2
C Interface
C-compatible
0x20h
0x22h
0x26h
2
C
If the on-board digital receiver IC is to be used with an
alternative I
between the VMOD and GND pads on the MAX9850 EV
kit. The I
The MAX9850 EV kit features a digital receiver that con-
verts readily available S/PDIF signals to the required digi-
tal audio signals needed for the MAX9850. If an
alternative digital audio interface is to be used, connect
the interface to header J10, check Disconnect Receiver.
Header pin names are clearly marked on the EV kit
silkscreen. Ensure that the command module is discon-
nected from the EV kit during this mode of operation.
While in master mode, the MAX9850 supplies the
LRCLK signal and thus controls the digital audio sam-
ple rate. To allow synchronization between the
MAX9850 and the S/PDIF sample source, the LRCLK
signal is buffered and output to a set of pads on the EV
kit. Connect the synchronization input of the S/PDIF
sample source to the LRCLK and GND pads (Figure
14). The LRCLK signal is 3.3V CMOS compatible.
Figure 14. Synchronized MAX9850 EV Kit Diagram
S/PDIF SIGNAL SOURCE
2
C address of the digital receiver is fixed at 0x28.
OUTPUT
S/PDIF
2
C interface, connect a 3.3V power supply
OPTIONAL
LRCLK
IN
Using an Alternative Digital
Synchronizing the EV Kit
OPTICAL
ELECTRICAL
GND LRCLK
MAX9850
Audio Interface
(Master Modes)
J8