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Description
The SMPS is a 1.2-A/1.25-MHz step-down converter that provides approximately 90% efficiency with a
3.6-V input voltage. Refer to the
TLV320DAC3202 product data sheet
for different input voltage options.
The three-pin jumper provides users the option to power the TLV320DAC3202 AVDD pin. The default
setting is connecting the jumper to the + and NC terminals, as illustrated in
. When the jumper is
set on the +and – terminals, the SMPS input is supplied from an external power source such as a battery.
2.2
Bottom Side Components
The bottom side of the EVM contains a pair of low-dropout regulators (LDOs) to power a
USB
streaming controller. The bottom side also features a 6-MHz oscillator, a 256k EEPROM, a 3.5-mm audio
jack, and two level shifters, one each for the I
2
C and I
2
S interfaces.
shows the bottom side of the
EVM.
Figure 2. TLV320DAC3202EVM: Bottom Side
The EEPROM stores the firmware needed to boot up the USB controller when the EVM is connected to a
PC. The 3.5-mm audio jack allows a headphone connection for listening tests, or for performance testing
by connecting a cable to an audio instrument such as an Audio Precision
®
analyzer.
3
SLAU327 – October 2010
TLV320DAC3202EVM
Copyright © 2010, Texas Instruments Incorporated
