2 Introduction
The PCM1802EVM and PCM1803AEVM are evaluation modules (EVMs) designed to demonstrate the
performance and functionality of the PCM1802 and PCM1803A devices, respectively. Although the populated
components differ between the two device variants, the PCM1802EVM and PCM1803AEVM use the same
hardware and printed circuit board (PCB) layout. The variants are differentiated by the label at the top of
the PCB, and by the variant name, DC167-001 (PCM1802EVM) and DC167-002 (PCM1803AEVM), within the
manufacturing files.
Both the PCM1802 and PCM1803A are high-performance, low-cost, single-chip, stereo analog-to-digital
converters (ADCs) with single-ended analog voltage inputs. The devices are configured through logic-level
mode selection pins and do not require a digital interface such as I
2
C or SPI to configure registers. As such, no
software is necessary to interface with the EVMs. The EVMs are powered with a single 5-V supply. Access to the
converter output is provided on the audio serial interface in I
2
S, right-justified (RJ), and left-justified (LJ) formats.
3 Power Supply
The PCM1802EVM and PCM1803AEVM are powered with a single 5-V power supply connected to J17. An
onboard low-dropout regulator converts the 5-V supply to the 3.3-V rail used by the ADC. The analog supply,
VCC, is fixed at 5 V and the digital supply, VDD, is fixed at 3.3 V. The power status of the EVM is indicated by
LED (D1), which illuminates when power is applied to the board.
J1 (VCC, 5 V) and J2 (VDD, 3.3 V) are jumper wires that can be used to disconnect the voltage supply
pins (VCC and VDD) of the device from the supply nets (5 V and 3.3 V). This process is done by cutting or
unsoldering the wire. These disconnections can help measure the power consumption of each voltage rail using
an ammeter or digital multimeter (DMM).
Introduction
2
PCM1802EVM and PCM1803AEVM Evaluation Module
SBAU384 – JULY 2021
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