Features
 16 or 8-channel 12-Bit SAR ADC
− Supporting Ranges from 0 to 2.5 V and 0 to 5
V
− Programmable Out-of-Range Alarms
− 1-MHz Sample Rate Serial Devices
 General Purpose I/O Ports (GPIOs)
 Low-Power SPI-Compatible Serial Interface
 Operating Temperature: −40°C to 125°C

Applications
 Wireless Infrastructure
 PLC / DCS
 Battery Powered Systems
 General Purpose Monitor and Control

Description
The TPC5120/TPC5121 products include capacitorbased SAR A/D converters with inherent sample and
hold. The TPC5120 has 16-channel single-ended
inputs and the TPC5121 has 8-channel single-ended
inputs.
The devices accept a wide analog supply range from
2.7 V to 5.25 V. The ultra-low power consumption
makes these devices suitable for battery-powered
and isolated power-supply applications.
A wide 1.7-V to 5.25-V I/O supply range facilitates a
glueless interface with the most used digital hosts.
The serial interface is controlled by ̅CS̅̅̅ and SCLK
for easy connection with microprocessors and DSP.
The input signal is sampled with the falling edge of
̅CS̅̅̅. It uses SCLK for conversion, serial data output,
and reading serial data in. The devices allow auto
sequencing of preselected channels or manual
selection of a channel for the next conversion cycle.
There are two software selectable input ranges (0 V
to VREF and 0 V to 2 × VREF), individually
configurable GPIOs (four in case of the TSSOP and
one on the VQFN package devices), and two
programmable alarm thresholds per channel. These
features make the devices suitable for most data
acquisition applications.
The devices offer an attractive power-down feature.
This is extremely useful for power saving when the
device is operated at lower conversion speeds.