The ZMDI ZADC146 and ZADC147 are 12-Bit analog-to-digital (A/D) converters with up to 200ksps conversion rate. The converter is based on successive-approximation-register architecture.
Both have an 8-channel input multiplexer and a high-bandwidth track/hold circuit. All analog inputs are software confi gurable as eight single ended or four differential analog input channels as well as for unipolar or bipolar output coding.
The ZADCS146 / ZADCS147 operate from a single +2.7V to +5.25V supply.
The synchronous four wire serial interface connects directly to a microcontroller using one of the standards like SPI™, QSPI™, and Microwire™ without external components.
The ZADCS146 / ZADCS147 use either the external serial-interface clock or an internally generated clock to perform successive-approximation analog-to-digital conversions.
The ZADC146 is equipped with an accurate internal 2.5V reference with an additional external ±1.5% voltage adjustment range.
The device provides a hard-wired shut-down pin (nSHDN) and software-selectable power-down modes to automatically shut down the IC at the end of a conversion. Accessing the serial interface automatically powers up the ZADCS146 / ZADCS147.
A quick turn-on time allows the device to be shut down between measurements.
ZADCS146 / ZADCS147 are available in a standard 20 pin SSOP
package for industrial temperature range (-25°C to +85°C).

• 12-Bit resolution SAR ADC
• 8 channel single or 4 channel differential inputs
• Software confi gurable unipolar or bipolar output code
• SPI™ / QSPI™, Microwire™ compatible serial interface
• No missing codes
• Low power consumption
• Internal 2.5V reference (only ZADCS146)
• Software programmable power down mode
• Single-Supply Operation +2.5V to +5.25V 

• Accurate measurements
• Drop-in compatible to several products on the market
• Long battery life cycles due to low power consumption 

• Embedded control & real time applications
• Industrial control & process control applications
• Motion control applications
• Data Acquisition
• Portable Data Logging
• Battery-Powered Systems