ZADCS1282/1242/1222
General Documents
Brief Description
The ZMDI ZADC1282 / ZADCS1242 / ZADCS1222 are 12-Bit low power analog-to-digital (A/D) converters with up to 200ksps conversion rate. The converter is based on successive-approximation- register architecture.
All converters have an 8-channel input multiplexer and a highbandwidth a track/hold circuit. All analog inputs are software confi gurable as eight / four / two single ended or four / two / one differential analog input channels as well as for unipolar or bipolar output coding.
The ZADCS1282/ ZADCS1242 / ZADCS1222 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 ZADCS1282 / ZADCS1242 / ZADCS1222 use either the external serial-interface clock or an internally generated clock to perform successive-approximation analog-to-digital conversions. The internal clock mode can be used to run synchronous conversions on several ZMDI ADCs in parallel.
The “V” versions ZADCS1282V / ZADCS1242V / ZADCS1222V are equipped with a high 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 ZADCS1282 / ZADCS1242/ ZADCS1222. A quick turn-on time allows the device to be shut down between measurements.
Key Features
- 12-Bit resolution SAR ADC
- 2/4/8 channel single or 1/2/4 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 “V” version – ZADCS1282V/ZADCS1242V/ZADCS1222V)
- Software programmable power down mode
- Single-Supply Operation +2.5V to +5.25V
Benefits
- Scalable system solutions possible due to upward/downward compatibility within the family
- (8, 10, 12 bit resolution, 2, 4, 8 channels)
- Accurate measurements
- Long battery life cycles due to low power consumption
- Synchronous sampling with several ZADCS parts in parallel
Applications
- Embedded control & real time applications
- Industrial control & process control applications
- Motion control applications
- Three phase motor control
- Power generation (Solar, Windmills, etc.)
- Data Acquisition
- Portable Data Logging
- Battery-Powered Systems