ZADCS146_11 Datasheet, PDF (2/26 Pages) List of Unclassifed Manufacturers – 12-Bit, 200ksps, ADC Family

ZADCS146/147
12-Bit, 200ksps, ADC Family
Brief Description
The ZMDI ZADCS146 and ZADCS147 are 12-Bit
low power analog-to-digital (A/D) converters with
up to 250ksps conversion rate. The converter is
based on successive-approximation-register
architecture.
All converters have an 8-channel input multiplexer
and a high-bandwidth a track/hold circuit. All
analog inputs are software configurable as eight /
four/two single ended or four/two/one differential
analog input channels as well as for unipolar or
bipolar output coding.
The ZADCS146 and 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 and ZADCS147 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 ZADCS 146 is 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 ZADCS146 and
ZADCS147. A quick turn-on time allows the device
to be shut down between measurements.
Features
 12-Bit resolution SAR ADC
 8 channel single or 4 channel diff. inputs
 Software configurable uni- 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

Benefits
 Accurate measurements
 Long battery life cycles due to low power
consumption
Available Support
 ZADCS146 Kit
- Evaluation Kit for ZADCS146 and ZADCS147
based on ZADCS146 device
- Standalone and PC based operation modus
- USB 2.0 (1.1) compatible
- User Interface for PC operated modus
- Graphical oscilloscope appl. and FFT analyzer
Physical Characteristics
 ADC resolution............................ 12 Bit
 Conversion rate........................... 200 ksps
 Power supply rate ....................... 2.7V to 5.25V
 INL............................................... ±1.0 LSB max.
 DNL ............................................. ±1.0 LSB max.
 SINAD ......................................... >70 dB
 Standby (idle) current.................. <0.5 µA
 Current consumption @ 200 ksps, 3V supply
- with internal reference .............. < 1.2 mA
- without internal reference ......... < 0.9 mA
 Temperature range ..................... -25°C to +85°C
 20-Pin SSOP package
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 2.0
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