SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface
Description
The ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS sampling Analog-to-Digital (A/D) converter that features a fully differential,
high impedance analog input and an external reference. The reference voltage can be varied from 1.0V to VA, with a corresponding resolution between 244µV and VA divided by 4096.
The output serial data is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™,
and many common DSP serial interfaces. The differential input, low power consumption, and small size make the ADC121S705 ideal
for direct connection to transducers in battery operated systems or remote data acquisition applications.
Operating from a single 5V supply, the supply current when operating at 1 MSPS is typically 2.3 mA. The supply current drops
down to 0.3 µA typically when the ADC121S705 enters power-down mode. The ADC121S705 is available in the MSOP-8 package.
Operation is guaranteed over the industrial temperature range of −40°C to +105°C and clock rates of 8 MHz to 16 MHz.
The ADC121S705EB Design Kit (consisting of the ADC121S705 Evaluation Board and the Evaluation Board Users Guide) is designed to ease evaluation and design-in of the National Semiconductor ADC121S705 12-bit Analog-to-Digital Converter, which can operate at speeds up to 1 MSPS. The evaluation board can be used in either of two modes. In the stand-alone or manual mode, suitable test equipment such as a logic analyzer can be used with the board to evaluate the ADC121S705s performance. In the computer or automatic mode, data capture and evaluation is simplified by connecting the board to National Semiconductors data capture board (order number WAVEVSN BRD 4.1). The WAVEVSN 4.1 board is connected to a personal computer through a USB port and runs Nationals WaveVision4 software.
National Semiconductor follows the provisions of the Product Stewardship Guide for Customers
(CSP-9-111C1)
and Banned Substances and Materials of Interest Specification
(CSP-9-111S2)
for regulatory environmental compliance. Details may be found at:
www.national.com/en/packaging/greennopb.html.
Lead free products are RoHS compliant.
Lead Free product status is available through the search tool located
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Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
ADC121S101
