SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface
Description
The ADC141S626 is a 14-bit, 50 kSPS to 250 kSPS sampling Analog-to-Digital (A/D) converter. The converter is based on a successive-approximation
register (SAR) architecture where the differential nature of the analog inputs is maintained from the internal sample-and-hold
circuits throughout the A/D converter to provide excellent common-mode signal rejection. The
ADC141S626 features an external reference that can be varied from 1.0V to VA. It also features a zero-power track mode where the ADC is consuming the minimum amount of supply current while the internal
sampling capacitor is tracking the applied analog input voltage.
The serial data output is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™,
and many common DSP serial interfaces. The conversion result is clocked out by the serial clock input and is the result of
the conversion currently in progress; thus,
ADC141S626 has no latency.
The ADC141S626 may be operated with independent analog (VA) and digital input/output (VIO) supplies. VA and VIO can range from 2.7V to 5.5V and can be set independent of each other. This allows a user to maximize performance and minimize
power consumption by operating the analog portion of the ADC at a VA of 5V while communicating with a 3V controller on the digital side. With a 3V source, the power consumption when operating
at 200 kSPS is 2.0 mW. With a 5V source, the power consumption when operating at 250 kSPS is 4.8 mW. The power consumption
drops down to 4 µW and 13 µW respectively when the ADC141S626 enters acquisition (power-down) mode. The differential input,
low power consumption, and small size make the ADC141S626 ideal for direct connection to bridge sensors and transducers in
battery operated systems or remote data acquisition applications.
Operation is guaranteed over the temperature range of
−40°C to +85°C and clock rates of 0.9 MHz to 4.5 MHz. The
ADC141S626 is available in a 10-lead MSOP package.
The ADC141S626EB features a 14-bit, 50kSPS to 250kSPS differential input Analog-to-Digital (A/D) converter. The ADC141S626EB can be used in manual or computer mode. In manual mode, a pattern generator or controller is used to interface with the ADC141S626. In order to interface this board to a PC, a WaveVision (WV) Data Capture Board, version 4.1 or higher, is required. The WV Data Capture Board requires WaveVision software version 4.4 or higher for the ADC141S626EB to be recognized automatically by the WV software.
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