ADC122S625
ADC122S625 is Simultaneous Sampling A/D Converter manufactured by Texas Instruments.
FEATURES
- 23 True Simultaneous Sampling Differential Inputs
- Specified Performance from 50 k SPS to 200 k SPS
- External Reference
- Wide Input mon-Mode Voltage Range
- Single High-Speed Serial Data Output
- Operating Temperature Range of
- 40°C to
+105°C
- SPI™/ QSPI™/MICROWIRE/DSP patible
Serial Interface
APPLICATIONS
- Motor Control
- Power Meters/Monitors
- Multi-Axis Positioning Systems
- Instrumentation and Control Systems
- Data Acquisition Systems
- Medical Instruments
- Direct Sensor Interface
KEY SPECIFICATIONS
- Conversion Rate: 50 k SPS to 200 k SPS
- INL: ±1 LSB (max)
- DNL: ±0.95 LSB (max)
- SNR: 71 d Bc (min)
- THD: -72 d Bc (min)
- ENOB: 11.25 bits (min)
- Power Consumption at 200 k SPS
- Converting, VA = 5V, VREF = 2.5V: 8.6 m W (typ)
- Power-Down, VA = 5V, VREF = 2.5V: 2.6 µW (typ)
DESCRIPTION
The ADC122S625 is a dual 12-bit, 50 k SPS to 200 k SPS simultaneous sampling Analog-to-Digital (A/D) converter. The analog inputs on both channels are sampled simultaneously to preserve their relative phase information to each other. The converter is based on a successive-approximation register architecture where the differential nature of the analog inputs is maintained from the internal trackand-hold circuits throughout the A/D converter to provide excellent mon-mode signal rejection. The ADC122S625 features an external reference that can be varied from 1.0V to VA.
The ADC122S625's serial data output is binary 2's plement and is patible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many mon DSP serial interfaces. The serial clock (SCLK) and chip select bar (CS) are shared by both channels.
Operating from a single 5V analog supply and a reference voltage of 2.5V, the total power consumption while operating at 200 k SPS is typically 8.6 m W. With the ADC122S625 operating in powerdown mode, the power consumption reduces to 2.6 µW. The differential input, low power consumption, and small size make the ADC122S625 ideal for direct connection to sensors in...
