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ADC122S655 Arkusz danych(PDF) 1 Page - Texas Instruments |
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ADC122S655 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 28 page 1 2 3 4 5 6 7 8 9 10 SCLK DOUT CHA - CHA+ ADC122S655 CS VREF VA CHB - CHB+ GND ADC122S655 www.ti.com SNAS445A – FEBRUARY 2008 – REVISED MARCH 2013 ADC122S655 Dual 12-Bit, 200 kSPS to 500 kSPS, Simultaneous Sampling A/D Converter Check for Samples: ADC122S655 1 FEATURES DESCRIPTION The ADC122S655 is a dual 12-bit, 200 kSPS to 500 23 • True Simultaneous Sampling Differential kSPS simultaneous sampling Analog-to-Digital (A/D) Inputs converter. The analog inputs on both channels are • Specified Performance from 200 kSPS to 500 sampled simultaneously to preserve their relative kSPS phase information to each other. The converter is based on a successive-approximation register • External Reference architecture where the differential nature of the • Wide Input Common-Mode Voltage Range analog inputs is maintained from the internal track- • Single High-Speed Serial Data Output and-hold circuits throughout the A/D converter to • Operating Temperature Range of −40°C to provide excellent common-mode signal rejection. The ADC122S655 features an external reference that can +105°C be varied from 1.0V to VA. • SPI™/ QSPI™/MICROWIRE/DSP Compatible Serial Interface The ADC122S655's serial data output is binary 2's complement and is compatible with several standards, such as SPI, QSPI, MICROWIRE, and APPLICATIONS many common DSP serial interfaces. The serial clock • Motor Control (SCLK) and chip select bar (CS) are shared by both • Power Meters/Monitors channels. • Multi-Axis Positioning Systems Operating from a single 5V analog supply and a • Instrumentation and Control Systems reference voltage of 2.5V, the total power consumption while operating at 500 kSPS is typically • Data Acquisition Systems 11 mW. With the ADC122S655 operating in power- • Medical Instruments down mode, the power consumption reduces to 3 • Direct Sensor Interface µW. The differential input, low power consumption, and small size make the ADC122S655 ideal for direct connection to sensors in motor control applications. KEY SPECIFICATIONS • Conversion Rate: 200 kSPS to 500 kSPS Operation is specified over the industrial temperature range of −40°C to +105°C and clock rates of 6.4 MHz • INL: ±1 LSB (max) to 16 MHz. The ADC122S655 is available in a 10- • DNL: ±0.95 LSB (max) lead VSSOP package. • SNR: 71 dBc (min) Connection Diagram • THD: -72 dBc (min) • ENOB: 11.25 bits (min) • Power Consumption at 500 kSPS – Converting, VA = 5V, VREF = 2.5V: 11 mW (typ) – Power-Down, VA = 5V, VREF = 2.5V: 3 µW (typ) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 SPI, QSPI are trademarks of Motorola, Incorporated. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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