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TSA7887ARZ-REEL Scheda tecnica(PDF) 1 Page - Silicon Laboratories |
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TSA7887ARZ-REEL Scheda tecnica(HTML) 1 Page - Silicon Laboratories |
1 / 21 page TSA7887 Page 1 © 2014 Silicon Laboratories, Inc. All rights reserved. FEATURES Alternate Source for AD7887 Single-supply Operation: +2.7V to +5.25V INL: ±1LSB - TSA7887B ±2LSBs - TSA7887A One or Two Single-ended Analog Inputs Internal Wide-bandwidth Track-and-Hold Internal +2.5-V Reference Flexible Power/Throughput-Rate Management 0.85mA at 125ksps (Internal VREF ON) 0.7mA at 125ksps (Internal VREF OFF) Shutdown-mode Supply Current: 1 μA (max) SPI®/QSPI™/MICROWIRE™/DSP-Compatible Serial Interfaces1 Operating Temperature Range: -40ºC to +125ºC 8-pin SOIC and MSOP Packaging APPLICATIONS Instrumentation and Control Systems High-Speed Modems Battery-powered systems: Personal Digital Assistants, Medical Instruments, Mobile Communications 1 SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corporation DESCRIPTION The TSA7887 – an alternate source for the AD7887 - is a self-contained, 2-channel, high-speed, micropower, 12-bit analog-to-digital converter (ADC) that operates from a single +2.7V to +5.25V power supply. The TSA7887 is capable of a 125-ksps throughput rate with an external 2MHz serial clock and draws 0.85mA supply current. The wideband input track-and-hold acquires signals in 500ns and features a single-ended sampling topology. Output data coding is straight binary and the ADC is capable of converting full power signals up to 2.5 MHz. The ADC also contains an integrated 2.5V reference or the VREF pin can be overdriven by an external reference. The TSA7887’s provides one or two analog inputs each with an analog input range from 0 to VREF. In two-channel operation, the analog input range is 0V to VDD. Efficient circuit design ensures low power consumption of 2mW (typical) for normal operation and 3 μW in power-down operation. The TSA7887 is fully specified from -40ºC to +125ºC and is available in 8-pin SOIC and MSOP packages. A Micropower, 2-channel, 125-ksps, Serial-Output 12-bit SAR ADC FUNCTIONAL BLOCK DIAGRAM |
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