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SCANSTA476 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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SCANSTA476 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 7 page  SCANSTA476 Eight Input IEEE 1149.1 Analog Voltage Monitor General Description The SCANSTA476 is a low power, Analog Voltage Monitor used for sampling or monitoring up to 8 analog/mixed-signal input channels. Analog Voltage Monitors are valuable during product development, environmental test, production, and field service for verifying and monitoring power supply and reference voltages. In a supervisory role, the ’STA476 is useful for card or system-level health monitoring and prog- nostics applications. Instead of requiring an external microcontroller with a GPIO interface, the ’STA476 features a common IEEE 1149.1 (JTAG) interface to select the analog input, initiate a mea- surement, and access the results - further extending the capabilities of an existing JTAG infrastructure. The SCANSTA476 uses the V REF input as a reference. This enables the SCANSTA476 to operate with a full-scale input range of 0 to V DD, which can range from +2.7V to +5.5V. The SCANSTA476 is packaged in a 16-lead non-pullback LLP package that provides an extremely small footprint for applications where space is a critical consideration. This product operates over the industrial temperature range of −40˚C to +85˚C. Features n Eight selectable Analog input channels n Analog full-scale input range 0V to V DD n Typical accuracy of 2 mV at maximum V DD n Very low power operation n Small package footprint in 16-lead,5x5x0.8 mm LLP n Single +2.7V to +5.5V supply operation n IEEE 1149.1 (JTAG) compliant interface Applications n Measurement of Point Voltages n Real-time Signal Monitoring n System Health Monitoring and Prognostics n Debug, Environmental Test, Production Test, Field Service n Supplement In-Circuit Tester (ICT) access n Vital in Servers, Computing, Telecommunication and Industrial equipment n Essential in Medical, Data Storage, and Networking equipment Block Diagram 20083521 April 2005 © 2005 National Semiconductor Corporation DS200835 www.national.com |
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