SCANSTA476 Datasheet | National Semiconductor

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 prognostics applications. Instead of requiring an external microcontroller with a GPIO interface, the ’STA476 features a mon IEEE 1149.1 (JTAG) interface to select the analog input, initiate a measurement, and access the results - further extending the capabilities of an existing JTAG infrastructure. The SCANSTA476 uses the VREF input as a reference. This enables the SCANSTA476 to operate with a full-scale input range of 0 to VDD, 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 n n n n n n Eight selectable Analog input channels Analog full-scale input range 0V to VDD Typical accuracy of 2 m V at maximum VDD Very low power operation Small package footprint in 16-lead, 5 x 5 x 0.8 mm LLP Single +2.7V to +5.5V supply operation IEEE 1149.1 (JTAG) pliant interface Applications Measurement of Point Voltages Real-time Signal Monitoring System Health Monitoring and Prognostics Debug, Environmental Test, Production Test, Field Service n Supplement In-Circuit Tester (ICT) access n Vital in Servers, puting, Telemunication and Industrial equipment n Essential in Medical, Data Storage, and Networking equipment n n n n Block Diagram © 2005 National Semiconductor Corporation DS200835 .national. Connection Diagram DAP = GND (Top View) Pin Descriptions Pin No. ANALOG I/O 16 15 14 13 12 11 10 9 2...