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ADS-916MM Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
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ADS-916MM Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
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5 / 8 page  ® ® ADS-916 5 THERMAL REQUIREMENTS All DATEL sampling A/D converters are fully characterized and specified over operating temperature (case) ranges of 0 to +70°C and –55 to +125°C. All room-temperature (TA = +25°C) production testing is performed without the use of heat sinks or forced-air cooling. Thermal impedance figures for each device are listed in their respective specification tables. These devices do not normally require heat sinks, however, standard precautionary design and layout procedures should be used to ensure devices do not overheat. The ground and power planes beneath the package, as well as all pcb signal runs to and from the device, should be as heavy as possible to help conduct heat away from the package. Electrically-insulating, thermally-conductive "pads" may be installed underneath the package. Devices should be soldered to boards rather than "socketed", and of course, minimal air flow over the surface can greatly help reduce the package temperature. In more severe ambient conditions, the package/junction temperature of a given device can be reduced dramatically (typically 35%) by using one of DATEL's HS Series heat sinks. See Ordering Information for the assigned part number. See page 1-183 of the DATEL Data Acquisition Components Catalog for more information on the HS Series. Request DATEL Application Note AN-8, "Heat Sinks for DIP Data Converters", or contact DATEL directly, for additional information. Figure 4. ADS-916 Timing Diagram Notes: 1. fs = 500kHz. 2. The ADS-916 is an edge-triggered device. All internal operations are triggered by the rising edge of the start convert pulse, which may be as narrow as 50nsec. All production testing is performed at a 500kHz sampling rate with 200nsec wide start pulses. For lower sampling rates, wider start pulses may be used, however, a minimum pulse width low of 50nsec must be maintained. START CONVERT OUTPUT DATA INTERNAL S/H N Data (N – 1) Valid 200ns typ. Acquisition Time 10ns typ. Data N Valid (1926ns min.) EOC 90ns typ. Conversion Time 420ns ±20ns Invalid Data 74ns max. 70ns ±10ns 1570ns ±40ns 430ns typ. 35ns max. Hold N + 1 |
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