LTC2323-16 PIN FUNCTIONSVBYP2 (Pin 24): Bypass this internally supplied pin to REFRTN2 (Pin 27): Reference Buffer 2 Output Return. ground with a 1µF ceramic capacitor. The nominal output Bypass REFRTN2 to REFOUT2. Do not tie the REFRTN2 voltage on this pin is 1.6V pin to the ground plane. CMOS/LVDS (Pin 25): I/O Mode Select. Ground this pin REFINT (Pin 28): Reference Buffer Output Enable. Tie to to enable CMOS mode, tie to OVDD to enable LVDS mode. VDD when using the internal reference. Tie to ground to Float this pin to enable low power LVDS mode. disable the internal REFOUT1 and REFOUT2 buffers for REFOUT2 (Pin 26): Reference Buffer 2 Output. An onboard use with external voltage references. This pin has a 500k buffer nominally outputs 4.096V to this pin. This pin is internal pull-up to VDD. referred to REFRTN2 and should be decoupled closely to Exposed Pad (Pin 29): Ground. Solder this pad to ground. the pin (no vias) with a 0.1µF (X7R, 0402 size) capacitor and a 10μF (X5R, 0805 size) ceramic capacitor in paral- lel. The internal buffer driving this pin may be disabled by grounding the REFINT pin. If the buffer is disabled, an external reference may drive this pin in the range of 1.25V to VDD. 232316fc For more information www.linear.com/LTC2323-16 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Digital Inputs And Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Package Description Related Parts
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