LTC2107 applications inFormation REGISTER A4: OUTPUT MODE REGISTER (ADDRESS 04h) D7 D6 D5 D4 D3 D2 D1 D0 X ILVDS2 ILVDS1 ILVDS0 TERMON OUTOFF X LVDS Bit 7 Unused Bit. Read back as 0. Bits 6-4 ILVDS2:ILVDS0 LVDS Output Current Control Bits 000 = 3.5mA LVDS Output Driver Current. Default value at start-up. 001 = 4.0mA LVDS Output Driver Current. 010 = 4.5mA LVDS Output Driver Current. 011 = Not Used. 100 = 3.0mA LVDS Output Driver Current. 101 = 2.5mA LVDS Output Driver Current. 110 = 2.1mA LVDS Output Driver Current. 111 = 1.75mA LVDS Output Driver Current. Bit 3 TERMON LVDS Internal Termination Bit 0 = Internal Termination Off. Default value at start-up. 1 = Internal Termination On. LVDS output driver current is 2× the current set by ILVDS2:ILVDS0 Bit 2 OUTOFF Output Disable Bit 0 = Digital Outputs are Enabled. Default value at start-up. 1 = Digital Outputs are Disabled and Have High Output Impedance. Bit 1 Unused Bit. Read back as 0. Bit 0 LVDS Digital Output Mode Control Bit 0 = Double Data Rate LVDS Output Mode. Default value at start-up. 1 = Full-Rate CMOS Output Mode. REGISTER A5: DATA FORMAT REGISTER (ADDRESS 05h) D7 D6 D5 D4 D3 D2 D1 D0 X X OUTTEST2 OUTTEST1 OUTTEST0 ABP RAND TWOSCOMP Bits 7-6 Unused Bits. Read back as 0. Bits 5-3 OUTTEST2:OUTTEST0 Digital Output Test Pattern Bits 000 = Digital Output Test Patterns Off. Default value at start-up. 001 = All Digital Outputs = 0. 011 = All Digital Outputs = 1. 101 = Checkerboard Output Pattern. OF, D15-D0 alternate between 10101 0101 0101 0101 and 01010 1010 1010 1010. 111 = Alternating Output Pattern. OF, D15-D0 alternate between 00000 0000 0000 0000 and 11111 1111 1111 1111. Note: Other bit combinations are not used Bit 2 ABP Alternate Bit Polarity Mode Control Bit 0 = Alternate Bit Polarity Mode Off. Default value at start-up. 1 = Alternate Bit Polarity Mode On. Bit 1 RAND Data Output Randomizer Mode Control Bit 0 = Data Output Randomizer Mode Off. Default value at start-up. 1 = Data Output Randomizer Mode On. Bits 0 TWOSCOMP Two’s Complement Mode Control Bit 0 = Offset Binary Data Format. Default value at start-up. 1 = Two’s Complement Data Format. 2107fb For more information www.linear.com/LTC2107 29 Document Outline Features Applications Description Block Diagram Absolute Maximum Ratings Pin Configuration Order Information Converter Characteristics Analog Input Dynamic Accuracy VCM Output Digital Inputs and OUtputs Power Requirements Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Typical Application Related Parts
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