Datasheet

LTC2145-14/

LTC2144-14/LTC2143-14

21454314fa

D7 D6 D5 D4 D3 D2 D1 D0

X ILVDS2 ILVDS1 ILVDS0 TERMON OUTOFF OUTMODE1 OUTMODE0

Bit 7 Unused, Don’t Care Bit.

Bits 6-4 ILVDS2:ILVDS0 LVDS Output Current Bits

000 = 3.5mA LVDS Output Driver Current

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

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

1 = Digital Outputs Are Disabled and Have High Output Impedance

Note: If the Digital Outputs Are Disabled the Part Should Also Be Put in Sleep or Nap Mode (Both Channels).

Bits 1-0 OUTMODE1:OUTMODE0 Digital Output Mode Control Bits

00 = Full Rate CMOS Output Mode

01 = Double Data Rate LVDS Output Mode

10 = Double Data Rate CMOS Output Mode

11 = Not Used

D7 D6 D5 D4 D3 D2 D1 D0

X X OUTTEST2 OUTTEST1 OUTTEST0 ABP RAND TWOSCOMP

Bit 7-6 Unused, Don’t Care Bits.

Bits 5-3 OUTTEST2:OUTTEST0 Digital Output Test Pattern Bits

000 = Digital Output Test Patterns Off

001 = All Digital Outputs = 0

011 = All Digital Outputs = 1

101 = Checkerboard Output Pattern. OF, D13-D0 Alternate Between 1 01 0101 0101 0101 and 0 10 1010 1010 1010

111 = Alternating Output Pattern. OF, D13-D0 Alternate Between 0 00 0000 0000 0000 and 1 11 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

1 = Alternate Bit Polarity Mode On. Forces the Output Format to Be Offset Binary

Bit 1 RAND Data Output Randomizer Mode Control Bit

0 = Data Output Randomizer Mode Off

1 = Data Output Randomizer Mode On

Bit 0 TWOSCOMP Two’s Complement Mode Control Bit

0 = Offset Binary Data Format

1 = Two’s Complement Data Format

APPLICATIONS INFORMATION