Datasheet
29
90067814f
LTM9008-14/
LTM9007-14/LTM9006-14
APPLICATIONS INFORMATION
REGISTER A1 (CSB): FORMAT AND POWER-DOWN REGISTER (ADDRESS 01h with CSB = GND)
D7 D6 D5 D4 D3 D2 D1 D0
DCSOFF RAND TWOSCOMP SLEEP NAP_7 NAP_6 NAP_3 NAP_2
Note That CSA Controls Channels 1, 4, 5 and 8, CSB Controls Channels 2, 3, 6 and 7.
Bit 7 DCSOFF Clock Duty Cycle Stabilizer Bit
0 = Clock Duty Cycle Stabilizer On
1 = Clock Duty Cycle Stabilizer Off. This Is Not Recommended.
Bit 6 RAND Data Output
Randomizer Mode Control Bit
0 = Data Output Randomizer Mode Off
1 = Data Output Randomizer Mode On
Bit 5 TWOSCOMP Tw o’s Complement Mode Control Bit
0 = Offset Binary Data Format
1 = Tw o’s Complement Data Format
Bits 4-0 SLEEP: NAP_4:NAP_1 Sleep/Nap Mode Control Bits
00000 = Normal Operation
0XXX1 = Channel 2 in Nap Mode
0XX1X = Channel 3 in Nap Mode
0X1XX = Channel 6 in Nap Mode
01XXX = Channel 7
in Nap Mode
1XXXX = Sleep Mode. Channels 2, 3, 6 and 7 Are Disabled
Note: Any Combination of Channels Can Be Placed in Nap Mode.
REGISTER A2: OUTPUT MODE REGISTER (ADDRESS 02h)
D7 D6 D5 D4 D3 D2 D1 D0
ILVDS2 ILVDS1 ILVDS0 TERMON OUTOFF OUTMODE2 OUTMODE1 OUTMODE0
Note That CSA Controls Channels 1, 4, 5 and 8, CSB Controls Channels 2, 3, 6 and 7.
Bits 7-5 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 4 TERMON LVDS Internal Termination Bit
0 = Internal Termination Off
1 = Internal Termination On. LVDS Output Driver Current Is 2x the Current Set by ILVDS2:ILVDS0. Internal Termination Should Only Be
Used with
1.75mA, 2.1mA or 2.5mA LVDS Output Current Modes.
Bit 3 OUTOFF Output Disable Bit
0 = Digital Outputs Are Enabled.
1 = Digital Outputs Are Disabled.
Bits 2-0 OUTMODE2:OUTMODE0 Digital Output Mode Control Bits
000 = 2-Lanes, 16-Bit Serialization
001 = 2-Lanes, 14-Bit Serialization
010 = 2-Lanes, 12-Bit Serialization
011 = Not Used
100 = Not Used
101 = 1-Lane, 14-Bit Serialization
110 = 1-Lane, 12-Bit Serialization
111 = 1-Lane, 16-Bit Serialization