ltc2258cuj-12 Linear Technology Corporation, ltc2258cuj-12 Datasheet - Page 26

• Manufacturer Part Number: ltc2258cuj-12
• Description: 12-bit, 65/40/2 5msps Ultralow Power 1.8v Adcs
• Manufacturer: Linear Technology Corporation

LTC2258-12
LTC2257-12/LTC2256-12
APPLICATIONS INFORMATION
26
REGISTER A2: TIMING REGISTER (ADDRESS 02h)
REGISTER A3: OUTPUT MODE REGISTER (ADDRESS 03h)
Bits 7-4
Bit 3
Bits 2-1
Bit 0
Bit 7
Bits 6-4
Bit 3
Bit 2
Bits 1-0
D7
D7
X
X
Unused, Don’t Care Bits.
CLKINV
0 = Normal CLKOUT Polarity (As Shown in the Timing Diagrams)
1 = Inverted CLKOUT Polarity
CLKPHASE1:CLKPHASE0
00 = No CLKOUT Delay (As Shown in the Timing Diagrams)
01 = CLKOUT+/CLKOUT– Delayed by 45° (Clock Period • 1/8)
10 = CLKOUT+/CLKOUT– Delayed by 90° (Clock Period • 1/4)
11 = CLKOUT+/CLKOUT– Delayed by 135° (Clock Period • 3/8)
Note: If the CLKOUT Phase Delay Feature is Used, the Clock Duty Cycle Stabilizer Must Also be Turned On
DCS
0 = Clock Duty Cycle Stabilizer Off
1 = Clock Duty Cycle Stabilizer On
Unused, Don’t Care Bit.
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
TERMON
0 = Internal Termination Off
1 = Internal Termination On. LVDS Output Driver Current is 1.6× the Current Set by ILVDS2:ILVDS0
OUTOFF
0 = Digital Outputs are Enabled
1 = Digital Outputs are Disabled and Have High Output Impedance
OUTMODE1:OUTMODE0
00 = Full-Rate CMOS Output Mode
01 = Double Data Rate LVDS Output Mode
10 = Double Data Rate CMOS Output Mode
11 = Not Used
ILVDS2
D6
D6
X
Clock Duty Cycle Stabilizer Bit
Output Clock Invert Bit
LVDS Internal Termination Bit
Output Disable Bit
ILVDS1
D5
D5
X
Digital Output Mode Control Bits
Output Clock Phase Delay Bits
ILVDS0
D4
D4
X
TERMON
CLKINV
D3
D3
CLKPHASE1
OUTOFF
D2
D2
CLKPHASE0
OUTMODE1
D1
D1
OUTMODE0
DCS
D0
D0
225812p