LM12434 Datasheet, PDF (12/80 Pages) National Semiconductor (TI) – Sign Data Acquisition System with Serial I/O and Self-Calibration

2 0 Electrical Specifications (Continued)
2 3 DIGITAL SWITCHING CHARACTERISTICS The following specifications apply to the LM12434 and LM12 L 438 for V_Aa
e V_Da e 5V 3 3V AGND e DGND e 0V C_L (load capacitance) on output lines e 80 pF unless otherwise specified
Boldface limits apply for T_A e T_J e T_MIN to T_MAX all other limits for T_A e T_J e 25 C (Notes 6 7 and 9) (Continued)
2 3 3 TMS320 Interface Mode
Symbol
(See Figure Below)
t₂₂
t₂₃
t₂₄
t₂₅
t₂₆
t₂₇
t₂₈
t₂₉
Parameter
SCLK (Serial Clock) Period
FSX Set-Up Time to SCLK High
FSX Hold Time from SCLK High
Data in (DX) Set-Up
Time to SCLK Low
Data in DX Hold Time from
SCLK Low
FSR High from SCLK High
FSR Low from SCLK Low
SCLK High to Data
Out (DR) Change
Conditions
Typical
(Note 10)
Limits
(Note 11)
125 167
30 50
10
0
30 120
80 100
120
90
Units
(Limit)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (max)
ns (max)
ns (max)
TL H 11879 – 23
12