Datasheet

CLKIN
OUTx
CLKOUT
t
2
t
1
t
3
t
D3
t
H1
t
D1
t
4
t
D2
ADS1209
www.ti.com SBAS491 –FEBRUARY 2010
PARAMETER MEASUREMENT INFORMATION
Figure 1. ADS1209 Timing Diagram
TIMING CHARACTERISTICS
(1)
Over the recommended operating ambient temperature range of –40°C to +105°C, AV
DD
= 5V, and BV
DD
= 2.7V to 5V, unless
otherwise noted.
PARAMETER TEST CONDITIONS MIN MAX UNIT
t
1
CLKIN period CLKSEL = 0 41.6 1000 ns
t
2
CLKIN high time CLKSEL = 0 10 t
1
– 10 ns
CLKSEL = 0 2 × t
1
ns
t
3
CLKOUT period
CLKSEL = 1 83 125 ns
t
4
CLKOUT high time (t
3
/2) – 5 (t
3
/2) + 5 ns
t
D1
CLKIN rising edge to CLKOUT falling edge delay CLKSEL = 0 10 ns
t
D2
CLKIN rising edge to CLKOUT rising edge delay CLKSEL = 0 10 ns
CLKSEL = 0 t
2
+ 7 ns
t
D3
CLKOUT rising edge to new data valid delay
CLKSEL = 1 (t
3
/4) + 8 ns
CLKSEL = 0 t
2
– 3 ns
t
H1
Data valid hold time referred to rising CLKOUT edge
CLKSEL = 1 (t
3
/4) – 8 ns
(1) All input signals are specified with t
R
= t
F
= 1.5ns (10% to 90% of BVDD) and timed from a voltage level of (V
IL
+ V
IH
)/2.
Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): ADS1209