Edge629
TEST AND MEASUREMENT PRODUCTS
AC Characteristics (continued)
Test Conditions (unless otherwise specified): "Recommended Operating Conditions."
Note 1: Tested with an input pulse = 50 ns. This parameter is guaranteed by characterization for input pulse
widths ≥ 700 ps.
Note 2: Coarse Delay = 0, Fine Delay and Falling Edge Adjust disabled. Case Temperature = 50˚C.
Note 3: Coarse Delay is monotonic. Fine Delay is Monotonic. Since the fine delay spans close to 2 LSBs of coarse
delay, the summation of digital codes for coarse and fine delays is not monotonic. Proper binary searching
using both the coarse and fine delays is achieved first with the coarse (with SFD=1), and then with the fine
delays as separate searches.
Parameter
Data Interface
Set Up Time
SDI to CK ↑
CS to CK ↑
UPDATE to CK ↓
Hold Time
CK ↑ to SDI
CK ↑ to CS
CK ↓ to UPDATE
Minimum Pulse Widths
CK High
CK Low
CK Period
DAC Settling Time
Symbol
Min
Typ
Max
Units
Tsu
10
Tsu
10
Tsu
20
Th
4
Th
4
Th
4
13
13
T
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
1
µs
Test Conditions (unless otherwise specified): "Recommended Operating Conditions."
AC Characteristics are guaranteed by design and characterization. Not production tested.
2005 Semtech Corp. Rev. 3, 8/1/05
15
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