ISL5857 Intersil Corporation, ISL5857 Datasheet - Page 11

• Manufacturer Part Number: ISL5857
• Description: High Speed D/A Converter
• Manufacturer: Intersil Corporation

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Timing Diagram
R
R
ISL5857
ISL5857
EQ
EQ
PIN 21
PIN 22
PIN 21
PIN 22
AT EACH OUTPUT
= 0.5 x (R
AT EACH OUTPUT
= 0.5 x (R
FIGURE 13. OUTPUT LOADING FOR DATASHEET
FIGURE 14. ALTERNATIVE OUTPUT LOADING
D11-D0
LOAD
LOAD
I
CLK
OUT
FIGURE 15. PROPAGATION DELAY, SETUP TIME, HOLD TIME AND MINIMUM PULSE WIDTH DIAGRAM
IOUTB
IOUTA
IOUTB
IOUTA
//R
//R
DIFF
DIFF
MEASUREMENTS
R
LOAD SEEN BY THE TRANSFORMER
LOAD
//R
)
R
R
R
LOAD SEEN BY THE TRANSFORMER
DIFF
A
DIFF
LOAD
R
R
), WHERE R
REPRESENTS THE
B
A
11
REPRESENTS THE
t
SU
V
V
W
OUT
OUT
0
A
1:1
= R
= (2 x IOUTA x R
= (2 x IOUTA x R
B
t
PW1
t
HLD
t
PD
R
OUTPUT = W
R
LOAD
LOAD
EQ
EQ
t
PW2
)V
)V
t
SU
ISL5857
W
1
-1
Propagation Delay
The converter requires two clock rising edges for data to be
represented at the output. Each rising edge of the clock
captures the present data word and outputs the previous
data. The propagation delay is therefore 1/CLK, plus <2ns of
processing. See Figure 15.
Test Service
Intersil offers customer-specific testing of converters with a
service called Testdrive. To submit a request, fill out the
Testdrive form. The form can be found by doing an ‘entire
site search’ at www.intersil.com on the words ‘DAC
Testdrive’. Or, send a request to the technical support center.
t
HLD
t
OUTPUT = W
PD
t
SU
W
2
0
t
HLD
OUTPUT = W
W
3
1
50%
November 12, 2004
FN6079.1