RA=RB=50, RDIFF" />
參數資料
型號: ISL5929/2IN
廠商: Intersil
文件頁數: 4/13頁
文件大?。?/td> 0K
描述: IC DAC DUAL 14BIT 3.3V 48-MQFP
標準包裝: 250
位數: 14
數據接口: 并聯(lián)
轉換器數目: 2
電壓電源: 模擬和數字
功率耗散(最大): 274mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應商設備封裝: 48-TQFP(7x7)
包裝: 托盤
輸出數目和類型: 4 電流,單極
采樣率(每秒): 250M
12
RA=RB=50, RDIFF=100, assuming RLOAD=50. The
performance of Figure 13 and Figure 14 is basically the
same, however leaving the center tap of Figure 14 floating
allows the circuit to find a more balanced virtual ground,
theoretically improving the even order harmonic rejection,
but likely reducing the signal swing available due to the
output voltage compliance range limitations.
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 at www.intersil.com/testdrive. Or, send a
request to the technical support center.
RDIFF
ISL5929
RLOAD
FIGURE 13. OUTPUT LOADING FOR DATASHEET
MEASUREMENTS
OUTA
OUTB
VOUT = (2 x OUTA x REQ)V
LOAD SEEN BY THE TRANSFORMER
RLOAD REPRESENTS THE
1:1
REQ = 0.5 x (RLOAD // RDIFF)
AT EACH OUTPUT
FIGURE 14. ALTERNATIVE OUTPUT LOADING
ISL5929
OUTA
OUTB
VOUT = (2 x OUTA x REQ)V
REQ = 0.5 x (RLOAD // RDIFF// RA), WHERE RA=RB
AT EACH OUTPUT
RLOAD
RDIFF
RA
RB
LOAD SEEN BY THE TRANSFORMER
RLOAD REPRESENTS THE
Timing Diagram
FIGURE 15. PROPAGATION DELAY, SETUP TIME, HOLD TIME AND MINIMUM PULSE WIDTH DIAGRAM
CLK
IOUT
50%
tPW1
tPW2
tSU
tHLD
tSU
tPD
tHLD
D13-D0
W0
W1
W2
W3
OUTPUT=W0
OUTPUT=W1
tPD
OUTPUT=W-1
ISL5929
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