参数资料
型号: DAC5687IPZP
厂商: TEXAS INSTRUMENTS INC
元件分类: DAC
英文描述: PARALLEL, WORD INPUT LOADING, 0.0104 us SETTLING TIME, 16-BIT DAC, PQFP100
封装: GREEN, PLASTIC, HTQFP-100
文件页数: 59/79页
文件大小: 2490K
代理商: DAC5687IPZP
www.ti.com
(a) X2 Mode
(b) X4L Mode
fDAC MHz
0
10
20
30
40
50
60
70
80
90
0
100
200
300
400
500
Spurious
Amplitude
dBc
G032
fDAC/2
fDAC MHz
0
10
20
30
40
50
60
70
80
90
100
0
100
200
300
400
500
Spurious
Amplitude
dBc
G033
fDAC/2
fDAC/4
(c) X4 Mode
(d) X8 Mode
fDAC MHz
0
10
20
30
40
50
60
70
80
90
100
0
100
200
300
400
500
Spurious
Amplitude
dBc
G034
fDAC/2
fDAC/4
fDAC x 3/4
fDAC MHz
0
10
20
30
40
50
60
70
80
90
100
0
100
200
300
400
500
Spurious
Amplitude
dBc
G035
fDAC/2
fDAC/4
fDAC x 3/4
fDAC/8
fDAC x 7/8
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
Figure 73 and Figure 74 show the typical worst-case spurious signal amplitudes vs fDAC for a signal frequency
fSIG = 11 × fDAC/32 in each mode for PLL on (PLL clock mode) and PLL off (external and dual-clock modes).
Each spurious signal (fDAC/2, fDAC/4 and fDAC/8) has its own curve. The spurious signal amplitudes can then be
adjusted for the exact signal frequency fSIG by applying the amplitude adjustment factor shown in Figure 75. The
amplitude adjustment factor is the same for each spurious signal (fDAC/2, fDAC/4, and fDAC/8) and is normalized for
fSIG = 11 × fDAC/32.
Figure 73. Clock-Related Spurious Signal Amplitude With PLL Off for fSIG = 11 × fDAC / 32
62
Copyright 2005–2006, Texas Instruments Incorporated
Product Folder Link(s): DAC5687
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