參數(shù)資料
型號(hào)： TDA8769HW/6
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： ADC
英文描述： 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
封裝： 7 X 7 MM, 1.0 MM HEIGHT, PLASTIC, HTQFP-48
文件頁(yè)數(shù)： 7/28頁(yè)
文件大?。?/td> 232K
代理商： TDA8769HW/6
2003 Dec 09
15
Philips Semiconductors
Objective specication
12-bit, 60/80/105 Msps Analog-to-Digital Converter
(ADC) Nyquist/high IF sampling
TDA8769
Table 5
Examples of possible fi, fclk and fi bandwidth combinations supported
For a dual carrier W_CDMA receiver, the most important parameters are the sensitivity and Adjacent Channel Selectivity
(ACS). In W-CDMA, it can be far below the noise floor, is defined by the Sensitivity to Noise Ratio (SENR). Its value is
negative due to the gain processing. The Adjacent Channel Power Ratio (ACPR) is the difference between the peak and
noise floor. It represents the ratio of the adjacent channel power and the average power of the channel. The ACS is
defined by the sum of SENR and ACPR. Figure 5 illustrates the relation between these parameters.
On a typical application with the TDA8769 device, the ACS obtained is 80 dB with an ACPR of 70 dB and a SENR of
10 dB. Moreover, the Noise Figure (NF) of the TDA8769 is 31.5 dB.
fi (MHz)
fclk (MHz)
fi BW (MHz)
SNR (dB)
SFDR (dBc)
250
9.60
0.20
66.5
79.9
243.95
9.60
0.20
62.6
68.5
243.95
19.20
0.20
68.4
77.2
243.95
52.00
0.20
65.7
80.0
190
40.00
1.25
72.0
80.0
106
76.80
5.00
70.8
83.6
86
76.80
5.00
72.2
87.1
80
61.44
10.00
(tbf)
70
40.00
5.00
70
69.99
58.98
1.25
(tbf)
27
51.2
3.5
(tbf)
10.8
32.5
0.30
84.3
83.0
handbook, full pagewidth
MBL875
ACPR
NF
interfering
channel
wanted
channel
ACS
noise floor
sensitivity
thermal noise
SENR
Fig.5 Adjacent channel selectivity and analog-to-digital converter sensitivity.
相關(guān)PDF資料
PDF描述
TDA8769HW/8 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
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