DAC5674IPHPG4【PDF 6/39 页】IC DAC 14BIT 400MSPS 48-HTQFP

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Sheet目录1992

2页 3页 4页 5页 [6页]7页 8页 9页 10页

DAC5674

SLWS148A SEPTEMBER 2003 REVISED OCTOBER 2005

www.ti.com

Table 1. Interpolation Filters Configuration

FILTER 1

CONFIGURATION

FILTER 2

CONFIGURATION

IF OUTPUT RANGE 1

(FIRST NYQUIST ZONE)

IF OUTPUT RANGE 2

(SECOND NYQUIST ZONE)

CONFIGURATION

FREQUENCY

SINX/X ATT. [dB]

FREQUENCY

SINX/X ATT. [dB]

Low pass

…0.4Fdata

…0.14

3.6

…4Fdata

19.2

…∞

Low pass

High pass

1.6

…2Fdata

2.42

…3.92

…2.4Fdata

3.92

…5.94

High pass

Low pass

0.6

…0.8Fdata

0.32

…0.58

3.2

…3.4Fdata

12.6

…15.4

High pass

1.2

…1.4Fdata

1.33

…1.83

2.6

…2.8Fdata

7.20

…8.69

Table 2. Interpolation Filters Configuration: Example Frequencies GSM

FILTER 1

FILTER 2

IF OUTPUT RANGE 1

(FIRST NYQUIST ZONE)

IF OUTPUT RANGE 2

(SECOND NYQUIST ZONE)

FILTER 1

CONFIGURATION

FILTER 2

CONFIGURATION

IF FREQUENCY [MHz]

CONFIGURATION

Fdata = 52 MSPS

Fdata = 78 MSPS

Fdata = 52 MSPS

Fdata = 78 MSPS

Low pass

…20.8

…31.2

187.2

…208

280.8

…312

Low pass

High pass

83.2

…108

124.8

…156

104

…124.8

156

…187.2

High pass

Low pass

31.2

…41.6

46.8

…62.4

166.4

…176.8

249.6

…265.2

High pass

62.4

…72.8

93.6

…109.2

135.2

…145.6

202.8

…218.4

Table 3. Interpolation Filters Configuration: Example Frequencies W-CDMA, IF = Fdata/4, FDATA = 61.44

MSPS: Fupdate = 245.76 MSPS

FILTER 1

CONFIGURATION

FILTER 2

CONFIGURATION

IF FREQUENCY [MHZ]

(FIRST NYQUIST ZONE)

IF FREQUENCY [MHZ]

(SECOND NYQUIST ZONE)

CONFIGURATION

IF CENTER [MHz]

SINX/X ATT. [dB]

IF CENTER [MHz]

SINX/X ATT. [dB]

Low pass

15.36

0.05

230.4

23.6

Low pass

High pass

107.52

2.93

138.24

5.11

High pass

Low pass

46.08

0.51

199.68

13.2

High pass

76.8

1.44

168.96

8.29

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