DAC5682Z datasheet(17/56 Pages) TI

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-20

160 165 170 175 180 185 190 195 200 205 210

f-Frequency-MHz

CarrierPower:-15.85dBm,

ACLR(5MHz):69.66dB,

ACLR(10MHz):70.65dB,

=491.52MSPS,

I =184.32MHz,

x2Interpolation

PLL Off

data

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

160 165 170 175 180 185 190 195 200 205 210

f-Frequency-MHz

CarrierPower:-15.85dBm,

ACLR(5MHz):65.85dB,

ACLR(10MHz):69.60dB,

=491.52MSPS,

I =184.32MHz,

x2Interpolation

PLL On

data

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

160 165 170

175 180 185 190 195 200 205 210

f-Frequency-MHz

CarrierPower:-15.20dBm,

ACLR(5MHz):71.18dB,

ACLR(10MHz):72.26dB,

=491.52MSPS,

I =184.32MHz,

x2Interpolation

PLL Off

data

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

160 165 170

175 180 185 190 195 200 205 210

f-Frequency-MHz

CarrierPower:-15.20dBm,

ACLR(5MHz):66.53dB,

ACLR(10MHz):69.68dB,

=491.52MSPS,

I =184.32MHz,

x2Interpolation

PLL On

data

TEST METHODOLOGY

DAC5682Z

SLLS853A – AUGUST 2007 – REVISED NOVEMBER 2007

TYPICAL CHARACTERISTICS (continued)

Figure 21. Four Carrier W-CDMA Test Model 1

Figure 22. Four Carrier W-CDMA Test Model 1

Figure 23. Three Carrier W-CDMA Test Model 1 with Gap

Figure 24. Three Carrier W-CDMA Test Model 1 with Gap

Typical AC specifications were characterized with the DAC5682ZEVM using the test configuration shown in

Figure 25. A sinusoidal master clock frequency is generated by an HP8665B signal generator and into a splitter.

One output drives an Agilent 8133A pulse generator, and the other drives the CDCM7005 clock driver. The

8133A converts the sinusoidal frequency into a square wave output clock and drives an Agilent ParBERT

81250A pattern-generator clock. On the EVM, the DAC5682Z CLKIN/C input clock is driven by an CDCM7005

clock distribution chip that is configured to simply buffer the external 8665B clock or divide it down for PLL test

configurations.

The DAC5682Z output is characterized with a Rohde and Schwarz FSU spectrum analyzer. For WCDMA signal

characterization, it is important to use a spectrum analyzer with high IP3 and noise subtraction capability so that

the spectrum analyzer does not limit the ACPR measurement. For all specifications, both DACA and DACB are

measured and the lowest value used as the specification.

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