AD9136-EBZ datasheet(77/117 Pages) AD

77 / 117 page

Data Sheet

AD9135/AD9136

Rev. C | Page 77 of 117

The post-calibration result is a function of operating

temperature. A set of calibration coefficients obtained at one

temperature may not be the optimal setting for a different

temperature. Figure 89 and Figure 90 show the typical

temperature drift effect after a single run calibration.

For optimal performance, run the calibration again when the

operating temperature changes significantly. Note that it is

recommended to power down the DAC outputs when running

the calibration routine. If continuous transmission is required in

the system, running the calibration again during the operation

may not be an option. In this case, it is recommended to perform a

calibration at the average temperature of the operating temperature

range and to use the same set of coefficients during the operation.

This results in the best overall performance over temperature.

Figure 89. Post-Calibration HD2 and HD4 over Temperature, Calibrated at 25°C

Figure 90. Post-Calibration IMD2 over Temperature, Calibrated at 25°C

–40

–50

–60

–70

–80

–90

–100

100

150

fOUT (MHz)

200

250

300

–40°C

+25°C

+85°C

SECOND HARMONIC

FOURTH HARMONIC

–60

–65

–70

–75

–80

–90

–85

–95

–100

100

150

fOUT (MHz)

200

250

300

–40°C

+25°C

+85°C

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