AD9136-EBZ datasheet(98/117 Pages) AD

98 / 117 page

AD9135/AD9136

Data Sheet

Rev. C | Page 98 of 117

Address

Name

Bit No.

Bit Name

Settings

Description

Reset

Access

0x0E7

CAL_CLKDIV

[7:4]

RESERVED

Must write the default value for proper

operation.

0x3

R/W

CAL_CLK_EN

Enable Self Calibration Clock.

0x0

R/W

Enable calibration clock

Disable calibration clock

[2:0]

RESERVED

Reserved.

0x0

0x0E8

CAL_PAGE

[7:4]

RESERVED

Reserved.

0x0

[3:0]

CAL_PAGE

DAC Calibration Paging. Selects which of the

DACs are being accessed for calibration or

calibration readback. This paging affects

0xF

R/W

Calibration: any number of DACs can be

accessed simultaneously to write and

calibrate. Write a 1 to Bit 0 to include DAC0.

Write a 1 to Bit 2 to include DAC1.

Readback: only one DAC at a time can be

accessed when reading back CAL_CTRL

(Register 0x0E9). Write a 1 to Bit 0 to read

from DAC0 or write a 1 to Bit 2 to read from

DAC1 (the other bits must be 0).

0x0E9

CAL_CTRL

CAL_FIN

Calibration finished. This bit is high when the

calibration has completed. If the calibration

completes and either CAL_ERRHI or CAL_

ERRLO is high, then the calibration cannot be

considered valid and are considered a timeout

event.

0x0

Calibration ran and is finished

CAL_ACTIVE

Calibration Active. This bit is high while the

calibration is in progress.

0x0

Calibration is running

CAL_ERRHI

SAR Data Error: Too High. This bit is set at the

end of a calibration cycle if any of the calibra-

tion DACs has overranged to the high side.

This typically means that the algorithm adjusts

the calibration preset of the calibration DACs

and runs another cycle.

0x0

Data saturated high

CAL_ERRLO

SAR Data Error: Too Low. This bit is set at the

end of a calibration cycle if any of the calibra-

tion DACs has overranged to the low side.

This typically means that the algorithm adjusts

the calibration preset of the calibration DACs

and runs another cycle.

0x0

Data saturated low

[3:2]

RESERVED

Reserved.

0x0

CAL_START

Calibration Start. The rising edge of this bit

kicks off a calibration sequence for the DACs

that have been selected in the CAL_INDX

0x0

R/W

Normal operation

Start calibration state machine

CAL_EN

Calibration Enable. Enable the calibration

DAC of the converter. Enable to calibration

engine and machines. Prepare for a calibration

start. For calibration coefficients to be applied

to the calibrated DACs, this bit must be high.

0x0

R/W

Do not use calibration DACs

Use calibration DACs

AD9136-EBZ Datasheet(PDF) 98 Page - Analog Devices

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