DAC63202 datasheet(32/83 Pages) TI

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7.4.3.2 Programmable Window Comparator

Window comparator mode is enabled by setting the CMP-X-MODE bit to 10b (see also Table 7-2). Figure 7-8

shows that the window bounds are set by the DAC-X-MARGIN-HIGH and the DAC-X-MARGIN-LOW registers.

The output of the window comparator for a given channel is indicated by the respective WIN-CMP-X bit in

the CMP-STATUS register. The comparator output (WIN-CMP-X) can be latched by writing 1 to the WIN-LATCH-

EN bit in the COMMON-CONFIG register. After being latched, the comparator output can be reset using the

corresponding RST-CMP-FLAG-X bit in the COMMON-DAC-TRIG register. For the reset to take effect, the input

must be within the window bounds.

DAC-X-MARGIN-HIGH

DAC-X-MARGIN-LOW

WIN-CMP-X

FBx/AINx

RST-CMP-FLAG-X

WIN-LATCH-EN = 0

WIN-LATCH-EN = 1

Figure 7-8. Window Comparator Operation

A single comparator is used per channel to check both the margin-high and margin-low limits of the window.

Therefore, the window comparator function has a finite response time (see also Section 6.7). The static behavior

of the WIN-CMP-X bit is not reflected at the output pins. Set the CMP-X-OUT-EN bit to 0. The WIN-CMP-X bit

must be read digitally using the communication interface. This bit can also be mapped to the GPIO pin (see also

Table 7-19).

Note

• The value of the DAC-X-MARGIN-HIGH register must be greater than that of the DAC-X-MARGIN-

LOW register.

• Set the SLEW-RATE-X bit to 0000b (no-slew) and LOG-SLEW-EN-X bit to 0b in the DAC-X-FUNC-

CONFIG register to get the best response time from the window comparator.

• The CMP-X-OUT-EN bit in the DAC-X-VOUT-CMP-CONFIG register can be set to 0b to eliminate

undesired toggling of the OUT pin.

DAC53202, DAC63202

SLASF47 – MAY 2022

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DAC63202 Datasheet(PDF) 32 Page - Texas Instruments