DAC39RF10 datasheet(173/232 Pages) TI2

173 / 232 page

Figure 8-66. TRUNC_HLSB Register (continued)

RESERVED

TRUNC_HLSB

R/W-00h

R/W-0b

Table 8-68. TRUNC_HLSB Register Field Descriptions

Bit

Field

Type

Reset

Description

7-1

R/W

TRUNC_HLSB

R/W

adds ½ LSB offset for < 16-bit resolution modes or devices. For a

mode or device with < 16-bit output resolution, setting this bit adds a

1/2 LSB offset to reduce the average offset introduced by truncation.

Note: This register should only be changed when DP_EN=0

8.65 TX_EN_SEL Register (Offset = 02F8h) [reset = 03h]

TX_EN_SEL is shown in Figure 8-67 and described in Table 8-69.

Return to the Register Summary Table.

Transmitter Enable Control Selection.

Figure 8-67. TX_EN_SEL Register

RESERVED

QUIET_TX_DIS

ABLE

FAST_TX_EN

USE_TX_EN1

USE_TX_EN0

R/W-0h

R/W-0b

R/W-1b

Table 8-69. TX_EN_SEL Register Field Descriptions

Bit

Field

Type

Reset

Description

7-4

RESERVED

R/W

QUIET_TX_DISABLE

R/W

0: Transmission is disabled after DEM and dither by sending a

static aging safe code. For some configurations and frequencies, the

outputs will have higher noise than a static mid-scale code would

normally have. However, this mode has the lowest latency from

transmit enable to DAC output.

1: When transmission is disabled, the input to DEM and dither is

muted to minimize the output noise. This increases the latency from

transmit enable to DAC output by 56 DAC clocks

Note: This bit may only be set when FAST_TX_EN=1.

FAST_TX_EN

R/W

0: When the transmit enables are both low, JESD and datapath

clocks are shutdown to save power. When transmission is re-

enabled the outputs remain muted until valid data is available at the

output.

1: No power saving is performed and transmit enables can be

used independently. Latency from transmit enable to DAC outputs

is reduced in this mode.

USE_TX_EN1

R/W

0: DACB is controlled by the TXEN1 ball. In this mode, TX_EN1

1: DACB is controlled by the TX_EN1 register. In this mode the

TXEN1 ball input does not affect the transmit enable for DACB.

Note: USE_TX_EN1 and USE_TX_EN0 should be programmed to

the same value (individual channel control is not supported).

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DAC39RF10-SP, DAC39RF10-SEP

DAC39RFS10-SP, DAC39RFS10-SEP

SBAS932A – MARCH 2024 – REVISED FEBRUARY 2026

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