DAC39RF10 datasheet(48/178 Pages) TI

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8.3 Feature Description

This section describes the analog and digital features of the device.

8.3.1 DAC Output Modes

The DAC39RF10 consists of a multi-Nyquist DAC core capable of direct transmission through the third Nyquist

zone. The high output frequency capabilities are enabled by specific output switching waveforms that alter the

output waveform, changing the frequency response of the DAC to enhance the DAC images in alternate Nyquist

zones. The desired switching waveforms can be selected through the serial interface. A list of modes along with

their properties and uses are provided in Table 8-1. The responses shown in this section do not consider the

effect of the DAC analog bandwidth or external passive or active signal chain components.

Table 8-1. Summary of Multi-Nyquist Output Modes and Uses

DAC OUTPUT MODE

PASSES DC

Optimal Frequency Range

PEAK OUTPUT POWER(1)

Other

Non-return-to-zero (NRZ)

Yes

0 - FDACCLK/2

0 dBFS

Return-to-zero (RTZ)

Yes

0 - FDACCLK

–6 dBFS

Radio Frequency (RF)

FDACCLK/2 - FDACCLK

–2.8 dBFS

Dual Edge Sampling (DES)

Yes

0 - FDACCLK

0 dBFS

Duty cycle image at FDACCLK -

(1)

Peak power here does not include the effect of analog output bandwidth due to parasitic passive components or external components

DAC39RF10

SBASAC8 – MAY 2023

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DAC39RF10 Datasheet(PDF) 48 Page - Texas Instruments