company blog about Recycle TI DAC:High-Speed DAC,Precision DAC,RF Transmitters

Recycle TI DAC:High-Speed DAC,Precision DAC,RF Transmitters

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I. TI High-Speed DACs: Ultra-high sampling rates, suitable for high-speed transient signal applications

1. Core Definitions and Technical Features

The core design objectives of high-speed DACs are to achieve the highest possible sampling rates and low-latency response, sacrificing some of the absolute static precision to prioritise high-speed signal conversion capability, rapid transient response and wideband signal output capability. These DACs typically feature GSPS-level sampling rates, support switching between multiple operating modes, and are suitable for applications such as wideband baseband signals, high-speed waveform generation and instantaneous dynamic signal output. They are also equipped with high-speed serial interfaces to meet the demands of real-time transmission of large data volumes.

Key features of TI’s high-speed DACs: ultra-high sampling rates, ultra-low nanosecond-level latency, multiple Nyquist operating modes, high-speed JESD204B/C serial interfaces, and multi-channel synchronous output, enabling rapid reconstruction of wide-bandwidth analogue signals and supporting various output modulation modes such as NRZ, RTZ and RF.

2. Leading Products and Key Specifications

TI’s high-speed DAC product range covers 12–16-bit resolution and sampling rates from 3 GSPS to 20.48 GSPS, catering to high-speed applications with varying bandwidths:

- DAC12DL3200: A 12-bit general-purpose high-speed DAC with a maximum single-channel sampling rate of 6.4 GSPS and a dual-channel rate of 3.2 GSPS. Featuring a latency of just 6–8 ns and a low-latency LVDS interface, it supports NRZ, RTZ and RF multi-mode operation. Designed specifically for low-latency high-speed waveform generation and test and measurement equipment, it offers a balance of speed and cost-effectiveness.

- DAC39RF10: A flagship 16-bit ultra-high-speed DAC, offering a single-channel sampling rate of 10.24 GSPS in standard mode; in DES mode, it achieves 20.48 GSPS at 8-bit resolution and 15.5 GSPS at 12-bit resolution. It supports multi-device synchronisation and is currently one of TI’s highest-speed general-purpose high-speed DACs, capable of rapid output of ultra-wideband signals.

- DAC38RFxx Series (DAC38RF86/96): 14-bit dual-channel high-speed DACs with a maximum sampling rate of 9 GSPS. They support wide-band signal synthesis from 0 to 4.5 GHz and offer excellent dynamic range, making them suitable for medium- to high-speed wireless communication baseband signal generation applications.

3. Typical Application Scenarios

Primarily used in scenarios demanding extremely high signal bandwidth and response speed, including high-speed arbitrary waveform generators, LiDAR signal modulation, high-speed industrial servo control, broadband baseband signal output and high-speed automated test equipment. At its core, it addresses the need for real-time, lag-free analogue conversion of high-speed digital signals.

II. TI High-Precision DACs: Ultimate Static Accuracy, Capturing Faint and Precise Signals

1. Core Definitions and Technical Features

High-precision DACs are characterised by static accuracy, ultra-low distortion, extremely low noise and ultra-high resolution as their core metrics, with priorities that differ entirely from those of high-speed DACs. Whilst these DACs do not operate at high sampling rates—typically in the KSPS to MSPS range—TI’s proprietary linear calibration, error compensation and low-drift architectural design enable them to achieve minimal integral non-linearity (INL) and differential non-linearity (DNL), as well as low temperature drift and low offset error, thereby delivering highly stable and precise analogue voltage and current signals.

Key advantages of TI’s high-precision DACs: high resolution (16–24 bits), ultra-low INL/DNL errors, low temperature drift, low harmonic distortion and high output stability. Some models incorporate an internal reference source, enabling long-term, precise output without the need for external calibration.

2. Core Technologies and Performance Advantages

TI’s high-precision DACs incorporate a number of proprietary precision technologies: on-chip self-calibration algorithms eliminate process errors; low-temperature drift circuit design suppresses interference from temperature variations; and a low-noise analogue architecture reduces output ripple. They support single-channel and multi-channel precision synchronous output, meeting the requirements for long-term stable operation under harsh industrial conditions. Their static accuracy, stability and consistency far exceed those of high-speed DACs, making them core components in precision measurement and control systems.

3. Typical Application Scenarios

Focusing on precision control and measurement scenarios: industrial process control (precise regulation of temperature, pressure and flow), high-precision instruments and meters, sensor calibration power supplies, precision drives for medical equipment, quantum measurement and control, and laboratory standard voltage sources, among others. These solutions fundamentally meet the requirements for ‘absolute precision, long-term stability and zero drift’ in output signals.

III. TI RF Transmitter DAC: Direct RF Sampling, Integrated RF Signal Source

1. Core Definition and Technical Principles

The RF Transmitter DAC (RF Sampling DAC) is a high-speed, RF-integrated specialised DAC customised by TI specifically for wireless RF applications. Distinct from general-purpose high-speed DACs, its core technology is direct RF sampling. Without the need for traditional baseband frequency conversion or up-conversion circuits, signal synthesis can be performed directly in the RF band via the high-speed DAC, converting digital RF signals directly into GHz-level analogue RF signals, thereby significantly simplifying the RF transmission chain architecture.

Essentially, these chips are specialised high-speed DACs with integrated RF transmission capabilities, combining functions such as high-speed sampling, digital modulation, RF filtering, gain control and clock synchronisation to form an all-in-one RF transmitter solution.

2. Key Technical Features

- Ultra-wide RF output frequency range: Capable of directly outputting RF signals in the MHz to GHz range; high-end models can achieve carrier frequencies exceeding 10 GHz, covering the full spectrum of requirements for 5G, microwave and radar applications.

- High-dynamic RF performance: Excellent adjacent-channel leakage ratio and harmonic suppression capability; supports the output of complex modulated signals (QAM, OFDM), meeting the RF signal purity requirements of communication systems.

- High integration: On-chip integration of a PLL clock, NCO digital oscillator, IQ modulator, digital step attenuator (DSA) and image rejection filter; some models also integrate a transmit feedback calibration circuit, eliminating the need for external RF components.

- Multi-channel synchronisation and interference immunity: Supports JESD204B/C high-speed serial interfaces and multi-device synchronisation; features built-in LO leakage cancellation and IQ mismatch calibration algorithms, significantly enhancing RF signal quality.

3. Leading Product Models and Specifications

- DAC39RF Series (DAC39RF10/DAC39RFS12): High-end RF sampling DACs with 16-bit resolution and a maximum single-channel data rate of 24 GSPS. Capable of generating signals with a bandwidth of up to 12 GHz and carrier frequencies exceeding 10 GHz, they support multi-Nyquist RF outputs and are suitable for 5G millimetre-wave and broadband radar applications.

- AFE7903: Integrated RF transceiver, featuring a dual-channel 12 GSPS transmit DAC, with an RF frequency range of 5 MHz to 7.4 GHz and a single-channel signal bandwidth of 400 MHz. It incorporates a digital stepped attenuator with a 40 dB range and supports multi-device synchronisation, designed specifically for 5G base stations and microwave communications.

- AFE7728D: A dedicated RF transmit front-end integrating a 14-bit 3.3 GSPS IQ DAC, a programmable filter and an IQ modulator. It features built-in gain control and closed-loop calibration functions, capable of automatically correcting IQ mismatch and local oscillator leakage issues, and is suitable for commercial wireless communication transmit systems.

- DAC38RF84/85/86: Classic 14-bit 9 GSPS RF DACs, outputting RF signals from 0 to 4.5 GHz, with excellent dynamic range; widely used in 3G/4G base stations and conventional radar RF transmission links.

4. Core Application Scenarios

Focused on the wireless RF transmission sector: 5G/6G communication base stations, microwave point-to-point communication, phased-array radar, electronic countermeasures, satellite communications, software-defined radio (SDR), etc. These devices enable the direct transmission of broadband, high-frequency, high-purity RF signals, significantly simplifying the RF hardware architecture whilst reducing equipment size and power consumption.