forward

Функциональный генератор / Arbitrary Waveform Generator (AWG)

Описание:
Using the THS3091 high voltage, low distortion current-feedback op amp, this reference design showcases the technique and the benefits of configuring multiple op-ampsin a load sharing configuration when driving high voltage signals into heavy loads. Supported by a full scale application report, the design can be easily adjusted for a given application.

Возможности:

15V supply voltage Up to 24VPP output swing Third-Harmonic Distortion of 32dBc when driving a 20VPP, 70MHz sine wave into a 100Ω load (double-terminated 50Ω cable) Second-Harmonic Distortion of 38dBc when driving a 20VPP, 70MHz sine wave into a 100Ω load (double-terminated 50Ω cable) High Current Drive Capability (up to 400mA with two THS3091 op amps) This reference design has been lab tested and is supported with design files and a design guide

Документация:
  • Схемотехника
  • BOM
  • Тестирование
Описание:
Reference Design for a Low Power Fully Differential Programmable Gain Amplifier using the TI OPA2683 Low Power Dual Current Feedback Amplifier. This design guide reviews some of the design challenges necessary to create such a circuit. The design guide reviews the results and provides some recommendations for using/designing a Low Power FDA PGA.

Возможности:

Low Power Fully Differential Amplifier Low Power Programmable Gain Amplifier Wide Bandwidth Relative to High Gain +/-5V supply voltage Gains of 2, 21, 50, and 70 V/V This reference design has been lab tested and is supported with design files and a design guide

Документация:
  • Схемотехника
  • BOM
  • Тестирование
Описание:
Using the LMH6629 and OPA684 op amps, this reference design deals with the difficulties and limitations of developing very high gain, multistage amplifier circuits. Supported by a full scale application report including theory, simulations, board design and evaluation, this design can be easily adjusted for a given application.

Возможности:

High Voltage Gain - up to 120,000 V/V High Bandwidth - Flat Band 100 kHz - 4 MHz @ 120,000 V/V Low Supply Operation (+/-2.5 V) Low Component Count This reference design has been lab tested and is supported with design files and an application report

Документация:
  • Даташит
  • Схемотехника
  • BOM
  • Тестирование
Описание:
The TSW308x is an example design of a wideband digital to RF transmit solution capable of generating 600 MHz of contiguous RF spectrum. The system provides a reference on how to use the DAC34x8x, TRF3705 IQ modulator and LMK0480x to achieve this. This reference EVM coupled with a pattern generator such as the TSW1400EVM can be used to arbitrarily generate narrow band and wideband signals at RF. Examples of configurations to generate standards compliant WCDMA test signals are provided.

Возможности:

Complete Digital to RF transmit solution Up to 600MHz of contiguous signal bandwidth RF signal synthesis from 300MHz to 4GHz On board RF Amp and Attenuator Easy evaluation platform with TSW1400 and HSDC Pro

Документация:
  • Даташит
  • Схемотехника
  • BOM
  • Топология платы
Описание:
This design shows how to use an active interface with the current sink output of the DAC5682Z - typical applications for this include front ends for arbitrary waveform generators. The EVM includes the DAC5682Z for digital-to-analog conversion, an OPA695 to demonstrate an active interface implementation using a wide bandwidth operational amplifier and a THS3091 and THS3095 to showcase an operational amplifier with large voltage swing. Also included on board are a CDCM7005, VCXO and Reference for clock generation, and linear regulators for voltage regulation. Communication to the EVM is accomplished via a USB interface and GUI software.

Возможности:

Example of a high performance arbitrary waveform generator front end Wideband signal generation using DAC5682z Provide 1 wideband high performance output capable of driving 50 ohm loads using OPA695 Provide a high voltage output using the THS3095 with a maximum of 30Vpp Easy evaluation platform using TSW1400 and HSDC Pro pattern generator software

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
The analog interface circuits in this reference design are often used between current-source based digital-to analog converters (DAC) and quadrature modulators. While the DAC348x is used as an example of a TI high-speed DAC, the circuits can be applied to other current-source based converters with slight modifications. The DAC348x and TRF3705 analog interface are populated by default on the TSW308xEVMs. Both the DAC348x and TRF3705 are designed with the same DC bias and AC swing specification to provide a seamless interface. Other circuit topologies are described to account for other DC bias and AC swing specifications. By accounting the correct DC bias and proper AC swing, system designers can apply these circuits based on their application needs in order to achieve optimal performance.

Возможности:

A breakdown of the interface on the TSW308x is explained to show the direct connection between the DAC3484 and TRF3705 General Design equations of current source DACs with IQ modulators are provided and explained TINA spice models are provided for different interface networks for DC, AC, and filtered interfaces to meet customer needs

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:

Это решение демонстрирует модификации платы, требуемые для приложений с поддержкой высокой пропускной способности и высокой частоты, использующий текущий источник ЦАП DAC38J84 с модулятором TRF3704. TRF3704 – это модулятор 6 ГГц, поддерживающий широкие диапазоны модуляций. DAC38J84 – это конвертер 2,5 Гвыборок/с, поддерживающий базовый диапазон 600 MГц. Комбинация облегчает работу на частотах и с пропускной способностью, которые ранее были недостижимы для высокопроизводительных систем связи.

Возможности:

  • Поддержка полосы пропускания 600 МГц, соответствующей полосы пропускания радиочастотного диапазона 1,2 ГГц;
  • Работа до 6 ГГц с хорошим коэффициентом усиления и линейностью характеристики;
  • Обеспечивает правильное преобразование сетевого интерфейса ЦАП для модулятора;
  • Обеспечивает резервирование для LPF между ЦАП и модулятором;
  • Вносит изменения для обеспечения плоской частотной характеристики ББ для приложений с высокой пропускной способностью;
  • TSW38J84 - это типовое решение с графическим интерфейсом, которое можно купить; любые изменения могут быть простестированы на этой отладочной плате.

Документация:
  • Схемотехника
  • BOM
  • Топология платы
  • Тестирование
Описание:

Базовый проект TSW38J84 EVM представляет собой платформу для демонстрации решения двухканального передатчика с интегрированным резонатором. В данном базовом проекте используется устройство 2.5 GSPS DAC38J84 с высококлассными модуляторами: TRF3722 (с интегрированными PLL/ VCO) и TRF3705. TRF3722 и TRF3705 можно объединить для создания двухканального решения, в котором TRF3722 будет выступать в роли локального резонатора (LO) для обоих модуляторов. Интерфейс связи между DAC38J84 и модуляторами, а также методы измерения характеристик совместной работы ЦАП и модуляторов могут варьироваться. Приведённые результаты измерений включают в себя измерения полосы пропускания, выходной точки пересечения третьего порядка, искажения гармоник и подавления частот за пределами полосы пропускания.

Возможности:

  • Полноценное решение двухканальной передачи «биты-РЧ» и использованием интерфейса JESD204B
  • Платформа для тестирования 2.5 GSPS DAC38J84 с двумя высококлассными модуляторами
  • Выходная частота TRF3722 и TRF3705 достигает 4 ГГц
  • Решение с поддержкой полосы пропускания до 1 ГГц
  • Решение двухканальной передачи для современных систем связи, военного назначения и контрольно-измерительных приборов

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
This board allows the LMH5401 to be used as a low gain amplifier or as an attenuator.

Возможности:

DC coupled Minumum gain of 0.5V/V Split Supply voltage 6 GHz Bandwidth

Документация:
  • Схемотехника
  • BOM
Описание:
This design is a 9.8-GHz wideband, low-phase noise, integrated continuous wave (CW) RF signal generator with versatile spur reduction technique. The output level can be programmed from -32 dBm to 14.5 dBm in 0.5-dB steps. This signal generator can be used as local oscillator for applications, such as analog and vector signal generator, and can also be used as a clock generator for RF ADCs. The TIDA-00626 can be controlled from any PC via the TI USB2ANY interface and also using the microcontroller MSP430F5529 launch pad.
Возможности:

Integrated wideband frequency synthesizer with output range of 0.02 GHzto 9.8 GHz Excellent phase-noise performance; synthesizer phase noise at 6 GHz, -110 dBc/Hzat 100-KHz offset, -132 dBc/Hzat 1-MHz offset Low-noise synthesizer, in-band spurs (-75 dBc) Programmable output level 14.5 dBm to -32 dBm, 0.5-dB steps Versatile boundary spurs reduction using LMK61E2

Документация:
  • Схемотехника
  • BOM
Описание:
A wideband single-ended to differential conversion reference design in both DC- and AC- coupled applications is presented. The design evaluates the performance of the LMH5401 and LMH6401 cascade and offers insight into the design.

Возможности:

4.5GHz bandwidth with 30dB maximum total voltage gain Digitally-controlled gain range of 32dB in 1dB steps 50-Ω Input DC- or AC-coupled single-ended to differential conversion Output IP3 at RL = 200Ω: 40dBm at 500MHz 33dBm at 1GHz Output common-mode control capability: VMID ±0.5V Compact design ideal for portable application with PD = 645mW

Документация:
  • Схемотехника
  • BOM
Описание:
To further increase the range, data rate, and reliability of modern mobile communications systems, system designers continue to place more emphasis on multiple-antenna transmitter systems to achieve combinations of spatial diversity and spatial multiplexing. Such implementations can further compensate for path loss and the multipath effect of transmission mediums. These implementations can also potentially increase range and data rate and improve reliability. Multiple-antenna systems with beamforming techniques also allows for better focus of transmitter energy and the system can potentially reduce the size of an antenna while increasing the transmitter range. More mobile communications systems and radar systems are starting to adopt multiple-antenna transmitters in their designs. For such multiple-antenna transmitter implementations, each individual transmitter requires digital-to-analog converters (DACs) for the digital bits to RF transmission. Multiple transmitters and the associated antenna must also be synchronized in time. The design may utilize JESD204B subclass 1 type DAC3xJ8x, which has the capability to achieve multiple DAC3xJ8x device synchronization. The DAC3xJ8x is a high-speed 16-bit DAC with up to 2.8 GSPS of sample rate. All of the capabilities of DAC3xJ8x simplify device synchronization and facilitate the design of a multiple-antenna transmitter system.

Возможности:

High-Speed Data Transfer High Sample Rate Digital-to-Analog Conversion JESD204B Subclass 1 Support Multi-Device Synchronization Synchronized Clock Distribution

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
This reference design provides an efficient power supply scheme to power-up the RF-sampling DAC38RF8x digital-to-analog data converter (DAC) without sacrificing performance and also reduces board area and BOM. The reference design uses both DC/DC switchers and an LDO to power-up the DAC38RF8x while achieving high analog performance (spurious and phase noise) and minimizing power efficiency trade-offs. The design method outlined here can be extended to the power supply design of other RF-sampling data converters.
Возможности:

Provides an Efficient Power Solution for RF-Sampling DACs Enables Optimal Spur and Phase Noise Performance Reduces Board Area Lowers Bill of Materials (BOM) Cost

Документация:
  • Даташит
  • Схемотехника
  • BOM
Описание:
The TIDA-01346 design uses two LMX2594 synthesizers in combination to produce lower noise than is possible with just one. By combining the output of two synthesizers that are in phase, a theoretical 3 dB phase noise benefit is possible due to the output power being 6 dB higher while the noise power is only 3 dB higher. The LMX2594 is an ideal synthesizer for this application as it has a SYNC feature that allows it to have deterministic and repeatable phase as well as a programmable phase that can be used to correct for any phase error due to trace mismatches or any other factors.
Возможности:

3 to 12.5 GHz Output Frequency 40-fs rms Jitter at 9GHz (100 Hz to 100 MHz)

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:
The TIDA-01405 design demonstrates an inverting power module (voltage inverter) to generate a –1.8V rail at up to 2A of current from a 3V to 15.2V input voltage. Such a negative voltage is required for many communications equipment systems as well as industrial equipment, such as test and measurement. Using the TPS82130 power module enables a very simple negative voltage inverter (inverting buck-boost) design to create a 1.8V negative output voltage at high 2A currents.
Возможности:

Simple Power Module Design Total Solution Size Less Than 50mm2 High Output Current of 2A (VIN ≥ 5V) Wide Input Voltage Range of 3V to 15.2V Low Noise (Less Than 10mV Output Ripple) 125°C Rated Solution

Документация:
  • Схемотехника
  • BOM
Описание:
The TIDA-01410 reference design uses two LMX2594 synthesizers to produce two outputs that are both coherent and adjustable in phase. Phase coherent outputs are useful for interleaving data converters and also for beam steering applications. This reference design has identical routing for both synthesizers so that it is easy to measure the phase between them.

Возможности:

Two outputs with coherent and adjustable phase Output frequency from 10 MHz to 15 GHz High output power

Документация:
  • Схемотехника
  • BOM
  • Топология платы
Описание:

Управление нагрузкой с низким сопротивлением с использованием прецизионного усилителя – важное требования во многих системах. Данной функции можно добиться с помощью силовых операционных усилителей, но цена подобного решения может быть непомерно высока. В данном прецизионном проекте от TIпоказывается, как можно добиться надёжного управления выходом с помощью прецизионного усилителя и простого бюджетного дискретного биполярного транзистора.

Данный базовый проект имеет характер аппаратного решения.

 

Возможности:

  • Увеличение выходного тока управления до 200 мА
  • Прецизионное управление напряжением на низкоимпедансной нагрузке
  • Бюджетная реализация

Документация:
  • Даташит
  • Схемотехника
  • BOM
  • Топология платы