forward

LAN / WAN Test Equipment

Описание:
This reference design shows the ability of the high-speed amplifier, LMH6554, to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both AC and DC coupled applications while interfaced to the ADS4449 quad, 250-MSPS, 14-bit ADC. Various options for common-mode voltages, power supplies, and interfaces are discussed and measured to meet the requirements of a variety of applications. Anti-aliasing filter examples are shown along with the performance improvements that they provide.

Возможности:

High-speed single-ended to differential conversion while maintain excellent performance System performance results for LMH6554 driving ADS4449 SFDR > 82 dBFs, SNR > 71 dBFS in first Nyquist zone SFDR > 80 dBFs, SNR > 68 dBFS in second Nyquist zone Examples of both AC and DC coupled interfaces Demonstrates anti-aliasing filter design and performance gains Amplifier power supply design considerations for best performance are discussed

Документация:
  • Даташит
  • Схемотехника
  • BOM
  • Топология платы
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 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:
In TIDA-00684 reference design a quad-channel TSW3080 evaluation module (EVM) is developed to shows how to use an active amplifier interface with the DAC38J84 to demonstrate an arbitrary-waveform-generator frontend. The DAC38J84 provides four DAC channels with 16 bits of resolution with a maximum update rate of 2.5 GSPS. The THS3217 provides a wideband differential-to-single-ended output. The THS3095 provides a high dynamic range output of up to 26 VP-P. The LMH5401 provides a very wideband differential output. All of these paths provide a DC-coupled interface with the ability to drive 50 Ω at a high-performance level. The design also includes a reference transformer path for comparison purposes.
Возможности:

Wideband (500 MHz), DC-coupled active interface, capable of 5 Vp-p signal swing 50 MHz passband channel capable of 26 Vp-p signal swing Wideband (1.0 GHz), DC-coupled signal path All channels optimized for driving 50 ohms impedance loads Available onboard clocking with an option for external clocking

Документация:
  • Схемотехника
  • BOM
Описание:
A direct RF sampling receiver approach to a radar system operating in S-band is demonstrated using the ADC32RF45, 3-Gsps, 14-bit analog to digital converter (ADC). RF sampling reduces the complexity of a system by removing down conversion and using a high sampling rate enables wider signal bandwidths. The approach is demonstrated by building a receiver based on the ASR-11 air traffic control radar specifications.
Возможности:

S-band radar reference design using RF sampling architecture Example lineup analysis with RF sampling ADC Measurements to verify calculated performance Radar specific measurements with detection scheme Supports greater than 1-GHz instantaneous signal bandwidth

Документация:
  • Схемотехника
  • BOM
Описание:
The TIDA-01017 reference design demonstrates the performance of a clocking solution for a high speed multi-channel system, analyzed by measuring the channel to channel skew for the entire input frequency range of the RF sampling ADC. Channel to channel skew is critical for phased array radar and oscilloscope applications. The ADC12J4000 is a low power, 12-bit, 4-GSPS RF-sampling analog to digital converter (ADC) with a buffered analog input, integrated digital down Converter, features a JESD204B interface, and it captures signals up to 4GHz. This design showcases the clocking solution using the LMK04828, to achieve the synchronization between multiple ADC12J4000 signal chains using synchronized SYSREF.
Возможности:

Synchronization of multi-channel high speed ADCs RF sampling ADC clocking solution 4GHz high frequency input signal capture capability Low-phase noise clocking solution for RF sampling ACC

Документация:
  • Схемотехника
  • BOM
Описание:
The RF sampling architecture offers an alternative to the traditional super-heterodyne architecture. An RF sampling analog-to-digital converter (ADC) operates at a high sampling rate and converts signals directly from radio frequencies (RF) to digital. Because of the high sampling rate, the RF sampling architecture supports very wide signal bandwidths. Higher signal bandwidths increase the capacity of the system allowing for faster data transmission or greater user access. The reference design features the ADC32RF45 which is a dual channel,14-bit resolution ADC sampling up to 3-GSPS. The maximum signal bandwidth is set by the ADC sampling rate divided by two. With this reference design the signal bandwidth capability exceeds 1-GHz. The maximum input frequency is set by the input bandwidth of the input buffers of the ADC and the input transformers. This reference design allows direct capture of RF signals up to 4-GHz which is suitable for all of the key telecommunication bands and S-band RADAR applications. The design includes an optimized clocking solution for maintaining the JESD204B serialized data interface and achieving the highest signal-to-noise ratio (SNR) performance.

Возможности:

3-GSPS RF sampling ADC solution 1 -GHz and larger signal bandwidth capability Low noise, high dynamic range RF sampling receiver solution Low-phase noise clocking solution for RF sampling ADC

Документация:
  • Даташит
  • Схемотехника
  • BOM
  • Топология платы