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Применения > Тестирование и измерение > Приборы > Сбор данных (DAQ) > Quad-Channel 250-Msps Digitizer with Variable Gain Amplifier Reference Design

Quad-Channel 250-Msps Digitizer with Variable Gain Amplifier Reference Design (TIDA-00094)

This reference design shows a quad channel, 14-bit, 250-Msps digitizer with wide input range using the LMH6881 programmable differential amplifier and ADS4449 quad-channel, 14-bit, 250-Msps ADC. This combination allows an input voltage range of approximately 1 Vpp to 100 uVpp (4 dBm to -75 dBm) while maintaining a minimum SNR of 6 dB. Performance versus input frequency is shown for both AC and DC coupled applications. 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

Gain range of 6-dB to 26-dB allows wide input voltage range of 100 uVpp to 1 Vpp Allows single-ended or differential input source SFDR > 77 dBFs, SNR > 71 dBFS Examples of both AC and DC coupled interfaces Demonstrates anti-aliasing filter design and performance gains Common mode voltage considerations for best performance are discussed

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Quad-Channel 250-Msps Digitizer with Variable Gain Amplifier Reference Design TIDA-00094

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