Track and Hold Amplifiers

Inphi offers the GigaTrack™ family of track and hold amplifier (THA) products supporting up to 18 GHz analog bandwidth for instrumentation, ATE, and military applications. These leading edge, standard setting devices provide ultra wide 18 GHz bandwidth that eliminates the need to down-convert the incoming analog signal to below 1 GHz before input to a broadband analog-to-digital converter (ADC). With the GigaTrack™ family, engineers can for the first time replace numerous components in high frequency data acquisition architectures with the Inphi THA coupled with a high sample rate ADC. As a result engineers experience a simpler, faster design cycle with lower overall costs allowing delivery of differentiated, high performance systems.

Key Features and Benefits

Industry-Leading Operating Range.  The GigaTrack™ family of track and hold (THA) devices extends the categories analog bandwidth to 18 GHz with 2 GS/s sampling rate opening new, innovative applications in very fast sampling oscilloscopes, direct conversion receivers in radios, radar or electronic warfare systems, all of which require analog-to-digital conversion of very high frequency signals. For lower performance applications the 13xx products provide 13 GHz and 1.5 GS/s performance.

Lowest Total Harmonic Distortion.  With best-in-class total harmonic distortion (-67 dB) and aperture jitter (<50 fs) these devices support improved ADC signal-to-noise ratio and BER figures leading GigaTrack™ family usage in highly sensitive and accurate acquisition systems.

Lowest Settling Time.  The GigaTrack™ family's leading edge settling time (<60 ps) maximizes timing margin to improve accuracy and performance.

Flexible Clock Modes. A master/slave (dual) track and hold architecture was developed in order to deliver a wider hold time window for the downstream broadband ADC. Depending on the device, a flexible clock mode select pin provides either a single differential clock or two independent differential clock inputs for both master and slave THA circuits. The dual THA enables lower quantization noise within the system by increasing the hold time window to almost one full cycle of the THA output while providing independent adjustment of phase and frequency.

Low Power Consumption.  The industry low 1.3 watt power consumption lowers your system power budget and allows the device to be offered in a plastic (QFN) package. A single supply voltage (-5.2V) requirement simplifies board layout and lowers cost.

Multiple Inputs.  The Inphi THAs can be driven either single-ended or differential. To lower system costs, the analog inputs are DC-coupled and terminated on-chip with 50 ohms to a user adjustable voltage. The clock inputs are differential only and internally terminated.

Multiple Packaging Options: The GigaTrack™ is offered in either a 49-pin 6mm BGA or a 28-pin 4mm QFN packaging. The 1821TH is offered in die form.

Track and Hold Amplifiers

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