• Supports 2 GS/s sampling rate
• 18 GHz input bandwidth (small-signal)
• 15 GHz input bandwidth (0.5 V p-p)
• 12 GHz input bandwidth (1 V p-p)
• THD < -60 dB (1 GHz 1 V p-p input)
• THD < -35 dB (10 GHz 0.5 V p-p input)
• Fast rise time: < 25 ps (10 - 90%)
• Ultralow aperture jitter: < 50 fs
• 0 dB Gain with up to 1 V p-p out
• Differential master-slave architecture
• Multiple clock modes
• Adjustable input termination voltage
• Single -5.2 V power supply
• Low power consumption: 1300 mW
• Small die size: 1.58 mm x 1.28 mm
• Available in packaged and die form
• Evaluation kit available

The 1821TH track-and-hold amplifier is designed for high precision sampling of wideband signals with multi-GHz frequency content. The master-slave architecture integrates two track-and-hold circuits, a 50-ohm differential output buffer, and clock mode selection logic.

Sample rates up to 2 GS/s are supported. Clocking modes include out-of-phase master-slave (M/S) clocking based on a single clock signal and independent M/S clocking based on two clock signals. The output is settled for nearly a complete clock cycle of the slave T/H.
Analog inputs are dc-coupled and terminated on-chip with 50 ohms to a user adjustable voltage. The 1821TH may be driven single-ended or differentially and provides differential outputs. A output buffer provides 0 dB overall THA gain range with up to 1 V p-p differential output swing into 50 ohms. Clock inputs are dc-coupled and terminated with 50 ohms to ground.

The 1821TH operates off a single -5.2 V power supply. It is available in a 0.8 mm pitch BGA package and in die form.

For more information about the 1821TH or other Inphi products, please click here and enter your email address for product downloads. New users, must first complete our product request form.