1821TH-S01BGA
18 GHz, 2GS/s Sample Rate, Clock Mode Select, 6mm BGA...

Applications

• Test instrumentation equipment, AT
• RF demodulation systems
• Radar
• Software radio
• Digital receiver systems
• High-speed DAC deglitching
• THA for differential ADCs
• Digital sampling oscilloscopes

Features

• 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

Description

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.

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