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1GC1-4298 DC - 26.5 GHz Packaged Gilbert-Cell Mixer

Data Sheets

Keysight 1GC1-4298

DC - 26.5 GHz Packaged Gilbert-Cell Mixer

Features

  • DC to 26.5 GHz on RF and LO
  • DC to 1 GHz IF
  • Low conversion loss:
  • 4 dB typical
  • High input P -1 dB:
  • +9 dBm @ 10 GHz
  • +2 dBm @ 20 GHz
  • Single-supply operation:
  • Vsupply = –7 V
  • RoHS compliant
  • QFN SMT package

Description

The 1GC1-4298 offers substantially improved frequency range and improved broadband performance in a Gilbert–cell mixer. The 1GC1-4298 can be utilized as a fundamental, 3rd, 5th, or 7th order harmonic mixer. The mixer is fabricated using Keysight Technologies, Inc. GaAs HBT process, which provides excellent process uniformity, reliability, and 1/f noise performance. The 1GC1-4298 is available in a 3 mm x 3 mm quad flat - no leads (QFN) SMT package to preserve BW performance and save space on densely populated PC board designs.

Applications

The 1GC1-4298 is ideal for downconverting 0 to 20 GHz signals to an IF of 0 to 1 GHz. The 1GC1-4298 is particularly well suited for applications that require load–insensitive conversion loss, good spurious signal suppression, reasonable dynamic range, and low LO power over a wide bandwidth.

Biasing and Operation

The 1GC1-4298 requires a single –7 V power supply to VEE. Current will be approximately 81 mA.

Operation

The 1GC1-4298 does not require capacitors on any ports other than VEE. It is capable of operation (including pass– through operation) without connecting RFbar and LO bar. LO power can vary between -10 and 0 dBm. Pass–thru mode is available with LO bar held at a non–zero voltage – see the Pass–Thru mode S–parameter plot. For increased gain (S21b), hold LO bar positive; for decreased gain (S21a), hold LO bar negative. Recommended pass–thru LO bar voltage is ± 0.5 V, although voltages between ± 0.4 V and ±1 V are acceptable. These are dissipated through 55 ohms on–chip.

Temperature diode operation

High accuracy (bench process) With part mounted on a good heat sink, measure Vfwd with 1 mA of current from TD pad to ground (either polarity is ok) with backside at 25 °C, 45 °C, and 65 °C (or other temperature points as desired). One of these should be same as bias on case. Plot Vfwd vs. backside temperature and determine ΔV/ΔT. For these diodes, this value is ~1 mV / °C, and the plot should be very linear. Bias on part with desired backside temperature. Allow part to stabilize and measure Vfwd with 1 mA of current as before. Determine ΔT from calibration curve developed above. Collect data to determine ΔV/ΔT for date code under analysis. The variation part to part should be fairly small. In situ estimation (micro-circuit process) With part unbiased and micro-circuit temperature stabilized, measure Vfwd with 1 mA of current from TD pad to ground. Bias on part and measure Vfwd as before. Parts with good heat sink and good thermal path should have ΔT ~< 15 °C. Parts with poor heat sink or thermal path may have ΔT values of 60 °C or higher.

Moisture Compatibility

Injection mold components like the 1GC1-4298 in QFN are moisture-sensitive. The product is tested to the Moisture and Reflow Sensitivity Level 3 as per IPC/Jedec J-STD-020 and must be mounted within 168 hours of opening the shipping container. Store and handle parts for reflow and for rework per IPC/Jedec J-STD-033B. An example of the moisture sensitivity label is shown in Figure 2.

Tape and Reel

The 1GC1-4298 is available in tape and reel format to facilitate automatic pick and place manufacturing. See Figure 9.

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