RF Double Balanced Mixers M-139, M-140, M-162 Datasheet

Category: Electronics, Merrimac Industries Inc, RF Microwave Devices

Overview of RF Double Balanced Mixers

The datasheet provides technical specifications for the M-139, M-140, and M-162 Double Balanced Mixers. These mixers are general-purpose devices designed to cover a wide frequency range from 1 MHz to 3000 MHz. They utilize lumped element circuits combined with toroidal transformers, maintaining high performance in a compact size.

Principal Specifications

The M-139 model operates within the 1 to 1000 MHz range, offering conversion losses ranging from 7.5 dB to 10.0 dB, third-order intercept points from +13 dBm to +19 dBm, and port isolation up to 12.0 dB in various frequency segments. It features positive polarity sense.

The M-140, covering a broader spectrum, functions from 10 to 3000 MHz. Conversion loss is between 8.0 dB and 9.0 dB, third-order intercept points range from +7 dBm to +19 dBm, and port isolation reaches up to 9.0 dB. This model demonstrates negative polarity sense for its supported frequency bands.

Lastly, the M-162 mixer works between 10 and 1500 MHz. It exhibits conversion losses between 7.0 dB and 9.5 dB, third-order intercept points from 0 dBm to +12 dBm, and isolation up to 8.5 dB, with positive polarity sense across its operational frequencies.

General Specifications

All the mentioned models share general specifications such as a nominal impedance of 50 ohms, a noise figure within +1 dB of the conversion loss, a typical DC offset voltage of 5 mV, and a nominal weight of 0.1 oz (2.8 g). They are capable of operating in temperatures ranging from -55°C to +85°C. These specifications are based on measurements in a 50-ohm system at nominal Local Oscillator (LO) Power, specifically in a down-converter application.

Package Outlines and Notes

The M-139 and M-140 share similar maximum dimensions for their IC and max outline. The M-162’s package outline has its own specific maximum dimensions and tolerances. The general notes under the package outlines section provide further detail on tolerances and measurement conventions used in the datasheet.

Conclusion

The datasheet details the high-performance capabilities of the M-139, M-140, and M-162 mixers for various RF applications, touting reliable operation across wide frequency ranges in a small footprint and with robust performance characteristics.