UMS RF Down Converters 7–86GHz | CHR Series RFQ
Mfr. Part #：CHR1080a98F / CHR2295-99F / CHR2411-QDG / CHR2421-QEG / CHR3352-QEG / CHR3362-QEG / CHR3364-QEG / CHR3394-QEG / CHR3662-QDG / CHR3663-QEG / CHR3664-QEG
Manufacturer：UMS / United Monolithic Semiconductors
Package/Case：Die, QFN
Description：UMS RF down converters cover frequencies from 7 GHz to 86 GHz for microwave and millimeter-wave receiver designs. The portfolio includes broadband integrated down converters, dual-channel receivers and multifunction RX devices in Die and QFN formats.Available models support X-, Ku-, K-, Ka-, Q- and E-band systems, with conversion gain up to 23 dB and noise figure as low as 2.7 dB. Typical uses include radar receivers, satellite communication terminals, point-to-point radio, electronic warfare and RF test equipment.
UMS Down Converter Selection
| Part Number | Description | RF Range | Conversion Gain | IF Bandwidth | LO Range | Noise Figure | P-1dB IN | Bias | Package |
| CHR1080a98F | E-Band Down Converter | 71–86 GHz | 8 dB | DC–12 GHz | 34.5–44 GHz | 5 dB | −10 dBm | 3.5 V, 175 mA | Die |
| CHR2295-99F | Integrated Down Converter | 24–30 GHz | 11 dB | DC–1.5 GHz | 12–15 GHz | 3.5 dB | −10 dBm | 3.5 V, 120 mA | Die |
| CHR2411-QDG | RX Multifunction IC | 22–24.5 GHz | 23 dB | DC–1 MHz | 22–24.5 GHz | 7 dB | −21 dBm | 5 V, 60 mA | QFN |
| CHR2421-QEG | Dual RX Channel | 23.75–24.5 GHz | 22 dB | DC–1 MHz | 23.75–24.5 GHz | 7 dB | −20 dBm | 5 V, 165 mA | QFN |
| CHR3352-QEG | Integrated Down Converter | 12–16 GHz | 13 dB | DC–3.5 GHz | 8.5–19.5 GHz | 2.7 dB | −6 dBm | 4 V, 250 mA | QFN |
| CHR3362-QEG | Integrated Down Converter | 10–16 GHz | 13 dB | DC–3.5 GHz | 6.5–19.5 GHz | 3.2 dB | −6 dBm | 4 V, 310 mA | QFN |
| CHR3364-QEG | Integrated Down Converter | 17–24 GHz | 11 dB | DC–3.5 GHz | 6.5–14 GHz | 2.7 dB | −7 dBm | 4 V, 320 mA | QFN |
| CHR3394-QEG | Q-Band Down Converter | 37–40 GHz | 13 dB | DC–3.5 GHz | 17.5–21 GHz | 3.5 dB | −7 dBm | 4 V, 250 mA | QFN |
| CHR3662-QDG | Broadband Down Converter | 7–16 GHz | 13 dB | DC–3.5 GHz | 4.5–19.5 GHz | 3 dB | −8 dBm | 4.5 V, 280 mA | QFN |
| CHR3663-QEG | Integrated Down Converter | 17–24 GHz | 11 dB | DC–3.5 GHz | 7–14 GHz | 3.5 dB | −5 dBm | 4.5 V, 380 mA | QFN |
| CHR3664-QEG | Broadband Down Converter | 17–27 GHz | 12 dB | DC–3.5 GHz | 7–15 GHz | 3.3 dB | −8 dBm | 4 V, 320 mA | QFN |
Product Selection Guide
For E-band receivers operating above 70 GHz, the CHR1080a98F provides 71–86 GHz coverage in Die form. The CHR2295-99F targets 24–30 GHz designs requiring a compact millimeter-wave down-converter Die.
For X- and Ku-band receivers, the CHR3352, CHR3362 and CHR3662 families provide QFN-packaged options with wide LO and IF coverage. The CHR3364, CHR3663 and CHR3664 support K- and Ka-band receiver designs, while the CHR3394-QEG is intended for 37–40 GHz Q-band systems.
The CHR2411-QDG and CHR2421-QEG are specialized receiver ICs for narrowband 24 GHz applications rather than conventional broadband down converters.
Typical Applications
Microwave and millimeter-wave receivers
Radar and phased-array systems
Satellite communication terminals
Point-to-point radio links
Electronic warfare receivers
RF and microwave test equipment
Frequently Asked Questions
Q1: Which model covers the highest RF frequency?
The CHR1080a98F covers 71–86 GHz, making it suitable for E-band receiver and communication systems.
Q2: Which UMS down converters have the lowest noise figure?
The CHR3352-QEG and CHR3364-QEG specify a 2.7 dB noise figure. They cover 12–16 GHz and 17–24 GHz respectively.
Q3: What is the difference between CHR3364-QEG and CHR3663-QEG?
Both cover 17–24 GHz with 11 dB conversion gain. The CHR3364-QEG operates from a 4 V supply and specifies a 2.7 dB noise figure, while the CHR3663-QEG uses 4.5 V and specifies a 3.5 dB noise figure.
Q4: Which model provides the widest K/Ka-band coverage?
The CHR3664-QEG covers 17–27 GHz, providing wider RF bandwidth than the 17–24 GHz CHR3364-QEG and CHR3663-QEG.
Q5: How do CHR2411-QDG and CHR2421-QEG differ?
The CHR2411-QDG is a single RX multifunction IC covering 22–24.5 GHz. The CHR2421-QEG integrates dual receive channels and covers 23.75–24.5 GHz.
