The MAX19998 is a high-linearity downconversion mixer from Maxim that operates from 2300MHz to 4000MHz and supports 2.5GHz and 3.5GHz applications. The device features a double-balanced passive mixer core, an IF amplifier, and an LO buffer. It also integrates RF and LO input baluns. The MAX19998 requires a nominal LO drive of 0dBm and consumes a typical current of 230mA at VCC = 5.0V or 150mA at VCC = 3.3V.
The MAX19998 is a SiGe high‑linearity down‑conversion mixer offering 8.7 dB conversion gain, 9.7 dB noise figure and a wide RF range of 2300 MHz to 4000 MHz. It integrates a double‑balanced passive mixer core, IF amplifier, LO buffer and on‑chip baluns, and is available in a 20‑pin thin QFN‑EP package.
The device supports both low‑side and high‑side LO injection with LO frequencies from 2600 MHz to 4300 MHz, and operates from a 3.3 V or 5 V supply with typical currents of 150 mA or 230 mA respectively. Detailed absolute maximum ratings, electrical characteristics and thermal considerations are provided for reliable PCB design.
| RF Frequency Range | 2300 MHz – 4000 MHz |
|---|---|
| LO Frequency Range | 2600 MHz – 4300 MHz |
| IF Frequency Range | 50 MHz – 500 MHz |
| Conversion Gain | 8.7 dB |
| Noise Figure | 9.7 dB |
| Typical Input IP3 | +24.3 dBm |
| Typical Input 1 dB Compression Point | +11.3 dBm |
| Supply Current (3.3 V) | 150 mA |
| Package Type | 20‑pin Thin QFN‑EP |
The device is guaranteed from –40 °C to +85 °C.
Supply voltage should be between 4.75 V and 5.25 V (typical 5.0 V).
Yes, it is pin compatible with the MAX19996/MAX19996A family and pin similar to the MAX9984/MAX9986 series.