The MAX19994A dual-channel downconverter is designed to provide 8.4dB of conversion gain, +25dBm input IP3, +14dBm 1dB input compression point, and a noise figure of 9.8dB for 1200MHz to 2000MHz diversity receiver applications.
The MAX19994A is a dual‑channel SiGe mixer designed for 1200 MHz to 2000 MHz RF input. It provides 8.4 dB typical conversion gain, 9.8 dB typical noise figure, and supports both high‑ and low‑side LO injection architectures. The device includes two double‑balanced passive mixer cores, LO buffers, a selectable SPDT LO switch, and differential IF output amplifiers, all in a 36‑pin thin QFN package.
Typical applications include base‑station front‑ends for WCDMA/LTE, GSM/EDGE, cdma2000, and private mobile radios. The part is pin‑compatible with several Maxim mixers, allowing a common PCB layout across multiple frequency bands.
| RF Frequency Range | 1200 MHz to 2000 MHz |
|---|---|
| LO Frequency Range | 1450 MHz to 2050 MHz |
| Conversion Gain (typical) | 8.4 dB |
| Noise Figure (typical) | 9.8 dB |
| Input 3rd‑Order Intercept Point (IIP3) | 25 dBm |
| Input 1 dB Compression Point (typical) | +14 dBm |
| Supply Current (3.3 V) | 264 mA |
| LO Drive Level Range | -6 dBm to +3 dBm |
| Channel‑to‑Channel Isolation | 47 dB |
| 2LO‑2RF Spurious Rejection | 68 dBc |
The LO drive level can be set between –6 dBm and +3 dBm.
Typical conversion gain is 8.4 dB.
The RF input range is 1200 MHz to 2000 MHz.