+14dBm to +20dBm LO Buffers with ±1dB Variation
DescriptionThe MAX9989 and MAX9990 LO buffers provide the high output (+14dBm to +20dBm) necessary to drive the LO inputs of high-linearity passive mixers, while offering 40dB reverse isolation to prevent LO pulling. The MAX9989 is internally matched for the cellular/GSM bands, and the MAX9990 is matched for the DCS/PCS/UMTS bands.
The Typical Application Circuit provides a nominal +17dBm output power with ±1dB variation over supply, temperature, and input power. With two optional resistors, the output power can be precision set from +14dBm to +20dBm. The devices offer more than 35dB main driver output to PLL amp output isolation. Each device is offered in a 5mm x 5mm 20-pin thin QFN package with exposed paddle.
- Cellular/GSM/DCS/PCS/UMTS Base Station Tx/Rx LO Drive
- Coherent Receivers
- ISM Wireless LAN
- Local Multipoint Distribution Service
- Point-to-Point Systems
- Wireless Local Loop (WLL)
|Part Number||LO Driver Outputs||PLL Driver Outputs||RF Freq.|
(mm x mm)
|MAX9989||Yes||Yes||700||1100||14.3||19.7||4.75 to 5.25||105||5.0 x 5.0|
|See All VCO Buffers/Splitters (7)|
| Pricing Notes: |
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Technical DocumentsTutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
App Note 1917 Simplifying Tomorrow's LO Drive Designs with the MAX9987-90 Family of LO Buffers/Splitters
Quality and Environmental DataRequest Reliability Report for: MAX9990
Lead-Free Package Tin (Sn) Whisker Reports
|Device||Fab Process||Technology||Sample size||Rejects||FIT at 25°C||FIT at 55°C|
- 925MHz to 2175MHz Frequency Range
- Monolithic VCO
- High Dynamic Range: -75dBm to 0dBm