器件名称: U2891B
功能描述: 2.5 GHz Quadrature Up-Converter
文件大小: 64.45KB 共6页
简 介:TELEFUNKEN Semiconductors
U2891B
2.5 GHz Quadrature Up-Converter
Description
The U2891B is a silicon monolithic IC made with TELEFUNKEN’s advanced UHF process. The IC consists of a 500 MHz I/Q quadrature modulator and a 2.5 GHz mixer. Both parts can be connected via an external filter in order to suppress harmonics and spurious products. The device features 3 V operation, a low current consumption and furthermore two separate power-down functions for modulator and mixer. The RF ports are single ended and the device can be operated adjustment free, but for optimization also two pins for phase adjustment are provided. These features and the double conversion concept of U2891B make this device perfectly suited for all digital radio applications from 900 MHz up to 2.5 GHz (e.g., GSM, DCS 1800, JDC, PHP and WLAN).
D Low power consumption: 25 mA / 3 V (typical at –8 dBm output level) D 2.5 GHz output frequency D Excellent sideband suppression by means of duty cycle regeneration and 90° phase control D Separate power-down mode for modulator and mixer D Low LO input level: – 10 dBm (typical) D LO and RF port 50-W single-ended
D Extended talk time due to increased battery life D Few external components results in cost and board space saving D Adjustment free, hence saves time and cost D One TX Platform for different systems D Reduced costs and space for battery (3-V operation) Case: SSO-24 package Ordering Information: U2891B-AFS, U2891B-AFSG3 (see page 5)
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