LT5521
LT5521 is Very High Linearity Active Mixer manufactured by Linear Technology.
Features s Wideband Output Frequency Range to 3.7GHz s +24.2d Bm IIP3 at 1.95GHz RF Output s Low LO Leakage:
- 42d Bm s Integrated LO Buffer: Low LO Drive Level s Single-Ended LO Drive s Wide Single Supply Range: 3.15V to 5.25V s Double-Balanced Active Mixer s Shutdown Function s 16-Lead (4mm × 4mm) QFN Package
U APPLICATIO S s Cellular, W-CDMA, PHS and UMTS Infrastructure s Cable Downlink Infrastructure s Wireless Infrastructure s Fixed Wireless Access Equipment s High Linearity Mixer Applications
Very High Linearity Active Mixer
DESCRIPTIO
The LT®5521 is a very high linearity mixer optimized for low distortion and low LO leakage applications. The chip includes a high speed LO buffer with single-ended input and a double-balanced active mixer. The LT5521 requires only
- 5d Bm LO input power to achieve excellent distortion and noise performance, while reducing external drive circuit requirements. The LO buffer is internally 50Ω matched for wideband operation.
With a 250MHz input, a 1.7GHz LO and a 1.95GHz output frequency, the mixer has a typical IIP3 of +24.2d Bm,
- 0.5d B conversion gain and a 12.5d B noise figure.
The LT5521 offers exceptional LO-RF isolation, greatly reducing the need for output filtering to meet LO suppression requirements.
The device is designed to work over a supply voltage range from 3.15V to 5.25V.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
IF INPUT
BPF 1n F 10p F
1n F
1:1
110Ω IN+
6.8p F IN-
LO INPUT
- 5d Bm 6.8p F LO GND
OUT+
OUT-
110Ω
BIAS EN VCC VCC VCC
2.7n H
4:1
2.7n H 1n F
5V DC...
