LT5511 Datasheet, PDF (1/16 Pages) Linear Technology – High Signal Level Upconverting Mixer

FEATURES
s _{Wide RF Output Frequency Range to 3000MHz}
s _{Broadband RF and IF Operation}
s _{+17dBm Typical Input IP3 (at 950MHz)}
s _{+6dBm IF Input for 1dB RF Output Compression}
s _{Integrated LO Buffer: –10dBm Drive Level}
s _{Single-Ended or Differential LO Input}
s _{Double-Balanced Mixer}
s _{Enable Function}
s _{Single 4.0V – 5.25V Supply Voltage Range}
s _{16-Pin TSSOP Exposed Pad Package}
U
APPLICATIO S
s _{CATV Downlink Infrastructure}
s _{Wireless Infrastructure}
s _{High Linearity Mixer Applications}
LT5511
High Signal Level
Upconverting Mixer
DESCRIPTIO
The LT^®5511 mixer is designed to meet the high linearity
requirements of cable TV infrastructure downstream trans-
mitters and wireless infrastructure transmit systems. The
IC includes a differential LO buffer amplifier driving a
double-balanced mixer. The LO, RF and IF ports can be
easily matched to a broad range of frequencies for differ-
ent applications. The high performance capability of the
LO buffer allows the use of a single-ended source, thus
eliminating the need for an LO balun.
The LT5511 mixer delivers +17dBm typical input 3rd
order intercept point at 950MHz, and +15.5dBm IIP3 at
1900MHz, with IF input signal levels of – 5dBm. The input
1dB compression point is typically +6dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
44MHz
MOD
ENABLE
LT5511
EN V_CCBIAS VCCLO
BIAS
IF⁺
RF⁺
IF^–
RF ^–
LO⁺
LO INPUT
994MHz
–10dBm
GND
LO^–
5511 F01a
V_CC
5V
950MHz
TO
DOWNMIXER
RF Output Power
and 3rd Order Intermodulation
vs Input Power (Two Input Tones)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–20
P_OUT
IM3
P_LO = –10dBm
f_RF1 = 950MHz
f_RF2 = 949MHz
T_A = 25°C
–15 –10 –5
0
5
IF INPUT POWER (dBm/TONE)
5511 F01b
Figure 1. High Signal Level Upmixer for CATV Downlink Infrastructure.
5511i
1