LTC5591_15 Datasheet, PDF (1/20 Pages) Linear Technology – Dual 1.3GHz to 2.3GHz High Dynamic Range Downconverting Mixer

Features
n _{Conversion Gain: 8.5dB at 1950MHz}
n _{IIP3: 26.2dBm at 1950MHz}
n _{Noise Figure: 9.9dB at 1950MHz}
n _{15.5dB NF Under 5dBm Blocking}
n _{High Input P1dB}
n _{47dB Channel-to-Channel Isolation}
n _{1.25W Power Consumption at 3.3V}
n _{Low Power Mode: <800mW Consumption}
n _{Independent Channel Shutdown Control}
n _{50Ω Single-Ended RF and LO Inputs}
n _{LO Input Matched In All Modes}
n _{0dBm LO Drive Level}
n _{Small Package and Solution Size}
n _{–40°C to 105°C Operation}
Applications
n _{3G/4G Wireless Infrastructure Diversity Receivers}
(LTE, W-CDMA, TD-SCDMA, UMTS, GSM1800)
n _{Remote Radio Unit}
n _{MIMO Multichannel Receivers}
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
LTC5591
Dual 1.3GHz to 2.3GHz
High Dynamic Range
Downconverting Mixer
Description
The LTC^®5591 is part of a family of dual-channel high dy-
namic range, high gain downconverting mixers covering
the 600MHz to 4.5GHz RF frequency range. The LTC5591
is optimized for 1.3GHz to 2.3GHz RF applications. The
LO frequency must fall within the 1.4GHz to 2.1GHz
range for optimum performance. A typical application is
a LTE or W-CDMA multichannel or diversity receiver with
a 1.7GHz to 2.2GHz RF input and low side LO.
The LTC5591’s high conversion gain and high dynamic
range enable the use of lossy IF filters in high selectivity
receiver designs, while minimizing the total solution cost,
board space and system-level variation. A low current
mode is provided for additional power savings and each
of the mixer channels has independent shutdown control.
High Dynamic Range Dual Downconverting Mixer Family
PART NUMBER
RF RANGE
LO RANGE
LTC5590
600MHz to 1.7GHz 700MHz to 1.5GHz
LTC5591
1.3GHz to 2.3GHz 1.4GHz to 2.1GHz
LTC5592
1.6GHz to 2.7GHz
1.7GHz to 2.5GHz
LTC5593
2.3GHz to 4.5GHz
2.1GHz to 4.2GHz
Typical Application
Wideband Receiver
1nF
190MHz
SAW
190MHz
BPF
V_CCIF
1nF
IF
3.3V or 5V
1µF
22pF ^{150nH 150nH}
AMP
ADC
RF
1920MHz TO
LNA
1980MHz
RF
1920MHz TO
LNA
1980MHz
V_CCIF
IFA⁺
IF A^–
IMAGE
BPF 2.7pF
IF
AMP
RFA
V_CCA
BIAS
LO
AMP
22pF
V_CC
1µF ^3.3V
ENA
ENA
(0V/3.3V)
4.7pF ^{LO 1760MHz}
LO
SYNTH
IMAGE
BPF 2.7pF
RFB
IFB⁺
150nH
22pF
LO
AMP
ENB
ENB
IF
AMP
IF B^–
BIAS
V_CCB
(0V/3.3V)
V_CC
150nH
22pF
1nF ^190MHz
190MHz
SAW
BPF
1nF
IF
AMP
ADC
5591 TA01a
Wideband Conversion Gain,
IIP3 and NF vs IF Frequency
(Mixer Only, Measured on
Evaluation Board)
11.0
28
10.5
26
10.0
LO = 1760MHz
P_LO = 0dBm
IIP3
24
9.5 ^{RF = 1950 ±30MHz}
22
TEST CIRCUIT IN FIGURE 1
9.0
20
8.5
18
G_C
8.0
16
7.5
14
7.0
12
NF
6.5
10
6.0
8
160 170 180 190 200 210 220
IF OUTPUT FREQUENCY (MHz)
5591 TA01b
5591f
1