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LT5515EUF#PBF

P1-P3P4-P6P7-P9P10-P12
LT5515
1
5515fa
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
The LT
®
5515 is a 1.5GHz to 2.5GHz direct conversion
quadrature demodulator optimized for high linearity re-
ceiver applications. It is suitable for communications
receivers where an RF signal is directly converted into I
and Q baseband signals with bandwidth up to 260MHz.
The LT5515 incorporates balanced I and Q mixers, LO
buffer amplifiers and a precision, high frequency quadra-
ture generator.
In an RF receiver, the high linearity of the LT5515 provides
excellent spur-free dynamic range, even with fixed gain
front end amplification. This direct conversion receiver
can eliminate the need for intermediate frequency (IF)
signal processing, as well as the corresponding require-
ments for image filtering and IF filtering. Channel filtering
can be performed directly at the outputs of the I and Q
channels. These outputs can interface directly to channel-
select filters (LPFs) or to a baseband amplifier.
■
Cellular/PCS/UMTS Infrastructure
■
High Linearity Direct Conversion I/Q Receiver
■
High Linearity I/Q Demodulator
■
RF Power Amplifier Linearization
■
Frequency Range: 1.5GHz to 2.5GHz
■
High IIP3: 20dBm at 1.9GHz
■
High IIP2: 51dBm at 1.9GHz
■
Noise Figure: 16.8dB at 1.9GHz
■
Conversion Gain: –0.7dB at 1.9GHz
■
I/Q Gain Mismatch: 0.3dB
■
I/Q Phase Mismatch: 1°
■
Shutdown Mode
■
16-Lead QFN 4mm × 4mm Package
with Exposed Pad
1.5GHz to 2.5GHz
Direct Conversion
Quadrature Demodulator
Figure 1. High Signal-Level I/Q Demodulator for Wireless Infrastructure
BPF
5V
V
CC
BPF
RF
+
RF
–
LPF
LT5515
I
OUT
+
I
OUT
–
0°
LO
+
LO INPUT
LO
–
ENENABLE
LPF
DSP
Q
OUT
+
Q
OUT
–
90°
0°/90°
5515 F01
LNA
VGA
VGA
I/Q Output Power, IM2, IM3
vs RF Input Power
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
RF INPUT POWER (dBm)
–16
P
OUT
, IM2, IM3 (dBm/TONE)
20
0
–20
–40
–60
–80
–100
–12
–8 –4 0
5515 • TA01
48
P
OUT
IM3
IM2
T
A
= 25°C
P
LO
= –5dBm
f
LO
= 1901MHz
f
RF1
= 1899.9MHz
f
RF2
= 1900.1MHz
LT5515
2
5515fa
Power Supply Voltage ............................................ 5.5V
Enable Voltage ...................................................... 0, V
CC
LO
+
to LO
–
Differential Voltage ............................... ±2V
(+10dBm Equivalent)
RF
+
to RF
–
Differential Voltage ................................ ±2V
(+10dBm Equivalent)
Operating Ambient Temperature ..............–40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
Maximum Junction Temperature .......................... 125°C
ORDER PART
NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT5515EUF
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
16 15 14 13
5 6 7 8
TOP VIEW
UF PACKAGE
16-LEAD (4mm × 4mm) PLASTIC QFN
EXPOSED PAD (PIN 17) IS GND,
MUST BE SOLDERED TO PCB
9
10
11
12
4
3
2
1GND
RF
+
RF
–
GND
V
CC
LO
–
LO
+
V
CC
I
OUT
+
I
OUT
–
Q
OUT
+
Q
OUT
–
V
CC
V
CM
EN
V
CC
17
T
JMAX
= 125°C, θ
JA
= 38°C/W
UF PART
MARKING
5515
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
T
A
= 25°C. V
CC
= 5V, f
RF1
= 1899.9MHz, f
RF2
= 1900.1MHz,
f
LO
= 1901MHz, P
LO
= –5dBm unless otherwise noted. (Notes 2, 3) (Test circuit shown in Figure 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Frequency Range 1.5 to 2.5 GHz
LO Power –10 to 0 dBm
Conversion Gain Voltage Gain, Load Impedance = 1k –3 –0.7 dB
Noise Figure 16.8 dB
Input 3rd Order Intercept 2-Tone, –10dBm/Tone, ∆f = 200kHz 20 dBm
Input 2nd Order Intercept 2-Tone, –10dBm/Tone, ∆f = 200kHz 51 dBm
Input 1dB Compression 9 dBm
Baseband Bandwidth 260 MHz
I/Q Gain Mismatch (Note 4) 0.3 0.7 dB
I/Q Phase Mismatch (Note 4) 1 deg
Output Impedance Differential 120 Ω
LO to RF Leakage – 46 dBm
RF to LO Isolation 46 dB
AC ELECTRICAL CHARACTERISTICS
LT5515
3
5515fa
DC ELECTRICAL CHARACTERISTICS
T
A
= 25°C. V
CC
= 5V unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage 4 5.25 V
Supply Current 95 125 160 mA
Shutdown Current EN = Low 20 µA
Turn-On Time 120 ns
Turn-Off Time 650 ns
EN = High (On) 1.6 V
EN = Low (Off) 1.3 V
EN Input Current V
ENABLE
= 5V 2 µA
Output DC Offset Voltage f
LO
= 1901MHz, P
LO
= –5dBm 4 25 mV
(
⏐I
OUT
+
– I
OUT
–
⏐, ⏐Q
OUT
+
– Q
OUT
–
⏐)
Output DC Offset Variation vs Temperature –40°C to 85°C30µV/°C
Note 3: Specifications over the –40°C to 85°C temperature range are
assured by design, characterization and correlation with statistical process
control.
Note 4: Measured at P
RF
= –5dBm and output frequency = 1MHz.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Tests are performed as shown in the configuration of Figure 2 with
R1 = 8.2Ω, unless otherwise noted.
P1-P3P4-P6P7-P9P10-P12

LT5515EUF#PBF

Mfr. #:
Buy LT5515EUF#PBF
Manufacturer:
Analog Devices Inc.
Description:
Modulator / Demodulator 1.5GHz - 2.5GHz Quadrature Demodulator
Lifecycle:
New from this manufacturer.
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