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LT5575EUF#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT5575
1
5575f
LO INPUT POWER (dBm)
–15
GAIN (dB), NF (dB), IIP3 (dBm)
IIP2 (dBm)
15
20
25
5
5575 TA01b
10
5
0
–10
–5
0
35
30
30
40
50
20
10
0
70
60
CONV
GAIN
DSB NF
IIP2
IIP3
–40°C
25°C
85°C
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
800MHz to 2.7GHz
High Linearity Direct Conversion
Quadrature Demodulator
The LT
®
5575 is an 800MHz to 2.7GHz direct conversion
quadrature demodulator optimized for high linearity
receiver applications. It is suitable for communications
receivers where an RF signal is directly converted into I
and Q baseband signals with bandwidth up to 490MHz.
The LT5575 incorporates balanced I and Q mixers, LO
buffer amplifi ers and a precision, high frequency quadrature
phase shifter. The integrated on-chip broadband transform-
ers provide 50Ω single-ended interfaces at the RF and LO
inputs. Only a few external capacitors are needed for its
application in an RF receiver system.
The high linearity of the LT5575 provides excellent spur-
free dynamic range for the receiver. This direct conversion
demodulator can eliminate the need for intermediate fre-
quency (IF) signal processing, as well as the corresponding
requirements for image fi ltering and IF fi ltering. Channel
fi ltering can be performed directly at the outputs of the I
and Q channels. These outputs can interface directly to
channel-select fi lters (LPFs) or to baseband amplifi ers.
High Signal-Level I/Q Demodulator for Wireless Infrastructure
■
Input Frequency Range: 0.8GHz to 2.7GHz*
■
50Ω Single-Ended RF and LO Ports
■
High IIP3: 28dBm at 900MHz, 22.6dBm at 1.9GHz
■
High IIP2: 54.1dBm at 900MHz, 60dBm at 1.9GHz
■
Input P1dB: 13.2dBm at 900MHz
■
I/Q Gain Mismatch: 0.04dB Typical
■
I/Q Phase Mismatch: 0.4° Typical
■
Low Output DC Offsets
■
Noise Figure: 12.8dB at 900MHz, 12.7dB at 1.9GHz
■
Conversion Gain: 3dB at 900MHz, 4.2dB at 1.9GHz
■
Very Few External Components
■
Shutdown Mode
■
16-Lead QFN 4mm × 4mm Package with
Exposed Pad
■
Cellular/PCS/UMTS Infrastructure
■
RFID Reader
■
High Linearity Direct Conversion I/Q Receiver
Conversion Gain, NF, IIP3 and IIP2
vs LO Input Power at 1900MHz
BPF
+5V
V
CC
BPF
RF
INPUT
RF
LPF
LT5575
I
OUT
+
I
OUT
–
0°
LO
LO INPUT
ENENABLE
LPF
Q
OUT
+
Q
OUT
–
90°
0°/90°
5575 TA01
LNA
VGA
VGA
A/D
A/D
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Operation over a wider frequency range is possible with reduced performance. Consult
the factory.
LT5575
2
5575f
DC ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage ..............................................5.5V
Enable Voltage ................................ –0.3V to V
CC
+ 0.3V
LO Input Power ....................................................10dBm
RF Input Power ....................................................20dBm
RF Input DC Voltage ...............................................±0.1V
LO Input DC Voltage ..............................................±0.1V
Operating Ambient Temperature ..............–40°C to 85°C
Storage Temperature Range ...................–65°C to 125°C
Maximum Junction Temperature .......................... 125°C
CAUTION: This part is sensitive to electrostatic discharge
(ESD). It is very important that proper ESD precautions
be observed when handling the LT5575.
(Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage
4.5 5.25 V
Supply Current
132 155 mA
Shutdown Current EN = Low < 1 100 µA
Turn On Time
120 ns
Turn Off Time 750 ns
EN = High (On) 2V
EN = Low (Off) 1V
EN Input Current V
ENABLE
= 5V 120 µA
Output DC Offset Voltage
(|I
OUT
+
– I
OUT
–
|, |Q
OUT
+
– Q
OUT
–
|)
f
LO
= 1900MHz, P
LO
= 0dBm < 9 mV
Output DC Offset Variation
vs Temperature
–40°C to 85°C 38 µV/°C
16 15 14 13
5 6 7 8
TOP VIEW
17
UF PACKAGE
16-LEAD
(
4mm × 4mm
)
PLASTIC QFN
9
10
11
12
4
3
2
1GND
RF
GND
GND
V
CC
GND
LO
GND
I
OUT
+
I
OUT
–
Q
OUT
+
Q
OUT
–
EN
V
CC
V
CC
V
CC
T
JMAX
= 125°C, θ
JA
= 37°C/W
EXPOSED PAD (PIN #17) IS GND, MUST BE SOLDERED TO PCB
V
CC
= +5V, T
A
= 25°C, unless otherwise noted. (Note 3)
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT5575EUF#PBF LT5575EUF#TRPBF 5575 16-Lead (4mm × 4mm) QFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
LT5575
3
5575f
AC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF Input Frequency Range No External Matching (High Band)
With External Matching (Low Band, Mid Band)
1.5 to 2.7
0.8 to 1.5
GHz
GHz
LO Input Frequency Range No External Matching (High Band)
With External Matching (Low Band, Mid Band)
1.5 to 2.7
0.8 to 1.5
GHz
GHz
Baseband Frequency Range
DC to 490 MHz
Baseband I/Q Output Impedance Single-Ended
65Ω// 5pF
RF Input Return Loss Z
O
= 50Ω, 1.5GHz to 2.7GHz,
Internally Matched
>10 dB
LO Input Return Loss Z
O
= 50Ω, 1.5GHz to 2.7GHz,
Internally Matched
>10 dB
LO Input Power –13 to 5 dBm
Test circuit shown in Figure 1. (Notes 2, 3)
AC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain Voltage Gain, R
LOAD
= 1kΩ
R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
3
4.2
3.5
2
dB
dB
dB
dB
Noise Figure (Double-Side Band, Note 4) R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
12.8
12.7
13.6
15.7
dB
dB
dB
dB
Input 3rd-Order Intercept R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
28
22.6
22.7
23.3
dBm
dBm
dBm
dBm
Input 2nd-Order Intercept R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
54.1
60
56
52.3
dBm
dBm
dBm
dBm
Input 1dB Compression R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
13.2
11.2
11
12.3
dBm
dBm
dBm
dBm
I/Q Gain Mismatch R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
0.03
0.01
0.04
0.04
dB
dB
dB
dB
I/Q Phase Mismatch R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
0.5
0.4
0.6
0.2
°
°
°
°
LO to RF Leakage R
F
= 900MHz (Note 5)
R
F
= 1900MHz
R
F
= 2100MHz
R
F
= 2500MHz
–60.8
–64.6
–60.2
–51.2
dBm
dBm
dBm
dBm
V
CC
= +5V, EN = High, T
A
= 25°C, P
RF
= –10dBm (–10dBm/tone for
2-tone IIP2 and IIP3 tests), Baseband Frequency = 1MHz (0.9MHz and 1.1MHz for 2-tone tests), P
LO
= 0dBm, unless otherwise noted.
(Notes 2, 3, 6)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT5575EUF#PBF

Mfr. #:
Buy LT5575EUF#PBF
Manufacturer:
Analog Devices Inc.
Description:
Modulator / Demodulator 800 MHz to 2.7GHz Direct I/Q Demodulator
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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