LT5515EUF Linear Technology, LT5515EUF Datasheet

IC DEMODULATOR QUADRATURE 16-QFN

LT5515EUF

Manufacturer Part Number
LT5515EUF
Description
IC DEMODULATOR QUADRATURE 16-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT5515EUF

Function
Demodulator
Lo Frequency
1.5GHz ~ 2.5GHz
Rf Frequency
1.5GHz ~ 2.5GHz
P1db
9dBm
Gain
-0.7dB
Noise Figure
16.8dB
Current - Supply
160mA
Voltage - Supply
4 V ~ 5.25 V
Package / Case
16-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
LT5515EUF
Manufacturer:
LT
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LT5515EUF
Quantity:
150
Part Number:
LT5515EUF#PBF
Manufacturer:
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Part Number:
LT5515EUF#PBF
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Part Number:
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Manufacturer:
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Quantity:
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APPLICATIO S
FEATURES
TYPICAL APPLICATIO
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
Cellular/PCS/UMTS Infrastructure
High Linearity Direct Conversion I/Q Receiver
High Linearity I/Q Demodulator
RF Power Amplifier Linearization
BPF
LNA
Figure 1. High Signal-Level I/Q Demodulator for Wireless Infrastructure
LO INPUT
ENABLE
BPF
U
RF
RF
LO
LO
EN
+
+
U
0°/90°
V
5V
CC
90°
LT5515
I
I
Q
Q
OUT
OUT
OUT
OUT
+
+
DESCRIPTIO
All other trademarks are the property of their respective owners.
The LT
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.
Quadrature Demodulator
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
LPF
LPF
®
VGA
VGA
5515 is a 1.5GHz to 2.5GHz direct conversion
DSP
5515 F01
Direct Conversion
U
1.5GHz to 2.5GHz
–100
– 20
– 40
– 60
– 80
20
0
–16
I/Q Output Power, IM2, IM3
–12
vs RF Input Power
RF INPUT POWER (dBm)
– 8
– 4
LT5515
P
OUT
T
P
f
f
f
LO
RF1
RF2
A
LO
0
= 25°C
= 1901MHz
= –5dBm
IM3
= 1899.9MHz
= 1900.1MHz
IM2
4
5515 • TA01
5515fa
1
8

Related parts for LT5515EUF

LT5515EUF Summary of contents

Page 1

... 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 baseband amplifier. LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners ...

Page 2

... Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges 25° 5V CONDITIONS Voltage Gain, Load Impedance = 1k 2-Tone, –10dBm/Tone, ∆f = 200kHz 2-Tone, –10dBm/Tone, ∆f = 200kHz (Note 4) (Note 4) Differential U W TOP VIEW ORDER PART NUMBER LT5515EUF – PART MARKING ...

Page 3

DC ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Supply Current Shutdown Current Turn-On Time Turn-Off Time EN = High (On Low (Off) EN Input Current Output DC Offset Voltage + – + – ⏐ ⏐ ⏐ ⏐ – ...

Page 4

LT5515 W U TYPICAL PERFOR A CE CHARACTERISTICS (Test circuit optimized for 1.9GHz operation as shown in Figure 2) Supply Current vs Supply Voltage 170 150 T = 85°C A 130 T = 25°C A 110 T = – 40°C ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS (Test circuit optimized for 1.9GHz operation as shown in Figure 2) IIP2 vs LO Input Power 1901MHz – 40°C A ...

Page 6

LT5515 CTIO S GND (Pins 1, 4): Ground Pin. + – (Pins 2, 3): Differential RF Input Pins. These pins are internally biased to 1.54V. They must be driven with a differential ...

Page 7

TEST CIRCUITS I OUT I OUT T1 LDB311G9020C-452 10nH 3 4 C17 C1 100pF 100pF Figure 2. Evaluation Circuit Schematic for 1900MHz PCS/UMTS Application Figure 3. Topside of Evaluation Board J3 J5 – C18 ...

Page 8

LT5515 U U APPLICATIO S I FOR ATIO The LT5515 is a direct I/Q demodulator targeting high linearity receiver applications, including wireless infra- structure. It consists amplifier, I/Q mixers, a quadrature LO carrier generator and bias circuitry. ...

Page 9

U U APPLICATIO S I FOR ATIO Table 2 shows the differential input impedance of the LO input port. Table 2. LO Input Differential Impedance FREQUENCY DIFFERENTIAL INPUT (GHz) IMPEDANCE (Ω) 1.5 69.3-j59.4 1.6 64.3-j56.4 1.7 60.0-j52.7 1.8 56.4-j48.9 1.9 ...

Page 10

LT5515 U U APPLICATIO S I FOR ATIO LDB311G9010C-440 12nH 3 4 – 1nF NOTE: NO CONNECTION REQUIRED ACCORDING TO BALUN ...

Page 11

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 16-Lead Plastic QFN (4mm × ...

Page 12

... Dynamic Range, Temperature Compensated, 2. Supply SC70 Package 36dB Dynamic Range, SC70 Package RF Output to 3GHz, 17dBm IIP3, Integrated LO Buffer DC-3GHz, 20dBm IIP3, Integrated LO Buffer 21.5dBm IIP3, Integrated LO Quadrature Generator www.linear.com ● 5515fa LT 0406 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 ...

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