LT5512 Datasheet PDF - Linear Technology

www.Datasheet-PDF.com

LT5512
Linear Technology

Part Number LT5512
Description 1kHz-3GHz High Signal Level Down-Converting Mixer
Page 12 Pages


LT5512 datasheet pdf
Download PDF
LT5512 pdf
View PDF for Mobile

No Preview Available !

LT5512www.DataSheet4U.com
1kHz-3GHz High Signal Level
Down-Converting Mixer
FEATURES
s Broadband RF, LO and IF Operation
s High Input IP3: +21dBm at 900MHz
+17dBm at 1900MHz
s Typical Conversion Gain: 1dB at 1900MHz
s SSB Noise Figure: 11dB at 900MHz
14dB at 1900MHz
s Integrated LO Buffer: Insensitive to LO Drive Level
s Single-Ended or Differential LO Signal
s High LO-RF Isolation
s Enable Function
s 4.5V to 5.25V Supply Voltage Range
s 4mm × 4mm QFN Package
U
APPLICATIO S
s Cellular/PCS/UMTS Infrastructure
s CATV Downlink Infrastructure
s High Linearity Mixer Applications
s ISM Band Receivers
DESCRIPTIO
The LT®5512 is a broadband mixer IC optimized for high
linearity downconverter applications including cable and
wireless infrastructure. The IC includes a differential LO
buffer amplifier driving a double-balanced mixer. An inte-
grated RF buffer amplifier improves LO-RF isolation and
eliminates the need for precision external bias resistors.
The LT5512 is a high-linearity alternative to passive diode
mixers. Unlike passive mixers, which have conversion
loss and require high LO drive levels, the LT5512 delivers
conversion gain and requires significantly lower LO drive
levels.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
High Signal-Level Downmixer for Wireless Infastructure
1850MHz
TO
1910MHz
1850MHz
TO
1910MHz
LNA
1:2
1.5pF
100pF
5V
1µF
EN VCC1 VCC2
RF+ LT5512
IF+
IF
RF
70MHz
220nH (TYP)
100pF
IF
VGA
8.2pF
220nH
LTC1748
ADC
LO+ LO–
LO
INPUT
–10dBm
5.6nH
100pF
100pF
5512 F01a
Output IF Power and Output IM3 vs
RF Input Power (Two Input Tones)
10
0
–10 IFOUT
–20
–30
IM3
–40
–50
–60
–70
–80
–21 –18 –15 –12 –9
TA = 25°C
PLO = –10dBm
fLO = 1830MHz
fRF1 = 1899.9MHz
fRF2 = 1900.1MHz
–6 –3 0 3 6
RF INPUT POWER (dBm/TONE)
5512 F01b
5512f
1



No Preview Available !

LT5512
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage ....................................................... 5.5V
Enable Voltage ............................... –0.3V to VCC + 0.3V
LO+ to LODifferential Voltage ............................ ±1.5V
................................................... (+6dBm equivalent)
RF+ to RFDifferential Voltage ............................. ±0.7V
.................................................. (+10dBm equivalent)
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
Junction Temperature (TJ)................................... 125°C
www.DataSheet4U.com
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
16 15 14 13
NC 1
12 GND
RF+ 2
11 IF+
17
RF3
10 IF
NC 4
9 GND
5678
ORDER PART
NUMBER
LT5512EUF
PART MARKING
UF PACKAGE
16-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD IS GROUND (PIN 17)
(MUST BE SOLDERED TO PCB)
5512
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
RF Input Frequency Range2
LO Input Frequency Range2
IF Output Frequency Range2
CONDITIONS
Requires Appropriate Matching
Requires Appropriate Matching
Requires Appropriate Matching
MIN TYP MAX
0.001 to 3000
0.001 to 3000
0.001 to 2000
UNITS
MHz
MHz
MHz
Downmixer Application: (Test Circuit Shown in Figure 2) VCC = 5VDC, EN = High, TA = 25°C, PRF = –10dBm (–10dBm/tone for two-tone
IIP3 tests, f = 200kHz), fLO = fRF – 170MHz, PLO = –10dBm, IF output measured at 170MHz, unless otherwise noted. (Notes 2, 3)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Conversion Gain
fRF = 900MHz
fRF = 1900MHz
0
–1 1
dB
dB
Conversion Gain vs Temperature
Input 3rd Order Intercept
TA = – 40°C to 85°C
fRF = 900MHz
fRF = 1900MHz
– 0.011
21
17
dB/°C
dBm
dBm
Single-Sideband Noise Figure
fRF = 900MHz
fRF = 1900MHz
11 dB
14 dB
LO to RF Leakage
fLO = 730MHz
fLO = 1730MHz
–60 dBm
–53 dBm
LO to IF Leakage
fLO = 730MHz and 1730MHz
–46 dBm
RF to LO Isolation
fRF = 900MHz
fRF = 1900MHz
57 dB
50 dB
2RF-2LO Output Spurious Product
(fRF = fLO + fIF/2)
3RF-3LO Output Spurious Product
(fRF = fLO + fIF/3)
900MHz: fRF = 815MHz at –12dBm
1900MHz: fRF = 1815MHz at –12dBm
900MHz: fRF = 786.67MHz at –12dBm
1900MHz: fRF = 1786.67MHz at –12dBm
–66 dBc
–59 dBc
–83 dBc
–58 dBc
Input 1dB Compression
fRF = 900MHz
fRF = 1900MHz
10.1 dBm
6.2 dBm
5512f
2



No Preview Available !

LT5512www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS 1230MHz Cable Infrastructure Downmixer Application: (Test Circuit Shown
in Figure 3) VCC = 5VDC, EN = High, TA = 25°C, RF input = 1230MHz at –10dBm, LO input swept from 1500MHz to 2100MHz,
PLO = –10dBm, IF output measured from 270MHz to 870MHz, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Conversion Gain
Input 3rd Order Intercept
LO to RF Leakage
fLO = 1800MHz, fIF = 570MHz
2-Tone RF Input, –10dBm/Tone, f = 1MHz,
fLO = 1800MHz, fIF = 570MHz
2.8 dB
17.9 dBm
–56 dBm
LO to IF Leakage
– 40 dBm
RF to LO Isolation
51 dB
2RF – LO Output Spurious Product
Single-Sideband Noise Figure
fIF = 570MHz, PRF = –18dBm, fLO = 1800MHz – 60 dBc
fLO = 1800MHz, fIF = 570MHz
13.3 dB
DC ELECTRICAL CHARACTERISTICS (Test Circuit Shown in Figure 2) VCC = 5VDC, EN = High, TA = 25°C
(Note 3), unless otherwise noted.
PARAMETER
Enable (EN) Low = Off, High = On
Turn On Time
Turn Off Time
Input Current
Enable = High (On)
Enable = Low (Off)
Power Supply Requirements (VCC)
Supply Voltage
Supply Current
Shutdown Current
CONDITIONS
VENABLE = 5VDC
EN = Low
MIN TYP MAX UNITS
3
13
50
3
0.3
4.50 5.25
57 74
100
µs
µs
µA
VDC
VDC
VDC
mA
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: External components on the final test circuit are optimized for
operation at fRF = 1900MHz, fLO = 1730MHz and fIF = 170MHz (Figure 2).
Note 3: Specifications over the –40°C to 85°C temperature range are
assured by design, characterization and correlation with statistical process
controls.
TYPICAL PERFOR A CE CHARACTERISTICS (Test Circuit Shown in Figure 2)
Supply Current vs Supply Voltage
59
58
57 TA = 85°C
56
55 TA = 25°C
54
53 TA = –40°C
52
51
50
49
4.5
4.75 5.0 5.25
SUPPLY VOLTAGE (V)
5.5
5512 G01
Shutdown Current vs Supply Voltage
100
10 TA = 85°C
TA = 25°C
1
TA = –40°C
0.1
4.5
4.75 5.0 5.25
SUPPLY VOLTAGE (V)
5.5
5512 G02
5512f
3



No Preview Available !

LT5512
www.DataSheet4U.com
TYPICAL PERFOR A CE CHARACTERISTICS (1900MHz Downmixer Application)
VCC = 5VDC, EN = High, TA = 25°C, 1900MHz RF input matching, RF input = 1900MHz at –10dBm, LO input = 1730MHz at –10dBm, IF
output measured at 170MHz, unless otherwise noted. (Test circuit shown in Figure 2).
Conv Gain, IIP3 and SSB NF vs
RF Frequency (Low-Side LO)
18
16 IIP3
14
SSB NF
12
10
8 fIF = 170MHz
6 TA = 25°C
4
2 CONV GAIN
0
1700
1800
1900
2000
RF FREQUENCY (MHz)
2100
5512 • G03
Conv Gain and IIP3 vs
LO Input Power
20
18 TA = 25°C
16
IIP3
14
TA = –40°C
TA = 85°C
12
10
8
6
CONV GAIN
4
TA = –40°C
2
TA = 25°C TA = 85°C
0
–18 –16 –14 –12 –10 –8 –6 –4 –2
LO INPUT POWER (dBm)
5512 • G06
Conv Gain and IIP3 vs
Supply Voltage
18
16 TA = 25°C
TA = –40°C
14
IIP3
12
TA = 85°C
10
8
6
CONV GAIN
4
TA = –40°C
2
TA = 25°C
TA = 85°C
0
4.5
4.75 5.0 5.25
SUPPLY VOLTAGE (V)
5.5
5512 • G09
4
Conv Gain, IIP3 and SSB NF vs
RF Frequency (High-Side LO)
18
16 IIP3
14
SSB NF
12
10 fIF = 170MHz
TA = 25°C
8
6
4
2 CONV GAIN
0
1700
1800
1900
2000
RF FREQUENCY (MHz)
2100
5512 • G04
SSB Noise Figure vs
LO Input Power
16.0
fRF = 1900MHz
15.5 fIF = 170MHz
TA = 25°C
15.0
14.5 HIGH-SIDE LO
14.0
LOW-SIDE LO
13.5
13.0
12.5
12.0
–18 –16 –14 –12 –10 –8 –6 –4 –2
LO INPUT POWER (dBm)
5512 • G07
Output IF Power and Output IM3 vs
RF Input Power (Two Input Tones)
10
0 TA = –40°C
–10 POUT
TA = 85°C
–20
–30 TA = 25°C
TA = 85°C
–40
–50
–60 IM3 TA = –40°C
–70
TA = 25°C
–80
–90
–21 –18 –15 –12 –9 –6 –3 0
RF INPUT POWER (dBm/TONE)
3
5512 G10
Conv Gain and IIP3 vs Temperature
RF = 1900MHz, IF = 170MHz
20
18 IIP3
16
LOW-SIDE LO
14 HIGH-SIDE LO
12
10
8
6
CONV GAIN
4
HIGH-SIDE LO
2
LOW-SIDE LO
0
–50 –25 0 25
50
75 100
TEMPERATURE (°C)
5512 • G05
LO-IF and LO-RF Leakage vs
LO Input Power
–20
fLO = 1730MHz
–25 TA = 25°C
–30
–35
–40 LO-IF
–45
–50
LO-RF
–55
–60
–18 –16 –14 –12 –10 –8 –6 –4 –2
LO INPUT POWER (dBm)
5512 • G08
RF, LO and IF Port Return Loss
vs Frequency
0
–5
LO
–10
–15
IF
–20
–25
RF
–30
0
TA = 25°C
500 1000 1500 2000 2500 3000
FREQUENCY (MHz)
5512 G11
5512f



LT5512 datasheet pdf
Download PDF
LT5512 pdf
View PDF for Mobile


Related : Start with LT551 Part Numbers by
LT5511 High Signal Level Upconverting Mixer LT5511
Linear Technology
LT5511 pdf
LT5512 1kHz-3GHz High Signal Level Down-Converting Mixer LT5512
Linear Technology
LT5512 pdf
LT5514 Ultralow Distortion IF Amplifier/ADC Driver LT5514
Linear Technology
LT5514 pdf
LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator LT5515
Linear Technology
LT5515 pdf
LT5516 800MHz to 1.5GHz Direct Conversion Quadrature Demodulator LT5516
Linear Technology
LT5516 pdf
LT5517 14-Bit 80Msps Low Power 3V ADC LT5517
Linear Technology
LT5517 pdf
LT5518 1.5GHz - 2.4GHz High Linearity Direct Quadrature Modulator LT5518
Linear Technology
LT5518 pdf
LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer LT5519
Linear Technology
LT5519 pdf

Index :   0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   

This is a individually operated, non profit site. If this site is good enough to show, please introduce this site to others.
Since 2010   ::   HOME   ::   Contact