LT5511 Datasheet PDF - Linear Technology

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LT5511
Linear Technology

Part Number LT5511
Description High Signal Level Upconverting Mixer
Page 16 Pages


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FEATURES
s Wide RF Output Frequency Range to 3000MHz
s Broadband RF and IF Operation
s +17dBm Typical Input IP3 (at 950MHz)
s +6dBm IF Input for 1dB RF Output Compression
s Integrated LO Buffer: –10dBm Drive Level
s Single-Ended or Differential LO Input
s Double-Balanced Mixer
s Enable Function
s Single 4.0V – 5.25V Supply Voltage Range
s 16-Pin TSSOP Exposed Pad Package
U
APPLICATIO S
s CATV Downlink Infrastructure
s Wireless Infrastructure
s High Linearity Mixer Applications
LT5511www.DataSheet4U.com
High Signal Level
Upconverting Mixer
DESCRIPTIO
The LT®5511 mixer is designed to meet the high linearity
requirements of cable TV infrastructure downstream trans-
mitters and wireless infrastructure transmit systems. The
IC includes a differential LO buffer amplifier driving a
double-balanced mixer. The LO, RF and IF ports can be
easily matched to a broad range of frequencies for differ-
ent applications. The high performance capability of the
LO buffer allows the use of a single-ended source, thus
eliminating the need for an LO balun.
The LT5511 mixer delivers +17dBm typical input 3rd
order intercept point at 950MHz, and +15.5dBm IIP3 at
1900MHz, with IF input signal levels of – 5dBm. The input
1dB compression point is typically +6dBm.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
44MHz
MOD
ENABLE
LT5511
EN VCCBIAS VCCLO
BIAS
IF+
RF+
IFRF
LO+
LO INPUT
994MHz
–10dBm
GND
LO
5511 F01a
VCC
5V
950MHz
TO
DOWNMIXER
RF Output Power
and 3rd Order Intermodulation
vs Input Power (Two Input Tones)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–20
POUT
IM3
PLO = –10dBm
fRF1 = 950MHz
fRF2 = 949MHz
TA = 25°C
–15 –10 –5
0
5
IF INPUT POWER (dBm/TONE)
5511 F01b
Figure 1. High Signal Level Upmixer for CATV Downlink Infrastructure.
5511i
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LT5511
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage ....................................................... 5.5V
Enable Voltage ................................ –0.3V to VCC + 0.3V
LO Input Power (Differential) .............................. 10dBm
IF Input Power (Differential) ............................... 10dBm
IF+, IFDC Currents .............................................. 25mA
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10sec)................... 300°C
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UW U
PACKAGE/ORDER I FOR ATIO
LO1
NC 2
GND 3
IF+ 4
IF5
GND 6
VCCBIAS 7
GND 8
TOP VIEW
16 LO+
15 VCCLO
14 GND
13 RF+
12 RF
11 GND
10 EN
9 NC
ORDER PART
NUMBER
LT5511EFE
FE PART MARKING
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 38°C/W
EXPOSED PAD IS GROUND
(MUST BE SOLDERED TO
PRINTED CIRCUIT BOARD)
5511EFE
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC = 5VDC, EN = High, TA = 25°C
IF Input Frequency Range (Note 6)
1 to 300
MHz
LO Input Frequency Range (Note 6)
30 to 2700
MHz
RF Output Frequency Range (Note 6)
10 to 3000
MHz
950MHz Application: (Test Circuit Shown in Figure 2) VCC = 5VDC, EN = High, TA = 25°C, IF Input = 50MHz at –5dBm, LO Input = 1GHz at –10dBm,
RF Output Measured at 950MHz, unless otherwise noted. (Notes 2, 3)
IF Input Return Loss
LO Input Power
With External Matching, ZO = 50
14
–15 to –5
dB
dBm
LO Input Return Loss
RF Output Return Loss
Conversion Gain
With External Matching, ZO = 50
With External Matching, ZO = 50
14 dB
17 dB
0 dB
LO to RF Leakage
–46 dBm
Input 1dB Compression
5.9 dBm
Input 3rd Order Intercept
Two-Tone, –5dBm/Tone, f = 1MHz
17 dBm
Input 2nd Order Intercept
Single-Tone, –5dBm
52 dBm
SSB Noise Figure
15 dB
5511f
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LT5511www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
1.9GHz Application: (Test Circuit Shown in Figure 3) VCC = 5VDC, EN = High, TA = 25°C, IF Input = 50MHz at –5dBm, LO Input = 1.95GHz at –10dBm,
RF Output Measured at 1900MHz, unless otherwise noted. (Notes 3, 4)
IF Input Return Loss
LO Input Power
With External Matching, ZO = 50
14
–15 to –5
dB
dBm
LO Input Return Loss
RF Output Return Loss
Conversion Gain
With External Matching, ZO = 50
With External Matching, ZO = 50
11.5 dB
11.5 dB
–0.7 dB
LO to RF Leakage
–47 dBm
Input 1dB Compression
5.2 dBm
Input 3rd Order Intercept
Two-Tone, –5dBm/Tone, f = 1MHz
15.5 dBm
Input 2nd Order Intercept
Single-Tone, –5dBm
51 dBm
SSB Noise Figure
14 dB
Power Supply Requirements: VCC = 5VDC, EN = High, TA = 25°C, unless otherwise noted.
Supply Voltage
Supply Current
4.0 to 5.25
56 65
VDC
mA
Shutdown Current (Chip Disabled)
EN = Low
1 30
µA
Enable Mode Threshold
Disable Mode Threshold
Turn ON Time (Note 5)
EN = High
EN = Low
3 VDC
0.5 VDC
2 µs
Turn OFF Time (Note 5)
6 µs
Enable Input Current
EN = 5V
1 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 = 950MHz, fLO = 1GHz and fIF = 50MHz (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.
Note 4: External components on the final test circuit are optimized for
operation at fRF = 1900MHz, fLO = 1.95GHz and fIF = 50MHz (Figure 3).
Note 5: Turn On and Turn Off times are based on rise and fall times of RF
output envelope from full power to –40dBm with an IF input power of
–5dBm.
Note 6: Part can be used over a broader range of operating frequencies.
Consult factory for applications assistance.
5511i
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LT5511
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TYPICAL PERFOR A CE CHARACTERISTICS (950MHz Application)
VCC = 5VDC, EN = High , TA = 25°C, IF Input = 50MHz at –5dBm, LO Input = 1GHz at –10dBm, RF Output Measured at 950MHz, unless
otherwise noted. For 2-Tone Measurements: 2nd IF Input = 51MHz at –5dBm. (Test Circuit Shown in Figure 2).
RF Output Power and 3rd Order
Intermodulation vs IF Input Power
(Two Input Tones)
10
TA = 25°C
0
TA = –40°C
–10
TA = 85°C
–20
TA = 25°C
–30
POUT
IM3
–40
–50
TA = –40°C
TA = 85°C
–60
–70
–80
–15
–10 –5
0
IF INPUT POWER (dBm/TONE)
5
5511 G01
Conversion Gain and IIP3
vs LO Power
8
IIP3
TA = 25°C
6
TA = 85°C
4
TA = –40°C
19
17
15
2 GAIN
0
TA = –40°C
TA = 25°C
TA = 85°C
13
11
–2
–20
–15 –10
–5
LO POWER (dBm)
9
0
5511 G04
Conversion Gain and LO to RF
Leakage vs Output Frequency
2
TA = –40°C
0
GAIN
–2
TA = 25°C
TA = 85°C
TA = 85°C
–4 TA = –40°C
–5
–15
– 25
–35
–6
LO LEAKAGE
TA = 25°C
–45
–8
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
–10
300 500 700 900 1100
–55
–65
1300
RF OUTPUT FREQUENCY (MHz)
5511 G07
4
RF Output Power and 2nd Order
Intermodulation vs IF Input Power
(Single Input Tone)
10
0 TA = 25°C
TA = –40°C
–10
–20 POUT
TA = 85°C
–30
–40
–50
–60
IM2
–70
TA = –40°C
TA = 85°C
TA = 25°C
–80
–15
–10 –5
0
IF INPUT POWER (dBm)
5
5511 G02
LO to RF Leakage vs LO Power
–5
–15
–25
–35
–45
–55
–20
TA = 85°C
TA = 25°C
TA = –40°C
–15 –10
–5
LO POWER (dBm)
0
5511 G05
IIP3 and IIP2
vs Output Frequency
60
IIP2
TA = 85°C
50
40 TA = –40°C
TA = 25°C
30
IIP3
20 TA = 85°C
TA = 25°C
10
TA = –40°C
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
0
300 500 700 900 1100
1300
RF OUTPUT FREQUENCY (MHz)
5511 G08
Conversion Gain vs IF Input
Power (Single Input Tone)
5
4
3
2
TA = –40°C
1
0 TA = 25°C
–1 TA = 85°C
–2
–3
–4
–5
–15
–10 –5
0
IF INPUT POWER (dBm)
5
5511 G03
IIP2 vs LO Power
60
TA = –40°C
50
TA = 25°C
40 TA = 85°C
30
20
10
0
–20
–15 –10
–5
LO POWER (dBm)
0
5511 G06
SSB Noise Figure vs
Output Frequency
20
TA = 25°C
18
16
14
12
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
10
300 500 700 900 1100
1300
RF OUTPUT FREQUENCY (MHz)
5511 G09
5511f



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