LT5511
High Signal Level
Upconverting Mixer
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Wide RF Output Frequency Range to 3000MHz
Broadband RF and IF Operation
+17dBm Typical Input IP3 (at 950MHz)
+6dBm IF Input for 1dB RF Output Compression
Integrated LO Buffer: –10dBm Drive Level
Single-Ended or Differential LO Input
Double-Balanced Mixer
Enable Function
Single 4.0V – 5.25V Supply Voltage Range
16-Pin TSSOP Exposed Pad Package
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.
APPLICATIO S
s
s
s
CATV Downlink Infrastructure
Wireless Infrastructure
High Linearity Mixer Applications
TYPICAL APPLICATIO
ENABLE
LT5511
EN
V
CC
5V
V
CC
BIAS
VCCLO
950MHz
TO
DOWNMIXER
P
OUT
, IM3 (dBm/TONE)
BIAS
44MHz
MOD
IF
+
IF
–
RF
+
RF
–
GND
LO
+
LO INPUT
994MHz
–10dBm
LO
–
5511 F01a
Figure 1. High Signal Level Upmixer for CATV Downlink Infrastructure.
5511i
U
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
P
LO
= –10dBm
f
RF1
= 950MHz
f
RF2
= 949MHz
T
A
= 25°C
–15
–5
0
–10
IF INPUT POWER (dBm/TONE)
5
5511 F01b
U
U
P
OUT
IM3
1
LT5511
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
LO
–
NC
GND
IF
+
IF
–
GND
V
CC
BIAS
GND
1
2
3
4
5
6
7
8
16 LO
+
Supply Voltage ....................................................... 5.5V
Enable Voltage ................................ –0.3V to V
CC
+ 0.3V
LO Input Power (Differential) .............................. 10dBm
IF Input Power (Differential) ............................... 10dBm
IF
+
, IF
–
DC Currents .............................................. 25mA
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10sec)................... 300°C
ORDER PART
NUMBER
LT5511EFE
15 V
CC
LO
14 GND
13 RF
+
12 RF
–
11 GND
10 EN
9
NC
FE PART MARKING
5511EFE
FE PACKAGE
16-LEAD PLASTIC TSSOP
T
JMAX
= 150°C,
θ
JA
= 38°C/W
EXPOSED PAD IS GROUND
(MUST BE SOLDERED TO
PRINTED CIRCUIT BOARD)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
V
CC
= 5V
DC
, EN = High, T
A
= 25°C
IF Input Frequency Range (Note 6)
LO Input Frequency Range (Note 6)
RF Output Frequency Range (Note 6)
1 to 300
30 to 2700
10 to 3000
MHz
MHz
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
950MHz Application: (Test Circuit Shown in Figure 2) V
CC
= 5V
DC
, EN = High, T
A
= 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
LO Input Return Loss
RF Output Return Loss
Conversion Gain
LO to RF Leakage
Input 1dB Compression
Input 3rd Order Intercept
Input 2nd Order Intercept
SSB Noise Figure
Two-Tone, –5dBm/Tone,
∆f
= 1MHz
Single-Tone, –5dBm
With External Matching, Z
O
= 50Ω
With External Matching, Z
O
= 50Ω
With External Matching, Z
O
= 50Ω
14
–15 to –5
14
17
0
–46
5.9
17
52
15
dB
dBm
dB
dB
dB
dBm
dBm
dBm
dBm
dB
2
U
5511f
W
U
U
W W
W
LT5511
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
1.9GHz Application: (Test Circuit Shown in Figure 3) V
CC
= 5V
DC
, EN = High, T
A
= 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
LO Input Return Loss
RF Output Return Loss
Conversion Gain
LO to RF Leakage
Input 1dB Compression
Input 3rd Order Intercept
Input 2nd Order Intercept
SSB Noise Figure
Power Supply Requirements: V
CC
= 5V
DC
, EN = High, T
A
= 25°C, unless otherwise noted.
Supply Voltage
Supply Current
Shutdown Current (Chip Disabled)
Enable Mode Threshold
Disable Mode Threshold
Turn ON Time (Note 5)
Turn OFF Time (Note 5)
Enable Input Current
EN = 5V
EN = Low
EN = High
EN = Low
2
6
1
3
0.5
4.0 to 5.25
56
1
65
30
V
DC
mA
µA
V
DC
V
DC
µs
µs
µA
Two-Tone, –5dBm/Tone,
∆f
= 1MHz
Single-Tone, –5dBm
With External Matching, Z
O
= 50Ω
With External Matching, Z
O
= 50Ω
With External Matching, Z
O
= 50Ω
14
–15 to –5
11.5
11.5
–0.7
–47
5.2
15.5
51
14
dB
dBm
dB
dB
dB
dBm
dBm
dBm
dBm
dB
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 f
RF
= 950MHz, f
LO
= 1GHz and f
IF
= 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 f
RF
= 1900MHz, f
LO
= 1.95GHz and f
IF
= 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
3
LT5511
(950MHz Application)
V
CC
= 5V
DC
, EN = High , T
A
= 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
0
–10
P
OUT
, IM3 (dBm/TONE)
–20
–30
–40
–50
–60
–70
–80
–15
–10
0
–5
IF INPUT POWER (dBm/TONE)
5511 G01
TYPICAL PERFOR A CE CHARACTERISTICS
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
IM3
T
A
= 25°C
P
OUT
, IM2 (dBm)
–30
–40
–50
–60
–70
IM2
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
GAIN (dB)
T
A
= –40°C
T
A
= 85°C
Conversion Gain and IIP3
vs LO Power
8
IIP3
T
A
= 25°C
T
A
= 85°C
GAIN (dB)
T
A
= –40°C
IIP3 (dBm)
LO TO RF LEAKAGE (dBm)
6
IIP2 (dBm)
4
2
GAIN
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
11
0
–2
–20
–15
–10
LO POWER (dBm)
–5
Conversion Gain and LO to RF
Leakage vs Output Frequency
2
0
GAIN
–2
T
A
= 25°C
T
A
= 85°C
–4
–6
LO LEAKAGE
–8
–10
300
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
500
700
900
1100
RF OUTPUT FREQUENCY (MHz)
T
A
= 25°C
–55
–65
1300
5511 G07
T
A
= –40°C
IIP3, IIP2 (dBm)
T
A
= 85°C
T
A
= –40°C
–25
–35
–45
40
30
20
10
GAIN (dB)
T
A
= 25°C
IIP3
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
NOISE FIGURE (dB)
4
U W
P
OUT
5
9
0
5511 G04
RF Output Power and 2nd Order
Intermodulation vs IF Input Power
(Single Input Tone)
10
0
–10
–20
P
OUT
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
Conversion Gain vs IF Input
Power (Single Input Tone)
5
4
3
2
1
0
–1
–2
–3
–4
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
–80
–15
–10
0
–5
IF INPUT POWER (dBm)
5511 G02
5
–5
–15
–10
0
–5
IF INPUT POWER (dBm)
5
5511 G03
LO to RF Leakage vs LO Power
19
IIP2 vs LO Power
60
T
A
= –40°C
50
T
A
= 25°C
40
T
A
= 85°C
–5
17
–15
15
–25
30
20
13
–35
T
A
= 85°C
–45
T
A
= 25°C
–55
–20
–15
–10
LO POWER (dBm)
5511 G05
T
A
= –40°C
10
0
–20
–5
0
–15
–10
–5
LO POWER (dBm)
0
5511 G06
–5
–15
60
50
IIP3 and IIP2
vs Output Frequency
IIP2
T
A
= 85°C
18
T
A
= –40°C
20
SSB Noise Figure vs
Output Frequency
T
A
= 25°C
LO TO RF LEAKAGE (dBm)
16
14
12
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
500
700
900
1100
RF OUTPUT FREQUENCY (MHz)
1300
5511 G09
0
300
IF = 50MHz, LO SWEPT FROM
400MHz TO 1300MHz AT –10dBm
500
700
900
1100
RF OUTPUT FREQUENCY (MHz)
1300
5511 G08
10
300
5511f
LT5511
(950MHz Application)
V
CC
= 5V
DC
, EN = High , T
A
= 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).
LO and RF Port Return Loss
vs Frequency
0
6
TYPICAL PERFOR A CE CHARACTERISTICS
Conversion Gain
vs Supply Voltage
–10
RETURN LOSS (dB)
RF PORT
IIP3 (dBm)
GAIN (dB)
2
25
–20
LO PORT
–30
–40
–50
300
500
900
700
1100
FREQUENCY(MHz)
(1.9GHz Application)
V
CC
= 5V
DC
, EN = High , T
A
= 25°C, IF Input = 50MHz at –5dBm, LO Input = 1.95GHz at –10dBm, RF Output Measured at 1900MHz,
unless otherwise noted. For 2-Tone Measurements: 2nd IF Input = 51MHz at –5dBm. (Test Circuit Shown in Figure 3).
RF Output Power and 3rd Order
Intermodulation vs IF Input
Power (Two Input Tones)
10
0
–10
P
OUT
, IM3 (dBm/TONE)
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
P
OUT
, IM2 (dBm)
–20
–30
–40
–50
–60
–70
–80
–15
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
–30
–40
–50
–60
–70
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
–10
0
–5
IF INPUT POWER (dBm)
5511 G14
GAIN (dB)
–10
0
–5
IF INPUT POWER (dBm/TONE)
5511 G13
U W
5511 G10
IIP3 and IIP2
vs Supply Voltage
35
IIP2
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
50
60
4
30
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
40
IIP2 (dBm)
0
20
IIP3
15
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
30
–2
20
1300
–4
4.0
4.2
4.4 4.6 4.8 5.0 5.2
SUPPLY VOLTAGE (V)
5.4 5.6
5511 G11
10
4.0
4.2
4.4 4.6 4.8 5.0 5.2
SUPPLY VOLTAGE (V)
10
5.4 5.6
5511 G12
RF Output Power and 2nd Order
Intermodulation vs IF Input Power
(Single Input Tone)
10
0
–10
–20
T
A
= 25°C
T
A
= –40°C
P
OUT
5
4
3
Conversion Gain vs IF Input
Power (Single Input Tone)
P
OUT
IM3
T
A
= 85°C
2
1
0
–1
–2
–3
–4
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
IM2
5
–80
–15
5
–5
–15
–10
0
–5
IF INPUT POWER (dBm)
5
5511 G15
5511i
5
嵌入式系统
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