SEMTECH SX1701

SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
SX1701 – Datasheet
Highly linear wideband LNA
Multi-channel, single-ended to differential conversion
GENERAL DESCRIPTION
KEY PRODUCT FEATURES
The SX1701 is an integrated LNA operating over a wide
frequency range from 40 MHz to 2.5 GHz. It is optimized
for high OIP2 and OIP3 with minimum current
consumption. It also performs a single-ended to
differential conversion.
Three independent output channels are available and the
gain of each may be adjusted independently.
•
•
APPLICATIONS
•
•
•
•
•
•
Single-ended input / Triple differential outputs
Independent programmable gain for each channel: 6,
12 and 18 dB
High Linearity: OIP2 of 57 dBm and OIP3 of 22 dBm
Noise Figure of 7 dB
75 Ω Input impedance
100 Ω differential output impedance
Current consumption of 130 mA with one channel
enabled
ESD protection (Normal ESD handling procedures
should be observed)
Very small package: MLPQ-16, 4 mm x 4 mm
(equivalent to QFN-16, 4 mm x 4 mm)
•
•
•
•
•
Digital Set Top Boxes (Satellite and Terrestrial)
CATV Distribution Systems
Active Splitter
Data Communications Systems
Active Balun
•
ORDERING INFORMATION
Part number
Temperature range
Package
Lead Free
MLPQ-16
Note: This device is WEEE and RoHS compliant.
SX1701I085TRT
-40 °C to +85 °C
TYPICAL APPLICATION
+ 5.0 V
SX1701
G3(1:0)
VDD2
OUTP3
VDD1
Silicon Tuner
TV
Tuner
OUTM3
GND
G2(1:0)
RF IN
OUTP2
IN
PIP
Tuner
OUTM2
G1(1:0)
DEC
OUTP1
DVR
Tuner
G3(1)
G3(0)
G2(1)
G2(0)
G1(1)
G1(0)
OUTM1
Gain control
th
V1.11_STD – August 20 , 2008
1/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
Datasheet
TABLE OF CONTENTS
1
2
2.1.1
2.1.2
3
3.1
3.2
3.2.1
3.2.2
3.3
4
5
5.1
6
7
8
Simplified Block Diagram..............................................................................................................................3
Pin Description...............................................................................................................................................4
Pin Connections...............................................................................................................................................4
Gain Control Pins.............................................................................................................................................4
Electrical Characteristics ..............................................................................................................................5
Absolute Maximum Ratings .............................................................................................................................5
Specifications ...................................................................................................................................................5
Operating Range..............................................................................................................................................5
Electrical Specifications ...................................................................................................................................6
Typical Operating Characteristics....................................................................................................................7
Application Information.................................................................................................................................9
Application Example....................................................................................................................................10
Single-Ended Input to Dual Differential Outputs with Loop-through Single-Ended Output ...........................10
Package Outline Drawing............................................................................................................................11
Marking Information ....................................................................................................................................11
Land Pattern Drawing..................................................................................................................................12
V1.11_STD – August 20th, 2008
2/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
1
Datasheet
SIMPLIFIED BLOCK DIAGRAM
The simplified block diagram of the SX1701 is illustrated below in Figure 1.
IN
3
DEC
4
OUTP3
OUTM3
G3(0)
13
SX1701
17
GND
5
6
7
8
G1(1)
2
14
OUTP1
VDD2
15
OUTM1
1
16
G1(0)
VDD1
G3(1)
The amplifier comprises two main stages. The first stage is common to all channels and performs the single-ended
to differential conversion. The second stage, duplicated for all channels, is implemented as two cascaded stages and
performs independently the gain control for each channel.
12
G2(1)
11
OUTP2
10
OUTM2
9
G2(0)
Figure 1. Simplified block diagram of the SX1701.
V1.11_STD – August 20th, 2008
3/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
2
Datasheet
PIN DESCRIPTION
2.1.1
Pin Connections
The pin description of the SX1701 is given in Table 1.
Number
Name
Type
Description
1
VDD1
Input
Supply voltage
2
VDD2
Input
Supply voltage
3
IN
Input
LNA input
4
DEC
Input
Decoupling capacitor
5
G1(0)
Input
Control of the 1st channel
6
OUTM1
Output
Differential output 1st Channel
7
OUTP1
Output
Differential output 1st Channel
8
G1(1)
Input
Control of the 1st channel
9
G2(0)
Input
Control of the 2nd channel
10
OUTM2
Output
Differential output 2nd Channel
11
OUTP2
Output
Differential output 2nd Channel
12
G2(1)
Input
Control of the 2nd channel
13
G3(0)
Input
Control of the 3rd channel
14
OUTM3
Output
Differential output 3rd Channel
15
OUTP3
Output
Differential output 3rd Channel
16
G3(1)
Input
Control of the 3rd channel
17
GND
Input
Ground pad
Table 1. Pin description.
2.1.2
Gain Control Pins
The gain setting for each channel is given in Table 2.
Gi(1:0)
Description
00
Channel OFF (default value set by pull-down devices)
01
Channel ON, G = 6 dB
10
Channel ON, G = 12 dB
11
Channel ON, G = 18 dB
Table 2. Channel gain setting.
Note: For applications that require less than 3 outputs, the unused differential outputs and the corresponding channel
gain setting pins can be left floating. The default channel gain setting is “channel OFF [0:0]” (set by internal pull down
resistors).
V1.11_STD – August 20th, 2008
4/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
3
Datasheet
ELECTRICAL CHARACTERISTICS
3.1 ABSOLUTE MAXIMUM RATINGS
Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum
ratings for extended periods may affect device reliability.
Symbol
Description
Min.
Max.
Unit
VDDmr
Supply voltage
-0.5
5.5
V
Tmr
Storage temperature
-55
+125
°C
Tjmr
Junction Temperature
-
+125
°C
Pmr
Input level
-
0
dBm
Min.
Max.
Unit
Table 3. Absolute Maximum ratings.
3.2
SPECIFICATIONS
3.2.1
Operating Range
Symbol
Description
VDDop
Supply voltage
4.5
5.3
V
Trop
Temperature
-40
+85
°C
Table 4. Operating Range.
V1.11_STD – August 20th, 2008
5/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
Datasheet
3.2.2 Electrical Specifications
The table below gives the electrical specifications of the LNA under the following conditions:
VDD = 5.0 V, Temperature = 25 °C, Input frequency = 1 GHz, Gain = 18 dB, Pin = -20dBm, unless otherwise specified.
Symbol
Description
Condition
Min
Typ
Max
Unit
RIN
Input impedance
Single-ended
-
75
-
Ω
ROUT
Output impedance
Differential
-
100
-
Ω
FR
Frequency range
0.04
-
2.5
GHz
G
Gain
S21
-
6
-
Programmable
-
12
-
-
18
-
GFLAT
Gain Flatness
Rs = 75 Ω, maximum gain
-
±1
-
NF
Noise figure
Rs = 75 Ω
G = 18 dB
-
7
-
G = 12 dB
-
9
-
G = 6 dB
-
13
-
-
13
-
P1dB
OIP3
OIP2
IDD
Output P1dB compression point
rd
Output 3 order intermodulation (differential)
nd
Output 2
order intermodulation (differential)
Current consumption
f1 = 1.0 GHz
G = 18 dB
-
22
-
f2 = 1.1 GHz
G = 12 dB
-
21
-
G = 6 dB
-
19
-
f1 = 1.0 GHz
@ f1 + f2
-
53
-
f2 = 1.1 GHz
@ f2 - f1
-
57
-
1 channel enabled
2 channels enabled
3 channels enabled
-
130
200
270
-
dB
dB
dB
dBm
dBm
dBm
mA
IRL
Input Return loss
-20.log(ls11l)
-
15
dB
ORL
Output Return loss
-20.log(ls i il)
-
20
dB
ISOUTIN
RF out to RF in Isolation
-20.log(ls1 il)
ISOUTOUT
RF out i to RF out j isolation
-20.log(ls i jl)
50
-
-
G = 18 dB
-
25
-
G = 12 dB
-
30
-
G = 6 dB
ISOUTDWN
RF in to RF out isolation in shut down mode
CMRR
Common mode rejection at the output
VESD
ESD robustness on all pins
-20.log(ls i1l)
HBM
dB
dB
-
35
-
-
50
-
dB
-
20
-
dB
3
-
-
kV
Table 5. Electrical Specifications.
V1.11_STD – August 20th, 2008
6/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
Datasheet
3.3
TYPICAL OPERATING CHARACTERISTICS
The curves below give the typical RF performances of the LNA under the following conditions:
VDD = 5.0 V, Temperature = 25 °C, Z Source = 75Ω, ZLoad = 100Ω differential, Frequency range = 40 MHz to 2.5 GHz,
input matching network according to application schematics of figure 4.
Gain
Input and Output Return Loss (Gain = 18dB)
20
0
0
G=18dB
-10
15
-10
10
IRL
-20
-20
ORL (dB)
IRL (dB)
Gain (dB)
G=12dB
G = 6dB
-30
5
-30
ORL
-40
0
0
0.5
1
1.5
2
-40
0
2.5
0.5
1.5
2
2.5
Frequency (GHz)
Frequency (GHz)
Noise Figure
Output IP2 & IP3 (Gain = 18dB)
80
14
40
f2 = f1 + 0.1 GHz
13
70
OIP2 (dBm)
11
10
G=12dB
9
8
30
OIP3
60
20
50
G=18dB
OIP3 (dBm)
G = 6dB
12
NF (dB)
1
10
OIP2
7
6
40
0
0.5
1
1.5
2
2.5
0
0
0.5
1
Frequency (GHz)
1.5
2
2.5
2
2.5
f1 (GHz)
Gain Compression
Common Mode Rejection
50
20
G=18dB
G=18dB
40
15
CMMR (dB)
Gain (dB)
G=12dB
10
30
G=12dB
20
G=6dB
G=6dB
5
10
0
0
-15
-10
-5
0
0
5
0.5
1
1.5
Frequency (GHz)
Input power (dBm)
Figure 2. Typical Operating Characteristics Curves.
th
V1.11_STD – August 20 , 2008
7/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
Reverse Isolation (G=18dB)
Datasheet
Input to Output Isolation in Shut Down Mode
0
0
-20
Isolation (dB)
S12 (dB)
-20
-40
-40
-60
-60
Shutdown
-80
0
-80
0
0.5
1
1.5
2
0.5
1
1.5
2
2.5
Frequency (GHz)
2.5
Frequency (GHz)
Output to Output Isolation
0
Isolation (dB)
-20
-40
G=18dB
G=12dB
-60
G=6dB
Shutdown
-80
0
0.5
1
1.5
2
2.5
Frequency (GHz)
S11 parameter 40MHz to 2.5GHz (Gain = 18dB)
S22 parameter 40MHz to 2.5GHz (Gain = 18dB)
2.5 GHz
2.5 GHz
40 MHz
40 MHz
Figure 3. Typical Operating Characteristics Curves.
th
V1.11_STD – August 20 , 2008
8/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
4
Datasheet
APPLICATION INFORMATION
Figure 4, below, shows the recommended board schematic. Typical component values are shown and are subject to
change depending on the PCB layout and material used. Please refer to the Semtech SX1701 reference design at
www.semtech.com.
+ 5.0 V
2
1
10nF
X7R
0603
1nF
X7R
0603
470pF 17
C0G
0603
75 Ω RF INPUT
0.3pF
C0G
0603
3
470pF
C0G
0603
470pF
C0G
0603
G3(1:0)
SX1701
VDD2
OUTP3
OUTM3
GND
14
G2(1:0)
OUTP2
IN
470pF
C0G
0603
OUTM2
10
G1(1:0)
DEC
100 Ω
RF BALANCED OUTPUT 2
OUTP1
470pF
C0G
0603
9 12
G3(1)
G3(0)
G2(1)
G2(0)
G1(1)
G1(0)
5 8
OUTM1
6
470pF
C0G
0603
100 Ω
RF BALANCED OUTPUT 1
7
470pF
C0G
0603
470pF
C0G
0603
11
3.9nH
wirewound
0603
4
100 Ω
RF BALANCED OUTPUT 3
15
VDD1
470pF
C0G
0603
13 16
6X
3K3
0603
Gain control
Figure 4. Application board schematic.
V1.11_STD – August 20th, 2008
9/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
5
Datasheet
APPLICATION EXAMPLE
Although intended for differential output operation, the SX1701 may be used for the single-ended output configuration
as shown in Figure 5. Note that some degradation in device performance may be experienced, including a 6 dB
reduction in gain.
5.1
SINGLE-ENDED INPUT TO DUAL DIFFERENTIAL OUTPUTS WITH LOOP-THROUGH SINGLE-ENDED
OUTPUT
+ 5.0 V
2
1
10nF
X7R
0603
1nF
X7R
0603
470pF 17
C0G
0603
75 Ω RF INPUT
0.3pF
C0G
0603
3
VDD2
OUTP3
OUTM3
GND
14
G2(1:0)
OUTP2
IN
470pF
C0G
0603
470pF
C0G
0603
100 Ω
RF BALANCED OUTPUT1
11
OUTM2
10
G1(1:0)
4
100 Ω
RF BALANCED OUTPUT 2
15
VDD1
3.9nH
wirewound
0603
470pF
C0G
0603
470pF
C0G
0603
G3(1:0)
SX1701
DEC
OUTP1
470pF
C0G
0603
470pF
C0G
0603
7
9 12
G3(1)
G3(0)
5 8
G2(1)
G2(0)
75 Ω RF LOOPTHROUGH OUTPUT
G1(1)
G1(0)
470pF
C0G
0603
OUTM1
6
13 16
470pF
C0G
0603
100R
0603
15R0
0603
51R0
0603
6X
3K3
0603
Gain control
Figure 5. Dual differential outputs with loop-through.
V1.11_STD – August 20th, 2008
10/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
6
Datasheet
PACKAGE OUTLINE DRAWING
SX1701 is assembled in a MLPQ-16, 4 mm x 4 mm as shown in Figure 6.
Figure 6. Package outline drawing.
7
MARKING INFORMATION
1701
yyww
xxxxx
xxxxx
Notes:
1. 1701 = Product code (SX1701)
2. yyww = Datecode (Example 0824)
3. xxxxx = Lot number
Figure 7. Marking information.
V1.11_STD – August 20th, 2008
11/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
8
Datasheet
LAND PATTERN DRAWING
The land pattern of MLPQ-16 package, 4 mm x 4 mm is shown in Figure 8.
Figure 8. Land pattern drawing.
V1.11_STD – August 20th, 2008
12/13
www.semtech.com
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
Datasheet
© Semtech 2008
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The
information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable
and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech
assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect
improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure
to parameters beyond the specified maximum ratings or operation outside the specified range.
SEMTECH PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE
IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF
SEMTECH PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE
CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the
customer shall indemnify and hold Semtech and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs damages and attorney fees which could arise.
Contact Information
Semtech Corporation
Advanced Communications and Sensing Products Division
200 Flynn Road, Camarillo, CA 93012
Phone (805) 498-2111 Fax : (805) 498-3804
V1.11_STD – August 20th, 2008
13/13
www.semtech.com