SX1701A Datasheet

SX1701A
ADVANCED COMMUNICATION & SENSING PRODUCTS
SX1701A – Datasheet
Highly linear wideband LNA
Single-channel, single-ended to differential conversion
GENERAL DESCRIPTION
KEY PRODUCT FEATURES
The SX1701A 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 with 3 selectable gains.
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APPLICATIONS
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Digital Set Top Boxes (Satellite and Terrestrial)
CATV Distribution Systems
Active Splitter
Data Communications Systems
Active Balun
Single-ended input / Differential outputs
Programmable gain: 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 at maximum gain
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)
ORDERING INFORMATION
Part number
Temperature range
Package
Lead Free
MLPQ-16
Note: This device is WEEE and RoHS compliant.
SX1701AI085TRT
-40 °C to +85 °C
TYPICAL APPLICATION
+ 5.0 V
SX1701A
VDD2
VDD1
GND
G1(1:0)
RF IN
OUTP1
IN
Silicon Tuner
TV
Tuner
OUTM1
DEC
G1(1)
G1(0)
Gain control
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SX1701A
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 with Single-Ended Outputs ....................................................................................10
75 Ω Single-Ended Input to Dual 50 Ω Single-Ended Outputs (Active Splitter) ............................................10
Package Outline Drawing............................................................................................................................11
Marking Information ....................................................................................................................................11
Land Pattern Drawing..................................................................................................................................12
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SX1701A
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1
Datasheet
SIMPLIFIED BLOCK DIAGRAM
The simplified block diagram of the SX1701A is illustrated below in Figure 1.
VDD2
IN
NC
NC
NC
14
13
12
G1(1)
2
11
OUTP1
3
10
OUTM1
9
G1(0)
SX1701A
17
GND
5
6
NC
4
NC
DEC
15
7
8
NC
1
16
NC
VDD1
NC
The amplifier comprises two main stages. The first stage performs the single-ended to differential conversion. The
second stage is implemented with two cascaded stages and performs the gain control.
Figure 1. Simplified block diagram of the SX1701A.
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Datasheet
PIN DESCRIPTION
2.1.1
Pin Connections
The pin description of the SX1701A 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
NC
None
No Connect
6
NC
None
No Connect
7
NC
None
No Connect
8
NC
None
No Connect
9
G1(0)
Input
Gain Control 0
10
OUTM1
Output
Differential output -
11
OUTP1
Output
Differential output +
12
G1(1)
Input
Gain Control 1
13
NC
None
No Connect
14
NC
None
No Connect
15
NC
None
No Connect
16
NC
None
No Connect
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.
G1(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.
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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.
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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)
50
-
-
dB
ISOUTDWN
RF in to RF out isolation in shut down mode
-20.log(ls i1l)
-
50
-
dB
CMRR
Common mode rejection at the output
-
20
-
dB
VESD
ESD robustness on all pins
3
-
-
kV
HBM
Table 5. Electrical Specifications.
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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
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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 SX1701A reference design at
www.semtech.com.
+ 5.0 V
2
1
10nF
X7R
0603
1nF
X7R
0603
470pF 17
C0G
0603
75 Ω RF IN
0.3pF
C0G
0603
3
470pF
C0G
0603
SX1701A
VDD2
3K3
0603
VDD1
G1(1)
GND
OUTP1
IN
OUTM1
DEC
10
G1(0)
9
100 Ω RF BALANCED
OUTPUT
470pF
C0G
0603
Gain control 0
3K3
0603
NC
NC
NC
NC
7
NC
6
NC
5
NC
NC
470pF
C0G
0603
Gain control 1
470pF
C0G
0603
11
3.9nH
wirewound
0603
4
12
8 13 14 15 16
Figure 4. Application board schematic.
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Datasheet
APPLICATION EXAMPLE WITH SINGLE-ENDED OUTPUTS
Although intended for differential output operation, the SX1701A may be used in the single-ended outputs
configuration of Figure 5. Note that some degradation in device performance may be experienced, including a 3 dB
reduction in power gain.
5.1
75 Ω SINGLE-ENDED INPUT TO DUAL 50 Ω SINGLE-ENDED OUTPUTS (ACTIVE SPLITTER)
+ 5.0 V
2
1
10nF
X7R
0603
1nF
X7R
0603
470pF 17
C0G
0603
75 Ω RF IN
0.3pF
C0G
0603
3
470pF
C0G
0603
SX1701A
VDD2
3K3
0603
VDD1
G1(1)
GND
OUTP1
IN
Gain control 1
470pF
C0G
0603
50 Ω RF OUTPUT 1
11
3.9nH
wirewound
0603
OUTM1
4
12
DEC
10
G1(0)
9
50 Ω RF OUTPUT 2
Gain control 0
3K3
0603
NC
NC
NC
NC
7
NC
6
NC
5
NC
NC
470pF
C0G
0603
470pF
C0G
0603
8 13 14 15 16
Figure 5. Active balun application example.
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Datasheet
PACKAGE OUTLINE DRAWING
SX1701A is assembled in a MLPQ-16, 4 mm x 4 mm as shown in Figure 6.
Figure 6. Package outline drawing.
7
MARKING INFORMATION
1701A
yyww
xxxxx
xxxxx
Notes:
1. 1701A = Product code (SX1701A)
2. yyww = Datecode (Example 0824)
3. xxxxx = Lot number
Figure 7. Marking information.
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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.
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SX1701A
ADVANCED COMMUNICATION & SENSING PRODUCTS
Datasheet
© Semtech 2008
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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.
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Contact Information
Semtech Corporation
Advanced Communications and Sensing Products Division
200 Flynn Road, Camarillo, CA 93012
Phone (805) 498-2111 Fax : (805) 498-3804
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