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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS
SX1701 - Datasheet
Highly linear wideband LNA Multi-channel, single-ended to differential conversion
GENERAL DESCRIPTION
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.
KEY PRODUCT FEATURES
* * * * * * * * * 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 Input impedance 100 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)
APPLICATIONS
* * * * * 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 VDD2 VDD1 GND
SX1701
G3(1:0) OUTP3
Silicon Tuner
TV Tuner
OUTM3 G2(1:0)
RF IN
OUTP2 IN OUTM2 G1(1:0) DEC OUTP1
PIP Tuner
DVR Tuner
OUTM1
G1(1) G1(0)
Gain control
G2(1) G2(0)
G3(1) G3(0)
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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
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
1
SIMPLIFIED BLOCK DIAGRAM
The simplified block diagram of the SX1701 is illustrated below in Figure 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.
OUTM3
OUTP3
G3(1)
16 VDD1 1 SX1701
15
14
G3(0) 13 12 G2(1) 11
VDD2
2
OUTP2
IN
3 17 GND
10
OUTM2
DEC
4
9 6 OUTM1 7 OUTP1 8 G1(1)
G2(0)
5 G1(0)
Figure 1. Simplified block diagram of the SX1701.
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
2
PIN DESCRIPTION
Pin Connections
2.1.1
The pin description of the SX1701 is given in Table 1.
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Name VDD1 VDD2 IN DEC G1(0) OUTM1 OUTP1 G1(1) G2(0) OUTM2 OUTP2 G2(1) G3(0) OUTM3 OUTP3 G3(1) GND Type Input Input Input Input Input Output Output Input Input Output Output Input Input Output Output Input Input Description Supply voltage Supply voltage LNA input Decoupling capacitor Control of the 1st channel Differential output 1st Channel Differential output 1st Channel Control of the 1st channel Control of the 2nd channel Differential output 2nd Channel Differential output 2nd Channel Control of the 2nd channel Control of the 3rd channel Differential output 3rd Channel Differential output 3rd Channel Control of the 3rd channel 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) 00 01 10 11 Description Channel OFF (default value set by pull-down devices) Channel ON, G = 6 dB Channel ON, G = 12 dB 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).
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
3
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 VDDmr Tmr Tjmr Pmr Description Supply voltage Storage temperature Junction Temperature Input level Table 3. Absolute Maximum ratings. Min. -0.5 -55 Max. 5.5 +125 +125 0 Unit V C C dBm
3.2 3.2.1
SPECIFICATIONS Operating Range
Description Supply voltage Temperature Table 4. Operating Range. Min. 4.5 -40 Max. 5.3 +85 Unit V C
Symbol VDDop Trop
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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 RIN ROUT FR G Description Input impedance Output impedance Frequency range Gain S21 Programmable GFLAT NF Gain Flatness Noise figure Rs = 75 , maximum gain Rs = 75 G = 18 dB G = 12 dB G = 6 dB P1dB OIP3 Output P1dB compression point Output 3 order intermodulation (differential)
rd
Condition Single-ended Differential
Min 0.04 50 G = 18 dB G = 12 dB G = 6 dB 3
Typ 75 100 6 12 18 1 7 9 13 13 22 21 19 53 57 130 200 270 15 20 25 30 35 50 20 -
Max 2.5 -
Unit GHz dB dB dB dBm dBm
f1 = 1.0 GHz f2 = 1.1 GHz
G = 18 dB G = 12 dB G = 6 dB @ f1 + f2 @ f2 - f1
OIP2 IDD
Output 2
nd
order intermodulation (differential)
f1 = 1.0 GHz f2 = 1.1 GHz
dBm
Current consumption
1 channel enabled 2 channels enabled 3 channels enabled -20.log(ls11l) -20.log(ls i il) -20.log(ls1 il) -20.log(ls i jl)
mA dB dB
IRL ORL ISOUTIN ISOUTOUT
Input Return loss Output Return loss RF out to RF in Isolation RF out i to RF out j isolation
-
dB dB dB dB kV
ISOUTDWN CMRR VESD
RF in to RF out isolation in shut down mode Common mode rejection at the output ESD robustness on all pins
-20.log(ls i1l) HBM
Table 5. Electrical Specifications.
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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 Z Source = 75 , ZLoad = 100 differential, Frequency range = 40 MHz to 2.5 GHz, C, input matching network according to application schematics of figure 4. Gain
20
Input and Output Return Loss (Gain = 18dB)
0 0
G=18dB
15
-10 -10
G=12dB
Gain (dB) 10
-20 -20
ORL (dB)
G = 6dB
5
-30 -30
IRL (dB)
IRL
ORL
0 0 0.5 1 1.5 2 2.5 Frequency (GHz)
-40 0 0.5 1 1.5 2 2.5 Frequency (GHz)
-40
Noise Figure
14 13 12 11 NF (dB) 10 9 8
Output IP2 & IP3 (Gain = 18dB)
80 40
f2 = f1 + 0.1 GHz
G = 6dB
OIP2 (dBm)
70
30
60
20
G=12dB
G=18dB
7 6 0 0.5 1 1.5 2 2.5 Frequency (GHz)
50
10
OIP2
40 0 0.5 1 f1 (GHz) 1.5 2 2.5 0
Gain Compression
20
Common Mode Rejection
50
G=18dB
40
G=18dB
15
G=12dB
10
CMMR (dB)
Gain (dB)
30
20
G=12dB G=6dB
G=6dB
5
10
0 -15 -10 -5 Input power (dBm) 0 5
0 0 0.5 1 1.5 2 2.5 Frequency (GHz)
Figure 2. Typical Operating Characteristics Curves.
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OIP3 (dBm)
OIP3
SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
Reverse Isolation (G=18dB)
0
Input to Output Isolation in Shut Down Mode
0
-20
Isolation (dB)
-20
S12 (dB)
-40
-40
-60
-60
Shutdown
-80
-80 0 0.5 1 1.5 2 2.5 Frequency (GHz)
0
0.5
1
1.5
2
2.5
Frequency (GHz)
Output to Output Isolation
0
-20 Isolation (dB)
-40
G=18dB G=12dB G=6dB Shutdown
-60
-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.
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
4
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 75 RF INPUT 0.3pF C0G 0603 470pF C0G 0603 3.9nH wirewound 0603 4 DEC 1nF X7R 0603 470pF 17 C0G 0603 3 VDD2 VDD1 GND
SX1701
G3(1:0) OUTP3 15 OUTM3 G2(1:0) OUTP2 14
470pF C0G 0603 100 RF BALANCED OUTPUT 3 470pF C0G 0603 470pF C0G 0603 100 RF BALANCED OUTPUT 2 470pF C0G 0603 470pF C0G 0603 100 RF BALANCED OUTPUT 1 470pF C0G 0603
IN OUTM2 G1(1:0) OUTP1
11 10
7 470pF C0G 0603 OUTM1 6 G1(1) G1(0) 58 6X 3K3 0603 G2(1) G2(0) 9 12 G3(1) G3(0) 13 16
Gain control
Figure 4. Application board schematic.
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
5
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 75 RF INPUT 0.3pF C0G 0603 470pF C0G 0603 3.9nH wirewound 0603 4 DEC 1nF X7R 0603 470pF 17 C0G 0603 3 VDD2 VDD1 GND
SX1701
G3(1:0) OUTP3 15 OUTM3 G2(1:0) OUTP2 14
470pF C0G 0603 100 RF BALANCED OUTPUT 2 470pF C0G 0603 470pF C0G 0603 100 RF BALANCED OUTPUT1 470pF C0G 0603 470pF C0G 0603
IN OUTM2 G1(1:0) OUTP1
11 10
7 470pF C0G 0603 OUTM1 6 470pF C0G 0603 51R0 0603 G1(1) G1(0) 58 6X 3K3 0603 G2(1) G2(0) 9 12 G3(1) G3(0) 13 16
100R 0603
15R0 0603
75 RF LOOPTHROUGH OUTPUT
Gain control
Figure 5. Dual differential outputs with loop-through.
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
6
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
Figure 7. Marking information.
Notes: 1. 1701 = Product code (SX1701) 2. yyww = Datecode (Example 0824) 3. xxxxx = Lot number
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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
8
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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SX1701
ADVANCED COMMUNICATION & SENSING PRODUCTS Datasheet
(c) 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
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