SN761688
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SLES178 – APRIL 2006
FEATURES
•
•
•
•
RF AGC Amplifier, Mixer, and IF Amplifier
Circuits
Low Distortion
5-V Power Supply
16-Pin TSSOP Package
APPLICATION
•
CATV
16-PIN TSSOP
(TOP VIEW)
AGC IN1
AGC IN2
VAGC
GND
LO IN1
LO IN 2
VCC1
VCC2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
MIXOUT1
MIXOUT2
GND
IF IN1
IF IN 2
GND
IFOUT1
IFOUT2
DESCRIPTION
The SN761688 is a monolithic IC designed as an out-of-band tuner for CATV. The circuit consists of an RF AGC
amplifier, mixer, and IF amplifier, and is available in a small-outline package.
FUNCTIONAL BLOCK DIAGRAM
AGC Amplifier
AGC IN1
1
AGC IN2
Mixer
16
MIXOUT1
2
15
MIXOUT2
VAGC
3
14
GND
GND
4
13
IF IN1
LO IN1
5
12
IF IN2
LO IN2
6
11
GND
10
IFOUT 2
9
IFOUT 1
Buffer
VCC 1
7
IF Amplifier
VCC2
8
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
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SLES178 – APRIL 2006
TERMINAL FUNCTIONS
TERMINAL
NAME
AGC IN1
1
AGC IN2
2
VAGC
3
GND
DESCRIPTION
NO.
4, 11, 14
SCHEMATIC
Input of AGC amplifier
Figure 1
Input of gain control voltage
Figure 2
Ground
LO IN1
5
LO IN2
6
Input of local OSC
VCC1
7
5 V power supply; AGC/Mixer/Buffer
VCC2
8
5 V power supply; IF amplifier
IF OUT1
9
Output of IF amplifier
Figure 4
IF OUT2
10
IF IN2
12
Input of IF amplifier
Figure 5
IF IN1
13
MIXOUT2
15
Output of Mixer
Figure 6
MIXOUT1
16
1 k
Figure 3
30 k
1 k
3
1
2
100 k
Figure 1.
3 k
Figure 2.
3 k
5
6
15 Ω
9
10
Figure 3.
1 k
Figure 4.
1 k
12
13
16 Ω
15
16
Figure 5.
2
Figure 6.
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ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (2)
Input voltage
(2)
(1)
VCC1,2 (Pin 7, 8)
–0.4 V to 6.5 V
VIN (Pins 1, 2, 3, 5, 6, 12, 13)
–0.4 V to VCC
TA ≤ 25°C
Continuous total dissipation, PD (3)
775 mW
Maximum junction temperature, TJ
(1)
(2)
(3)
150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Voltage values are with respect to the GND of the circuit.
Derating factor is 6.2 mW/°C for TA ≥ 25°C.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
Supply voltage, VCC
4.5
5
5.5
UNIT
V
Operating free-air temperature, TA
–20
85
°C
DC ELECTRICAL CHARACTERISTICS
VCC = 5 V, TA = 25°C, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
ICC
Supply current
No signal, VAGC = 0 V
67
IIAGC
Input current (VAGC)
VAGC = 3 V
22
VAGCMAX
AGC voltage high at maximum gain
VAGCMIN
AGC voltage low at minimum gain
MAX
UNIT
mA
33
µA
3
VCC
V
0
0.5
V
AC ELECTRICAL CHARACTERISTICS
VCC = 5 V, TA = 25°C, unless otherwise noted
PARAMETER
AGC amplifier and
TEST CONDITIONS
MIN
TYP
MAX
UNIT
mixer (1)
GCMAX
Maximum conversion gain
VAGC = 3 V
27
30
33
dB
GCMIN
Minimum conversion gain
VAGC = 0 V
-21
-18
-15
dB
GCRMIX
Gain control range
VAGC = 0 V to 3 V
VMIXOUT
Mixer output voltage
VAGC = 3 V, Single-ended output
NF
Noise figure (2)
VAGC = 3 V
IM3GMX
Third order intermodulation
distortion
fIN1 = 79.5 MHz, fIN2 = 80.5 MHz,
VOUT = -10 dBm, VAGC = 3 V
OIP3GMX
Output intercept point
48
dB
117
dBµV
10
dB
-60
dBc
fIN1 = 79.5 MHz, fIN2 = 80.5 MHz, VAGC
=3V
20
dBm
IF amplifier (3)
GVIFMAX
Maximum voltage gain
VAGC = 3 V
51
dB
GVIFMIN
Minimum voltage gain
VAGC = 0 V
46
dB
GVRIF
Gain control range
VAGC = 0 V to 3 V
5
dB
IM3IF
Third order intermodulation
distortion
fIN1 = 43.5 MHz, fIN2 = 445 MHz,
VIFOUT = 1 dBm, VAGC = 3 V
-60
dBc
VIFOUT
IF amplifier output voltage
VAGC = 3 V, Single-ended output
122
dBµV
(1)
(2)
(3)
Measurement Circuit 1 except for Noise Figure measurement. AGC IN = 80 MHz/-37 dBm, LO IN = 36 MHz / -20 dBm, IF = 44 MHz,
unless otherwise noted.
Measurement Circuit 2.
Measurement Circuit 3. IF IN = 44 MHz / -50 dBm, unless otherwise noted.
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APPLICATION INFORMATION
MEASUREMENT CIRCUITS
SG
50
50
0.1 F 1
AGC IN1
MIXOUT1 16
0.1 F
0.1 F 2
AGC IN2
MIXOUT2 15
0.1 F
3
VAGC
4
GND
IF IN1 13
0.1 F 5
LO IN1
IF IN2 12
0.1 F 6
LO IN2
GND 11
0.1 F
GND 14
50
50
Spectrum
Analyzer
SG
50
50
7
VCC1
IF OUT2 10
8
VCC2
IF OUT1 9
VCC
0.1 F
VCC
0.1 F
Figure 7. Measurement Circuit 1
NF Meter
Noise Source
0.1 F 1
AGC IN1
MIXOUT1 16
0.1 F
0.1 F 2
AGC IN2
MIXOUT2 15
0.1 F
3
VAGC
4
GND
IF IN1 13
0.1 F 5
LO IN1
IF IN2 12
0.1 F 6
LO IN2
GND 11
0.1 F
GND 14
SG
50
50
7
VCC1
IF OUT2 10
8
VCC2
IF OUT1 9
VCC
0.1 F
VCC
0.1 F
Figure 8. Measurement Circuit 2
4
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50
50
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APPLICATION INFORMATION (continued)
1
AGC IN1
MIXOUT1 16
2
AGC IN2
MIXOUT2 15
3
VAGC
SG
GND 14
50
0.1 F
4
GND
IF IN1 13
5
LO IN1
IF IN2 12
6
LO IN2
GND 11
7
VCC1
IF OUT2 10
8
VCC2
IF OUT1 9
50
0.1 F
Vout = Vmeas + 14 dB
0.1 F
200
VCC
0.1 F
VCC
200
0.1 F
0.1 F
Vmeas
50
50
Spectrum
Analyzer
Figure 9. Measurement Circuit 3
NOTE:
This application information is advisory and a performance check is required at the
actual application circuits.
Texas Instruments assumes no responsibility for the consequences of use of these
application circuits, such as infringement of intellectual property rights or other rights,
including patents, of third parties.
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TYPICAL CHARACTERISTICS
Mixer Conversion Gain
vs
AGC Control Voltage
Mixer Conversion Gain
vs
AGC Control Voltage
40
40
VCC = 5 V
TA = 25C
30
30
20
VCC = 4.5 V
10
Gain [dB]
Gain [dB]
20
TA = −20C
0
VCC = 5 V
−10
10
TA = 25C
0
−10
TA = 85C
VCC = 5.5 V
−20
−20
−30
0.0
0.5
1.0
1.5
2.0
2.5
−30
3.0
0.0
0.5
1.0
AGC control voltage [V]
2.0
Figure 10.
Figure 11.
Mixer Output Level
vs
AGC IN lnput Level
Mixer Output Level
vs
LO IN lnput Level
3.0
VCC = 5 V,
VAGC = 3 V
VCC = 5.5 V
TA = 25C,
VAGC = 3 V
110
110
VCC = 5 V
VCC = 4.5 V
100
90
80
70
60
−80
−70
−60
−50
−40
−30
−20
−10
AGC IN Input Level [dBm]
0
10
20
MIXOUT Output Level [dBuV]
120
TA = −20C
100
90
TA = 25C
80
TA = 85C
70
60
−80
−70
−60
−50
−40
−30
−20
LO IN Input Level [dBm]
Figure 12.
6
2.5
120
130
MIXOUT Output Level [dBuV]
1.5
AGC control voltage [V]
Figure 13.
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−10
0
10
20
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TYPICAL CHARACTERISTICS (continued)
Mixer NF
vs
Gain
Mixer IM3 (VAGC = 3 V)
40
40
VCC = 5 V,
TA = 25C
30
NF [dB]
VCC = 5 V, TA = 25C
20
MIXOUT Output Level [dBm]
35
25
20
15
10
5
43.5 MHz
0
−20
42.5 MHz
−40
−60
−80
AGC IN = 79.5 MHz / 80.5 MHz,
LO IN = 36 MHz
−100
−120
0
10
20
30
40
50
−70
−50
−40
−30
−20
AGC IN Input Level [dBm]
Figure 14.
Figure 15.
Mixer Frequency Response
IF Amp Gain
vs
AGC Control Voltage
−10
0
55
40
VCC = 5 V,
TA = 25C
30
VCC = 5 V
VCC = 4.5 V
VCC = 5 V,
TA = 25C
20
50
VAGC = 3 V
10
VCC = 5.5 V
Gain [dB]
MIXER GAIN [dB]
−60
Gain [dB]
0
−10
45
VAGC = 0 V
−20
−30
40
0
100
200
300
400
500
600
0.0
AGC IN Input Freq [MHz]
0.5
1.0
1.5
2.0
2.5
3.0
AGC control voltage [V]
Figure 16.
Figure 17.
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TYPICAL CHARACTERISTICS (continued)
IF Amp Gain
vs
AGC Control Voltage
IF Amp IM3 (AGC = 3 V)
55
40
TA = −20C
20
IFOUT output level [dBm]
VCC = 5 V
Gain [dB]
50
TA = 25C
TA = 85C
45
VCC = 5 V,
TA = 25C
43.5 MHz
0
42.5 MHz
−20
−40
−60
−80
IF IN = 43.5 MHz / 44.5 MHz
−100
40
0.0
0.5
1.0
1.5
2.0
2.5
−80.0
3.0
−70.0
−60.0
−50.0
AGC control voltage [V]
Figure 18.
Figure 19.
IF Amp NF
vs
Gain
12.0
VCC = 5 V,
TA = 25C
NF [dB]
11.0
10.0
9.0
8.0
40.0
45.0
50.0
55.0
IFAMP Gain [dB]
Figure 20.
8
−40.0
IF IN input level [dBm]
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60.0
−30.0
−20.0
−10.0
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TYPICAL CHARACTERISTICS (continued)
S-PARAMETER
Figure 21. AGC IN
Figure 22. IF IN
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TYPICAL CHARACTERISTICS (continued)
Figure 23. IF OUT
10
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PACKAGE OPTION ADDENDUM
www.ti.com
19-Sep-2011
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
TBD
Lead/
Ball Finish
Call TI
MSL Peak Temp
(3)
Samples
(Requires Login)
SN761688PW
ACTIVE
TSSOP
PW
16
Call TI
SN761688PWR
ACTIVE
TSSOP
PW
16
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN761688PWRG4
ACTIVE
TSSOP
PW
16
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
20-Oct-2010
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
SN761688PWR
Package Package Pins
Type Drawing
TSSOP
PW
16
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
2000
330.0
12.4
Pack Materials-Page 1
6.9
B0
(mm)
K0
(mm)
P1
(mm)
5.6
1.6
8.0
W
Pin1
(mm) Quadrant
12.0
Q1
PACKAGE MATERIALS INFORMATION
www.ti.com
20-Oct-2010
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
SN761688PWR
TSSOP
PW
16
2000
346.0
346.0
29.0
Pack Materials-Page 2
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