SN761643DGKR [TI]
暂无描述;
| 型号： | SN761643DGKR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 暂无描述 放大器 |
| 文件： | 总10页 (文件大小：842K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN761643
www.ti.com ..................................................................................................................................................................................................... SLES246–APRIL 2009
AGC AMPLIFIER
1
FEATURES
DGK PACKAGE
(TOP VIEW)
•
Low-Distortion Automatic Gain Control (AGC)
Amplifier
•
•
•
5-V Power Supply
V
1
2
3
4
8
7
6
5
GND1
OUT1
OUT2
GND2
CC
8-Pin Mini Small-Outline Package (MSOP)
Wide Gain Control Range
IN1
IN2
APPLICATIONS
•
•
•
Digital TVs
Digital CATVs
Digital Set-Top Boxes (STBs)
AGC Control
AGC
DESCRIPTION
The SN761643 is an automatic gain control (AGC) amplifier for the TV tuner system of a digital TV, CATV, or
STB. The circuit consists of three stages of controlled-gain amplification, followed by a fixed-gain output
amplifier.
The device is packaged in an 8-pin MSOP suitable for surface mounting.
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.
1
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.
Copyright © 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
SN761643
SLES246–APRIL 2009 ..................................................................................................................................................................................................... www.ti.com
TERMINAL FUNCTIONS
TERMINAL
I/O
EQUIVALENT CIRCUIT
DESCRIPTION
NAME
NO.
60
Ω
4
AGC
4
I
Gain control voltage input
100 kΩ
GND1
GND2
8
5
Power amplifier ground
Pre-amplifier ground
–
V
bias
1 kΩ
1 kΩ
2
3
IN1
IN2
2
3
I
AGC amplifier input
OUT1
OUT2
7
6
O
AGC amplifier output
15 Ω
6
7
VCC
1
–
5-V power supply
Correct Use
(See Note A)
Power Amplifier
Pre-amplifier
OUT1
OUT2
IN1
IN2
GND2
GND1
(See Note B)
A. Be careful to keep enough isolation between input and output line.
B. Form a ground pattern as widely as possible. GND1 and GND2 should not have common impedance.
2
Submit Documentation Feedback
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): SN761643
SN761643
www.ti.com ..................................................................................................................................................................................................... SLES246–APRIL 2009
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
MIN
–0.4
–0.4
MAX
6.5
UNIT
V
VCC Supply voltage range(2)
VCC (pin 1)
AGC (pin 4)
VI
Input voltage range(2)
VCC
477
150
V
PD
TJC
Continuous total dissipation(3)
mW
°C
Maximum junction temperature
(1) 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.
(2) Voltage values are with respect to the GND of the circuit.
(3) At TA ≤ 25°C. For TA > 25°C, the derating factor is 3.82 mW/°C.
RECOMMENDED OPERATING CONDITIONS
MIN NOM MAX UNIT
VCC
Supply voltage
4.5
5
5.5
85
V
TOPE
Operating free-air temperature
–20
°C
DC ELECTRICAL CHARACTERISTICS
VCC = 5 V, TA = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
ICC
Supply current
VAGC = 3 V
28
mA
IIAGC
Input current (AGC)
VAGC = 3 V
30
60
VCC
0.2
µA
V
VAGCMAX AGC maximum gain control voltage
VAGCMIN AGC minimum gain control voltage
Maximum gain
Minimum gain
3
0
V
AC ELECTRICAL CHARACTERISTICS
VCC = 5 V, TA = 25°C, parameters measured in test circuit (unless otherwise noted)
PARAMETER
Maximum gain 1
TEST CONDITIONS
MIN TYP
MAX UNIT
VAGC = 3 V, fIN = 44 MHz, VIN = –60 dBm,
differential out, see Figure 10
GMAX1
GMIN1
GMAX2
GMIN2
57
–7
51
61
–4
55
65
–1
59
–7
dB
dB
dB
dB
VAGC = 0 V, fIN = 44 MHz, VIN = –60 dBm,
differential out, see Figure 10
Minimum gain 1
Maximum gain 2
Minimum gain 2
VAGC = 3 V, fIN = 44 MHz, VIN = –60 dBm, see
Figure 1 and Figure 11
VAGC = 0 V, fIN = 44 MHz, VIN = –60 dBm, see
Figure 1 and Figure 11
–13 –10
GCR
VOUT
NF
Gain control range
Output voltage
Noise figure
VAGC = 0 V to 3 V
65
2.1
11
dB
Vp-p
dB
Single-ended output, see Figure 3
Maximum gain, see Figure 2
fIN1 = 43.5 MHz, fIN2 = 44.5 MHz, Maximum gain,
VOUT = –2 dBm/tone, 1Vp-p
IM3
Third-order intermodulation distortion
–50
dBc
See Figure 5 and Figure 12
IIP3
rIN
Input intercept point
Minimum gain
11
1
dBm
kΩ
Ω
Input resistance (IN1, IN2)
Output resistance (OUT1, OUT2)
rOUT
25
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Link(s): SN761643
SN761643
SLES246–APRIL 2009 ..................................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS
35
30
25
20
15
10
5
60
50
40
30
20
10
V
V
V
= 4.5 V
= 5 V
CC
CC
CC
0
= 5.5 V
–10
–20
10
15 20 25 30 35 40 45 50 55 60
Gain (dB)
0.0
0.5
1.0
1.5
AGC (V)
2.0
2.5
3.0
Figure 1. Gain vs AGC (TA = 25°C)
Figure 2. Noise Figure vs Gain (VCC = 5 V, TA = 25°C)
30
60
50
40
30
20
10
0
20
10
0
–10
–20
–30
–40
–50
–60
–70
–80
Maximum gain
Minimum gain
–70 –60 –50 –40 –30 –20 –10
Input Level (dBm)
0
10
10
100
Frequency (MHz)
Figure 3. Output Level vs Input Level (TA = 25°C)
Figure 4. Gain vs Frequency (Gain = Max, TA = 25°C)
10
0
0
–10
–20
–10
–20
–30
–40
–50
–60
–70
–80
–30
–40
42.5 MHz
43.5 MHz
–50
–60
–70
–80
42.5 MHz
43.5 MHz
–90
–100
–110
–120
–35
0
–30 –25 –20 –15 –10 –5
(dBm)
0
5
10 15
10
20
Gain (dB)
Figure 5. IM3 vs Gain (VCC = 5 V, TA = 25°C)
30
40
50
60
V
IN
Figure 6. IM3 (Gain = Min, VCC = 5 V, TA = 25°C)
4
Submit Documentation Feedback
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): SN761643
SN761643
www.ti.com ..................................................................................................................................................................................................... SLES246–APRIL 2009
TYPICAL CHARACTERISTICS (continued)
20
10
0
–10
–20
–30
–40
–50
–60
42.5 MHz
43.5 MHz
–70
–80
–90
–100
–80
–75 –70 –65 –60 –55 –50 –45 –40 –35 –30
(dBm)
V
IN
Figure 7. IM3 (Gain = Max, VCC = 5 V, TA = 25°C)
S-Parameter
20 MHz
70 MHz
20 MHz
70 MHz
Figure 8. IN1
Figure 9. OUT1
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
5
Product Folder Link(s): SN761643
SN761643
SLES246–APRIL 2009 ..................................................................................................................................................................................................... www.ti.com
APPLICATION INFORMATION
Test Circuits
This application information is advisory, and a performance check is required for actual application circuits.
V
G = 20log(V
v
/V )
OUTdiff IN
CC
47 mF
= 20log(V
/V ) + 6 + 14
OUT IN
0.1 mF
1
V
GND1
OUT1
OUT2
GND2
8
7
6
5
CC
Spectrum
Analyzer
SG
m
0.1
F
50 Ω
200 Ω
0.1 mF
0.1 mF
2
IN1
0.1 mF
V
OUTdiff
V
50 W
V
3
4
IN2
IN
50 Ω
OUT
AGC
250 W
0.1 mF
Figure 10. Measurement Circuit for Gain and Output Voltage 1
V
CC
G = 20log(V
/V ) + 14
OUT IN
47 mF
v
0.1 mF
1
V
GND1
OUT1
OUT2
GND2
8
7
6
5
CC
Spectrum
Analyzer
SG
m
0.1
F
50 Ω
200 Ω
0.1 mF
0.1 mF
2
IN1
0.1 mF
50 Ω
V
3
4
IN2
IN
50 Ω
V
OUT
AGC
250 W
0.1 mF
Figure 11. Measurement Circuit for Gain and Output Voltage 2
SG1
V
50 Ω
CC
47 mF
0.1 mF
1
V
GND1
OUT1
OUT2
GND2
8
7
6
5
CC
Spectrum
Analyzer
m
0.1
F
200 Ω
0.1 mF
0.1 mF
+
2
IN1
0.1 mF
50 Ω
SG2
3
4
IN2
50 Ω
50 Ω
AGC
250Ω
0.1 mF
Figure 12. Measurement Circuit for IM3 and IIP3
6
Submit Documentation Feedback
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): SN761643
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Aug-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
SN761643DGKR
VSSOP
DGK
8
2500
330.0
12.4
5.3
3.4
1.4
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Aug-2012
*All dimensions are nominal
Device
Package Type Package Drawing Pins
VSSOP DGK
SPQ
Length (mm) Width (mm) Height (mm)
367.0 367.0 35.0
SN761643DGKR
8
2500
Pack Materials-Page 2
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All
semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time
of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components which meet ISO/TS16949 requirements, mainly for automotive use. Components which
have not been so designated are neither designed nor intended for automotive use; and TI will not be responsible for any failure of such
components to meet such requirements.
Products
Audio
Applications
www.ti.com/audio
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
Automotive and Transportation www.ti.com/automotive
Communications and Telecom www.ti.com/communications
Amplifiers
Data Converters
DLP® Products
DSP
Computers and Peripherals
Consumer Electronics
Energy and Lighting
Industrial
www.ti.com/computers
www.ti.com/consumer-apps
www.ti.com/energy
dsp.ti.com
Clocks and Timers
Interface
www.ti.com/clocks
interface.ti.com
logic.ti.com
www.ti.com/industrial
www.ti.com/medical
www.ti.com/security
Medical
Logic
Security
Power Mgmt
Microcontrollers
RFID
power.ti.com
Space, Avionics and Defense www.ti.com/space-avionics-defense
microcontroller.ti.com
www.ti-rfid.com
Video and Imaging
www.ti.com/video
OMAP Mobile Processors www.ti.com/omap
Wireless Connectivity www.ti.com/wirelessconnectivity
TI E2E Community
e2e.ti.com
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2012, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明