INA137_07 [BB]
AUDIO DIFFERENTIAL LINE RECEIVERS 【6dB (G= 1/2 or 2); 音频差动线路接收【 6分贝（G = 1或2 ）
| 型号： | INA137_07 |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | AUDIO DIFFERENTIAL LINE RECEIVERS 【6dB (G= 1/2 or 2) |
| 文件： | 总12页 (文件大小：255K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
INA137
INA137
INA2137
INA137
INA2137
INA2137
AUDIO DIFFERENTIAL LINE RECEIVERS
±6dB (G = 1/2 or 2)
FEATURES
APPLICATIONS
● SINGLE AND DUAL VERSIONS
● LOW DISTORTION: 0.0005% at f = 1kHz
● HIGH SLEW RATE: 14V/µs
● AUDIO DIFFERENTIAL LINE RECEIVER
● G = 1/2 OR G = 2 AMPLIFIER
● INSTRUMENTATION BUILDING BLOCK
● CURRENT SHUNT MONITOR
● FAST SETTLING TIME: 3µs to 0.01%
● WIDE SUPPLY RANGE: ±4V to ±18V
● LOW QUIESCENT CURRENT: 2.9mA max
● HIGH CMRR: 90dB
● VOLTAGE-CONTROLLED CURRENT
SOURCE
● GROUND LOOP ELIMINATOR
V+
● FIXED GAIN = ±6dB
7
● PACKAGES—SINGLE: 8-PIN DIP, SO-8
DUAL: 14-PIN DIP, SO-14
12kΩ
6kΩ
2
5
6
1
–In
Sense
Output
DESCRIPTION
The INA137 and INA2137 are differential line receivers
consisting of high performance op amps with on-chip
precision resistors. They are fully specified for high
performance audio applications and have excellent ac
specifications, including low distortion (0.0005% at
1kHz) and high slew rate (14V/µs), assuring good
dynamic response. In addition, wide output voltage
swing and high output drive capability allow use in a
wide variety of demanding applications. The dual ver-
sion features completely independent circuitry for low-
est crosstalk and freedom from interaction, even when
overdriven or overloaded.
12kΩ
6kΩ
3
+In
Ref
INA137
V+
11
4
V–
12kΩ
6kΩ
2
12
13
–In A
Sense A
Out A
A
The INA137 and INA2137 on-chip resistors are laser
trimmed for accurate gain and optimum
common-mode rejection. Furthermore, excellent TCR
tracking of the resistors maintains gain accuracy and
common-mode rejection over temperature. Operation
is guaranteed from ±4V to ±18V (8V to 36V total
supply).
12kΩ
12kΩ
6kΩ
6kΩ
3
6
14
10
+In A
–In B
Ref A
Sense B
9
8
Out B
Ref B
B
The INA137 is available in 8-pin DIP and SO-8
surface-mount packages. The INA2137 comes in
14-pin DIP and SO-14 surface-mount packages. Both
are specified for operation over the extended industrial
temperature range, –40°C to +85°C.
12kΩ
6kΩ
5
+In B
INA2137
4
V–
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
• Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/
•
•
Cable: BBRCORP
•
Telex: 066-6491
•
FAX: (520) 889-1510
•
Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-1391B
Printed in U.S.A. July, 1997
SBOS072
SPECIFICATIONS: VS = ±18V
At TA = +25°C, VS = ±18V, RL = 2kΩ, G = 1/2, and Ref Pin connected to Ground, unless otherwise noted.
INA137PA, UA
INA2137PA, UA
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
AUDIO PERFORMANCE
Total Harmonic Distortion + Noise, f = 1kHz
Noise Floor, RTO(1)
VIN = 10Vrms
20kHz BW
THD+N < 1%
0.0005
–106
+23
%
dBu
dBu
Headroom, RTO(1)
FREQUENCY RESPONSE
Small-Signal Bandwidth
Slew Rate
Settling Time: 0.1%
0.01%
4.0
14
2
3
3
MHz
V/µs
µs
µs
µs
10V Step, CL = 100pF
10V Step, CL = 100pF
50% Overdrive
Overload Recovery Time
Channel Separation (dual), f = 1kHz
123
dB
OUTPUT NOISE VOLTAGE(2)
f = 20Hz to 20kHz
f = 1kHz
3.5
26
µVrms
nV/√HZ
OFFSET VOLTAGE(3)
Input Offset Voltage
vs Temperature
RTO
VCM = 0V
Specified Temperature Range
VS = ±4V to ±18V
±100
±2
±5
±1000
±60
µV
µV/°C
µV/V
vs Power Supply
INPUT
Common-Mode Voltage Range: Positive
Negative
VO = 0V
VO = 0V
3(V+)–7.5
3(V–)+7.5
3(V+)–6
3(V–)+3
V
V
Differential Voltage Range
Common-Mode Rejection
Impedance(4)
See Typical Curve
90
VCM = ±46.5V, RS = 0Ω
74
dB
Differential
Common-Mode
24
18
kΩ
kΩ
GAIN
Initial
Error
vs Temperature
Nonlinearity
0.5
±0.01
±1
V/V
%
ppm/°C
%
VO = –10V to 10V
VO = –10V to 10V
±0.1
±10
0.0001
OUTPUT
Voltage Output, Positive
Negative
Current Limit, Continuous to Common
Capacitive Load (Stable Operation)
(V+)–2
(V–)+2
(V+)–1.8
(V–)+1.6
±60
V
V
mA
pF
500
POWER SUPPLY
Rated Voltage
Voltage Range
±18
V
V
±4
±18
Quiescent Current (per Amplifier)
IO = 0
±2.4
±2.9
mA
TEMPERATURE RANGE
Specification Range
Operation Range
–40
–55
–55
85
125
125
°C
°C
°C
Storage Range
Thermal Resistance, θJA
8-Pin DIP
SO-8 Surface-Mount
14-Pin DIP
100
150
80
°C/W
°C/W
°C/W
°C/W
SO-14 Surface-Mount
100
RTO = Referred to Output.
NOTES: (1) dBu
= 20log (Vrms/0.7746). (2) Includes effects of amplifier’s input current noise and thermal noise contribution of resistor network.
(3) Includes effects of amplifier’s input bias and offset currents. (4) Internal resistors are ratio matched but have ±25% absolute value.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
2
INA137, INA2137
PIN CONFIGURATIONS
Top View
8-Pin DIP/SO-8
Top View
14-Pin DIP/SO-14
1
1
2
3
4
5
6
7
14
13
12
11
10
9
NC
NC
Ref A
Out A
Sense A
V+
Ref
8
7
6
5
2
V+
–In
–In A
+In A
V–
A
3
Output
Sense
+In
4
V–
+In B
–In B
NC
Sense B
Out B
Ref B
B
NC = No Connection
ABSOLUTE MAXIMUM RATINGS(1)
8
Supply Voltage, V+ to V– .................................................................... 40V
Input Voltage Range .......................................................................... ±80V
Output Short-Circuit (to ground)(2) ............................................................ Continuous
Operating Temperature ................................................. –55°C to +125°C
Storage Temperature..................................................... –55°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NC = No Connection
NOTE: (1) Stresses above these ratings may cause permanent damage.
(2) One channel per package.
ELECTROSTATIC
DISCHARGE SENSITIVITY
PACKAGE/ORDERING INFORMATION
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate precautions. Failure to observe proper handling and
installation procedures can cause damage.
PACKAGE
DRAWING
NUMBER(1)
SPECIFICATION
TEMPERATURE
RANGE
PRODUCT
PACKAGE
Single
INA137PA
INA137UA
8-Pin DIP
SO-8 Surface-Mount
006
182
–40°C to +85°C
–40°C to +85°C
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.
Dual
INA2137PA
INA2137UA
14-Pin DIP
SO-14 Surface-Mount
010
235
–40°C to +85°C
–40°C to +85°C
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
®
3
INA137, INA2137
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±18V, and G = 1/2, unless otherwise noted.
TOTAL HARMONIC DISTORTION+NOISE
vs FREQUENCY
0.1
DIM INTERMODULATION DISTORTION
vs OUTPUT AMPLITUDE
5
1
BW = 100kHz
VO = 5Vrms
RTO
0.010
0.1
RL = 2kΩ, 600Ω
RL = 100kΩ
RL = 2kΩ
0.001
0.010
0.001
RL = 600Ω
0.0001
20
100
1k
10k 20k
–10
–5
0
5
10
15
20
25
Frequency (Hz)
Output Amplitude (dBu)
HARMONIC DISTORTION PRODUCTS
vs FREQUENCY
HEADROOM - TOTAL HARMONIC DISTORTION+NOISE
vs OUTPUT AMPLITUDE
0.001
0.0001
1
0.1
VO = 1Vrms
RL = 2kΩ
f = 1kHz
RTO
RL = 600Ω
2nd Harmonic
0.010
0.001
0.0001
3rd Harmonic
RL = 600Ω
RL = 2kΩ
0.00001
0.000001
RL = 600Ω
Noise Limited)
RL = 2kΩ,
100kΩ
(
20
100
1k
10k 20k
0
5
10
15
20
25
30
Frequency (Hz)
Output Amplitude (dBu)
OUTPUT VOLTAGE NOISE SPECTRAL DENSITY
vs FREQUENCY
OUTPUT NOISE VOLTAGE
vs NOISE BANDWIDTH
10k
1k
100
10
1
100
10
0.1
1
10
100
1k
10k
100k
1M
1
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
®
4
INA137, INA2137
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±18V, and G = 1/2, unless otherwise noted.
GAIN vs FREQUENCY
COMMON-MODE REJECTION vs FREQUENCY
100
80
10
0
–10
–20
–30
60
RTO
40
1k
10k
100k
1M
10M
1k
10k
100k
Frequency (Hz)
1M
Frequency (Hz)
CHANNEL SEPARATION vs FREQUENCY
RL = 100kΩ
POWER SUPPLY REJECTION vs FREQUENCY
RTO
130
120
110
100
90
120
100
80
60
40
20
0
RL = 2kΩ
–PSR
+PSR
Dual Devices
100
20
1k
10k 20k
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
40
30
20
10
0
80
60
G = 1/2
VS = ±18V
40
20
0
–20
–40
–60
–80
VREF = 0V
RL = 2kΩ
100
1k
10k
100k
1M
10M
–20
–15
–10
–5
0
5
10
15
20
Frequency (Hz)
Output Voltage (V)
®
5
INA137, INA2137
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±18V, and G = 1/2, unless otherwise noted.
QUIESCENT CURRENT vs TEMPERATURE
SLEW RATE vs TEMPERATURE
4
3
2
1
0
16
14
12
10
8
–SR
+SR
–75
–50
–25
0
25
50
75
100
125
–75
–50
–25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
SHORT-CIRCUIT CURRENT vs TEMPERATURE
QUIESCENT CURRENT vs SUPPLY VOLTAGE
80
60
3
2
1
0
40
+ISC
20
0
–20
–40
–60
–80
–ISC
–75
–50
–25
0
25
50
75
100
125
±4
±6
±8
±10
±12
±14
±16
±18
Temperature (°C)
Supply Voltage (V)
OFFSET VOLTAGE DRIFT
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
PRODUCTION DISTRIBUTION
30
25
20
15
10
5
35
30
25
20
15
10
5
Typical Production Distribution
of Packaged Units.
Typical Production
Distribution of
Packaged Units.
0
0
Offset Voltage Drift (µV/°C)
Offset Voltage (µV)
®
6
INA137, INA2137
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = ±18V, and G = 1/2, unless otherwise noted.
SMALL-SIGNAL OVERSHOOT
vs LOAD CAPACITANCE
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
17
16
15
14
13
12
70
60
50
40
30
20
10
0
–55°C
25°C
125°C
85°C
–12
–13
–14
–15
–16
–17
85°C
125°C
RL = 2kΩ
100mV Step
25°C
–55°C
0
200
400
600
800
1000 1200
0
±20
±40
Output Current (mA)
±60
±80
Load Capacitance (pF)
LARGE-SIGNAL STEP RESPONSE
CL = 100pF
SMALL-SIGNAL STEP RESPONSE
CL = 100pF
C
L = 500pF
1µs/div
1µs/div
®
7
INA137, INA2137
The INA137 and INA2137 have excellent distortion charac-
teristics. THD+Noise is below 0.001% throughout the audio
frequency range. Up to approximately 10kHz distortion is
below the measurement limit of commonly used test equip-
ment. Furthermore, distortion remains relatively flat over its
wide output voltage swing range (approximately 1.7V from
either supply).
APPLICATIONS INFORMATION
The INA137 and INA2137 are differential line receivers
suitable for a wide range of audio and general-purpose
applications. Figure 1 shows the basic G = 1/2 (–6dB)
differential receiver configuration. The input and feedback
resistors can be reversed to achieve G = 2 (+6dB), as shown
in Figure 2. For applications requiring G = 1 (0dB), the
INA134 and INA2134 are recommended.
OFFSET VOLTAGE TRIM
Decoupling capacitors are strongly recommended for appli-
cations with noisy or high impedance power supplies. The
capacitors should be placed close to the device pins as
shown in Figure 1. All circuitry is completely independent
in the dual version assuring lowest crosstalk and normal
behavior when one amplifier is overdriven or short-cir-
cuited.
The INA137 and INA2137 are laser trimmed for low offset
voltage and drift. Most applications require no external offset
adjustment. Figure 3 shows an optional circuit for trimming
the output offset voltage. The output is referred to the output
reference terminal (pin 1), which is normally grounded. A
voltage applied to the Ref terminal will be summed with the
output signal. This can be used to null offset voltage as
shown in Figure 3. The source impedance of a signal applied
to the Ref terminal should be less than 10Ω to maintain good
common-mode rejection.
As shown in Figure 1, the differential input signal is con-
nected to pins 2 and 3. The source impedances connected to
the inputs must be nearly equal to assure good common-
mode rejection. A 5Ω mismatch in source impedance will
degrade the common-mode rejection of a typical device to
approximately 77dB (RTO). If the source has a known
impedance mismatch, an additional resistor in series with
the opposite input can be used to preserve good common-
mode rejection.
INA137
R2
R1
–In
V2
5
2
6
6kΩ
12kΩ
V–
V+
VO = 2 (V3 – V2)
1µF
1µF
R4
R3
+In
V3
4
7
3
1
INA137
6kΩ
12kΩ
R1
R2
–In
V2
2
5
6
12kΩ
6kΩ
FIGURE 2. G = 2 Differential Receiver.
V
O = 1/2 (V3 – V2)
G = 1/2
INA137
R1
12kΩ
R2
6kΩ
R3
R4
+In
V3
1
3
2
5
6
V2
12kΩ
6kΩ
VO
FIGURE 1. G = 1/2 Differential Receiver (Basic Power
Supply and Signal Connections).
R3
12kΩ
20Ω
3
V3
AUDIO PERFORMANCE
R4
The INA137 and INA2137 were designed for enhanced ac
performance. Very low distortion, low noise, and wide band-
width provide superior performance in high quality audio
applications. Laser-trimmed matched resistors provide opti-
mum common-mode rejection (typically 90dB), especially
when compared to circuits implemented with an op amp
and discrete precision resistors. In addition, high slew rate
(14V/µs) and fast settling time (3µs to 0.01%) ensure excel-
lent dynamic performance.
6kΩ
+15V
1
V
O = 1/2 (V3 – V2)
250kΩ
Offset Adjustment
Range = ±1mV
100kΩ
10Ω
–15V
FIGURE 3. Offset Adjustment.
®
8
INA137, INA2137
INA137
G = 2
6kΩ
INA137
6kΩ
12kΩ
2
5
6
V1
12kΩ
1/2
OPA2134
2
5
6
1
–In
V0 = 2V1 + V2
6kΩ
R2
1
3
V1
V2
12kΩ
R1
V0
0utput
R2
FIGURE 4. Precision Summing Amplifier.
6kΩ
12kΩ
1/2
OPA2134
3
V2
+In
INA137
12kΩ
6kΩ
2
5
–In
VO = 2 (1 + 2R2/R1) (V2 –V1)
6
1
3
6
VO
BUF634
FIGURE 6. High Input Impedance Instrumentation Amplifier.
12kΩ
6kΩ
3
+In
FIGURE 5. Boosting Output Current.
The difference amplifier is a highly versatile building
block that is useful in a wide variety of applications. See
the INA105 data sheet for additional applications ideas,
including:
• Precision Voltage-to-Current Converter with Differential
Inputs
• Differential Input Voltage-to-Current Converter for Low
IOUT
• Current Receiver with Compliance to Rails
• ±10V Precision Voltage Reference
• ±5V Precision Voltage Reference
• Isolating Current Source
• Differential Output Difference Amplifier
• Isolating Current Source with Buffering Amplifier for
Greater Accuracy
• Precision Average Value Amplifier
• Precision Bipolar Offsetting
• Window Comparator with Window Span and Window
Center Inputs
• Precision Summing Amplifier with Gain
• Instrumentation Amplifier Guard Drive Generator
• Precision Summing Instrumentation Amplifier
• Precision Absolute Value Buffer
• Precision Voltage-Controlled Current Source with Buff-
ered Differential Inputs and Gain
®
9
INA137, INA2137
PACKAGE OPTION ADDENDUM
www.ti.com
12-Jan-2007
PACKAGING INFORMATION
Orderable Device
INA137PA
Status (1)
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
PDIP
P
8
50 Green (RoHS & CU NIPDAU N / A for Pkg Type
no Sb/Br)
INA137PAG4
INA137UA
PDIP
SOIC
SOIC
SOIC
SOIC
PDIP
PDIP
SOIC
SOIC
SOIC
SOIC
P
D
D
D
D
N
N
D
D
D
D
8
50 Green (RoHS & CU NIPDAU N / A for Pkg Type
no Sb/Br)
8
100 Green (RoHS & CU NIPDAU Level-3-260C-168 HR
no Sb/Br)
INA137UA/2K5
INA137UA/2K5G4
INA137UAG4
INA2137PA
8
2500 Green (RoHS & CU NIPDAU Level-3-260C-168 HR
no Sb/Br)
8
2500 Green (RoHS & CU NIPDAU Level-3-260C-168 HR
no Sb/Br)
8
100 Green (RoHS & CU NIPDAU Level-3-260C-168 HR
no Sb/Br)
14
14
14
14
14
14
25 Green (RoHS & CU NIPDAU N / A for Pkg Type
no Sb/Br)
INA2137PAG4
INA2137UA
25 Green (RoHS & CU NIPDAU N / A for Pkg Type
no Sb/Br)
58
2500
2500
58
Pb-Free
(RoHS)
CU NIPDAU Level-3-260C-168 HR
CU NIPDAU Level-3-260C-168 HR
CU NIPDAU Level-3-260C-168 HR
CU NIPDAU Level-3-260C-168 HR
INA2137UA/2K5
INA2137UA/2K5E4
INA2137UAE4
Pb-Free
(RoHS)
Pb-Free
(RoHS)
Pb-Free
(RoHS)
(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.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
12-Jan-2007
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 2
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
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Products
Amplifiers
Data Converters
DSP
Interface
Applications
Audio
Automotive
Broadband
Digital Control
Military
amplifier.ti.com
dataconverter.ti.com
dsp.ti.com
interface.ti.com
logic.ti.com
www.ti.com/audio
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/military
Logic
Power Mgmt
Microcontrollers
Low Power Wireless
power.ti.com
microcontroller.ti.com
www.ti.com/lpw
Optical Networking
Security
Telephony
Video & Imaging
Wireless
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
www.ti.com/wireless
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