National Semiconductor LM6172 Dual High Speed, Power, Distor

Datasheets.org.uk - 100 Million Datasheets from 7500 Manufacturers.

National Semiconductor LM6172 Dual High Speed, Power, Distor

Datasheet Thumbnail

Top Searches for this datasheet

L.5D1154 DlGlbb? 40fl
National Semiconductor
LM6172
Dual High Speed, Power, Distortion, Voltage Feedback Amplifiers
LM6172 dual high speed voltage feedback amplifier. unity-gain stable provides excellent performance. With unity-gain bandwidth, 3000V/fis slew rate output current channel, LM6172 offers high performance dual amplifiers; only consumes supply current each channel. LM6172 operates power supply systems requiring large voltage swings, such ADSL, scanners ultrasound equipment. also specified power supply voltage applications such portable video systems.
LM6172 built with National's advanced VIPhi (Vertically Integrated PNP) complementary bipolar process. LM6171 datasheet single amplifier with these same features.
Features (Typical Unless Otherwise Noted)
Easy Voltage Feedback Topology
High Slew Rate 3000V/jus
Wide Unity-Gain Bandwidth
Supply Current mA/Channel
High Output Current mA/channel
Specified +15V Operation
Applications
Scanner l-to-V Converters
ADSL/HDSL Drivers
Multimedia Broadcast Systems
Video Amplifiers
NTSC, SECAM Systems
ADC/DAC Buffers
Pulse Amplifiers Peak Detectors
LM6172 Driving Capacitive Load
|C|_=150
5V/div
5V/div
Connection Diagram
8-Pin DIP/SO
L=1000
TL/H/12581-50
Ordering Information
NON-INVERTING INPUT
NON-INVERTING 'INPUT
TL/H/12581-1
View
Package Temperature Range Transport Media Drawing
Industrial Military
8-Pin LM6172IN Rails N08E
8-Pin CDIP 5962-9560401QPA* Rails J08A
8-Pin Small Outline LM6172IM Rails M08A
LM6172IMX Tape Reel
*For military temperature grade, please refer Military Datasheet MNLM6172AMJ/883. NSID military temp grade LM6172AMJ-QML.
trademark National Semiconductor Corporation.
registered trademark used under license from Advanced Micro Devices, Inc.
National Semiconductor Corporation TL/H/12583
RRD-B20M26/Printed
This Material Copyrighted Respective Manufacturer
Absolute Maximum Ratings <Note
Military/Aerospace specified devices required, please contact National Semiconductor Sales Office/Distributors availability specifications.
Tolerance (Note
Human Body Model
Machine Model 300V
Supply Voltage (V+-
Differential Input Voltage (Note
Output Short Circuit Ground (Note Continuous Storage Temp. Range
Maximum Junction Temperature (Note
Operating Ratings (Note
Supply Voltage 5.5V Junction Temperature Range
LM6172I Thermal Resistance (0ja)
Package, 8-Pin Molded
Package, 8-Pin Surface Mount
Electrical Characteristics Unless otherwise specified, limits guaranteed +15V, 15V, kil. Boldface limits apply temperature extremes
Symbol Parameter Conditions (Note LM6172I Limit (Note Units
Input Offset Voltage
Input Offset Voltage Average Drift
input Bias Current
Input Offset Current 0.02
Input Resistance Common Mode
Differential Mode
Open Loop Output Resistance
CMRR Common Mode Rejection Ratio
PSRR Power Supply Rejection Ratio
Large Signal Voltage Gain (Note
Output Swing 13.2 12.5
-13.1 -12.5
100ft
-8.5
Continuous Output Current (Open Loop) (Note Sourcing,
Sinking, 100fl
bS01124
http://www.national.com
This Material Copyrighted Respective Manufacturer
Electrical Characteristics (Continued) Unless otherwise specified, limits guaranteed 15V, -15V, kil. Boldface limits apply temperature extremes
Symbol
Parameter
Conditions
(Note
LM6172I
Limit (Note
Units
Output Short Circuit Current
Soureing
Sinking
-105
Supply Current
Both Amplifiers
Electrical Characteristics
Unless otherwise specified, +15V, -15V,
Symbol Parameter Conditions LM6172I (Note Units
Slew Rate 3000 V/fls
+2,v|m 2500 V/fis
Unity-Gain Bandwidth
Frequency
Bandwidth Matching between Channels
Phase Margin
Settling Time (0.1%) -1,V0UT=
Differential Gain (Note 0.28
<f>D Differential Phase (Note
Input-Referred Voltage Noise ,/Hz
Input-Referred Current Noise
Second Harmonic -110
Distortion (Note
Third Harmonic -105
Distortion (Note
b501124 OlDlbb^
This Material Copyrighted Respective Manufacturer
Electrical Characteristics Unless otherwise specified, limits guaranteed +5V, -5V, kil. Boldface limits apply temperature extremes
Symbol Parameter Conditions (Note LM6172I Limit (Note Units
Input Offset Voltage
Input Offset Voltage Average Drift nV/'C
Input Bias Current
Input Offset Current 0.02
Input Resistance Common Mode
Differential Mode
Output Resistance
CMRR Common Mode Rejection Ratio
PSRR Power Supply Rejection Ratio
Large Signal Voltage Gain (Note
10011
Output Swing
-3.3 -3.1
ioon
-2.7 -2.4 -2.3
Continuous Output Current (Open Loop) (Note Sourcing, 100il
Sinking, 100il
Output Short Circuit Current Sourcing
Sinking
Supply Current Both Amplifiers
bSGllS4 OlDlbTO
http://www.national.com
This Material Copyrighted Respective Manufacturer
Electrical Characteristics
Unless otherwise specified, +5V, -5V,
Symbol Parameter Conditions LM6172 (Note Units
Slew Rate V/fts
Unity-Gain Bandwidth
Frequency
Phase Margin
Settling Time (0.1%) -1,V0UT=
Differentia! Gain (Note
<f>D Differential Phase (Note
Input-Referred Voltage Noise VH5~
Input-Referred Current Noise
Second Harmonic -110
Distortion (Note
Third Harmonic -105
Distortion (Note
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device intended functional, specific performance guaranteed. guaranteed specifications test conditions, Electrical Characteristics. Note Human body model, series with Machine Model, 200n series with Note Continuous short circuit operation result exceeding maximum allowed junction temperature 150"C.
Note maximum power dissipation function Tj<max), 0ja, maximum allowable power dissipation ambient temperature (Tj(max) T/O/flja- numbers apply packages soldered directly into board. Note Typical Values represent most likely parametric norm. Note limits guaranteed testing statistical analysis.
Note Large signal voltage gain total output swing divided input signal required produce that swing. Vout Vour
Note open loop output current output swing with 100ii load resistor divided that resistor.
Note Differential gain phase measured with 3.58 both input output 75il terminated.
Note Differential input voltage applied 15V.
Note Harmonics measured with 100fl.
b501ieM 01Dlb71
This Material Copyrighted Respective Manufacturer
Typical Performance Characteristics unless otherwise noted, (Continued)
Supply Voltage Supply Current
12.5 17.5 Supply Voltaga (IV)
TL/H/12581-14
Input Bias Current Temperature
-55-35-15 Tamparatura
TL/H/12581-17
Output Voltage Output Current 15V)
-90-70-50-30-10 Output Currant (mA)
TL/H/12581-36
PSRR Frequency
Poait
100k Fraquaney (Hz)
TL/H/12581-20
Supply Current Temperature
415V
Tamparatura
TL/H/12581-15
Short Circuit Current Temperature (Sourclng)
-35-15 105110 Currant (mA)
TL/H/125S1-18
Output Voltage Output Current
tri-
Output Currant (mA)
TL/H/125S1-37
PSRR Frequency
Positi
100k Fraquancy (Hz)
TL/H/12581-3
Input Offset Voltage Temperature
-55-35-15 105125 Tamparotura
TL/H/12581-16
Short Circuit Current Temperature (Sinking)
-100 -120 -130
-55-35-15 Currant (mA)
TUH/12581-35
CMRR Frequency
5V->
100k Fraquancy (Hz)
TL/H/12581-19
Open-Loop Frequency Response
100k S00M
Fraquancy (Hz)
TL/H/12581-21
b5Di:L2i4 01Dlb7S
This Material Copyrighted Respective Manufacturer
Typical Performance Characteristics unless otherwise noted, (Continued)
Open-Loop Frequency Response
IOOU
Frequency (Hz)
TL/H/12581
Gain-Bandwidth Product Supply Voltage Different Temperature
12.5 17.5 Supply Voltage
Large Signal Voltage Gain Load
1000 1500 2000 Load Resistor (fl)
TL/H/12581-38
Large Signal Voltage Gain Load
1000 1500 2000 Load Resistor (fl)
TL/H/12581-39
Input Voltage Noise Frequency
took
frequency (Hz)
TL/H/12581
Input Voltage Noise Frequency
100k Frequency (Hz)
TL/H/12581
Input Current Noise Frequency
100k Frequency (Hz)
TL/H/12581-42
Input Current Noise Frequency
100k
Frequency (Hz)
TL/H/12581
Slew Rate Supply Voltage
Supply Voilage
TL/H/12581-25
Slew Rate Input Voltage
3456769 Input Voltage (Vp_p)
TL/H/12581
Large Signal Pulse Response +1,VS
ns/div)
TL/H/12581-2
L^OUSi* OlOlt.73
This Material Copyrighted Respective Manufacturer
Typical Performance Characteristics unless otherwise noted, (continued) Small Signal Pulse Response Large Signal Pulse Response Smalt Signal Pulse Response +1,VS
ns/div) TL/H/12581-3 Large Signal Pulse Response +2,VS Timo ns/div) TL/H/12581-4 Small Signal Pulse Response +2,VS Tine ns/div) TL/H/12581 Large Signal Pulse Response
Time ns/div) Small Signal Pulse Response +2,VS Time ns/div) TL/H/12581-? Large Signal Pulse Response Time ns/div) TL/H/12581-8 Small Signal Pulse Response
lima ns/div) TL/H/12581-9 Large Signal Pulse Response -1,VS= Time ns/div) TL/H/12581-10 Small Signal Pulse Response -1,VS= Time ns/div) TL/H/12581 Closed Loop Frequency Response Supply Voltage
Time ns/div) TL/H/12581 Time ns/div) TL/H/12581 100M FREQUENCY (Hz) TL/H/12581
bSOllSM 0101b74 bMfi
This Material Copyrighted Respective Manufacturer
Typical Performance Characteristics unless otherwise noted, (Continued)
Closed Loop Frequency Response Supply Voltage (AV=
Harmonic Distortion Frequency 15V)
Harmonic Distortion Frequency (VS=
IDOfl
Harir
Harmonic
100M
FREQUENCY (Hi)
TL/H/12581-29
Crosstalk Rejection Frequency
100k
Frequency (Hz)
TL/H/12581-30
100k
Frequency (HzJ
TL/H/12581-34
Maximum Power Dissipation Ambient Temperature
~100 -120 -160
100k Frequency (Hz)
Temperature
TL/H/12581-31
LM6172 Simplified Schematic
TL/H/12581
TL/H/12581-55
bS01124 01Qlb?5
This Material Copyrighted Respective Manufacturer
Application Notes
LM6172 Performance Discussion
LM6172 dual high-speed, power, voltage feedback amplifier. unity-gain stable offers outstanding performance with only supply current channel. combination unity-gain bandwidth, 3000V/jus slew rate, channel output current other attractive features makes easy implement LM6172 various applications. Quiescent power LM6172 operating supply supply.
LM6172 Circuit Operation
class input stage LM6172 fully symmetrical similar slewing characteristic current feedback amplifiers. LM6172 Simplified Schematic, through form equivalent current feedback input buffer, equivalent feedback resistor, stage buffers inverting input. triple-buffered output stage isolates gain stage from load provide output impedance.
LM6172 Slew Rate Characteristic
slew rate LM6172 determined current available charge discharge internal high impedance node capacitor. This current differential input voltage divided total degeneration resistor Therefore, slew rate proportional input voltage level, higher slew rates achievable lower gain configurations.
When very fast large signal pulse applied input amplifier, some overshoot undershoot occurs. placing external series resistor such input LM6172, slew rate reduced help lower overshoot, which reduces settling time.
Reducing Settling Time
LM6172 very fast slew rate that causes overshoot undershoot. reduce settling time LM6172, resistor placed series with input signal decrease slew rate. feedback capacitor also used reduce overshoot undershoot. This feedback capacitor serves zero increase stability amplifier circuit. feedback capacitor recommended initial evaluation. When LM6172 configured buffer, feedback resistor must added parallel feedback capacitor.
Another possible source overshoot undershoot comes from capacitive load output. Please section "Driving Capacitive Loads" more detail.
Driving Capacitive Loads
Amplifiers driving capacitive loads oscillate have ringing output. eliminate oscillation reduce ringing, isolation resistor placed shown Figure combination isolation resistor load capacitor forms pole increase stability adding more phase margin overall system. desired performance depends value isolation resistor; bigger isolation resistor, more damped (slow) pulse response becomes. LM6172, 50S1 isolation resistor recommended initial evaluation.
bSQ1124 DlOlbTb
TL/H/12581
FIGURE Isolation Resistor Used Drive Capacitive Load
V0UT<SV/div)
TL/H/12581-51
FIGURE LM6172 Driving Load with 30il Isolation Resistor
V|N(5V/div)
V0UT(5V/div)
TL/H/12581-52
FIGURE LM6172 Driving Load with Isolation Resistor
Layout Consideration
PRINTED CIRCUIT BOARDS HIGH SPEED AMPS
There many things consider when designing boards high speed amps. Without proper caution, very easy have excessive ringing, oscillation other degraded performance high speed circuits. rule, signal traces should short wide provide inductance impedance paths. unused board space needs grounded reduce stray signal pickup. Critical components should also grounded common point eliminate voltage drop. Sockets capacitance board affect frequency performance. better solder amplifier directly into board without using socket.
http://www.national.com
This Material Copyrighted Respective Manufacturer
Application Notes (Continued)
USING PROBES
Active (FET) probes ideal taking high frequency measurements because they have wide bandwidth, high input impedance input capacitance. However, probe ground leads provide long ground loop that will produce errors measurement. Instead, probes grounded directly removing ground leads probe jackets using scope probe jacks.
COMPONENTS SELECTION FEEDBACK RESISTOR
important high speed applications keep component leads short because wires aire inductive high frequency. discrete components, choose carbon composition-type resistors mica-type capacitors. Surface mount components preferred over discrete components minimum inductive effect.
Large values feedback resistors couple with parasitic capacitance cause undesirable effects such ringing oscillation high speed amplifiers. LM6172, feedback resistor less than gives optimal performance.
Compensation input Capacitance
combination amplifier's input capacitance with gain setting resistors adds pole that cause peaking oscillation. solve this problem, feedback capacitor with value
C,n)/Rf
used cancel that pole. LM6172, feedback capacitor recommended. Figure illustrates compensation circuit.
FIGURE Compensating Input Capacitance
Power Supply Bypassing
Bypassing power supply necessary maintain power supply impedance across frequency. Both positive negative power supplies should bypassed individually placing 0.01 ceramic capacitors directly power supply pins tantalum capacitors close power supply pins.
TL/H/12581-47
FIGURE Power Supply Bypassing
Termination
high frequency applications, reflections occur signals properly terminated. Figure shows properly terminated signal while Figure shows improperly terminated signal.
20ns/div
FIGURE Properly Terminated Signal
20ns/div
TL/H/12581
FIGURE Improperly Terminated Signal
minimize reflection, coaxial cable with matching characteristic impedance signal source should used. other cable should terminated with same value terminator resistor. commonly used cables, RG59 characteristic impedance, RG58 50ii characteristic impedance.
1,501124 01Dlb77
This Material Copyrighted
Respective Manufacturer
http://www.national.coni
Application Notes (Continued) Power Dissipation
maximum power allowed dissipate device defined
(Tj(max) Ta)/0ja Where power dissipation device Tj(max) maximum temperature ambient temperature <?jA thermal resistance particular package example, LM6172 SO-8 package, maximum power dissipation ambient temperature
Thermal resistance, 6ja, depends parameters such size, package size package material. smaller size package, higher becomes. 8-pin package lower thermal resistance than that 8-pin Therefore, higher dissipation capability, 8-pin package.
Application Circuits
total power dissipated device calculated
quiescent power dissipated device with load connected output. power dissipated device with load connected output; power dissipated load. Furthermore,
supply current total supply voltage with load output current (voltage difference between supply
voltage output voltage same supply) example, total power dissipated LM6172 with both channels swinging output voltage into
2[(2.3 mA)(30V)l 2[(10 mA)(15V 10V)]
l-to-V Converters
-Wv-
'out '"V.
from
TL/H/12581-48
Differential Line Driver
-vw-
-AW-
"AW-
Coaxial Cable
Coaxial Cabla
TL/H/12581
bSDUSH 01Glb7fi
http://www.natiQnal.com
This Material Copyrighted Respective Manufacturer
Physical Dimensions inches (millimeters)
R0.010
nmmmj
.220 0.310 >.291 GLAS!
0.150 0.125 0.200
8-Lead Ceramic Dual-ln-Line Package Order Number LM6172AMJ-QML 5962-9560401QPA Package Number J08A
0.228 0.244 (4.800 5.084)
(5.791
{0.254)
LEAD I0ENT
0.010-0.0211.
(0.254 0.508)
0.150 0.157
.>10 3.988)
LEAOS
(0.2D3 0.254) LEADS
0.004 (0.102) LEAD TIPS
(0.406-1.270) LEADS
0.014
0.004 -0.010 (0.102 -0.254)
(1.270)
(0.358-O.Wfl)
M0BAIREV
8-Lead (0.150'' Wide) Molded Small Outline Package, JEDEC Order Number LM6172IM LM6172IMX Package Number M08A
bSOl OlOlt?^ http://wvw.national.com
This Material Copyrighted Respective Manufacturer
bSG1124
Physical Dimensions inches (millimeters) (Continued)
#108256-001
373-DdOO
0.092 (2.337) IDENT
OPTION
0.032 0.005 pJlLUj,
(0.813
IDENT
OPTION
8-Lead (0,300" Wide) Molded Dual-ln-Line Package Order Number LM6172IN Package Number N08E
LIFE SUPPORT POLICY
NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT NATIONAL SEMICONDUCTOR CORPORATION. used herein:
Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
National Semiconductor Corporation
1111 West Bardin Road Arlington, 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018
National Semiconductor Europe
Fax: 180-530 Email: europe.support@nsc.com Deutsch Tel: 180-530 English Tel: 180-532 Tel: 180-532 Itallano Tel: 180-534
National Semiconductor Hong Kong Ltd.
13th Floor, Straight Block, Ocean Centre, Canton Rd-Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960
National Semiconductor Japan Ltd.
Tel: 81-043-299-2308 Fax: 81-043-299-2408
National does assume responsibility drcuiby descrtoed, dnwrt paient licenses Implied Natiorial reserves light time
55475
This Material Copyrighted Respective Manufacturer

National Semiconductor LM6172 Dual High Speed, Power, Distor

Top Searches for this datasheet

Other recent searches