LT®1784 2.5MHz available small SOT-23 package that operates single spl
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LT1784 2.5MHz, Over-The-Top Power, Rail-to-Rail Input Output SOT-23 DESCRIPTION
LT®1784 2.5MHz available small SOT-23 package that operates single split supplies with total voltage 2.5V 18V. amplifier draws less than 750A quiescent current reverse battery protection, drawing negligible current reverse supply voltages 18V. input range LT1784 includes ground, unique feature this device Over-The-Top® operation capabilitity with either both inputs above positive rail. inputs handle both differential common mode, independent supply voltage. input stage incorporates phase reversal protection prevent false outputs from occurring even when inputs below negative supply. LT1784 drive loads 15mA still maintain rail-to-rail capability. shutdown feature 6-lead version disable part, making output high impedance reducing quiescent current LT1784 available 6-lead SOT-23 packages. applications requiring lower power, refer LT1782 LT1783 data sheets.
LTC, LTM, Linear Technology, Linear logo Over-The-Top registered trademarks Linear Technology Corporation. ThinSOT trademark Linear Technology Corporation. other trademarks property their respective owners.
Operates with Inputs Above Rail-to-Rail Input Output Gain Bandwidth Product: 2.5MHz Slew Rate: 2.1V/s Input Offset Voltage: 3.5mV High Voltage Gain: 1000V/mV Single Supply Input Range: Specified Supplies Reverse Battery Protection Power: 750A Supply Current Output Shutdown 6-Lead Version High Output Current: 15mA Operating Temperature Range: -40°C 85°C Profile (1mm) ThinSOTPackage
APPLICATIONS
Portable Instrumentation Battery-Powered Systems Sensor Conditioning Supply Current Sensing Amplifiers 20mA Transmitters
TYPICAL APPLICATION
Programmable Gain, 100kHz Amplifier
SHDN SHDN
Programmable Gain Amplifier Frequency Response
LT1784 GAIN (dB)
LT1782
9.09k
1784 TA01a
100k FREQUENCY (Hz)
1784 TA01b
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LT1784 ABSOLUTE MAXIMUM RATINGS
(Note
Total Supply Voltage .18V Input Differential Voltage .18V Input Voltage +24V/-10V Shutdown Voltage Above .18V Shutdown Current .±10mA Output Short-Circuit Duration (Note Indefinite
Operating Temperature Range (Note 10). -40°C 85°C Specified Temperature Range (Note -40°C 85°C Junction Temperature 150°C Storage Temperature Range -65°C 150°C Lead Temperature (Soldering, sec) 300°C
CONFIGURATION
VIEW
VIEW
SHDN
PACKAGE 5-LEAD PLASTIC TSOT-23 TJMAX 150°C, 250°C/W
PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX 150°C, 230°C/W
ORDER INFORMATION
LEAD FREE FINISH LT1784CS5#PBF LT1784IS5#PBF LT1784CS6#PBF LT1784IS6#PBF TAPE REEL LT1784CS5#TRPBF LT1784IS5#TRPBF LT1784CS6#TRPBF LT1784IS6#TRPBF PART MARKING LTJD LTSN LTIW LTIX PACKAGE DESCRIPTION 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 SPECIFIED TEMPERATURE RANGE -40°C 85°C -40°C 85°C -40°C 85°C -40°C 85°C
Consult Marketing parts specified with wider operating temperature ranges. Consult Marketing information non-standard lead based finish parts. more information lead free part marking, http://www.linear.com/leadfree/ more information tape reel specifications,
denotes specifications which apply over specified temperature range, otherwise specifications 25°C. VOUT half supply, 6-lead part VPIN5 pulse power tested unless otherwise specified.
SYMBOL PARAMETER Input Offset Voltage CONDITIONS 25°C 70°C -40°C 85°C -40°C 85°C (Note
ELECTRICAL CHARACTERISTICS
UNITS V/°C
Input Offset Voltage Drift (Note Input Offset Current
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LT1784 ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER Input Bias Current (Note SHDN -40°C 85°C 0.1Hz 10Hz 10kHz 10kHz Differential Common Mode, (VCC 1.2V) Common Mode,
denotes specifications which apply over specified temperature range, otherwise specifications 25°C. VOUT half supply, 6-lead part VPIN5 pulse power tested unless otherwise specified.
CONDITIONS
UNITS nA/°C VP-P nV/Hz pA/Hz V/mV V/mV V/mV V/mV V/mV V/mV
Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance
CMRR PSRR AVOL
Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note Power Supply Rejection Ratio Large-Signal Voltage Gain
1000
Output Voltage Swing
Output Voltage Swing HIGH
Short-Circuit Current (Note
1.2V (Note 12.5V, 500mV 2.5V, 70°C -40°C 85°C 500mV 4.5V, 70°C -40°C 85°C Load ISINK ISINK 10mA Load ISOURCE Load ISOURCE 10mA Short Short Short Short -100A
1000
2.885 2.600 4.885 4.400 12.5 20.0
ISHDN
Minimum Supply Voltage Reverse Supply Voltage Supply Current (Note Supply Current, Shutdown SHDN Current
2.93 4.93 0.05
VPIN5 Load (Note VPIN5 0.3V (On), Load (Note VPIN5 (Shutdown), Load (Note VPIN5 (Shutdown), Load (Note VPIN5 Load (Note VPIN5 18V, Load (Note (Note (Note VPIN5 (Note VPIN5 (Note
tOFF
Output Leakage Current, Shutdown Maximum SHDN Current SHDN Input Voltage SHDN Input High Voltage Turn-On Time Turn-Off Time
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LT1784 ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER Gain Bandwidth Product (Note Slew Rate (Note Full-Power Bandwidth (Note Settling Time Distortion
denotes specifications which apply over specified temperature range, otherwise specifications 25°C. VOUT half supply, 6-lead part VPIN5 pulse power tested unless otherwise specified.
CONDITIONS 5kHz 70°C -40°C 85°C 70°C -40°C 85°C VOUT 2VP-P VOUT 0.1%, 1.8VP-P 10k, 1kHz
UNITS
FPBW
0.001
denotes specifications which apply over specified temperature range, otherwise specifications 25°C. ±5V, VOUT 6-lead part VPIN5 pulse power tested unless otherwise specified.
SYMBOL VOS/T IB/T CMRR AVOL PARAMETER Input Offset Voltage CONDITIONS 25°C 70°C -40°C 85°C -40°C 85°C
3.75 4.50 4.80
UNITS V/°C nA/°C VP-P nV/Hz pA/Hz V/mV V/mV
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Input Offset Voltage Drift (Note Input Offset Current Input Bias Current Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing
70°C 0.1Hz 10Hz 1kHz 1kHz Differential Common Mode,
-4.996 -4.800 -4.650 4.92 4.75 4.65 0.05 -4.99 -4.60 -4.40
Output Voltage Swing HIGH
PSRR
Short-Circuit Current (Note Power Supply Rejection Ratio Supply Current Supply Current, Shutdown SHDN Current Maximum SHDN Current Output Leakage Current, Shutdown
±4V, 70°C Load ISINK ISINK 10mA Load ISOURCE ISOURCE 10mA Short 70°C ±1.5V
4.885 4.550 4.400
ISHDN
VPIN5 -3V, ±5V, Load (Note VPIN5 -4.7V (On), ±5V, Load (Note VPIN5 (Shutdown), ±5V, Load (Note VPIN5 (Note VPIN5 -7V, ±9V, Load (Note
LT1784 ELECTRICAL CHARACTERISTICS
SYMBOL tOFF PARAMETER SHDN Input Voltage SHDN Input High Voltage Turn-On Time Turn-Off Time Gain Bandwidth Product
denotes specifications which apply over specified temperature range, otherwise specifications 25°C. ±5V, VOUT 6-lead part VPIN5 pulse power tested unless otherwise specified.
CONDITIONS (Note (Note VPIN5 -5V, (Note VPIN5 (Note 5kHz 70°C -40°C 85°C ±4V, Measured 70°C -40°C 85°C VOUT 8VP-P VOUT 0.1%,
-4.7
UNITS
Slew Rate
1.55 1.30 1.20
FPBW
Full-Power Bandwidth (Note Settling Time
Note Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage device. Exposure Absolute Maximum Rating condition extended periods affect device reliability lifetime. Note heat sink required keep junction temperature below absolute maximum. Note limits guaranteed correlation tests. Note limits guaranteed correlation tests. Note Guaranteed correlation slew rate ±5V, tests.
Note This specification implies typical input offset voltage 5.7mV maximum input offset voltage 18mV 18V. Note This parameter 100% tested. Note Specifications apply 6-lead SOT-23 with shutdown. Note Full-power bandwidth calculated from slew rate. FPBW SR/2VP. Note LT1784C guaranteed functional over operating temperature range -40°C 85°C. Note LT1784C guaranteed meet specified performance from 70°C. LT1784C designed, characterized expected meet specified performance from -40°C 85°C tested sampled these temperatures. LT1784I guaranteed meet specified performance from -40°C 85°C.
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current Supply Voltage
INPUT OFFSET VOLTAGE CHANGE SUPPLY CURRENT SUPPLY VOLTAGE -55°C 125°C 25°C VOUT -100 -200 -300 -400 TOTAL SUPPLY VOLTAGE
1784
Minimum Supply Voltage
Output Voltage Large Input Voltage
125°C
-55°C 25°C
1784
1784
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LT1784 TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current Common Mode Voltage
300,000 OUTPUT SATURATION VOLTAGE 250,000 200,000 INPUT BIAS CURRENT (nA) 150,000 100,000 25°C -200 -400 0.01 COMMON MODE VOLTAGE
1784
Output Saturation Voltage Load Current (Output High)
OUTPUT SATURATION VOLTAGE ±2.5V 30mV
Output Saturation Voltage Load Current (Output Low)
2.5V 30mV
0.01
-55°C 125°C
125°C 25°C -55°C
0.001 1000 SINKING LOAD CURRENT (µA) 10000
1784
1000 SOURCING LOAD CURRENT
10000
1784
Output Saturation Voltage Input Overdrive
OUTPUT SATURATION VOLTAGE (mV) OUTPUT HIGH OUTPUT CURRENT (mA)
Output Short-Circuit Current Temperature
NOISE VOLTAGE (400nV/DIV)
0.1Hz 10Hz Noise Voltage
±2.5V
SINKING
OUTPUT
±2.5V LOAD INPUT OVERDRIVE (mV)
1784
SOURCING TEMPERATURE (°C) TIME (sec)
1784
1784
Noise Voltage Density Frequency
INPUT NOISE VOLTAGE DENSITY (nV/Hz) FREQUENCY (Hz) 100k
1784
Input Noise Current Frequency
INPUT NOISE CURRENT DENSITY (pA/Hz) GAIN (dB) FREQUENCY (Hz) 100k
1784
Gain Phase Shift Frequency
100k FREQUENCY (Hz) GAIN ±2.5V PHASE PHASE (DEG)
±2.5V
±2.5V
1784
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LT1784 TYPICAL PERFORMANCE CHARACTERISTICS
Gain Bandwidth Product Temperature
GAIN BANDWIDTH PRODUCT (MHz) RISING SLEW RATE (V/s) FALLING ±2.5V 5kHz GAIN BANDWIDTH PRODUCT (MHz)
Slew Rate Temperature
Gain Bandwidth Product Phase Margin Supply Voltage
5kHz PHASE MARGIN PHASE MARGIN (DEG) TOTAL SUPPLY VOLTAGE GAIN BANDWIDTH PRODUCT
TEMPERATURE (°C)
TEMPERATURE (°C)
1784
1784
1784
Gain Bandwidth Phase Margin Load Resistance
POWER SUPPLY REJECTION RATIO (dB) GAIN BANDWIDTH PRODUCT (MHz) PHASE MARGIN PHASE MARGIN (DEG)
PSRR Frequency
COMMON MODE REJECTION RATIO (dB) ±2.5V
CMRR Frequency
±2.5V
POSITIVE SUPPLY
GAIN BANDWIDTH PRODUCT
NEGATIVE SUPPLY
±2.5V 5kHz LOAD RESISTANCE 100k
1784
100k FREQUENCY (Hz)
1784
100k FREQUENCY (Hz)
1784
Output Impedance Frequency
±2.5V
Disabled Output Impedance Frequency
±2.5V VPIN 2.5V OUTPUT STEP
Settling Time 0.1% Output Step
OUTPUT IMPEDANCE
OUTPUT IMPEDANCE
100k
0.01
100k FREQUENCY (Hz)
1784
100k FREQUENCY (Hz)
1784
SETTLING TIME
1784
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LT1784 TYPICAL PERFORMANCE CHARACTERISTICS
Capacitive Load Handling Overshoot Capacitive Load
CAPACITIVE LOAD (pF) 1000
1784
Undistorted Output Swing Frequency
OUTPUT SWING (VP-P) DISTORTION
Total Harmonic Distortion Noise Frequency
VOUT 1.8VP-P
2.5V
OVERSHOOT
±2.5V
NOISE
0.01
0.001
100k FREQUENCY (Hz)
1784
0.0001
FREQUENCY (Hz)
100k
1784
Total Harmonic Distortion Noise Load Resistance
±1.5V NOISE NOISE TOTAL 2VP-P 1kHz
Total Harmonic Distortion Noise Output Voltage Amplitude
FREQUENCY 1kHz HALF SUPPLY INPUT OFFSET VOLTAGE CHANGE (50V/DIV)
Open-Loop Gain
0.01 0.1V 2.1V
±1.5V ±1.5V
0.001
0.01
0.0001
0.001 100k
1784
LOAD RESISTANCE GROUND
OUTPUT VOLTAGE AMPLITUDE (VP-P)
OUTPUT VOLTAGE
1784
1784
Supply Current SHDN Voltage
SUPPLY CURRENT SHUTDOWN VOLTAGE
1784
Large Signal Response
Small Signal Response
125°C 25°C -55°C 2V/DIV 20mV/DIV
15pF
5s/DIV
1784
15pF
2s/DIV
1784
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LT1784 APPLICATIONS INFORMATION
Supply Voltage positive supply LT1784 should bypassed with small capacitor (typically 0.1F) within inch pin. When driving heavy loads, additional 4.7F electrolytic capacitor should used. When using split supplies same true negative supply pin. LT1784 protected against reverse battery voltages 18V. event reverse battery condition occurs supply current less than 1nA. Inputs LT1784 input stages, (see Simplified Schematic), resulting three distinct operating regions shown "Input Bias Current Common Mode" Typical Performance Characteristic curve. input voltages about more below input stage active input bias current typically -250nA. When input common mode voltage within 0.6V positive rail, stage operating input bias current typically 500nA. Increases temperature will cause voltage which operation switches from input stage input stage move towards input offset voltage stage untrimmed typically 3mV. Schottky diode collector input transistors, along with special geometries these transistors, allow LT1784 operate with either both inputs above about 0.3V above input transistors fully saturated input bias current typically 200A room temperature. input offset voltage typically when operating above LT1784 will operate with inputs above regardless inputs protected against excursions much below internal resistor series with each input diode from input negative supply. input stage LT1784 incorporates phase reversal protection prevent output from phase reversing inputs below There clamping diodes between inputs maximum differential input voltage 18V. Output output LT1784 swing within 80mV positive rail within negative rail with load. When monitoring input voltages within 80mV positive rail within negative rail, gain should taken keep output from clipping. LT1784 typically sink source over 25mA supplies, sourcing current reduced 7.5mA total supplies noted Electrical Characteristics section. LT1784 internally compensated drive least 400pF capacitance under output loading conditions. 0.22F capacitor series with resistor between output ground will compensate these amplifiers larger capacitive loads, 10,000pF output currents. Distortion There main contributors distortion amps: output crossover distortion output transitions from sourcing sinking current, distortion caused nonlinear common mode rejection. operating inverting, there common mode induced distortion. operating input stage (input within V+), CMRR very good, typically 95dB. When LT1784 switches between input stages, there significant nonlinearity CMRR. Lower load resistance increases output crossover distortion effect input stage transition distortion. lowest distortion, LT1784 should operated single supply, with output always sourcing current with input voltage swing between ground 1V). Typical Performance Characteristics curve, "Total Harmonic Distortion Noise Output Voltage Amplitude." Gain open-loop gain almost independent load when output sourcing current. This optimizes performance single supply applications where load returned ground. Typical Performance Characteric curve "Open-Loop Gain" various loads shows details.
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LT1784 APPLICATIONS INFORMATION
Shutdown 6-lead part includes shutdown feature that disables part, reducing quiescent current making output high impedance. part shut down bringing SHDN 1.2V more above When shut down, supply current less than VOUT V+). normal operation, SHDN tied left floating. Typical Performance Characteristics curve, "Supply Current SHDN Voltage."
TYPICAL APPLICATIONS
Negative Rectifier Adjustable Clamp
LT1784
~80mV
WORKS WELL 100kHz
LT1784 VOUT
VCLAMP ~80mV WORKS WELL 100kHz
1784 TA02
SIMPLIFIED SCHEMATIC
SHDN 1.5k 1.5k 0.75k 0.75k
1784
LT1784 VCLAMP
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LT1784 PACKAGE DESCRIPTION
Package 5-Lead Plastic TSOT-23
(Reference 05-08-1635
0.62 0.95 2.90 (NOTE
1.22
3.85 2.62
2.80
1.50 1.75 (NOTE
RECOMMENDED SOLDER LAYOUT CALCULATOR 0.30 0.45 PLCS (NOTE
0.95
0.80 0.90 0.20 DATUM 1.00 0.01 0.10
0.30 0.50 0.09 0.20 (NOTE NOTE: DIMENSIONS MILLIMETERS DRAWING SCALE DIMENSIONS INCLUSIVE PLATING DIMENSIONS EXCLUSIVE MOLD FLASH METAL BURR MOLD FLASH SHALL EXCEED 0.254mm JEDEC PACKAGE REFERENCE MO-193
1.90
TSOT-23 0302
Package 6-Lead Plastic TSOT-23
(Reference 05-08-1636
0.62 0.95 2.90 (NOTE
1.22
3.85 2.62
2.80
1.50 1.75 (NOTE
RECOMMENDED SOLDER LAYOUT CALCULATOR
0.95
0.30 0.45 PLCS (NOTE
0.80 0.90 0.20 1.00 DATUM 0.01 0.10
0.30 0.50
NOTE: DIMENSIONS MILLIMETERS DRAWING SCALE DIMENSIONS INCLUSIVE PLATING DIMENSIONS EXCLUSIVE MOLD FLASH METAL BURR MOLD FLASH SHALL EXCEED 0.254mm JEDEC PACKAGE REFERENCE MO-193
0.09 0.20 (NOTE
1.90
TSOT-23 0302
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Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
LT1784 TYPICAL APPLICATIONS
Protected Fault Conditions
-18V
LT1784
LT1784
LT1784
LT1784
1784 TA03
REVERSE BATTERY
INPUT OVERVOLTAGE
INPUT DIFFERENTIAL VOLTAGE
INPUTS BELOW GROUND
Simple Peak Detector
Simple Supply Full Wave Rectifier
BANDWIDTH 3kHz 5.7kHz 116Hz 47kHz 34Hz 96kHz
LT1784
BAT54
ACCURACY
BAT54
LT1784
VOUT 3VP-P, 2.5V 100k
1784 TA04
WORKS WELL 15kHz
1785 TA05
Simple Polarity Selector
1V/DIV FOLLOW INVERT 1V/DIV
1785 TA06a
LT1784
SHDN
SHDN 5V/DIV 100s/DIV 3VP-P 5kHz
1785 TA06b
RELATED PARTS
PART NUMBER LT1782 LT1783 LT1797 LT1637 LT1638/LT1639 LT1880 DESCRIPTION Micropower Over-The-Top Rail-to-Rail In/Out SOT-23 1.25MHz Over-The-Top Rail-to-Rail In/Out SOT-23 10MHz Rail-to-Rail In/Out SOT-23 1.1MHz Over-The-Top Rail-to-Rail In/Out Dual/Quad 1.2MHz Over-The-Top Rail-to-Rail In/Out SOT-23 Pico Input, Precision, Rail-to-Rail Output COMMENTS Supply Current, 800V Offset Voltage 300A Supply Current, 800V Offset Voltage Unity-Gain Stable, 2.25V/s Slew Rate Micropower, 0.4V/s Slew Rate Micropower 230A Max, 0.4V/s Slew Rate 150V Offset, 900pA Bias Current
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Linear Technology Corporation
(408) 432-1900 FAX: (408) 434-0507
0609 PRINTED
1630 McCarthy Blvd., Milpitas, 95035-7417
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2000
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