LMH6321www.ti.com                                                                                                   SNOSAL...
LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007                                                                         ...
LMH6321www.ti.com                                                                                        SNOSAL8B – APRIL ...
LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007                                                                         ...
LMH6321www.ti.com                                                                                             SNOSAL8B – A...
LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007                                                                         ...
LMH6321www.ti.com                                                                                                         ...
LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007                                                                         ...
LMH6321www.ti.com                                                                                                         ...
LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007                                                                         ...
LMH6321www.ti.com                                                                                                         ...
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
Lmh6321
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Lmh6321

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Lmh6321

  1. 1. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 LMH6321 300 mA High Speed Buffer with Adjustable Current Limit Check for Samples: LMH63211FEATURES • High capacitive load drive•2 High slew rate 1800 V/μs • Thermal shutdown error flag• Wide bandwidth 110 MHz APPLICATIONS• Continuous output current ±300 mA• Output current limit tolerance ±5 mA ±5% • Line driver• Wide supply voltage range 5V to ±15V • Pin driver• Wide temperature range −40°C to +125°C • Sonar driver• Adjustable current limit • Motor controlDESCRIPTIONThe LMH6321 is a high speed unity gain buffer that slews at 1800 V/µs and has a small signal bandwidth of 110MHz while driving a 50Ω load. It can drive ±300 mA continuously and will not oscillate while driving largecapacitive loads.The LMH6321 features an adjustable current limit. The current limit is continuously adjustable from 10 mA to 300ma with a ±5 mA ±5% accuracy. The current limit is set by adjusting an external reference current with a resistor.The current can be easily and instantly adjusted, as needed by connecting the resistor to a DAC to form thereference current. The sourcing and sinking currents share the same current limit.The LMH6321 is available in a space saving 8-pin PSOP or a 7-pin TO-263 power package. The PSOP packagefeatures an exposed pad on the bottom of the package to increase its heat sinking capability. The LMH6321 canbe used within the feedback loop of an operational amplifier to boost the current output or as a stand alonebuffer.Connection Diagram 1 8 EF NC 2 7 + CL V G=1 3 6 VIN VOUT - 4 5 V GND Figure 1. 8-Pin PSOP1 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.2 All trademarks are the property of their respective owners.PRODUCTION DATA information is current as of publication date. Copyright © 2006–2007, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
  2. 2. LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 www.ti.com G=1 1 2 3 4 5 6 7 VOUT + GND EF CL VIN - V V A. V− pin is connected to tab on back of each package. Figure 2. 7-Pin TO-263(A) These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.Absolute Maximum Ratings (1) (2)ESD Tolerance Human Body Model 2.5 kV Machine Model 250VSupply Voltage 36V (±18V) (3)Input to Output Voltage ±5VInput Voltage ±VSUPPLY (4)Output Short-Circuit to GND ContinuousStorage Temperature Range −65°C to +150°CJunction Temperature (TJMAX) +150°CLead Temperature (Soldering, 10 seconds) 260°C (5)Power DissipationCL Pin to GND Voltage ±1.2V(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics Table.(2) Human Body Model is 1.5 kΩ in series with 100 pF. Machine Model is 0Ω in series with 200 pF.(3) If the input-output voltage differential exceeds ±5V, internal clamping diodes will turn on. The current through these diodes should be limited to 5 mA max. Thus for an input voltage of ±15V and the output shorted to ground, a minimum of 2 kΩ should be placed in series with the input.(4) The maximum continuous current must be limited to 300 mA. See the Application Hints section for more details.(5) The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = TJ(MAX)–TA)/θJA. See Thermal Management section of the Application Hints.Operating RatingsOperating Temperature Range −40°C to +125°COperating Supply Range 5V to ±16VThermal Resistance (θJA), (1) PSOP Package 180°C/WThermal Resistance (θJC) TO-263 Package 4°C/WThermal Resistance (θJA) TO-263 Package 80°C/W(1) Soldered to PC board with copper foot print equal to DAP size. Natural convection (no air flow). Board material is FR-4.2 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LMH6321
  3. 3. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007±15V Electrical CharacteristicsThe following specifications apply for Supply Voltage = ±15V, VCM = 0, RL ≥ 100 kΩ and RS = 50Ω, CL open, unless otherwisenoted. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Min Typ Max UnitsAV Voltage Gain RL = 1 kΩ, VIN = ±10V 0.99 0.995 V/V 0.98 RL = 50Ω, VIN = ±10V 0.86 0.92 V/V 0.84VOS Input Offset Voltage RL = 1 kΩ, RS = 0V ±4 ±35 mV ±52IB Input Bias Current VIN = 0V, RL = 1 kΩ, RS = 0V ±2 ±15 μA ±17R.IN Input Resistance R.L = 50Ω 250 kΩCIN Input Capacitance 3.5 pFRO Output Resistance IO = ±10 mA 5 ΩIS Power Supply Current RL = ∞, VIN = 0 11 14.5 16.5 mA 750 µA into 14.9 18.5 CL Pin 20.5VO1 Positive Output Swing IO = 300 mA, RS = 0V, VIN = ±VS 11.2 11.9 10.8 V Negative Output Swing IO = 300 mA, RS = 0V, VIN = ±VS −11.3 −10.3 −9.8VO2 Positive Output Swing RL = 1 kΩ, RS = 0V, VIN = ±VS 13.1 13.4 12.9 V Negative Output Swing RL = 1 kΩ, RS = 0V, VIN = ±VS −13.4 −12.9 −12.6VO3 Positive Output Swing RL = 50Ω, RS = 0V, VIN = ±VS 11.6 12.2 11.2 V Negative Output Swing RL = 50Ω, RS = 0V, VIN = ±VS −11.9 −10.9 −10.6VEF Error Flag Output Voltage RL = ∞, VIN = 0, Normal 5.00 EF pulled up with 5 kΩ During 0.25 V to +5V Thermal ShutdownTSH Thermal Shutdown Temperature Measure Quantity is Die (Junction) 168 Temperature °C Hysteresis 10ISH Supply Current at Thermal EF pulled up with 5 kΩ to +5V 3 mA ShutdownPSSR Power Supply Rejection Ratio RL = 1 kΩ, VIN = 0V, Positive 58 66 VS = ±5V to ±15V 54 dB Negative 58 64 54SR Slew Rate VIN = ±11V, RL = 1 kΩ 2900 V/μs VIN = ±11V, RL = 50Ω 1800BW −3 dB Bandwidth VIN = ±20 mVPP, RL = 50Ω 110 MHzLSBW Large Signal Bandwidth VIN = 2 VPP, RL = 50Ω 48 MHz ndHD2 2 Harmonic Distortion VO = 2 VPP, f = 100 kHz RL = 50Ω −59 RL = 100Ω −70 dBc VO = 2 VPP, f = 1 MHz RL = 50Ω −57 RL = 100Ω −68Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LMH6321
  4. 4. LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 www.ti.com±15V Electrical Characteristics (continued)The following specifications apply for Supply Voltage = ±15V, VCM = 0, RL ≥ 100 kΩ and RS = 50Ω, CL open, unless otherwisenoted. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Min Typ Max UnitsHD3 3rd Harmonic Distortion VO = 2 VPP, f = 100 kHz RL = 50Ω −59 RL = 100Ω −70 dBc VO = 2 VPP, f = 1 MHz RL = 50Ω −62 RL = 100Ω −73en Input Voltage Noise f ≥ 10 kHz 2.8 nV/in Input Current Noise f ≥ 10 kHz 2.4 pA/ISC1 Output Short Circuit Current VO = 0V, Sourcing 4.5 10 15.5 Source (1) Program Current VIN = +3V 4.5 15.5 into CL = 25 µA mA Sinking 4.5 10 15.5 VIN = −3V 4.5 15.5 VO = 0V Sourcing 280 295 308 Program Current VIN = +3V 273 325 into CL = 750 µA mA Sinking 280 295 310 VIN = −3V 275 325ISC2 Output Short Circuit Current RS = 0V, VIN = +3V (1) (2) 320 570 750 Source 300 920 mA Output Short Circuit Current Sink RS = 0V, VIN = −3V (1) (2) 300 515 750 305 910V/I SectionCLVOS Current Limit Input Offset Voltage RL = 1 kΩ, GND = 0V ±0.5 ±4.0 mV ±8.0CLIB Current Limit Input Bias Current RL = 1 kΩ −0.5 −0.2 μA −0.8CL Current Limit Common Mode RL = 1 kΩ, GND = −13 to +14V 60 69 dBCMRR Rejection Ratio 56(1) VIN = + or −4V at TJ = −40°C.(2) For the condition where the CL pin is left open the output current should not be continuous, but instead, should be limited to low duty cycle pulse mode such that the RMS output current is less than or equal to 300 mA.4 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LMH6321
  5. 5. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007±5V Electrical CharacteristicsThe following specifications apply for Supply Voltage = ±5V, VCM = 0, RL ≥ 100 kΩ and RS = 50Ω, CL Open, unless otherwisenoted. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Min Typ Max UnitsAV Voltage Gain RL = 1 kΩ, VIN = ±3V 0.99 0.994 0.98 V/V RL = 50Ω, VIN = ±3V 0.86 0.92 0.84VOS Offset Voltage RL = 1 kΩ, RS = 0V ±2.5 ±35 mV ±50IB Input Bias Current VIN = 0V, RL = 1 kΩ, RS = 0V ±2 ±15 μA ±17RIN Input Resistance RL = 50Ω 250 kΩCIN Input Capacitance 3.5 pFRO Output Resistance IOUT = ±10 mA 5 ΩIS Power Supply Current RL = ∞, VIN = 0V 10 13.5 mA 14.7 750 μA into CL Pin 14 17.5 19.5VO1 Positive Output Swing IO = 300 mA, RS = 0V, VIN = ±VS 1.3 1.9 0.9 V Negative Output Swing IO = 300 mA, RS = 0V, VIN = ±VS −1.3 −0.5 −0.1VO2 Positive Output Swing RL = 1 kΩ, RS = 0V, VIN = ±VS 3.2 3.5 V 2.9 Negative Output Swing RL = 1 kΩ, RS = 0V, VIN = ±VS −3.5 −3.1 V −2.9VO3 Positive Output Swing RL = 50Ω, RS = 0V, VIN = ±VS 2.8 3.1 V 2.5 Negative Output Swing RL = 50Ω, RS = 0V, VIN = ±VS −3.0 −2.6 V −2.4PSSR Power Supply Rejection Ratio RL = 1 kΩ, VIN = 0, Positive 58 66 VS = ±5V to ±15V 54 dB Negative 58 64 54ISC1 Output Short Circuit Current VO = 0V, Program Current Sourcing 4.5 9 14.0 into CL = 25 μA VIN = +3V 4.5 15.5 Sinking 4.5 9 14.0 VIN = −3V 4.5 15.5 mA VO = 0V, Program Current Sourcing 275 290 305 into CL = 750 μA VIN = +3V 270 320 Sinking 275 290 310 VIN = −3V 270 320ISC2 Output Short Circuit Current RS = 0V, VIN = +3V (1) (2) 300 470 Source mA (1) (2) Output Short Circuit Current Sink RS = 0V, VIN = −3V 300 400SR Slew Rate VIN = ±2 VPP, RL = 1 kΩ 450 V/μs VIN = ±2 VPP, RL = 50Ω 210BW −3 dB Bandwidth VIN = ±20 mVPP, RL = 50Ω 90 MHzLSBW Large Signal Bandwidth VIN = 2 VPP, RL = 50Ω 39 MHzTSD Thermal Shutdown Temperature 170 °C Hysteresis 10V/I Section(1) For the condition where the CL pin is left open the output current should not be continuous, but instead, should be limited to low duty cycle pulse mode such that the RMS output current is less than or equal to 300 mA.(2) VIN = + or −4V at TJ = −40°C.Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LMH6321
  6. 6. LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 www.ti.com±5V Electrical Characteristics (continued)The following specifications apply for Supply Voltage = ±5V, VCM = 0, RL ≥ 100 kΩ and RS = 50Ω, CL Open, unless otherwisenoted. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Min Typ Max UnitsCLVOS Current Limit Input Offset RL = 1 kΩ, GND = 0V 2.7 +5 mV Voltage ±5.0CLIB Current Limit Input Bias Current RL = 1 kΩ, CL = 0V −0.5 −0.2 μA −0.6CL Current Limit Common Mode RL = 1 kΩ, GND = −3V to +4V 60 65 dBCMRR Rejection Ratio 566 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LMH6321
  7. 7. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 Typical Performance Characteristics Overshoot vs. Capacitive Load Slew Rate 60 3000 UNDERSHOOT 2600 RL = 1 k: 50 2200 SLEW RATE (V/Ps) OVERSHOOT (%) 40 1800 OVERSHOOT 30 1400 RL = 50: 20 1000 VIN = 100 mVPP 10 600 RL = OPEN VS = ±15V 0 200 0 4 8 12 16 20 10 100 1k 10k SUPPLY VOLTAGE (±V) CL (pF) Slew Rate Small Signal Step Response 3000 OUTPUT SIGNAL VS = ±15V 2600 RL = 1 k: 2200 SLEW RATE (V/Ps) VIN = 200 mVPP (100 mV/DIV) 1800 RL = 1 k: VS = ±5V RL = 50: INPUT SIGNAL 1400 1000 600 200 0 4 8 12 16 20 24 TIME (10 ns/DIV) INPUT AMPLITUDE (VPP) Input Offset Voltage of Amplifier vs. Small Signal Step Response Supply Voltage 10 OUTPUT SIGNAL 25° C INPUT OFFSET VOLTAGE (mV) 85° C 9 VIN = 200 mVPP (100 mV/DIV) RL = 1 k: VS = ±15V 8 INPUT SIGNAL 125° C -40° C 7 6 TIME (10 ns/DIV) 3 5 7 9 11 13 15 SUPPLY VOLTAGE (±V) Small Signal Step Response Small Signal Step Response OUTPUT SIGNAL OUTPUT SIGNAL VIN = 200 mVPP VIN = 200 mVPP (100 mV/DIV) (100 mV/DIV) RL = 50: RL = 50: VS = ±5V VS = ±15V INPUT SIGNAL INPUT SIGNAL TIME (10 ns/DIV) TIME (10 ns/DIV)Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LMH6321
  8. 8. LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 www.ti.com Typical Performance Characteristics (continued) Large Signal Step Response—Leading Edge Large Signal Step Response—Leading Edge VIN = 20 VPP VIN = 20 VPP OUTPUT SIGNAL OUTPUT SIGNAL RL = 1 k: RL = 50: VS = ±15V VS = ±15V (5V/DIV) (5V/DIV) INPUT SIGNAL INPUT SIGNAL TIME (5 ns/DIV) TIME (5 ns/DIV) Large Signal Step Response — Trailing Edge Large Signal Step Response — Trailing Edge VIN = 20 VPP VIN = 20 VPP OUTPUT SIGNAL OUTPUT SIGNAL RL = 1 k: RL = 50: VS = ±15V VS = ±15V (5V/DIV) (5V/DIV) INPUT SIGNAL INPUT SIGNAL TIME (5 ns/DIV) TIME (5 ns/DIV) Large Signal Step Response Large Signal Step Response RL = 1 k: RL = 50: VS = ±5V VS = ±15V VOUT (0.5V/DIV) VOUT (2V/DIV) TIME (20 ns/DIV) TIME (20 ns/DIV) Large Signal Step Response Large Signal Step Response RL = 50: RL = 1 k: VS = ±5V VS = ±15V VOUT (0.5V/DIV) VOUT (2V/DIV) TIME (20 ns/DIV) TIME (20 ns/DIV)8 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LMH6321
  9. 9. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 Typical Performance Characteristics (continued) Harmonic Distortion with 50Ω Load Harmonic Distortion with 100Ω Load -20 -20 VS = ±15V VS = ±15V f = 1 MHz f = 1 MHz -30 -30 HD2 and HD3 (dBc) HD2 and HD3 (dBc) -40 HD2 -40 -50 HD2 -50 -60 -60 HD3 -70 -70 HD3 -80 -80 0 5 10 15 20 25 30 0 5 10 15 20 25 30 OUTPUT AMPLITUDE (VPP) OUTPUT AMPLITUDE (VPP) Noise vs. Harmonic Distortion with 50Ω Load Frequency -30 10000 VS = ±15V -35 R = 50: L f = 100 kHz 1000 -40 HD2 HD2 & HD3 (dBc) -45 100 VOLTAGE nV/ Hz) NOISE -50 10 -55 HD3 CURRENT pA/ Hz) -60 1.0 -65 -70 0.1 0 5 10 15 20 25 1.0 10 100 1k 10k 100k OUTPUT VOLTAGE (V) FREQUENCY (Hz) Gain Gain vs. vs. Frequency Frequency 5 5 0 0 -5 -5 GAIN (dB) GAIN (dB) -10 -10 -15 -15 -20 -20 VS = ±5V VS = ±15V RL = 50: RL = 50: -25 -25 100k 1M 10M 100M 1G 100k 1M 10M 100M 1G FREQUENCY (Hz) FREQUENCY (Hz)Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LMH6321
  10. 10. LMH6321SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 www.ti.com Typical Performance Characteristics (continued) Gain Gain vs. vs. Frequency Frequency 5 5 0 0 -5 -5 GAIN (dB) GAIN (dB) -10 -10 -15 -15 VS = ±15V VS = ±5V RL = 1 k: RL = 1 k: -20 -20 100k 1M 10M 100M 1G 100k 1M 10M 100M 1G FREQUENCY (Hz) FREQUENCY (Hz) Supply Current Output Impedance vs. vs. Supply Voltage Sourcing Current 14 5.2 125° C VS = ±5V -40° C 12 85° C 5 OUTPUT IMPEDANCE (:) SUPPLY CURRENT (mA) 10 25° C -40° C 4.8 8 125° C 6 4.6 4 25° C 85° C 4.4 2 0 4.2 1 3 5 7 9 11 13 15 17 19 5 7 9 11 13 15 17 19 SUPPLY VOLTAGE (±V) SOURCING CURRENT (mA) Output Impedance Output Impedance vs. vs. Sinking Current Sourcing Current 5.6 5 VS = ±5V VS = ±15V -40° C 5.4 4.8 OUTPUT IMPEDANCE (:) OUTPUT IMPEDANCE (:) -40° C 5.2 4.6 125° C 25° C 5 4.4 4.8 4.2 85° C 125° C 85° C 25° C 4.6 4 5 7 9 11 13 15 17 19 5 7 9 11 13 15 17 19 SINKING CURRENT (mA) SOURCING CURRENT (mA)10 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LMH6321
  11. 11. LMH6321www.ti.com SNOSAL8B – APRIL 2006 – REVISED APRIL 2007 Typical Performance Characteristics (continued) Output Impedance vs. Output Short Circuit Current—Sourcing vs. Sinking Current Program Current 5.2 400 VS = ±15V VS = ±15V 5 OUTPUT IMPEDANCE (:) OUTPUT CURRENT (mA) -40° C 300 125° C 4.8 85° C -40° C 200 25° C 25° C 4.6 100 4.4 85° C 125° C 4.2 0 5 7 9 11 13 15 17 19 25 125 225 325 425 525 625 725 825 SINKING CURRENT (mA) PROGRAM CURRENT (PA) Output Short Circuit Current—Sinking vs. Output Short Circuit Current—Sourcing vs. Program Current Program Current 400 400 VS = ±5V VS = ±15V OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 300 300 125° C 125° C -40° C -40° C 200 85° C 200 85° C 25° C 25° C 100 100 0 0 25 125 225 325 425 525 625 725 825 25 125 225 325 425 525 625 725 825 PROGRAM CURRENT (PA) PROGRAM CURRENT (PA) Positive Output Swing Output Short Circuit Current—Sinking vs. vs. Program Current Sourcing Current 400 4 VS = ±5V 125° C 3.5 85° C OUTPUT CURRENT (mA) 300 3 OUTPUT SWING (V) 125° C 2.5 25° C -40° C 200 85° C 2 -40° C 25° C 1.5 100 1 VS = ±5V + 0.5 VIN = V CL = OPEN 0 0 25 125 225 325 425 525 625 725 825 0 100 200 300 400 500 PROGRAM CURRENT (PA) SOURCING CURRENT (mA)Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LMH6321

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