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LM8272

www.ti.com

SNOS515D –OCTOBER 2000–REVISED MARCH 2013

LM8272 Dual RRIO, High Output Current & Unlimited Cap Load Op Amp in Miniature

Package

Check for Samples: LM8272

FEATURES

DESCRIPTION

The LM8272 is a Rail-to-Rail input and output Op

= 12V, T

= 25°C, Typical values unless

Amp which can operate with a wide supply voltage

specified).

range. This device has high output current drive,

• GBWP 15MHz

greater than Rail-to-Rail input common mode voltage

• Wide supply voltage range 2.5V to 24V

range, unlimited capacitive load drive capability while

requiring only 0.95mA/channel supply current. It is

• Slew rate 15V/µs

specifically designed to handle the requirements of

• Supply current/channel 0.95mA

flat panel TFT panel V

COM

driver applications as well

• Cap load tolerance Unlimited

as being suitable for other low power, and medium

speed applications which require ease of use and

• Output short circuit current ±130mA

enhanced performance over existing devices.

• Output current (1V from rails) ±65mA

Greater than Rail-to-Rail input common mode voltage

• Input common mode voltage 0.3V beyond rails

range with 50dB of Common Mode Rejection, allows

• Input voltage noise 15nV/√Hz

high side and low side sensing, among many

• Input current noise 1.4pA/√Hz

applications, without having any concerns over

exceeding the range and no compromise in accuracy.

Exceptionally wide operating supply voltage range of

APPLICATIONS

2.5V to 24V alleviates any concerns over functionality

• TFT-LCD flat panel V

COM

driver

under extreme conditions and offers flexibility of use

• A/D converter buffer

in multitude of applications. In addition, most device

parameters are insensitive to power supply variations;

• High side/low side sensing

this design enhancement is yet another step in

• Headphone amplifier

simplifying its usage.

The LM8272 is offered in the 8-pin VSSOP package.

Connection Diagram

Figure 1. 8-Pin VSSOP Figure 2. Large Signal Step Response for Various

Cap. Load

Top View

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.

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (22 pages)

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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 LM8272 Dual RRIO, High Output Current & Unlimited Cap Load Op Amp in Miniature Package Check for Samples: LM8272 FEATURES DESCRIPTION 1 (VS = 12V, TA = 25°C, Typical values unless specified). 2 • • • • • • • • • • GBWP 15MHz Wide supply voltage range 2.5V to 24V Slew rate 15V/µs Supply current/channel 0.95mA Cap load tolerance Unlimited Output short circuit current ±130mA Output current (1V from rails) ±65mA Input common mode voltage 0.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Absolute Maximum Ratings (1) (2) 2KV (3) 200V (4) ESD Tolerance VIN Differential +/−10V See (5) (6) Output Short Circuit Duration Supply Voltage (V+ - V−) 27V V+ +0.3V, V− −0.3V Voltage at Input/Output pins −65°C to +150°C Storage Temperature Range Junction Temperature (7) +150°C Soldering Information: (1) (2) (3) (4) (5) (6) (7) Infrared or Convection (20 sec.) 235°C Wave Soldering (10 sec.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 5V Electrical Characteristics (continued) Unless otherwise specified, all limited guaranteed for TJ = 25°C, V+ = 5V, V− = 0V, VCM = 0.5V, VO = V+/2, and RL > 1MΩ to V−. Boldface limits apply at the temperature extremes. Symbol VO ISC Parameter Condition − Typ (1) Limit (2) Units V min Output Swing High RL = 10kΩ to V 4.93 4.85 ISOURCE = 5mA 4.85 4.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com 12V Electrical Characteristics (continued) Unless otherwise specified, all limited guaranteed for TJ = 25°C, V+ = 12V, V− = 0V, VCM = 6V, VO = 6V, and RL > 1MΩ to V−. Boldface limits apply at the temperature extremes. Symbol VO ISC Parameter Condition + Typ (1) Limit (2) Units V min Output Swing High RL 10kΩ to V /2 11.8 11.7 ISOURCE = 5mA 11.6 11.5 Output Swing Low RL = 10kΩ to V+/2 0.25 0.3 ISINK = 5mA .40 .
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 Typical Performance Characteristics VOS Distribution VOS vs. VCM for 3 Representative Units Figure 3. Figure 4. VOS vs. VCM for 3 Representative Units VOS vs. VCM for 3 Representative Units Figure 5. Figure 6. VOS vs. VS for 3 Representative Units VOS vs. VS for 3 Representative Units Figure 7. Figure 8.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) 6 VOS vs. VS for 3 Representative Units IB vs. VS Figure 9. Figure 10. IB vs. VS IS vs. VCM Figure 11. Figure 12. IS vs. VCM IS vs. VS Figure 13. Figure 14.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 Typical Performance Characteristics (continued) IS vs. VS CMRR vs. Frequency Figure 15. Figure 16. +PSRR vs. Frequency −PSRR vs. Frequency Figure 17. Figure 18. Open Loop Gain/Phase for Various Supplies Closed Loop Frequency Response for Various Gains Figure 19. Figure 20.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) 8 Closed Loop Frequency Response for Various Gains Closed Loop Frequency Response for Various Gains RL Figure 21. Figure 22. Maximum Output Swing vs. Load (1% Distortion) Maximum Output Swing vs. Frequency (1% Distortion) Figure 23. Figure 24. Closed Loop Small Signal Frequency Response for Various CL Overshoot vs. Cap Load Figure 25. Figure 26.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Settling Time (±1%) & Slew Rate vs. Cap Load VOUT from V+ vs. ISOURCE Figure 27. Figure 28. VOUT from V− vs. ISINK Step Response for Various Amplitudes Figure 29. Figure 30. Step Response for Various Amplitudes Large Signal Step Response for Various Cap Loads Figure 31. Figure 32.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) 10 THD+N vs. Input Amplitude for Various Frequency Input Referred Noise Density Figure 33. Figure 34. Closed Loop Output Impedance vs. Frequency Crosstalk Rejection vs. Frequency Figure 35. Figure 36.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 APPLICATION NOTES BLOCK DIAGRAM AND OPERATIONAL DESCRIPTION A) INPUT STAGE: As can be seen from the simplified schematic in Figure 37, the input stage consists of two distinct differential pairs (Q1-Q2 and Q3-Q4) in order to accommodate the full Rail-to-Rail input common mode voltage range. The voltage drop across R5, R6, R7 and R8 is kept to less than 200mV in order to allow the input to exceed the supply rails.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Figure 38. Input Stage Current vs. Differential Input Voltage B) OUTPUT STAGE: The output stage (see Figure 37) is comprised of complimentary NPN and PNP common-emitter stages to permit voltage swing to within a Vce(sat) of either supply rail. Q9 supplies the sourcing and Q10 supplies the sinking current load.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 DRIVING CAPACTIVE LOADS: The LM8272 is specifically designed to drive unlimited capacitive loads without oscillations (see Settling Time and Slew Rate vs. Cap load plot, Figure 27). In addition, the output current handling capability of the device allows for good slewing characteristics even with large capacitive loads (Settling Time and Slew Rate vs. Cap Load plot).
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com Figure 40. Steady State Output Sinking Characteristics with Load Lines OUTPUT SHORT CIRCUIT CURRENT AND DISSIPATION ISSUES: The LM8272 output stage is designed for maximum output current capability.
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LM8272 www.ti.com SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 The table entries are normalized to VS2/RL. To figure out the AC load current component of power dissipation, simply multiply the table entry corresponding to the output waveform by the factor VS2/RL. For example, with ±12V supplies, a 600Ω load, and triangular waveform power dissipation in the output stage is calculated as: PAC = (46.9 × 10−3) · [242/600] = 45.
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LM8272 SNOS515D – OCTOBER 2000 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision C (March 2013) to Revision D • 16 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM8272MM VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM8272MM/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM8272MMX/NOPB VSSOP DGK 8 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM8272MM VSSOP DGK 8 1000 210.0 185.0 35.0 LM8272MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LM8272MMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.
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