Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8

LM7321, LM7322

www.ti.com

SNOSAW8D –MAY 2008–REVISED MARCH 2013

LM7321/LM7321Q Single/ LM7322/LM7322Q Dual Rail-to-Rail Input/Output ±15V, High

Output Current and Unlimited Capacitive Load Operational Amplifier

Check for Samples: LM7321, LM7322

FEATURES

DESCRIPTION

The LM7321/LM7321Q/LM7322/LM7322Q are rail-to-

• (V

= ±15, T

= 25°C, Typical Values Unless

rail input and output amplifiers with wide operating

Specified.)

voltages and high output currents. The

• Wide Supply Voltage Range 2.5V to 32V

LM7321/LM7321Q/LM7322/LM7322Q are efficient,

• Output Current +65 mA/−100 mA

achieving 18 V/µs slew rate and 20 MHz unity gain

bandwidth while requiring only 1 mA of supply current

• Gain Bandwidth Product 20 MHz

per op amp. The

• Slew Rate 18 V/µs

LM7321/LM7321Q/LM7322/LM7322Q performance is

• Capacitive Load Tolerance Unlimited

fully specified for operation at 2.7V, ±5V and ±15V.

• Input Common Mode Voltage 0.3V Beyond

The LM7321/LM7321Q/LM7322/LM7322Q are

Rails

designed to drive unlimited capacitive loads without

oscillations. All LM7321/LM7321Q and

• Input Voltage Noise 15 nV/√Hz

LM7322/LM732Q parts are tested at −40°C, 125°C,

• Input Current Noise 1.3 pA/√Hz

and 25°C, with modern automatic test equipment.

• Supply Current/Channel 1.1 mA

High performance from −40°C to 125°C, detailed

• Distortion THD+Noise −86 dB

specifications, and extensive testing makes them

suitable for industrial, automotive, and

• Temperature Range −40°C to 125°C

communications applications.

• Tested at −40°C, 25°C and 125°C at 2.7V, ±5V,

Greater than rail-to-rail input common mode voltage

±15V.

range with 50 dB of common mode rejection across

• LM7321Q/LM7322Q are Automotive Grade

this wide voltage range, allows both high side and low

Products that are AEC-Q100 Grade 1 Qualified.

side sensing. Most device parameters are insensitive

to power supply voltage, and this makes the parts

APPLICATIONS

easier to use where supply voltage may vary, such as

automotive electrical systems and battery powered

• Driving MOSFETs and Power Transistors

equipment. These amplifiers have true rail-to-rail

• Capacitive Proximity Sensors

output and can supply a respectable amount of

• Driving Analog Optocouplers

current (15 mA) with minimal head- room from either

rail (300 mV) at low distortion (0.05% THD+Noise).

• High Side Sensing

There are several package options for each part.

• Below Ground Current Sensing

Standard SOIC versions of both parts make

• Photodiode Biasing

upgrading existing designs easy. LM7322LM7322Q

are offered in a space saving 8-Pin VSSOP package.

• Driving Varactor Diodes in PLLs

The LM7321/LM7321Q are offered in small SOT-23

• Wide Voltage Range Power supplies

package, which makes it easy to place this part close

• Automotive

to sensors for better circuit performance.

• International Power Supplies

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 (35 pages)

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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 LM7321/LM7321Q Single/ LM7322/LM7322Q Dual Rail-to-Rail Input/Output ±15V, High Output Current and Unlimited Capacitive Load Operational Amplifier Check for Samples: LM7321, LM7322 FEATURES DESCRIPTION • The LM7321/LM7321Q/LM7322/LM7322Q are rail-torail input and output amplifiers with wide operating voltages and high output currents.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS 10 12,200 pF VS = ±15V 25V/DIV 1 + VOUT from V (V) 8,600 pF 125°C VS = ±15V, AV = +1 85°C 0.1 2,200 pF 10 pF 25°C -40°C INPUT 0.01 0.1 1 10 100 5 Ps/DIV ISOURCE (mA) Figure 1. Output Swing vs. Sourcing Current Figure 2. Large Signal Step Response These devices have limited built-in ESD protection.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 2.7V Electrical Characteristics (1) Unless otherwise specified, all limits ensured for TA = 25°C, V+ = 2.7V, V− = 0V, VCM = 0.5V, VOUT = 1.35V, and RL > 1 MΩ to 1.35V. Boldface limits apply at the temperature extremes. Symbol Parameter Condition VOS Input Offset Voltage VCM = 0.5V & VCM = 2.2V TC VOS Input Offset Voltage Temperature Drift VCM = 0.5V & VCM = 2.2V Max (2) Units −5 −6 ±0.7 +5 +6 mV −2.0 −2.5 VCM = 2.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com 2.7V Electrical Characteristics (1) (continued) Unless otherwise specified, all limits ensured for TA = 25°C, V+ = 2.7V, V− = 0V, VCM = 0.5V, VOUT = 1.35V, and RL > 1 MΩ to 1.35V. Boldface limits apply at the temperature extremes. Symbol Parameter Condition Min (2) Typ (3) Max (2) Units GBW Gain Bandwidth f = 50 kHz 16 en Input Referred Voltage Noise Density f = 2 kHz 11.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 ±5V Electrical Characteristics (1) (continued) Unless otherwise specified, all limited ensured for TA = 25°C, V+ = 5V, V− = −5V, VCM = 0V, VOUT = 0V, and RL > 1 MΩ to 0V. Boldface limits apply at the temperature extremes.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com ±15V Electrical Characteristics (1) (continued) Unless otherwise specified, all limited ensured for TA = 25°C, V+ = 15V, V− = −15V, VCM = 0V, VOUT = 0V, and RL > 1MΩ to 15V. Boldface limits apply at the temperature extremes. Symbol CMRR Min Typ −15V ≤ VCM ≤ 12V 80 75 100 −15V ≤ VCM ≤ 15V 72 70 80 2.7V ≤ VS ≤ 30V, VCM = −14.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 CONNECTION DIAGRAMS N/C -IN - V 3 - +IN 4 -IN Figure 3. 5-Pin SOT-23 Top View V - 8 2 - 2 + +IN 1 3 4 + 7 6 5 N/C OUT A + -IN A OUT +IN A V N/C Figure 4. 8-Pin SOIC Top View V - 1 8 A 2 3 7 B + + V + 5 1 4 6 - OUT 5 + V OUT B -IN B +IN B Figure 5.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified: TA = 25°C. Output Swing vs. Sourcing Current Output Swing vs. Sinking Current 10 10 VOUT from V (V) 1 + VOUT from V (V) VS = 2.7V 125°C 85°C 0.1 VS = 2.7V 1 125°C 85°C 0.1 25°C 25°C -40°C 0.01 0.1 -40°C 1 10 0.01 0.1 100 1 ISOURCE (mA) Figure 6. Output Swing vs. Sourcing Current Output Swing vs.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. VOS Distribution VOS vs. VCM (Unit 1) -0.5 12 VS = ±5V 10 -0.9 -1.1 8 VOS (mV) PERCENTAGE (%) VS = 2.7V -0.7 6 4 -40°C -1.3 -1.5 25°C -1.7 85°C -1.9 -2.1 2 125°C -2.3 0 -2.5 -2 -3 -1 0 1 2 3 -1 0 1 2 VOS (mV) VCM (V) Figure 12. Figure 13. VOS vs. VCM (Unit 2) 3 4 3 4 VOS vs. VCM (Unit 3) 0 -0.5 VS = 2.7V VS = 2.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. VOS vs. VCM (Unit 2) VOS vs. VCM (Unit 1) -0.5 -1 VS = ±15V VS = ±5V -0.75 -40°C -1.25 VOS (mV) VOS (mV) -1.25 -40°C -1 25°C -1.5 -1.75 -1.5 25°C -1.75 85°C 85°C 125°C -2 -2 125°C -2.25 -2.5 -6 -4 -2 2 0 4 -2.25 -20 -15 -10 6 VCM (V) Figure 19. 10 15 20 VOS vs. VCM (Unit 3) -0.5 VS = ±15V -0.7 -0.2 VS = ±15V -0.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. VOS vs. VS (Unit 3) VOS vs. VS (Unit 1) -1 0 VCM = V +0.5V + VCM = V -0.5V -1.2 -0.5 VOS (mV) VOS (mV) -40°C -1 25°C -1.5 -40°C -1.4 -1.6 25°C 85°C -2 85°C -1.8 125°C 125°C -2 -2.5 0 5 10 15 20 25 30 35 0 40 5 10 15 20 VS (V) Figure 24. 35 40 VOS vs. VS (Unit 3) -1 + VCM = V+ -0.5V VCM = V -0.5V -0.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. IBIAS vs. VCM IBIAS vs. VS -1 1 VCM = V +0.5V VS = ±15V -1.1 0.5 85°C 125°C 0 IBIAS (PA) IBIAS (PA) -1.2 -0.5 -40°C -1.4 85°C 125°C 25°C -1.3 -1 -1.5 -1.5 -15 -40°C 25°C -10 -5 -1.6 0 5 10 0 15 5 10 15 VCM (V) Figure 30. VS = 2.7V 40 125°C 1.4 85°C -40°C 1.2 0.55 0.5 IS (mA) IBIAS (PA) 1.6 25°C 25°C 1 0.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. IS vs. VCM (LM7322) IS vs. VCM (LM7321) 4 2.5 VS = ±5V VS = ±15V 3.5 2 3 125°C IS (mA) IS (mA) 2.5 85°C 2 25°C 1.5 1.5 125°C 85°C 1 25°C -40°C 1 -40°C 0.5 0.5 0 -6 -4 -2 2 0 4 0 -20 -15 -10 6 -5 VCM (V) Figure 36. VS = ±15V 3.5 20 VCM = V +0.5V 125°C 1.2 3 85°C 1 25°C IS (mA) IS (mA) 15 - 1.4 85°C 2 10 IS vs.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. IS vs. VS (LM7322) Positive Output Swing vs. Supply Voltage 3 0.3 85°C RL = 2 k: 125°C 2.5 125°C 0.25 85°C 25°C 1.5 -40°C 1 0.2 -40°C 0.15 0.1 0.05 0.5 0 25°C VOUT from RAIL (V) IS (mA) 2 VCM = V +0.5V 5 0 10 15 20 25 30 35 0 40 0 10 20 VS (V) Figure 42. 40 Figure 43. Positive Output Swing vs.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. Open Loop Frequency Response with Various Resistive Load 120 PHASE 120 113 100 600: 100 140 158 VS = r15V CL = 20 pF 135 158 RL = 2 k: CL = 20 pF 135 PHASE 113 VS = 30V 90 10 k: 60 68 GAIN 40 100 k: 2 k: 600: 20 45 10 M: 0 -20 1k 10k 100k 1M 80 GAIN 40 20 0 0 68 VS = 30V 45 VS = 2.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. Small Signal Step Response Large Signal Step Response 12,200 pF VS = ±5V 1000 pF AV = +1 8,600 pF 100 mV/DIV 750 pF VS = ±15V, AV = +1 25V/DIV 500 pF 330 pF 2,200 pF 100 pF 10 pF 10 pF INPUT INPUT 200 ns/DIV 5 Ps/DIV Figure 54. Figure 55. Input Referred Noise Density vs. Frequency 1000 Input Referred Noise Density vs.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified: TA = 25°C. THD+N vs. Output Amplitude 0 THD+N vs. Output Amplitude 0 VS = 2.7V VS = ±5V -10 f = 1 kHz -10 VCM = 0.8V -20 f = 1 kHz -20 -30 A = +2 V -30 -40 -50 -60 -40 -50 -60 -70 -70 -80 -80 -90 0.001 RL = 100 k: AV = +2 THD+N (dB) THD+N (dB) RL = 100 k: 0.01 0.1 1 -90 0.001 10 0.01 Figure 60. THD+N vs.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION DRIVING CAPACITIVE LOADS The LM7321/LM7321Q/LM7322/LM7322Q are specifically designed to drive unlimited capacitive loads without oscillations as shown in Figure 64. Figure 64. ±5% Settling Time vs. Capacitive Load In addition, the output current handling capability of the device allows for good slewing characteristics even with large capacitive loads as shown in Figure 65 and Figure 66. Figure 65. +SR vs.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Figure 66. −SR vs. Capacitive Load The combination of these features is ideal for applications such as TFT flat panel buffers, A/D converter input amplifiers, etc. However, as in most op amps, addition of a series isolation resistor between the op amp and the capacitive load improves the settling and overshoot performance. Output current drive is an important parameter when driving capacitive loads.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Figure 67. Output Short Circuit Sourcing Current vs. Input Overdrive Figure 68. Output Short Circuit Sinking Current vs. Input Overdrive Figure 69 shows the output voltage, output current, and the resulting input overdrive with the device set for AV = +1 and the input tied to a 1 VPP step function driving a 47 nF capacitor.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Figure 69. Buffer Amplifier Scope Photo ESTIMATING THE OUTPUT VOLTAGE SWING It is important to keep in mind that the steady state output current will be less than the current available when there is an input overdrive present. For steady state conditions, the Output Voltage vs. Output Current plot (Typical Performance Characteristics section) can be used to predict the output swing.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com Figure 71. Output Sinking Characteristics with Load Lines SETTLING TIME WITH LARGE CAPACITIVE LOADS Figure 72 below shows a typical application where the LM7321/LM7321Q/LM7322/LM7322Q is used as a buffer amplifier for the VCOM signal employed in a TFT LCD flat panel: Figure 72. VCOM Driver Application Schematic Figure 73 shows the time domain response of the amplifier when used as a VCOM buffer/driver with VREF at ground.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Figure 73. VCOM Driver Performance Scope Photo OUTPUT SHORT CIRCUIT CURRENT AND DISSIPATION ISSUES The LM7321/LM7321Q/LM7322/LM7322Q output stage is designed for maximum output current capability.
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com 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 x 10−3) · (242/600) = 45.
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LM7321, LM7322 www.ti.com SNOSAW8D – MAY 2008 – REVISED MARCH 2013 Other Application Hints The use of supply decoupling is mandatory in most applications. As with most relatively high speed/high output current Op Amps, best results are achieved when each supply line is decoupled with two capacitors; a small value ceramic capacitor (∼0.01 μF) placed very close to the supply lead in addition to a large value Tantalum or Aluminum (> 4.7 μF).
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LM7321, LM7322 SNOSAW8D – MAY 2008 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision C (March 2013) to Revision D • 26 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 11-Apr-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-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 LM7321MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LM7321MF/NOPB SOT-23 DBV 5 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LM7321MFE/NOPB SOT-23 DBV 5 250 178.0 8.4 3.2 3.2 1.4 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM7321MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LM7321MF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM7321MFE/NOPB SOT-23 DBV 5 250 210.0 185.0 35.0 LM7321MFX/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LM7321QMF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM7321QMFE/NOPB SOT-23 DBV 5 250 210.0 185.0 35.
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