Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOT 23 5

10k 100k

FREQUENCY (Hz)

100

1000

100

VOLTAGE NOISE

(nV/

Hz)

= 5V, 24V

VCO

INPUT

CHARGE

PUMP

OUTPUT

S_PLL

LM6211

www.ti.com

SNOSAH2C –FEBRUARY 2006–REVISED MARCH 2013

LM6211 Low Noise, RRO Operational Amplifier with CMOS Input and 24V Operation

Check for Samples: LM6211

FEATURES

• Temperature Range -40°C to 125°C

(Typical 24V Supply Unless Otherwise Noted)

• Total Harmonic Distortion 0.01% @ 1 kHz,

600Ω

• Supply Voltage Range 5V to 24V

• Output Short Circuit Current 25 mA

• Input Referred Voltage Noise 5.5 nV/√Hz

APPLICATIONS

• Unity Gain Bandwidth 20 MHz

• PLL Loop Filters

• 1/f Corner Frequency 400 Hz

• Low Noise Active Filters

• Slew Rate 5.6 V/μs

• Strain Gauge Amplifiers

• Supply Current 1.05 mA

• Low Noise Microphone Amplifiers

• Low Input Capacitance 5.5 pF

DESCRIPTION

The LM6211 is a wide bandwidth, low noise op amp with a wide supply voltage range and a low input bias

current. The LM6211 operates with a single supply voltage of 5V to 24V, is unity gain stable, has a ground-

sensing CMOS input stage, and offers rail-to-rail output swing.

The LM6211 is designed to provide optimal performance in high voltage, low noise systems. The LM6211 has a

unity gain bandwidth of 20 MHz and an input referred voltage noise density of 5.5 nV/√Hz at 10 kHz. The

LM6211 achieves these specifications with a low supply current of only 1 mA. The LM6211 has a low input bias

current of 2.3 pA, an output short circuit current of 25 mA and a slew rate of 5.6 V/us. The LM6211 also features

a low common-mode input capacitance of 5.5 pF which makes it ideal for use in wide bandwidth and high gain

circuits. The LM6211 is well suited for low noise applications that require an op amp with very low input bias

currents and a large output voltage swing, like active loop-filters for wide-band PLLs. A low total harmonic

distortion, 0.01% at 1 kHz with loads as high as 600Ω, also makes the LM6211 ideal for high fidelity audio and

microphone amplifiers.

The LM6211 is available in the small SOT-23 package, allowing the user to implement ultra-small and cost

effective board layouts.

Typical Application

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 (29 pages)

PAGE 1
LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 LM6211 Low Noise, RRO Operational Amplifier with CMOS Input and 24V Operation Check for Samples: LM6211 FEATURES 1 (Typical 24V Supply Unless Otherwise Noted) 2 • • • • • • • Supply Voltage Range 5V to 24V Input Referred Voltage Noise 5.5 nV/√Hz Unity Gain Bandwidth 20 MHz 1/f Corner Frequency 400 Hz Slew Rate 5.6 V/μs Supply Current 1.05 mA Low Input Capacitance 5.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com Absolute Maximum Ratings (1) (2) ESD Tolerance (3) Human Body Model 2000V Machine Model 200V VIN Differential ±0.3V Supply Voltage (VS = V+ – V−) 25V + V +0.3V, V −0.3V Voltage at Input/Output pins −65°C to +150°C Storage Temperature Range Junction Temperature (4) +150°C Soldering Information (1) (2) (3) (4) − Infrared or Convection (20 sec) 235°C Wave Soldering Lead Temp.
PAGE 3
LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 5V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2. Boldface limits apply at the temperature extremes. Symbol AVOL VO Large Signal Voltage Gain Output Swing High Output Swing Low IOUT Output Short Circuit Current IS Slew Rate GBW Gain Bandwidth Product en Input-Referred Voltage Noise in VO = 0.35V to 4.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com 24V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 24V, V− = 0V, VCM = VO = V+/2. Boldface limits apply at the temperature extremes. Symbol AVOL VO Large Signal Voltage Gain Output Swing High Output Swing Low IOUT Min (2) Typ (3) VO = 1.5V to 22.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 Typical Performance Characteristics Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2. Supply Current vs. Supply Voltage VOS vs. Supply Voltage 0.8 1.4 1.2 125°C 0.6 125°C 0.4 25°C 1.1 25°C 0.2 1 0.9 VOS (mV) SUPPLY CURRENT (mA) 1.3 -40°C 0.8 0 -40°C -0.2 0.7 -0.4 0.6 -0.6 0.5 5 7 11 13 15 17 19 21 23 25 9 5 7 11 13 15 17 19 21 23 25 9 VS (V) VS (V) Figure 2. Figure 3. VOS vs.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2. Input Bias Current vs. VCM Input Bias Current vs. VCM 4 2 VS = 24V VS = 24V 2 -40°C 0 IBIAS (nA) IBIAS (pA) 0 -2 25°C -4 125°C -2 -4 -6 -8 0 2 4 6 8 -6 10 12 14 16 18 20 22 0 4 6 8 10 12 14 16 18 20 22 VCM (V) Figure 8. Figure 9. Sourcing Current vs. Supply Voltage Sinking Current vs.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2. Positive Output Swing vs. Supply Voltage Negative Output Swing vs.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2. Slew Rate vs. Supply Voltage Overshoot and Undershoot vs. Capacitive Load 6 OVERSHOOT AND UNDERSHOOT (%) 70 SLEW RATE (V/Ps) 5.8 5.6 FALLING EDGE 5.4 5.2 RISING EDGE 5 4.8 4.6 4.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, TA = 25°C, VS = 24V, V+ = VS, V− = 0 V, VCM = VS/2. Closed Loop Output Impedance vs. Frequency PSRR vs. Frequency 100 0 -20 10 VS = 5V, -PSRR PSRR (dB) ZOUT (:) -40 1 0.1 VS = 5V VS = 24V, -PSRR -60 -80 0.01 -100 VS = 24V 0.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 APPLICATION NOTES ADVANTAGES OF THE LM6211 High Supply Voltage, Low Power Operation The LM6211 has performance ensured at supply voltages of 5V and 24V. The LM6211 is ensured to be operational at all supply voltages between 5V and 24V. In this large range of operation, the LM6211 draws a fairly constant supply current of 1 mA, while providing a wide bandwidth of 20 MHz.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com STABILITY OF OP AMP CIRCUITS Stability and Capacitive Loading GAIN The LM6211 is designed to be unity gain stable for moderate capacitive loads, around 100 pF. That is, if connected in a unity gain buffer configuration, the LM6211 will resist oscillation unless the capacitive load is higher than about 100 pF. For higher capacitive loads, the phase margin of the op amp reduces significantly and it tends to oscillate.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 The values for RS and CF are decided by ensuring that the zero attributed to CF lies at the same frequency as the pole attributed to CL. This ensures that the effect of the second pole on the transfer function is compensated for by the presence of the zero, and that the ROC is maintained at 20 dB/decade. For the circuit shown in Figure 36 the values of RS and CF are given by Equation 1.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com CF R2 R1 + VIN CIN + - + - VOUT Figure 38. Compensating for Input Capacitance This peaking can be eliminated by adding a feedback capacitance, CF, as shown in Figure 38. This introduces a zero in the feedback network, and hence a pole in the closed loop response, and thus maintains stability. An optimal value of CF is given by Equation 2. A simpler approach is to select CF = (R1/R2)CIN for a 90° phase margin.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 Certain performance characteristics are essential for an op amp if it is to be used in a PLL loop filter. Low input referred voltage and current noise are essential, as they directly affect the noise of the filter and hence the phase noise of the PLL.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 C27 100 pF 18 GND OSC_EN D0_RF OSC_OUT/FL0_IF OSC_IN 8 IF_PLL I/O's GND 13 12 5 4 VCC 13 14 15 C6 100 pF C41 0.1 PF C1 C2 C4 R3 + R2 LM6211 VS_PLL R46 100 k: C14 100 pF C8 0.01 PF C9 100 pF 10 V586ME04 11 LMX2430 L2 12 V 6 R50 10: 9 8 C5 100 pF VS_OP AMP RFOUT 7 14 VS_PLL C13 0.01 PF C11 100 pF + 15 C10 0.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 4.096V 3 VOUT 1 C1 6 SYNC 5 SCLK 4 DOUT 120 pF 2 +5V 4 5 1,2 6 B1 0.1 PF 1 PF 7,8 +5V 3 5 + 4 - 180: 1 A2 2 100 k: 0.2 PF 2.048V VREF 1 470 pF 2 8 7 SCLK 6 DOUT +IN C2 2.02 k: AV = 100 +5V 3 5 CS -IN 4 +5V 3 1 A1 4 + 470 pF 0.2 PF 100 k: 5 - 180: 2 PRESSURE SENSOR 0.2 mV/Volt/PSI A1, A2 = LM6211 B1 = LM4140ACM-2.0 C1 = DAC081S101 C2 = ADC121S625 Figure 42.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com AUDIO PREAMPLIFIER With low input referred voltage noise, low supply voltage and low supply current, and low harmonic distortion, the LM6211 is ideal for audio applications. Its wide unity gain bandwidth allows it to provide large gain over a wide frequency range and it can be used to design a preamplifier to drive a load of as low as 600Ω with less than 0.001% distortion. Two amplifier circuits are shown in Figure 44 and Figure 45.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 25 CF = 10 pF 20 15 CF = 1 nF GAIN (dB) 10 CF = 100 pF 5 0 -5 -10 -15 -20 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 46. Frequency Response of the Non-Inverting Preamplifier TRANSIMPEDANCE AMPLIFIER A transimpedance amplifier converts a small input current into a voltage. This current is usually generated by a photodiode.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com 20 VS = 5V CIN (pF) 15 10 VS = 24V 5 0 0 2 4 6 8 10 12 14 16 18 20 22 24 VCM (V) Figure 48. Input Common-Mode Capacitance vs. VCM An essential component for obtaining a maximally flat response is the feedback capacitor, CF. The capacitance seen at the input of the amplifier, CIN, combined with the feedback resistor, RF, generates a phase lag which causes gain-peaking and can destabilize the circuit.
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LM6211 www.ti.com SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 GAIN OP AMP OPEN LOOP GAIN fZ = NOISE GAIN WITH NO CF 1 2S RFCIN NOISE GAIN WITH CF A0 fP = 2S RF(CIN+CF) fP fZ A0 FREQUENCY Figure 50. Method for CF selection SENSOR INTERFACES The low input bias current and low input referred noise of the LM6211 make it ideal for sensor interfaces.
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LM6211 SNOSAH2C – FEBRUARY 2006 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 22 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) LM6211MF SOT-23 DBV 5 1000 178.0 8.4 LM6211MF/NOPB SOT-23 DBV 5 1000 178.0 LM6211MFX/NOPB SOT-23 DBV 5 3000 178.0 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.
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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) LM6211MF SOT-23 DBV 5 1000 210.0 185.0 35.0 LM6211MF/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LM6211MFX/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.
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