Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose VSSOP 10

-200 -100 0 100 200

PERCENTAGE (%)

OFFSET VOLTAGE (PV)

= 5V

= V

UNITS TESTED: 10,000

10 100 10k 100k

FREQUENCY (Hz)

100

VOLTAGE NOISE (nV/

Hz)

= 2.5V

= 5.5V

LMP7711

www.ti.com

SNOSAP4F –SEPTEMBER 2005–REVISED MAY 2013

Single and Dual Precision, 17 MHz, Low Noise, CMOS Input Amplifiers

Check for Samples: LMP7711

FEATURES

DESCRIPTION

The LMP7711/LMP7712 are single and dual low

• Unless Otherwise Noted, Typical Values at V

noise, low offset, CMOS input, rail-to-rail output

= 5V.

precision amplifiers with a high gain bandwidth

• Input Offset Voltage ±150 μV (Max)

product and an enable pin. The LMP7711/LMP7712

• Input Bias Current 100 fA

are part of the LMP™ precision amplifier family and

are ideal for a variety of instrumentation applications.

• Input Voltage Noise 5.8 nV/√Hz

Utilizing a CMOS input stage, the LMP7711/LMP7712

• Gain Bandwidth Product 17 MHz

achieve an input bias current of 100 fA, an input

• Supply Current (LMP7711) 1.15 mA

referred voltage noise of 5.8 nV/√Hz, and an input

• Supply Current (LMP7712) 1.30 mA

offset voltage of less than ±150 μV. These features

• Supply Voltage Range 1.8V to 5.5V

make the LMP7711/LMP7712 superior choices for

precision applications.

• THD+N @ f = 1 kHz 0.001%

Consuming only 1.15 mA of supply current, the

• Operating Temperature Range −40°C to 125°C

LMP7711 offers a high gain bandwidth product of 17

• Rail-to-rail Output Swing

MHz, enabling accurate amplification at high closed

• Space Saving SOT Package (LMP7711)

loop gains.

• 10-pin VSSOP Package (LMP7712)

The LMP7711/LMP7712 have a supply voltage range

of 1.8V to 5.5V, which makes these ideal choices for

APPLICATIONS

portable low power applications with low supply

voltage requirements. In order to reduce the already

• Active Filters and Buffers

low power consumption the LMP7711/LMP7712 have

• Sensor Interface Applications

an enable function. Once in shutdown, the

• Transimpedance Amplifiers

LMP7711/LMP7712 draw only 140 nA of supply

current.

The LMP7711/LMP7712 are built with TI's advanced

VIP50 process technology. The LMP7711 is offered

in a 6-pin SOT package and the LMP7712 is offered

in a 10-pin VSSOP.

TYPICAL PERFORMANCE

Offset Voltage Distribution Input Referred Voltage Noise

Figure 1. Figure 2.

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.

2LMP is a trademark of Texas Instruments.

3All other 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)

PAGE 1
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 Single and Dual Precision, 17 MHz, Low Noise, CMOS Input Amplifiers Check for Samples: LMP7711 FEATURES DESCRIPTION • The LMP7711/LMP7712 are single and dual low noise, low offset, CMOS input, rail-to-rail output precision amplifiers with a high gain bandwidth product and an enable pin. The LMP7711/LMP7712 are part of the LMP™ precision amplifier family and are ideal for a variety of instrumentation applications.
PAGE 2
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com 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 (3) Human Body Model 2000V Machine Model 200V Charge-Device Model 1000V VIN Differential ±0.3V Supply Voltage (VS = V+ – V−) 6.0V Voltage on Input/Output Pins V+ +0.3V, V− −0.
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LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 2.5V ELECTRICAL CHARACTERISTICS Unless otherwise noted, all limits are ensured for TA = 25°C, V+ = 2.5V, V− = 0V ,VO = VCM = V+/2, VEN = V+. Boldface limits apply at the temperature extremes. Symbol Parameter VOS Input Offset Voltage TC VOS Input Offset Voltage Temperature Drift (3) (4) LMP7711 Input Bias Current VCM = 1.0V (5) (4) IB Typ (2) Max (1) Units ±20 ±180 ±480 μV –1 ±4 μV/°C −40°C ≤ TA ≤ 85°C 0.
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LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com 2.5V ELECTRICAL CHARACTERISTICS (continued) Unless otherwise noted, all limits are ensured for TA = 25°C, V+ = 2.5V, V− = 0V ,VO = VCM = V+/2, VEN = V+. Boldface limits apply at the temperature extremes.
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LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 5V ELECTRICAL CHARACTERISTICS (continued) Unless otherwise noted, all limits are ensured for TA = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, VEN = V+. Boldface limits apply at the temperature extremes. Symbol AVOL VOUT Open Loop Voltage Gain Output Voltage Swing High Output Voltage Swing Low IOUT Output Current IS Supply Current SR Min (1) Typ (2) LMP7711, VO = 0.3 to 4.7V RL = 2 kΩ to V+/2 88 82 107 LMP7712, VO = 0.3 to 4.
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LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com CONNECTION DIAGRAM 6 1 + V OUTPUT 5 V - -IN A 2 +IN A - 3 1 4 V -IN +IN - EN A Figure 3. 6-Pin SOT - Top View See Package Number DDC 6 10 + V 9 OUT B 8 -IN B 4 7 +IN B 5 6 EN B - EN 2 + OUT A 3 + + - Figure 4.
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LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Offset Voltage Distribution PERCENTAGE (%) 20 TCVOS Distribution (LMP7711) 25 VS = 2.5V -40°C d TA d 125qC VS = 2.5V, 5V VCM = VS/2 UNITS TESTED:10,000 20 PERCENTAGE (%) 25 15 10 5 VCM = VS/2 UNITS TESTED: 10,000 15 10 5 0 -200 -100 0 100 0 200 -4 -3 -2 -1 0 TCVOS (PV/°C) OFFSET VOLTAGE (PV) Figure 5.
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LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Offset Voltage vs. VCM Offset Voltage vs. Supply Voltage 200 200 VS = 5V 150 100 -40°C 50 25°C OFFSET VOLTAGE (PV) OFFSET VOLTAGE (PV) 150 0 125°C -50 -100 100 -40°C 50 25°C 0 125°C -50 -100 -150 -150 -200 -0.3 -200 0.7 1.7 2.7 3.7 1.5 4.7 2.5 3.5 4.5 VS (V) VCM (V) Figure 11. CMRR vs.
PAGE 9
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Supply Current vs. Supply Voltage (LMP7711) Supply Current vs. Supply Voltage (LMP7712) 2 2 1.6 1.6 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 125°C 125°C 25°C 1.2 0.8 -40°C 0.4 25°C 1.2 -40°C 0.8 0.4 0 0 1.5 2.5 3.5 4.5 5.5 1.5 2.5 3.5 VS (V) Figure 17. 5.5 Figure 18. Supply Current vs.
PAGE 10
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Supply Current vs. Enable Pin Voltage (LMP7712) 1.7 VS = 2.5V 2.4 VS = 5V 125°C 25°C 1.3 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 1.5 Supply Current vs. Enable Pin Voltage (LMP7712) 125°C 1.1 0.9 -40°C 0.7 0.5 0.3 1.9 1.4 25°C 0.9 -40°C -40°C 25°C 0.4 125°C 0.1 -0.1 -0.1 0 0.5 1 1.5 2 2.
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LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Output Swing High vs. Supply Voltage Output Swing Low vs. Supply Voltage 50 50 40 30 25°C 125°C 20 -40°C 10 RL =10 k: 40 VOUT FROM RAIL (mV) VOUT FROM RAIL (mV) RL = 10 k: 30 -40°C 20 125°C 10 0 25°C 0 1.5 2.5 3.5 4.5 5.5 1.5 2.5 3.5 VS (V) 4.5 5.5 VS (V) Figure 29. Figure 30. Output Swing High vs.
PAGE 12
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Open Loop Frequency Response CL = 50 pF GAIN (dB) GAIN 40 CL = 100 pF 100 100 80 80 80 60 60 60 40 20 20 0 -20 CL = 50 pF -40 CL = 100 pF 10k 100k 1M 40 GAIN 20 20 0 0 -20 -20 -40 -40 -20 -40 RL = 600: 10 k: 10 M: -60 100M -60 1k 10M -60 10k 1M FREQUENCY (Hz) Figure 36.
PAGE 13
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Large Signal Step Response 10 mV/DIV 200 mV/DIV Small Signal Step Response VIN = 20 mVPP VIN = 1 VPP f = 1 MHz, AV = +1 f = 200 kHz, AV = +1 VS = 2.5V, CL = 10 pF VS = 2.5V, CL = 10 pF 800 ns/DIV Figure 41. Figure 42.
PAGE 14
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. THD+N vs. Frequency 0.006 THD+N vs. Frequency 0.006 VS = 1.8V VS = 5V VO = 0.9 VPP 0.005 AV = +2 0.004 THD+N (%) 0.004 THD+N (%) VO = 4 VPP 0.005 RL = 600: AV = +2 RL = 100 k: 0.003 RL = 600: 0.003 0.002 0.002 0.001 0.001 0 0 RL = 100 k: 10 100 1k 10k 10 100k 100 FREQUENCY (Hz) 1k 10k Figure 47.
PAGE 15
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise noted: TA = 25°C, VS = 5V, VCM = VS/2, VEN = V+. Closed Loop Output Impedance vs. Frequency OUTPUT IMPEDANCE (:) 100 10 1 0.1 0.01 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) Figure 53.
PAGE 16
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com APPLICATION NOTES LMP7711/LMP7712 The LMP7711/LMP7712 are single and dual, low noise, low offset, rail-to-rail output precision amplifiers with a wide gain bandwidth product of 17 MHz and low supply current. The wide bandwidth makes the LMP7711/LMP7712 ideal choices for wide-band amplification in portable applications.
PAGE 17
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 25 VS = 5V CCM (pF) 20 15 10 5 0 0 1 2 3 4 VCM (V) Figure 55. Input Common Mode Capacitance This input capacitance will interact with other impedances such as gain and feedback resistors, which are seen on the inputs of the amplifier to form a pole. This pole will have little or no effect on the output of the amplifier at low frequencies and under DC conditions, but will play a bigger role as the frequency increases.
PAGE 18
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com As shown in Equation 2, as the values of R1 and R2 are increased, the magnitude of the poles are reduced, which in turn decreases the bandwidth of the amplifier. Figure 57 shows the frequency response with different value resistors for R1 and R2. Whenever possible, it is best to chose smaller feedback resistors.
PAGE 19
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 With a wide gain bandwidth product, low input bias current and low input voltage and current noise, the LMP7711/LMP7712 are ideal for wideband transimpedance applications. CF RF IIN CCM + + VOUT CD - VB CIN = CD + CCM VOUT = - RF IIN Figure 59. Transimpedance Amplifier A feedback capacitance CF is usually added in parallel with RF to maintain circuit stability and to control the frequency response.
PAGE 20
LMP7711 SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 www.ti.com THERMOPILE + + - VIN = KI IR RADIATION INTENSITY, I + RB - VOUT RA CF VOUT RA I= K(RA + RB) Figure 61. Thermopile Sensor Interface PRECISION RECTIFIER Rectifiers are electrical circuits used for converting AC signals to DC signals. Figure 62 shows a full-wave precision rectifier. Each operational amplifier used in this circuit has a diode on its output.
PAGE 21
LMP7711 www.ti.com SNOSAP4F – SEPTEMBER 2005 – REVISED MAY 2013 REVISION HISTORY Changes from Revision E (May 2013) to Revision F • Page Changed layout of National Data Sheet to TI format. .........................................................................................................
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