Datasheet

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

0.1

1 10 1k 10k

FREQUENCY (Hz)

100

VOLTAGE NOISE (nV/

Hz)

= 2.5V, 3.3V, 5V

= 0.5V

= 2.5V

0.1

1 10 1k 10k

FREQUENCY (Hz)

100

CURRENT NOISE (pA/

Hz)

= 2.5V, 3.3V, 5V

= 0.5V

= 2.5V

LMP7732

www.ti.com

SNOSAZ0E –AUGUST 2007–REVISED MARCH 2013

2.9 nV/sqrt(Hz) Low Noise, RRIO Amplifier

Check for Samples: LMP7732

FEATURES

DESCRIPTION

The LMP7732 is a dual low noise, rail-to-rail input

• (Typical Values, T

= 25°C, V

= 5V)

and output, low voltage amplifier. The LMP7732 is

• Input Voltage Noise

part of the LMP™ amplifier family and is ideal for

– f = 3 Hz 3.3 nV/√Hz

precision and low noise applications with low voltage

requirements.

– f = 1 kHz 2.9 nV/√Hz

• CMRR 130 dB

This operational amplifier offers low voltage noise of

2.9 nV/√Hz with a 1/f corner of only 3 Hz. The

• Open Loop Gain 130 dB

LMP7732 has bipolar junction input stages with a

• GBW 22 MHz

bias current of only 1.5 nA. This low input bias

• Slew Rate 2.4 V/µs

current, complemented by the very low level of

voltage noise, makes the LMP7732 an excellent

• THD 0.001% @ f = 10 kHz, AV = 1, RL = 2 kΩ

choice for photometry applications.

• Supply Current 4.4 mA

The LMP7732 provides a wide GBW of 22 MHz while

• Supply Voltage Range 1.8V to 5.5V

consuming only 4 mA of current. This high gain

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

bandwidth along with the high open loop gain of 130

• Input Bias Current ±1.5 nA

dB enables accurate signal conditioning in

applications with high closed loop gain requirements.

• RRIO

The LMP7732 has a supply voltage range of 1.8V to

APPLICATIONS

5.5V, making it an ideal choice for battery operated

portable applications.

• Gas Analysis Instruments

The LMP7732 is offered in the 8-Pin SOIC and

• Photometric Instrumentation

VSSOP packages.

• Medical Instrumentation

The LMP7731 is the single version of this product

and is offered in the 5-Pin SOT-23 and 8-Pin SOIC

packages.

Typical Performance Characteristics

Input Voltage Noise vs. Frequency Input Current Noise vs. Frequency

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 (26 pages)

PAGE 1
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 2.9 nV/sqrt(Hz) Low Noise, RRIO Amplifier Check for Samples: LMP7732 FEATURES DESCRIPTION • • The LMP7732 is a dual low noise, rail-to-rail input and output, low voltage amplifier. The LMP7732 is part of the LMP™ amplifier family and is ideal for precision and low noise applications with low voltage requirements. 1 23 • • • • • • • • • • (Typical Values, TA = 25°C, VS = 5V) Input Voltage Noise – f = 3 Hz 3.3 nV/√Hz – f = 1 kHz 2.
PAGE 2
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 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) Human Body Model ESD Tolerance (3) For inputs pins only 2000V For all other pins 2000V Machine Model 200V Charge Device Model 1000V VIN Differential ±2V Supply Voltage (VS = V+ – V−) 6.
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LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 2.5V Electrical Characteristics (1) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 2.5V, V− = 0V, VCM = V+/2, RL >10 kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Typ (3) Max (2) VCM = 2.0V ±9 ±500 ±600 VCM = 0.5V ±9 ±500 ±600 VCM = 2.0V ±0.5 ±5.5 VCM = 0.5V ±0.2 ±5.5 VCM = 2.0V ±1 ±30 ±45 VCM = 0.5V ±12 ±50 ±75 VCM = 2.0V ±1 ±50 ±75 VCM = 0.
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LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com 2.5V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 2.5V, V− = 0V, VCM = V+/2, RL >10 kΩ to V+/2. Boldface limits apply at the temperature extremes.
PAGE 5
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 3.3V Electrical Characteristics (1) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 3.3V, V− = 0V, VCM = V+/2, RL > 10 kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Typ (3) Max (2) VCM = 2.5V ±6 ±500 ±600 VCM = 0.5V ±6 ±500 ±600 VCM = 2.5V ±0.5 ±5.5 VCM = 0.5V ±0.2 ±5.5 VCM = 2.5V ±1.5 ±30 ±45 VCM = 0.5V ±13 ±50 ±77 VCM = 2.5V ±1 ±50 ±70 VCM = 0.
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LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com 3.3V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 3.3V, V− = 0V, VCM = V+/2, RL > 10 kΩ to V+/2. Boldface limits apply at the temperature extremes.
PAGE 7
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 5V Electrical Characteristics(1) (continued) Unless otherwise specified, all limits are ensured for TA = 25°C, V+ = 5V, V− = 0V, VCM = V+/2, RL > 10 kΩ to V+/2. Boldface limits apply at the temperature extremes.
PAGE 8
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Offset Voltage Distribution 10 9 TCVOS Distribution 25 VS = 2.5V VS = 2.5V, 3.3V VCM = 0.5V VCM = 0.5V 20 PERCENTAGE (%) PERCENTAGE (%) 8 7 6 5 4 3 15 10 5 2 1 0 -40 -30 -20 -10 0 10 20 30 0 -0.5 40 0 VOS (PV) Figure 2. Offset Voltage Distribution 1.5 TCVOS Distribution 25 VS = 3.3V, 5V VS = 5V VCM = 0.5V VCM = 0.
PAGE 9
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Offset Voltage Distribution TCVOS Distribution 14 8 VS = 3.3V, 5V VS = 3.3V 7 12 VCM = 2.5V, 4.5V VCM = 2.5V 10 PERCENTAGE (%) PERCENTAGE (%) 6 5 4 3 8 6 4 2 2 1 0 -40 -30 -20 -10 0 10 20 30 0 -0.5 40 0 Figure 8. Figure 9. Offset Voltage vs. Temperature 1.5 Offset Voltage vs. Temperature 100 VS = 2.5V, 3.
PAGE 10
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Offset Voltage vs. Supply Voltage Offset Voltage vs. VCM 5 100 VS = 2.5V 50 -5 VOS (PV) OFFSET VOLTAGE (PV) 75 25°C 0 -40°C -10 125°C 25 85°C 25°C 0 -15 -40°C -25 85°C -20 -50 -25 1.5 125°C 2 2.5 3 3.5 4 4.5 5 -75 5.5 0 0.5 1 SUPPLY VOLTAGE (V) Figure 14. Offset Voltage vs. VCM Offset Voltage vs.
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LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Time Domain Voltage Noise Time Domain Voltage Noise Figure 20. Figure 21. Time Domain Voltage Noise Output Voltage vs. Output Current 1000 VS = 2.5V, 3.3V, 5V VOUT FROM RAIL (mV) 800 VS = 2.5V 600 400 SINK 200 0 -200 -400 SOURCE -600 -800 0 5 10 15 20 25 30 OUTPUT CURRENT (mA) Figure 22. Figure 23.
PAGE 12
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Input Bias Current vs. VCM Open Loop Frequency Response Over Temperature 100 100 INPUT BIAS CURRENT (nA) 225 VS = 5V 125°C 80 GAIN 80 180 60 60 20 GAIN (dB) 25°C 0 -20 -40 PHASE 20 45 VS = 2.5V, TA = 25°C -40°C 0 0 VS = 2.5V, 3.3V, 5V -20 RL = 10 k: TA = -40°C, 25°C, 85°C, 125°C -40 1M 10M 100k 1k 10k -80 0 0.5 1 1.
PAGE 13
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Small Signal Step Response 20 mV/DIV 500 mV/DIV Large Signal Step Response VS = 5V VIN = 2 VPP f = 10 kHz VS = 5V VIN = 100 mVPP f = 10 kHz AV = +1 AV = +1 RL = 10 k: RL = 10 k: CL = 10 pF CL = 10 pF Figure 32. Figure 33.
PAGE 14
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise noted: TA = 25°C, RL > 10 kΩ, VCM = VS/2. Output Swing Low vs. Supply Voltage Sinking Current vs, Supply Voltage 60 40 -40°C RL = 2 k: 25°C 50 125°C 30 25 ISINK (mA) VOUT FROM RAIL (mV) 35 85°C 20 15 85°C 40 125°C 30 -40°C 25°C 10 20 5 0 1.5 2 2.5 3 3.5 4 4.5 5 10 1.5 5.5 2 2.5 3 3.5 4 4.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Figure 38.
PAGE 15
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 APPLICATION NOTES LMP7732 The LMP7732 is a dual low noise, rail-to-rail input and output, low voltage amplifier. The low input voltage noise of only 2.9 nV/√Hz with a 1/f corner at 3 Hz makes the LMP7732 ideal for sensor applications where DC accuracy is of importance. The LMP7732 has high gain bandwidth of 22 MHz.
PAGE 16
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com INPUT VOLTAGE NOISE MEASUREMENT The LMP7732 has very low input voltage noise. The peak-to-peak input voltage noise of the LMP7732 can be measured using the test circuit shown in Figure 42. 0.1 PF 100 k: - ½ LMP7732 10: + VOLTAGE GAIN = 50,000 2 k: 4.7 PF + ½ LMP7732 - 100 k: 4.3 k: 22 PF 2.2 PF 110 k: SCOPE x1 RIN = 1M 24.3 k: 0.1 PF Figure 42. 0.
PAGE 17
LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 OFFSET VOLTAGE DRIFT (PV) 5.0 4.0 3.0 2.0 VS = 5V 1.0 RL = 2 k: 5 TYPICAL UNITS 0.0 0 50 100 150 200 250 300 TIME (s) Figure 44. Start-Up Input Offset Voltage Drift During the peak-to-peak noise measurement, the LMP7732 must be shielded. This prevents offset variations due to airflow.
PAGE 18
LMP7732 SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 www.ti.com FEEDBACK NETWORK (a) ADC V+ SENSOR INPUT NETWORK V- (b) FEEDBACK NETWORK V+ ADC RISO SENSOR INPUT NETWORK V- C Figure 46.
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LMP7732 www.ti.com SNOSAZ0E – AUGUST 2007 – REVISED MARCH 2013 REVISION HISTORY Changes from Revision D (March 2013) to Revision E • 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 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PAGE 22
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-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 LMP7732MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMP7732MM/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LMP7732MME/NOPB VSSOP DGK 8 250 178.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMP7732MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMP7732MM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LMP7732MME/NOPB VSSOP DGK 8 250 210.0 185.0 35.0 LMP7732MMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.