Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SC 70 5

10 M:

OUT

10 M:

270 pF 270 pF

270 pF

CR2032 Coin Cell

225 mAh = 5 circuits @ 9.5 yrs.

60 Hz Twin T Notch Filter

= 2 V/V

10 M:

270 pF

BATT

= 3V o2V @ end of life

Remote Sensor

Signal

60 Hz

To ADC

Signal × 2

(No 60 Hz)

LPV521

www.ti.com

SNOSB14C –AUGUST 2009–REVISED FEBRUARY 2013

LPV521 Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier

Check for Samples: LPV521

FEATURES

DESCRIPTION

The LPV521 is a single nanopower 552 nW amplifier

• For V

= 5V, Typical Unless Otherwise Noted

designed for ultra long life battery applications. The

– Supply Current at V

= 0.3V 400 nA (Max)

operating voltage range of 1.6V to 5.5V coupled with

– Operating Voltage Range 1.6V to 5.5V

typically 351 nA of supply current make it well suited

for RFID readers and remote sensor nanopower

– Low TCV

3.5 µV/°C (max)

applications. The device has input common mode

– V

1 mV (Max)

voltage 0.1V over the rails, guaranteed TCV

and

– Input Bias Current 40 fA

voltage swing to the rail output performance. The

LPV521 has a carefully designed CMOS input stage

– PSRR 109 dB

that outperforms competitors with typically 40 fA I

BIAS

– CMRR 102 dB

currents. This low input current significantly reduces

– Open Loop Gain 132 dB

BIAS

and I

errors introduced in megohm resistance,

high impedance photodiode, and charge sense

– Gain Bandwidth Product 6.2 kHz

situations. The LPV521 is a member of the

– Slew Rate 2.4 V/ms

PowerWise

family and has an exceptional power-to-

– Input Voltage Noise at f = 100 Hz 255

performance ratio.

nV/√Hz

The wide input common mode voltage range,

– Temperature Range −40°C to 125°C

guaranteed 1 mV V

and 3.5 µV/°C TCV

enables

accurate and stable measurement for both high side

APPLICATIONS

and low side current sensing.

• Wireless Remote Sensors

EMI protection was designed into the device to

• Powerline Monitoring

reduce sensitivity to unwanted RF signals from cell

phones or other RFID readers.

• Power Meters

• Battery Powered Industrial Sensors The LPV521 is offered in the 5-pin SC70 package.

• Micropower Oxygen sensor and Gas Sensor

• Active RFID Readers

• Zigbee Based Sensors for HVAC Control

• Sensor Network Powered by Energy

Scavenging

Typical Application

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.

2PowerWise is a registered 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 (29 pages)

PAGE 1
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 LPV521 Nanopower, 1.8V, RRIO, CMOS Input, Operational Amplifier Check for Samples: LPV521 FEATURES DESCRIPTION • The LPV521 is a single nanopower 552 nW amplifier designed for ultra long life battery applications. The operating voltage range of 1.6V to 5.5V coupled with typically 351 nA of supply current make it well suited for RFID readers and remote sensor nanopower applications. The device has input common mode voltage 0.
PAGE 2
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 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 Machine Model Charge-Device Model Any pin relative to V- 6V, −0.
PAGE 3
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 1.8V DC Electrical Characteristics (1) Unless otherwise specified, all limits guaranteed for TA = 25°C, V+ = 1.8V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes. Symbol VOS Parameter Input Offset Voltage Conditions Min (2) VCM = 0.3V VCM = 1.5V Typ Max 0.1 ±1.0 ±1.23 0.1 ±1.0 ±1.23 (3) (2) Units mV TCVOS Input Offset Voltage Drift (4) ±0.4 ±3 μV/°C IBIAS Input Bias Current 0.
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LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com 1.8V AC Electrical Characteristics (1) Unless otherwise specified, all limits guaranteed for TA = 25°C, V+ = 1.8V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (2) Typ (3) GBW Gain-Bandwidth Product CL = 20 pF, RL = 100 kΩ 6.1 SR Slew Rate AV = +1, VIN = 0V to 1.8V Falling Edge 2.9 Rising Edge 2.
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LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 3.3V DC Electrical Characteristics(1) (continued) Unless otherwise specified, all limits guaranteed for TA = 25°C, V+ = 3.3V, V− = 0V, VCM = VO = V+/2, and RL > 1 MΩ. Boldface limits apply at the temperature extremes.
PAGE 6
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com 5V DC Electrical Characteristics(1) (continued) Unless otherwise specified, all limits guaranteed for TA = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and RL > 1MΩ. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min (2) Typ Max Units (3) (2) TCVOS Input Offset Voltage Drift (4) ±0.4 ±3.5 μV/°C IBIAS Input Bias Current 0.
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LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 5V AC Electrical Characteristics(1) (continued) Unless otherwise specified, all limits guaranteed for TA = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and RL > 1MΩ. Boldface limits apply at the temperature extremes. Symbol en Parameter Conditions Min (2) Typ (3) Max (2) Units Input-Referred Voltage Noise Density f = 100 Hz 255 Input-Referred Voltage Noise 0.
PAGE 8
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics At TJ = 25°C, unless otherwise specified. Supply Current vs. Supply Voltage Supply Current vs. Supply Voltage 800 700 600 500 400 300 200 100 0 125°C 85°C 25°C VCM = 0.3V -40°C 1 2 3 4 800 700 600 500 400 300 200 100 0 SUPPLY CURRENT (nA) SUPPLY CURRENT (nA) 125°C 5 6 85°C 25°C -40°C VCM = VS ± 0.3V 1 2 SUPPLY VOLTAGE (V) 3 4 Figure 2.
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LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Offset Voltage Distribution TCVOS Distribution 30 25 VS = 5V VS = 5V VCM = VS/2 15 10 PERCENTAGE (%) PERCENTAGE (%) 20 15 10 5 0 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 VOS (mV) TCVOS (PV/C) Figure 8. Figure 9. Input Offset Voltage vs. Input Common Mode Input Offset Voltage vs.
PAGE 10
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Input Offset Voltage vs. Supply Voltage -40°C VCM = VS - 0.3V 150 100 50 50 VOS (éV) 100 0 85°C -50 25°C 0 -50 85°C 125°C -100 VS = 1.8V 150 -40°C 25°C VOS (éV) Input Offset Voltage vs. Output Voltage -100 -150 -150 125°C 1 2 3 4 5 0.0 6 0.5 VS (V) 2.0 VOUT (V) Figure 15. Input Offset Voltage vs.
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LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Input Offset Voltage vs. Sourcing Current VS = 5V -40°C 150 Input Offset Voltage vs. Sinking Current 100 VS = 1.8V -40°C 150 100 25°C VOS (éV) VOS (éV) 25°C 50 0 -50 -100 50 0 -50 85°C -100 85°C -150 -150 125°C 125°C 0.0 0.5 1.0 1.5 2.0 0.0 0.5 ISOURCE (mA) 1.5 2.0 Figure 20. Figure 21. Input Offset Voltage vs.
PAGE 12
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Sourcing Current vs. Output Voltage Sinking Current vs. Output Voltage 16 16 VS = 3.3V 12 25°C ISINK (mA) ISOURCE (mA) 12 8 85°C 4 25°C 8 85°C 4 125°C 125°C 0 0.0 0.5 1.0 1.5 -40°C VS = 3.3V -40°C 2.0 2.5 3.0 0 0.0 3.5 0.5 1.0 1.5 2.5 3.0 3.5 OUTPUT VOLTAGE REFERENCED TO V (V) OUTPUT VOLTAGE REFERENCED TO V (V) Figure 26.
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LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Output Swing High vs. Supply Voltage Output Swing Low vs. Supply Voltage 5 125°C 4 VOUT FROM RAIL (mV) VOUT FROM RAIL (mV) 5 RL = 100 k: 85°C 3 2 25°C 1 RL = 100 k: 125°C 4 85°C 3 -40°C 0 1 -40°C 3 2 2 4 5 25°C 6 1 2 3 4 5 Figure 32. Figure 33. Input Bias Current vs. Common Mode Voltage Input Bias Current vs.
PAGE 14
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Input Bias Current vs. Common Mode Voltage Input Bias Current vs. Common Mode Voltage 400 30 VS = 5V VS = 5V 25 300 20 200 15 IBIAS (pA) IBIAS (fA) 25°C 100 0 125°C 10 5 0 -5 -100 85°C -40°C -10 -200 -15 -300 0 1 2 3 4 -20 0 5 1 2 3 4 VCM (V) VCM (V) Figure 38. Figure 39. PSRR vs. Frequency 5 CMRR vs.
PAGE 15
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. VS = 5V 130 110 90 70 25°C 50 30 10 -40°C -10 -30 125°C 0 GAIN (dB) 85°C GAIN 40 PHASE (°) GAIN (dB) 40 20 GAIN 0 -20 1k 10k 100k 100 1k Figure 45. Frequency Response vs. RL Frequency Response vs. RL VS = 3.3V RL = 100 k: 0 40 GAIN (dB) GAIN 20 GAIN 0 RL = 10 k: 100 10k 100k 100 1k FREQUENCY (Hz) Figure 47.
PAGE 16
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Frequency Response vs. CL VS = 5V 60 GAIN CL = 200 pF 0 SLEW RATE (V/ms) CL = 100 pF PHASE (°) 130 110 CL = 20 pF 90 70 50 30 10 -10 -30 40 20 3.3 RL = 10 M: CL = 50 pF PHASE GAIN (dB) Slew Rate vs. Supply Voltage FALLING EDGE 3.0 2.7 2.4 RISING EDGE 2.1 AV = +1 1.8 -20 VOUT = VS 100 1k 10k 100k 1.5 FREQUENCY (Hz) 2.3 3.
PAGE 17
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Typical Performance Characteristics (continued) At TJ = 25°C, unless otherwise specified. Small Signal Pulse Response Small Signal Pulse Response INPUT 50 mV/DIV 50 mV/DIV INPUT OUTPUT OUTPUT VS = 5V VS = 1.8V RL = 100 k: RL = 100 k: 200 Ps/DIV 200 Ps/DIV Figure 56. Figure 57. Large Signal Pulse Response Large Signal Pulse Response INPUT 500 mV/DIV 500 mV/DIV INPUT OUTPUT OUTPUT VS = 5V VS = 1.
PAGE 18
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com APPLICATION INFORMATION The LPV521 is fabricated with Texas Instruments' state-of-the-art VIP50 process. This proprietary process dramatically improves the performance of Texas Instruments' low-power and low-voltage operational amplifiers. The following sections showcase the advantages of the VIP50 process and highlight circuits which enable ultralow power consumption.
PAGE 19
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 VBATT = 3V o 2V @ end of life CR2032 Coin Cell 225 mAh = 5 circuits @ 9.5 yrs. each 10 M: 10 M: VBATT 10 M: VOUT 10 M: + VIN 270 pF 270 pF 10 M: 10 M: 270 pF 60 Hz Twin T Notch Filter AV = 2 V/V 270 pF Figure 62. 60 Hz Notch Filter Figure 63.
PAGE 20
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com ICHARGE RSENSE + V R2 24.9 k: - + + R1 24.9 k: Q1 2N2907 RSENSE X R3 VOUT = R1 - V + 10: LOAD X ICHARGE VOUT R3 10 M: Figure 64. High Side Current Sensing PORTABLE GAS DETECTION SENSOR Gas sensors are used in many different industrial and medical applications. They generate a current which is proportional to the percentage of a particular gas sensed in an air sample.
PAGE 21
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 100 M: V 1 M: + VOUT + - V RL OXYGEN SENSOR Figure 65. Precision Oxygen Sensor INPUT STAGE The LPV521 has a rail-to-rail input which provides more flexibility for the system designer. Rail-to-rail input is achieved by using in parallel, one PMOS differential pair and one NMOS differential pair. When the common mode input voltage (VCM) is near V+, the NMOS pair is on and the PMOS pair is off.
PAGE 22
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com RISO - VOUT VIN + CL Figure 66. Resistive Isolation of Capacitive Load Recommended minimum values for RISO are given in the following table, for 5V supply. Figure 67 shows the typical response obtained with the CL = 50 pF and RISO = 154 kΩ. The other values of RISO in the table were chosen to achieve similar dampening at their respective capacitive loads.
PAGE 23
LPV521 www.ti.com SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 Twisted pair cabling and the active front-end’s common-mode rejection provide immunity against low frequency noise (i.e. 60 Hz or 50 Hz mains) but are ineffective against RF interference. Even a few centimeters of PCB trace and wiring for sensors located close to the amplifier can pick up significant 1 GHz RF.
PAGE 24
LPV521 SNOSB14C – AUGUST 2009 – REVISED FEBRUARY 2013 www.ti.com REVISION HISTORY Changes from Revision B (February 2013) to Revision C • 24 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LPV521MG/NOPB SC70 DCK 5 LPV521MGE/NOPB SC70 DCK LPV521MGX/NOPB SC70 DCK SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 250 178.0 8.4 2.25 2.45 1.2 4.0 8.0 Q3 5 3000 178.0 8.4 2.25 2.45 1.2 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LPV521MG/NOPB SC70 DCK 5 1000 210.0 185.0 35.0 LPV521MGE/NOPB SC70 DCK 5 250 210.0 185.0 35.0 LPV521MGX/NOPB SC70 DCK 5 3000 210.0 185.0 35.
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