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LMP7721 Datasheet(PDF) 1 Page - Texas Instruments |
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LMP7721 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page 0 1 2 3 3.5 -20 -15 -10 -5 0 5 VCM (V) V + = 5V V - = 0V TA = 25°C 1.5 0.5 2.5 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMP7721 SNOSAW6E – JANUARY 2008 – REVISED DECEMBER 2014 LMP7721 3-Femtoampere Input Bias Current Precision Amplifier 1 Features 3 Description The LMP7721 is the industry’s lowest specified input 1 • Unless Otherwise Noted, Typical Values at TA = bias current precision amplifier. The ultra-low input 25°C, VS = 5 V. bias current is 3 fA, with a specified limit of ±20 fA at • Input Bias Current (VCM = 1 V) 25°C and ±900 fA at 85°C. This is achieved with the – Maximum at 25°C ±20 fA latest patent-pending technology of input bias current cancellation amplifier circuitry. This technology also – Maximum at 85°C ±900 fA maintains the ultra-low input bias current over the • Offset Voltage ±26 µV entire input common-mode voltage range of the • Offset Voltage Drift −1.5 μV/°C amplifier. • DC Open-Loop Gain 120 dB Other outstanding features, such as low voltage noise • DC CMRR 100 dB (6.5 nV/ √Hz), low DC-offset voltage (±150 µV maximum at 25°C) and low-offset voltage • Input Voltage Noise (at f = 1 kHz) 6.5 nV/ √Hz temperature coefficient ( −1.5 µV/°C), improve system • THD 0.0007% sensitivity and accuracy in high-precision • Supply Current 1.3 mA applications. With a supply voltage range of 1.8 V to 5.5 V, the LMP7721 is the ideal choice for battery- • GBW 17 MHz operated, portable applications. The LMP7721 is part • Slew Rate (Falling Edge) 12.76 V/ μs of the LMP™ precision amplifier family. • Supply Voltage 1.8 V to 5.5 V As part of Texas Instruments' PowerWise™ products, • Operating Temperature Range −40°C to 125°C the LMP7721 provides the remarkably wide-gain • 8-Pin SOIC bandwidth product (GBW) of 17 MHz while consuming only 1.3 mA of current. This wide GBW 2 Applications along with the high open-loop gain of 120 dB enables accurate signal conditioning. With these • Photodiode Amplifier specifications, the LMP7721 has the performance to • High Impedance Sensor Amplifier excel in a wide variety of applications such as • Ion Chamber Amplifier electrochemical cell amplifiers and sensor interface circuits. • Electrometer Amplifier • pH Electrode Amplifier The LMP7721 is offered in an 8-pin SOIC package with a special pinout that isolates the amplifier’s input • Transimpedance Amplifier from the power supply and output pins. With proper board layout techniques, the unique pinout of the Ultra-Low Input Bias Current LMP7721 will prevent PCB leakage current from reaching the input pins. Thus system error will be further reduced. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LMP7721 SOIC (8) 4.90 mm × 3.90 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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