The LMP7721 is the industrys lowest specified input bias current precision amplifier.
The ultra-low input bias current is 3 fA, with a specified limit of ±20 fA at 25°C and ±900 fA at
85°C. This is achieved with the latest patent-pending technology of input bias current cancellation
amplifier circuitry. This technology also maintains the ultra-low input bias current over the
entire input common-mode voltage range of the amplifier.
Other outstanding features, such as low voltage noise (6.5
nV/√Hz), low DC-offset voltage (±150 µV maximum at 25°C) and low-offset
voltage temperature coefficient (1.5 µV/°C), improve system sensitivity and accuracy in
high-precision applications. With a supply voltage range of 1.8 V to 5.5 V, the LMP7721 is the
ideal choice for battery-operated, portable applications. The LMP7721 is part of the
LMP precision amplifier family.
As part of Texas Instruments PowerWise™
products, the LMP7721 provides the remarkably wide-gain bandwidth product (GBW) of 17 MHz while
consuming only 1.3 mA of current. This wide GBW along with the high open-loop gain of 120 dB
enables accurate signal conditioning. With these specifications, the LMP7721 has the performance to
excel in a wide variety of applications such as electrochemical cell amplifiers and sensor
The LMP7721 is offered in an 8-pin SOIC package with a special pinout that isolates the
amplifiers input from the power supply and output pins. With proper board layout techniques, the
unique pinout of the LMP7721 will prevent PCB leakage current from reaching the input pins. Thus
system error will be further reduced.