peculiarity
Unless otherwise noted, typical values are in T
A
= 25 ° C，
V
S
= 5V。
-
Input bias current (V
CM
= 1V）
|
Maximum @ 25°C
|
± 20 FA
|
|
85 °C max
|
± 900 FA
|
|
Offset voltage
|
± 26μV
|
|
Offset voltage drift
|
-1.5μV/ ° C
|
|
DC open-loop gain
|
120 dB
|
|
DC CMRR
|
100 dB
|
|
Input voltage noise (F = 1 kHz)
|
6.5 NV /
√
hertz
|
|
Total harmonic distortion
|
0.0007％
|
|
Supply current
|
1.3 mA
|
|
GBW
|
17 MHz
|
|
Slew rate (falling edge)
|
12.76 V/μs
|
|
Supply voltage
|
1.8V to 5.5V
|
|
Operating temperature range
|
-40°C to 125°C
|
|
8-pin SOIC
|
illustrate
The LMP7721 is the industry's lowest guaranteed input bias current precision amplifier.
The ultra-low input bias current is 3 rounds, guaranteed to limit ± 20 FA to 25 ° C and ± 900 FA to 85 ° C.
This is the latest patent-pending implementation of input bias current cancellation amplifier circuit technology.
This technique also maintains ultra-low input bias current over the entire input common-mode voltage range amplifier.
Other outstanding features such as low voltage noise (6.5 NV /
), low DC offset voltage (± 150μV max. 25°C) and low offset voltage temperature coefficient (-1.5μV/°C), improve the sensitivity, high precision, applicability and accuracy of the system.
With a supply voltage range of 1.8V to 5.5V, the LMP7721 is ideal for battery-powered portable applications.
The LMP7721 is part of the LMP family of high precision amplifiers.
As part of National Semiconductor's PowerWise offering, LMP7721 offers a significant wide gain bandwidth (GBW) of 17 MHz while consuming only 1.3 mA of current.
This 120 dB high open-loop gain GBW enables accurate signal conditioning.
With these specifications, the LMP7721 to Excel in electrochemical cell amplifiers and sensor interface circuits and other applications performance.
LMP7721 is a special pin-isolated power amplifier with input and output pins available in an 8-pin SOIC package.
With the right board layout technology, the unique LMP7721 pinout prevents leakage current from reaching the input pins on the PCB.
Therefore, system errors will be further reduced.
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