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LMP7721MA/NOPB

General Purpose Amplifier 1 Circuit Rail-to-Rail 8-SOIC

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LMP7721MA/NOPB
Datasheet:

LMP7721MA/NOPB Datasheet (PDF)
Number of channels:

1
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V):

5.5
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V):

1.8
Vos (offset voltage at 25°C) (max) (mV):

0.15
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LMP7721MA/NOPB General Description

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 interface circuits.

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.

Key Features

Unless Otherwise Noted, Typical Values at T_A =
25°C, V_S = 5 V.
Input Bias Current (V_CM = 1 V)
- Maximum at 25°C ±20 fA
- Maximum at 85°C ±900 fA
Offset Voltage ±26 µV
Offset Voltage Drift – 1.5 µV/°C
DC Open-Loop Gain 120 dB
DC CMRR 100 dB
Input Voltage Noise (at f = 1 kHz) 6.5 nV/√Hz
THD 0.0007%
Supply Current 1.3 mA
GBW 17 MHz
Slew Rate (Falling Edge) 12.76 V/µs
Supply Voltage 1.8 V to 5.5 V
Operating Temperature Range –40°C to 125°C
8-Pin SOIC

Specifications

Number of channels	1	Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.5
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	1.8	Vos (offset voltage at 25°C) (max) (mV)	0.15
GBW (typ) (MHz)	17	Slew rate (typ) (V/µs)	10.43
Rail-to-rail	In to V-, Out	Offset drift (typ) (µV/°C)	1.5
Iq per channel (typ) (mA)	1.3	Vn at 1 kHz (typ) (nV√Hz)	6.5
CMRR (typ) (dB)	100	Rating	Catalog
Operating temperature range (°C)	-40 to 125	Input bias current (max) (pA)	0.02
Iout (typ) (A)	0.022	Architecture	CMOS
Input common mode headroom (to negative supply) (typ) (V)	-0.3	Input common mode headroom (to positive supply) (typ) (V)	-1
Output swing headroom (to negative supply) (typ) (V)	0.02	Output swing headroom (to positive supply) (typ) (V)	-0.02
THD + N at 1 kHz (typ) (%)	0.0007	Pin Count	8
Released Date	Apr 13, 2015	Last Modified Date	Mar 7, 2023 4:10 PM UTC