National Semiconductor LMX7701 Technical data

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LMP7701
Precision, CMOS Input, RRIO, Wide Supply Range
Amplifier

LMP7701 Precision, CMOS Input, RRIO, Wide Supply Range Amplifier

PRELIMINARY

September 2005

General Description

The LMP7701 is a single, low offset voltage, rail-to-rail input
and output precision amplifier with a CMOS input stage and
a wide supply voltage range. The LMP7701 is part of the

™

precision amplifier family and is ideal for sensor

LMP
interface and other instrumentation applications.

±

The guaranteed low offset voltage of less than
along with the guaranteed low input bias current of less than

±

10 pA make the LMP7701 ideal for precision applications.
The LMP7701 is built utilizing VIP50 technology, which al­lows the combination of a CMOS input stage and a 12V
common mode and supply voltage range. This makes the
LMP7701 a great choice in many applications where con­ventional CMOS parts cannot operate under the desired
voltage conditions.

The LMP7701 has a rail-to-rail input stage that significantly
reduces the CMRR glitch commonly associated with rail-to­rail input amplifiers. This is achieved by trimming both sides
of the complimentary input stage, thereby reducing the dif­ference between the NMOS and PMOS offsets. The output
of the LMP7701 swings within 40 mV of either rail to maxi­mize the signal dynamic range in applications requiring low
supply voltage.

The LMP7701 is offered in space saving SOT23-5. This
small package is an ideal solution for area constrained PC
boards and portable electronics.

200 µV

Features

Unless otherwise noted, typical values at VS=5V

n Input offset voltage
n Input bias current 300 fA
n Input voltage noise 12 nV/
n CMRR 100 dB
n Open loop gain 130 dB
n Temperature range –40˚C to 125˚C
n Unity gain bandwidth 2.5 MHz
n Supply current 715 µA
n Supply Voltage Range 2.7V to 12V
n Rail-to-rail input and output

±

200 µV (max)

Applications

n High impedance sensor interface
n Battery powered instrumentation
n High gain amplifiers
n DAC buffer
n Instrumentation amplifier
n Active filters

Typical Application

Precision Current Source

LMP™is a trademark of National Semiconductor Corporation.

© 2005 National Semiconductor Corporation DS201273 www.national.com

20127305

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

LMP7701

please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

ESD Tolerance (Note 2)

Junction Temperature (Note 3) +150˚C

Soldering Information

Infrared or Convection (20 sec) 235˚C

Wave Soldering Lead Temp. (10

sec) 260˚C

Human Body Model 2 kV

Machine Model 200V

Differential

V

IN

Supply Voltage (V

=V+–V−) 13.2V

S

Voltage at Input/Output Pins V

+

+ 0.3V, V−− 0.3V

±

300 mV

Input Current 10 mA

Storage Temperature Range −65˚C to +150˚C

Operating Ratings (Note 1)

Temperature Range (Note 3) −40˚C to +125˚C

Supply Voltage (V

Package Thermal Resistance (θ

5-Pin SOT23 234˚C/W

=V+–V−) 2.7V to 12V

S

(Note 3))

JA

3V Electrical Characteristics (Note 4)

Unless otherwise specified, all limits are guaranteed for TA= 25˚C, V+= 3V, V−= 0V, VCM=V+/2, and R

Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 6)

V

OS

TCV

I

B

I

OS

CMRR Common Mode Rejection Ratio 0V ≤ V

Input Offset Voltage

Input Offset Voltage Drift (Note 7)

OS

Input Bias Current (Notes 7, 8) 0.3 10

Input Offset Current 40 fA

≤ 3V 86

CM

Typ

(Note 5)

±

80

PSRR Power Supply Rejection Ratio 2.7V ≤ V+≤ 12V, Vo = V+/2 86

82

CMVR Input Common-Mode Voltage Range CMRR ≥ 80 dB

CMRR ≥ 77 dB

A

VOL

V

O

Large Signal Voltage Gain RL=2kΩ

= 0.3V to 2.7V

V

O

R

=10kΩ

L

= 0.2V to 2.8V

V

O

Output Swing High RL=2kΩ to V+/2 2.92

–0.2

–0.2

100

96

100

96

114

124

2.96

2.88

=10kΩ to V+/2 2.96

R

L

2.97

2.94

Output Swing Low R

=2kΩ to V+/2 0.04 0.06

L

RL=10kΩ to V+/2 0.02 0.04

I

O

Output Short Circuit Current
(Notes 3, 9)

I

S

Supply Current 0.670 1.0

SR Slew Rate (Note 10) A

Sourcing VO=0V

= 100 mV

V

IN

Sinking V
V

IN

= +1, VO=2V

V

=3V

O

= −100 mV

PP

25

15

25

20

10% to 90%

GBW Gain Bandwidth Product 2.5 MHz

THD+N Total Harmonic Distortion + Noise f = 1 kHz, Av = 1, R

e

n

Input-Referred Voltage Noise f = 1 kHz 12 nV/

=1kΩ 0.02 %

L

>

10 kΩ to V+/2.

L

Max

(Note 6)

37

±

1

±

200

±

500

±

5 µV/˚C

300

98

98

3.2

3.2

0.08

0.05

42

42

1.2

0.9 V/µs

Units

µV

pA

dB

dB

V

dB

V

V

mA

mA

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