LMP7731MA/NOPB National Semiconductor, LMP7731MA/NOPB Datasheet

IC AMP RRIO PREC SGL LN 8SOIC

LMP7731MA/NOPB

Manufacturer Part Number
LMP7731MA/NOPB
Description
IC AMP RRIO PREC SGL LN 8SOIC
Manufacturer
National Semiconductor
Series
LMP®, PowerWise®r
Datasheet

Specifications of LMP7731MA/NOPB

Amplifier Type
General Purpose
Number Of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
2.4 V/µs
Gain Bandwidth Product
22MHz
Current - Input Bias
14nA
Voltage - Input Offset
6µV
Current - Supply
2.5mA
Current - Output / Channel
49mA
Voltage - Supply, Single/dual (±)
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Number Of Channels
1
Voltage Gain Db
130 dB
Common Mode Rejection Ratio (min)
101 dB
Input Offset Voltage
0.5 mV at 5 V
Operating Supply Voltage
3 V, 5 V
Supply Current
3.4 mA at 5 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
Lead Free Status / Rohs Status
 Details
Other names
*LMP7731MA/NOPB
LMP7731MA
© 2009 National Semiconductor Corporation
2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier
General Description
The LMP7731 is a single, low noise, rail-to-rail input and out-
put, low voltage amplifier. The LMP7731 is part of the LMP
precision amplifier family and is ideal for precision and low
noise applications with low voltage requirements.
This operational amplifier offers low voltage noise of 2.9 nV/
input stages with a bias current of only 1.5 nA. This low input
bias current, complemented by the very low level of voltage
noise, makes the LMP7731 an excellent choice for photom-
etry applications.
The LMP7731 provides a wide GBW of 22 MHz while con-
suming only 2 mA of current. This high gain bandwidth along
with the high open loop gain of 130 dB enables accurate sig-
nal conditioning in applications with high closed loop gain
requirements.
The LMP7731 has a supply voltage range of 1.8V to 5.5V,
making it an ideal choice for battery operated portable appli-
cations.
The LMP7731 is offered in the space saving 5-Pin SOT-23
and 8-Pin SOIC packages.
Typical Performance Characteristics
LMP
Hz with a 1/f corner of only 3 Hz. The LMP7731 has bipolar
®
is a registered trademark of National Semiconductor Corporation.
Input Voltage Noise vs. Frequency
201752
20175261
LMP7731
®
Features
(Typical values, T
Applications
Input voltage noise
— f = 3 Hz
— f = 1 kHz
CMRR
Open loop gain
GBW
Slew rate
THD @ f = 10 kHz, A
Supply current per channel
Supply voltage range
Operating temperature range
Input bias current
RRIO
Gas analysis instruments
Photometric instrumentation
Medical instrumentation
Input Current Noise vs. Frequency
A
= 25°C, V
V
= +1, R
S
= 5V)
L
= 2 kΩ
−40°C to 125°C
www.national.com
May 20, 2009
1.8V to 5.5V
20175262
3.3 nV/
2.9 nV/
2.4 V/µs
22 MHz
±1.5 nA
0.001%
130 dB
130 dB
2.2 mA
Hz
Hz

Related parts for LMP7731MA/NOPB

LMP7731MA/NOPB Summary of contents

Page 1

... The LMP7731 is offered in the space saving 5-Pin SOT-23 and 8-Pin SOIC packages. Typical Performance Characteristics Input Voltage Noise vs. Frequency LMP ® registered trademark of National Semiconductor Corporation. © 2009 National Semiconductor Corporation LMP7731 Features (Typical values, T ■ ® Input voltage noise — ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Inputs pins only All other pins Machine Model Charge Device Model V Differential IN Supply Voltage ( – V ...

Page 3

Symbol Parameter Output Voltage Swing High V OUT Output Voltage Swing Low I Output Current OUT Supply Current I S (Per Channel) SR Slew Rate GBW Gain Bandwidth G Gain Margin M Φ Phase Margin M R Input Resistance IN ...

Page 4

Symbol Parameter TCI Input Offset Current Drift OS CMRR Common Mode Rejection Ratio PSRR Power Supply Rejection Ratio CMVR Common Mode Voltage Range A Open Loop Voltage Gain VOL Output Voltage Swing High V OUT Output Voltage Swing Low I ...

Page 5

Electrical Characteristics Unless otherwise specified, all limits are guaranteed for T limits apply at the temperature extremes. Symbol Parameter Input Offset Voltage V OS (Note 7) TCV Input Offset Voltage Temperature Drift OS I Input Bias Current B I ...

Page 6

Symbol Parameter G Gain Margin M Φ Phase Margin M R Input Resistance IN THD+N Total Harmonic Distortion + Noise Input Referred Voltage Noise Density e n Input Voltage Noise i Input Referred Current Noise Density n Note 1: Absolute ...

Page 7

Typical Performance Characteristics Offset Voltage Distribution Offset Voltage Distribution Offset Voltage Distribution Unless otherwise noted: T TCV 20175238 TCV 20175239 TCV 20175240 7 = 25°C, R > 10 kΩ / Distribution OS 20175234 ...

Page 8

Offset Voltage Distribution Offset Voltage vs. Temperature PSRR vs. Frequency www.national.com TCV 20175241 Offset Voltage vs. Temperature 20175251 CMRR vs. Frequency 20175229 8 Distribution OS 20175237 20175252 20175256 ...

Page 9

Offset Voltage vs. Supply Voltage 20175242 Offset Voltage vs 20175244 Input Offset Voltage Time Drift 20175230 Offset Voltage vs. V Offset Voltage vs. V Slew Rate vs. Supply Voltage 9 CM 20175243 CM 20175245 20175220 www.national.com ...

Page 10

Time Domain Voltage Noise Time Domain Voltage Noise Input Bias Current vs. V www.national.com Time Domain Voltage Noise 20175269 Output Voltage vs. Output Current 20175268 Input Bias Current vs 20175225 10 20175267 20175259 CM 20175226 ...

Page 11

Input Bias Current vs 20175227 Open Loop Frequency Response THD+N vs. Frequency 20175257 Open Loop Frequency Response Over Temperature Open Loop Frequency Response 20175219 THD+N vs. Output Voltage 11 20175218 20175228 20175258 www.national.com ...

Page 12

Large Signal Step Response Large Signal Step Response Supply Current vs. Supply Voltage www.national.com Small Signal Step Response 20175222 Small Signal Step Response 20175224 Output Swing High vs. Supply Voltage 20175246 12 20175221 20175223 20175250 ...

Page 13

Output Swing Low vs. Supply Voltage 20175249 Sourcing Current vs. Supply Voltage 20175248 Sinking Current vs, Supply Voltage 13 20175247 www.national.com ...

Page 14

... National Semiconductor is heavily committed to precision amplifiers and the market segment they serve. Technical sup- port and extensive characterization data are available for sensitive applications or applications with a constrained error budget ...

Page 15

FIGURE 3. 0 Input Voltage Noise Measuring the very low peak-to-peak noise performance of the LMP7731, requires special testing attention. In order to achieve accurate results, the device should be warmed up for at least five ...

Page 16

DRIVING AN ADC Analog to Digital Converters, ADCs, usually have a sampling capacitor on their input. When the ADC's input is directly con- nected to the output of the amplifier a charging current flows from the amplifier to the ADC. ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted 5-Pin SOT-23 NS Package Number MF05A 8-Pin SOIC NS Package Number M08A 17 www.national.com ...

Page 18

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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