LMP7732MM National Semiconductor, LMP7732MM Datasheet

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LMP7732MM

Manufacturer Part Number
LMP7732MM
Description
IC, OP AMP, PREC RRIO, DUAL, 8SOIC
Manufacturer
National Semiconductor
Datasheet

Specifications of LMP7732MM

Op Amp Type
Precision
No. Of Amplifiers
2
Bandwidth
22MHz
Slew Rate
2.4V/µs
Supply Voltage Range
1.8V To 5.5V
Amplifier Case Style
MSOP
No. Of Pins
8
Operating Temperature Range
-40°C To
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
© 2008 National Semiconductor Corporation
LMP7732
2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier
General Description
The LMP7732 is a dual low noise, low offset voltage, rail-to-
rail input and output, low voltage precision amplifier. The
LMP7732 is part of the LMP
ideal for precision and low noise applications with low voltage
requirements.
This operational amplifier offers low voltage noise of 2.9 nV/
maximum value of ±40 µV, targeting high accuracy, low fre-
quency applications. The LMP7732 has bipolar junction input
stages with a bias current of only 1.5 nA. This low input bias
current, complemented by the very low AC and DC levels of
voltage noise, makes the LMP7732 an excellent choice for
photometry applications.
The LMP7732 provides a wide GBW of 22 MHz while con-
suming only 4 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 LMP7732 has a supply voltage range of 1.8V to 5.5V,
making it an ideal choice for battery operated portable appli-
cations.
The LMP7732 is offered in the 8-Pin SOIC and MSOP pack-
ages.
The LMP7731 is the single version of this product and is of-
fered in the 5-Pin SOT-23 and 8-Pin SOIC packages.
Typical Application
LMP
®
is a registered trademark of National Semiconductor Corporation.
with a 1/f corner of only 3 Hz and low DC offset with a
®
precision amplifier family and is
300150
Thermopile Signal Amplifier
Features
(Typical values, T
Applications
Input voltage noise
— f = 3 Hz
— f = 1 kHz
Offset voltage (max)
Offset voltage drift (max)
CMRR
Open loop gain
GBW
Slew rate
THD @ f = 10 kHz, A
Supply current
Supply voltage range
Operating temperature range
Input bias current
RRIO
Thermopile amplifier
Gas analysis instruments
Photometric instrumentation
Medical instrumentation
A
= 25°C, V
V
30015001
= 1, R
S
= 5V)
L
= 2 kΩ
−40°C to 125°C
June 16, 2008
www.national.com
1.8V to 5.5V
3.3 nV/
2.9 nV/
±1.3 µV/°C
2.4 V/µs
22 MHz
±1.5 nA
0.001%
±40 µV
130 dB
130 dB
4.4 mA
Hz
Hz

Related parts for LMP7732MM

LMP7732MM Summary of contents

Page 1

... The LMP7732 is offered in the 8-Pin SOIC and MSOP pack- ages. The LMP7731 is the single version of this product and is of- fered in the 5-Pin SOT-23 and 8-Pin SOIC packages. Typical Application LMP ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation 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 For inputs pins only For all other pins Machine Model Charge Device Model V Differential IN Supply Voltage ( – ...

Page 3

Symbol Parameter V Output Voltage Swing High OUT Output Voltage Swing Low I Output Current OUT I Supply Current S SR Slew Rate GBW Gain Bandwidth G Gain Margin M Φ Phase Margin M R Input Resistance IN THD+N Total ...

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 V Output Voltage Swing High 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 V Input Offset Voltage OS (Note 7) TCV Input Offset Voltage Temperature Drift V OS Input Offset Voltage Time Drift ...

Page 6

... Note 6: All limits are guaranteed by testing, statistical analysis or design. Note 7: Ambient production test is performed at 25°C with a variance of ±3°C. Connection Diagram Ordering Information Package Part Number LMP7732MA 8-Pin SOIC LMP7732MAX LMP7732MM 8-Pin MSOP LMP7732MME LMP7732MMX www.national.com Conditions pF kΩ pF kΩ ...

Page 7

Typical Performance Characteristics Offset Voltage Distribution Offset Voltage Distribution Offset Voltage Distribution Unless otherwise noted: T TCV 30015071 TCV 30015073 TCV 30015070 7 = 25°C, R > 10 kΩ / Distribution OS 30015076 ...

Page 8

Offset Voltage Distribution Offset Voltage vs. Temperature PSRR vs. Frequency www.national.com TCV 30015072 Offset Voltage vs. Temperature 30015082 CMRR vs. Frequency 30015029 8 Distribution OS 30015075 30015083 30015062 ...

Page 9

Offset Voltage vs. Supply Voltage 30015053 Offset Voltage vs 30015055 Input Offset Voltage Time Drift 30015080 Offset Voltage vs. V Offset Voltage vs. V Slew Rate vs. Supply Voltage 9 CM 30015054 CM 30015056 30015020 www.national.com ...

Page 10

Input Voltage Noise vs. Frequency Time Domain Voltage Noise Time Domain Voltage Noise www.national.com Input Current Noise vs. Frequency 30015063 Time Domain Voltage Noise 30015067 Output Voltage vs. Output Current 30015066 10 30015064 30015065 30015057 ...

Page 11

Input Bias Current vs 30015025 Input Bias Current vs 30015027 Open Loop Frequency Response Input Bias Current vs. V Open Loop Frequency Response Over Temperature Open Loop Frequency Response 30015019 11 CM 30015026 30015018 30015028 www.national.com ...

Page 12

THD+N vs. Frequency Large Signal Step Response Large Signal Step Response www.national.com THD+N vs. Output Voltage 30015085 Small Signal Step Response 30015022 Small Signal Step Response 30015024 12 30015069 30015021 30015023 ...

Page 13

Supply Current vs. Supply Voltage 30015081 Output Swing Low vs. Supply Voltage 30015059 Sourcing Current vs. Supply Voltage 30015061 Output Swing High vs. Supply Voltage Sinking Current vs, Supply Voltage 13 30015058 30015060 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 is available for sen- sitive applications or applications with a constrained error budget ...

Page 15

The frequency response of this noise test circuit at the 0.1 Hz corner is defined by only one zero. The test time for the 0 noise measurement using this configuration should not exceed 10 seconds, as ...

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

FIGURE 7. Thermopile Thermopiles have very wide temperature ranges of -100°C to 1000°C When choosing a thermopile for a certain application, one must pay attention to several parameters. Some of these pa- rameters are discussed below: Thermopiles' sensitivity, or responsivity, ...

Page 18

Figure 8 shows the LMP7732 used as a thermopile amplifier. The LMP7732 is a great choice for use with thermopile sen- sors. The LMP7732 provides unprecedented accuracy and precision because of its very low input voltage noise and the very ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin SOIC NS Package Number M08A 8-Pin MSOP NS Package Number MUA08A 19 www.national.com ...

Page 20

... 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 Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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