5962L0620602VZA [TI]

双路、高精度、轨到轨输出运算放大器 | NAC | 10 | -55 to 125;
5962L0620602VZA
型号: 5962L0620602VZA
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

双路、高精度、轨到轨输出运算放大器 | NAC | 10 | -55 to 125

放大器 运算放大器
文件: 总13页 (文件大小:187K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
LMP2012QML Dual High Precision, Rail-to-Rail Output Operational Amplifier  
1
FEATURES  
DESCRIPTION  
The LMP2012 offers unprecedented accuracy and  
stability. This device utilizes patented techniques to  
measure and continually correct the input offset error  
voltage. The result is an amplifier which is ultra stable  
over time and temperature. It has excellent CMRR  
and PSRR ratings, and does not exhibit the familiar  
1/f voltage and current noise increase that plagues  
traditional amplifiers. The combination of the  
LMP2012 characteristics makes it a good choice for  
transducer amplifiers, high gain configurations, ADC  
buffer amplifiers, DAC I-V conversion, and any other  
2.7V-5V application requiring precision and long term  
stability.  
2
Total Ionizing Dose 50 krad(Si)  
ELDRS Free 50 krad(Si)  
TCVIO Temperature Sensitivity (Typical) 0.015  
µV/°C  
(For VS = 5V, Typical Unless Otherwise Noted)  
Low Ensured VIO over Temperature 60 µV  
Low Noise with no 1/f 35nV/Hz  
High CMRR 90 dB  
High PSRR 90 dB  
High AVOL 85 dB  
Wide Gain-Bandwidth Product 3MHz  
High Slew Rate 4V/µs  
Other useful benefits of the LMP2012 are rail-rail  
output, low supply current of 930 μA, and wide gain-  
bandwidth product of 3 MHz. These extremely  
versatile features found in the LMP2012 provide high  
performance and ease of use.  
Rail-to-Rail Output 30mV  
No External Capacitors Required  
The QMLV version of the LMP2012 has been rated to  
tolerate a total dose level of 50krad/(Si) radiation by  
test method 1019 of MIL-STD-883.  
APPLICATIONS  
Attitude and Orbital Controls  
Static Earth Sensing  
Sun Sensors  
Inertial Sensors  
Pressure Sensors  
Gyroscopes  
Earth Observation Systems  
Connection Diagram  
OUT A  
IN A-  
IN A+  
V-  
1
2
3
4
5
10  
9
V+  
OUT B  
IN B-  
8
IN B+  
7
N/C  
6
N/C  
Figure 1. 10-Lead CLGA (Top View)  
See NAC Package  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007–2013, Texas Instruments Incorporated  
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
Absolute Maximum Ratings(1)  
Supply Voltage  
5.8V  
±Supply Voltage  
714mW  
Differential Input Voltage  
Power Dissipation(2)  
Maximum Junction Temperature (TJmax  
Common-Mode Input Voltage  
Current at Input Pin  
)
150°C  
-0.3 VCM VCC +0.3V  
30 mA  
Current at Output Pin  
30 mA  
Current at Power Supply Pin  
Operating Temperature Range  
Storage Temperature Range  
50 mA  
-55°C to +125°C  
-55°C to +150°C  
+260°C  
CLGA Lead Temperature (soldering 10 sec.)  
Thermal Resistance  
θJA  
CLGA (Still Air)  
CLGA (500LF/Min Air Flow)  
CLGA  
175°C/W  
115°C/W  
θJC  
12.3°C/W  
Package Weight  
ESD Tolerance(3)  
CLGA  
220mg  
4000V  
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for  
which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the  
Electrical Characteristics. The ensured specifications apply only for the test conditions listed. Some performance characteristics may  
degrade when the device is not operated under the listed test conditions.  
(2) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature),  
θJA (package junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any  
temperature is PDmax = (TJmax - TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower.  
(3) Human body model, 1.5 kΩ in series with 100 pF.  
Quality Conformance Inspection  
Table 1. Mil-Std-883, Method 5005 - Group A  
Subgroup  
Description  
Static tests at  
Temp (°C)  
+25  
1
2
Static tests at  
+125  
-55  
3
Static tests at  
4
Dynamic tests at  
Dynamic tests at  
Dynamic tests at  
Functional tests at  
Functional tests at  
Functional tests at  
Switching tests at  
Switching tests at  
Switching tests at  
Setting time at  
+25  
5
+125  
-55  
6
7
+25  
8A  
8B  
9
+125  
-55  
+25  
10  
11  
12  
13  
14  
+125  
-55  
+25  
Setting time at  
+125  
-55  
Setting time at  
2
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
LMP2012 Electrical Characteristics 2.7V DC Parameters  
The following conditions apply, unless otherwise specified.  
V+ = 2.7V, V-= 0V, V CM = 1.35V, VO = 1.35V and RL > 1 MΩ.  
Sub-  
groups  
Symbol  
VIO  
Parameter  
Conditions  
Notes  
Typ(1)  
Min  
Max  
Units  
0.8  
36  
60  
10  
12  
1
Input Offset Voltage  
μV  
2, 3  
1
0.5  
Offset Calibration Time  
ms  
2, 3  
TCVIO  
Input Offset Voltage  
(Temperature Sensitivity)  
0.015  
µV/°C  
IIB  
Input Bias Current  
3  
6
pA  
pA  
IIO  
Input Offset Current  
CMRR  
Common Mode Rejection Ratio  
0.3 VCM 0.9V  
0 VCM 0.9V  
130  
95  
90  
1
2, 3  
1
dB  
dB  
PSRR  
AVOL  
Power Supply Rejection Ratio  
Open Loop Voltage Gain  
120  
130  
95  
90  
2, 3  
1
95  
RL = 10 kΩ  
RL = 2 kΩ  
90  
2, 3  
1
dB  
V
124  
90  
85  
2, 3  
1
VO  
Output Swing  
2.68  
0.033  
2.65  
0.061  
12  
2.64  
2.63  
2, 3  
1
RL = 10 kto 1.35V  
VIN(diff) = ±0.5V  
0.060  
0.075  
2,3  
1
2.615  
2.6  
2, 3  
1
RL = 2 kto 1.35V  
VIN(diff) = ±0.5V  
V
0.085  
0.105  
2, 3  
1
IO  
Output Current  
5
3
5
3
Sourcing, VO = 0V  
VIN(diff) = ±0.5V  
2, 3  
1
mA  
mA  
18  
Sinking, VO = 5V  
VIN(diff) = ±0.5V  
2, 3  
1
IS  
0.919  
1.20  
1.50  
Supply Current per Channel  
2, 3  
(1) Typical values represent the most likely parametric norm.  
Copyright © 2007–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
3
Product Folder Links: LMP2012QML  
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
LMP2012 Electrical Characteristics 2.7V AC Parameters  
The following conditions apply, unless otherwise specified.  
V+ = 2.7V, V -= 0V, VCM = 1.35V, VO = 1.35V, and RL > 1 MΩ.  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Typ(1)  
Min  
Max  
Units  
GBW  
Gain-Bandwidth Product  
Slew Rate  
3
4
1
5
MHz  
V/μs  
Deg  
4
SR  
θm  
Phase Margin  
60  
14  
35  
850  
50  
Gm  
en  
Gain Margin  
dB  
Input-Referred Voltage Noise  
Input-Referred Voltage Noise  
Input Overload Recovery Time  
nV/Hz  
nVPP  
ms  
enP-P  
trec  
RS = 100, DC to 10 Hz  
(1) Typical values represent the most likely parametric norm.  
LMP2012 Electrical Characteristics 2.7V DC Parameters – 50 krad(Si) Post Radiation Limits @  
+25°C(1)  
The following conditions apply, unless otherwise specified.  
V+ = 2.7V, V -= 0V, VCM = 1.35V, VO = 1.35V, and RL > 1 MΩ.  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Typ  
Min  
Max  
Units  
IS  
Supply Current per Channel  
1.75  
mA  
1
(1) Pre and post irradiation limits are identical to those listed under DC Parameters, except those listed in the Post Radiation Limit tables.  
LMP2012 Electrical Characteristics 2.7V Operating Life Test Delta Parameters TA = +25°C  
This is worst case drift, deltas are performed at room temperature post operation life. All other parameters, no deltas required.  
Symbol  
Parameter  
Input offset voltage  
Conditions  
Limit  
Units  
VIO  
2.7 V  
±2  
μV  
4
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
LMP2012 Electrical Characteristics 5V DC Parameters  
The following conditions apply, unless otherwise specified.  
V+ = 5V, V-= 0V, V CM = 2.5V, VO = 2.5V and RL > 1MΩ.  
Sub-  
groups  
Symbol  
VIO  
Parameter  
Conditions  
Notes  
Typ(1)  
Min  
Max  
Units  
Input Offset Voltage  
0.12  
36  
60  
10  
12  
1
μV  
2, 3  
1
Offset Calibration Time  
0.5  
ms  
2, 3  
TCVIO  
Input Offset Voltage  
(Temperature Sensitivity)  
0.015  
µV/°C  
IIB  
Input Bias Current  
3  
6
pA  
pA  
IIO  
Input Offset Current  
CMRR  
Common Mode Rejection Ratio  
0.3 VCM 3.2  
0 VCM 3.2  
130  
100  
90  
1
2, 3  
1
dB  
dB  
PSRR  
AVOL  
Power Supply Rejection Ratio  
Open Loop Voltage Gain  
120  
130  
95  
90  
2, 3  
1
RL = 10 kΩ  
RL = 2 kΩ  
105  
100  
95  
2, 3  
1
dB  
V
132  
90  
2, 3  
1
VO  
Output Swing  
RL = 10 kto 2.5V  
VIN(diff) = ±0.5V  
4.978  
0.040  
4.919  
0.091  
15  
4.92  
4.91  
2, 3  
1
0.080  
0.095  
2, 3  
1
RL = 2 kto 2.5V  
VIN(diff) = ±0.5V  
4.875  
4.855  
2, 3  
1
V
0.125  
0.150  
2, 3  
1
IO  
Output Current  
Sourcing, VO = 0V  
VIN(diff) = ±0.5V  
8
6
8
6
2, 3  
1
mA  
mA  
Sourcing, VO = 5V  
VIN(diff) = ±0.5V  
17  
2, 3  
1
IS  
Supply Current per Channel  
0.930  
1.20  
1.50  
2, 3  
(1) Typical values represent the most likely parametric norm.  
Copyright © 2007–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
5
Product Folder Links: LMP2012QML  
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
LMP2012 Electrical Characteristics 5V AC Parameters  
The following conditions apply, unless otherwise specified.  
V+ = 5V, V -= 0V, VCM = 2.5V, VO = 2.5V, and RL > 1 MΩ.  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Typ(1)  
Min  
Max  
Units  
GBW  
Gain-Bandwidth Product  
Slew Rate  
3
4
1
5
MHz  
V/μs  
Deg  
4
SR  
θm  
Phase Margin  
60  
15  
35  
850  
50  
Gm  
en  
Gain Margin  
dB  
Input-Referred Voltage Noise  
Input-Referred Voltage Noise  
Input Overload Recovery Time  
nV/Hz  
nVPP  
ms  
enP-P  
trec  
RS = 100, DC to 10 Hz  
(1) Typical values represent the most likely parametric norm.  
LMP2012 Electrical Characteristics 5V DC Parameters – 50 krad(Si) Post Radiation Limits @  
+25°C(1)  
The following conditions apply, unless otherwise specified.  
V+ = 5V, V -= 0V, VCM = 2.5V, VO = 2.5V, and RL > 1 MΩ.  
Sub-  
groups  
Symbol  
Parameter  
Conditions  
Notes  
Typ  
Min  
Max  
Units  
IS  
Supply Current per Channel  
1.75  
mA  
1
(1) Pre and post irradiation limits are identical to those listed under DC Parameters, except those listed in the Post Radiation Limit tables.  
LMP2012 Electrical Characteristics 5V Operating Life Test Delta Parameters TA = +25°C  
This is worst case drift, deltas are performed at room temperature post operation life. All other parameters, no deltas required.  
Symbol  
Parameter  
Input offset voltage  
Conditions  
Limit  
Units  
VIO  
5.0 V  
±2  
μV  
6
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
APPLICATION INFORMATION  
THE BENEFITS OF LMP2012 NO 1/f NOISE  
Using patented methods, the LMP2012 eliminates the 1/f noise present in other amplifiers. That noise, which  
increases as frequency decreases, is a major source of measurement error in all DC-coupled measurements.  
Low-frequency noise appears as a constantly-changing signal in series with any measurement being made. As a  
result, even when the measurement is made rapidly, this constantly-changing noise signal will corrupt the result.  
The value of this noise signal can be surprisingly large. For example: If a conventional amplifier has a flat-band  
noise level of 10nV/Hz and a noise corner of 10 Hz, the RMS noise at 0.001 Hz is 1µV/Hz. This is equivalent  
to a 0.50 µV peak-to-peak error, in the frequency range 0.001 Hz to 1.0 Hz. In a circuit with a gain of 1000, this  
produces a 0.50 mV peak-to-peak output error. This number of 0.001 Hz might appear unreasonably low, but  
when a data acquisition system is operating for 17 minutes, it has been on long enough to include this error. In  
this same time, the LMP2012 will only have a 0.21 mV output error. This is smaller by 2.4 x. Keep in mind that  
this 1/f error gets even larger at lower frequencies. At the extreme, many people try to reduce this error by  
integrating or taking several samples of the same signal. This is also doomed to failure because the 1/f nature of  
this noise means that taking longer samples just moves the measurement into lower frequencies where the noise  
level is even higher.  
The LMP2012 eliminates this source of error. The noise level is constant with frequency so that reducing the  
bandwidth reduces the errors caused by noise.  
OVERLOAD RECOVERY  
The LMP2012 recovers from input overload much faster than most chopper-stabilized op amps. Recovery from  
driving the amplifier to 2X the full scale output, only requires about 40 ms. Many chopper-stabilized amplifiers will  
take from 250 ms to several seconds to recover from this same overload. This is because large capacitors are  
used to store the unadjusted offset voltage.  
Figure 2.  
The wide bandwidth of the LMP2012 enhances performance when it is used as an amplifier to drive loads that  
inject transients back into the output. ADCs (Analog-to-Digital Converters) and multiplexers are examples of this  
type of load. To simulate this type of load, a pulse generator producing a 1V peak square wave was connected  
to the output through a 10 pF capacitor. See Figure 2. The typical time for the output to recover to 1% of the  
applied pulse is 80 ns. To recover to 0.1% requires 860ns. This rapid recovery is due to the wide bandwidth of  
the output stage and large total GBW.  
NO EXTERNAL CAPACITORS REQUIRED  
The LMP2012 does not need external capacitors. This eliminates the problems caused by capacitor leakage and  
dielectric absorption, which can cause delays of several seconds from turn-on until the amplifier's error has  
settled.  
MORE BENEFITS  
The LMP2012 offers the benefits mentioned above and more. It has a rail-to-rail output and consumes only 950  
µA of supply current while providing excellent DC and AC electrical performance. In DC performance, the  
LMP2012 achieves 130 dB of CMRR, 120 dB of PSRR and 130 dB of open loop gain. In AC performance, the  
LMP2012 provides 3 MHz of gain-bandwidth product and 4 V/µs of slew rate.  
Copyright © 2007–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
7
Product Folder Links: LMP2012QML  
 
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
HOW THE LMP2012 WORKS  
The LMP2012 uses new, patented techniques to achieve the high DC accuracy traditionally associated with  
chopper-stabilized amplifiers without the major drawbacks produced by chopping. The LMP2012 continuously  
monitors the input offset and corrects this error. The conventional chopping process produces many mixing  
products, both sums and differences, between the chopping frequency and the incoming signal frequency. This  
mixing causes large amounts of distortion, particularly when the signal frequency approaches the chopping  
frequency. Even without an incoming signal, the chopper harmonics mix with each other to produce even more  
trash. If this sounds unlikely or difficult to understand, look at the plot in Figure 3, of the output of a typical  
(MAX432) chopper-stabilized op amp. This is the output when there is no incoming signal, just the amplifier in a  
gain of -10 with the input grounded. The chopper is operating at about 150 Hz; the rest is mixing products. Add  
an input signal and the noise gets much worse. Compare this plot with Figure 4 of the LMP2012. This data was  
taken under the exact same conditions. The auto-zero action is visible at about 30 kHz but note the absence of  
mixing products at other frequencies. As a result, the LMP2012 has very low distortion of 0.02% and very low  
mixing products.  
Figure 3.  
10000  
V
= 5V  
S
1000  
100  
10  
0.1  
1M  
1k  
10k 100k  
1
10  
100  
FREQUENCY (Hz)  
Figure 4.  
INPUT CURRENTS  
The LMP2012's input currents are different than standard bipolar or CMOS input currents in that it appears as a  
current flowing in one input and out the other. Under most operating conditions, these currents are in the  
picoamp level and will have little or no effect in most circuits. These currents tend to increase slightly when the  
common-mode voltage is near the minus supply. At high temperatures, the input currents become larger, 0.5 nA  
typical, and are both positive except when the VCM is near V. If operation is expected at low common-mode  
voltages and high temperature, do not add resistance in series with the inputs to balance the impedances. Doing  
this can cause an increase in offset voltage. A small resistance such as 1 kcan provide some protection  
against very large transients or overloads, and will not increase the offset significantly.  
8
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
 
 
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
PRECISION STRAIN-GAUGE AMPLIFIER  
This Strain-Gauge amplifier (Figure 5) provides high gain (1006 or ~60 dB) with very low offset and drift. Using  
the resistors' tolerances as shown, the worst case CMRR will be greater than 108 dB. The CMRR is directly  
related to the resistor mismatch. The rejection of common-mode error, at the output, is independent of the  
differential gain, which is set by R3. The CMRR is further improved, if the resistor ratio matching is improved, by  
specifying tighter-tolerance resistors, or by trimming.  
5V  
+
V
OUT  
-
+
-
R1  
R2  
2k, 1%  
R2  
R1  
10k, 0.1%  
10k, 0.1%  
2k, 1%  
R3  
20W  
Figure 5.  
Extending Supply Voltages and Output Swing by Using a Composite Amplifier Configuration:  
In cases where substantially higher output swing is required with higher supply voltages, arrangements like the  
ones shown in Figure 6 and Figure 7 could be used. These configurations utilize the excellent DC performance  
of the LMP2012 while at the same time allow the superior voltage and frequency capabilities of the LM6171 to  
set the dynamic performance of the overall amplifier. For example, it is possible to achieve ±12V output swing  
with 300 MHz of overall GBW (AV = 100) while keeping the worst case output shift due to VOS less than 4 mV.  
The LMP2012 output voltage is kept at about mid-point of its overall supply voltage, and its input common mode  
voltage range allows the V- terminal to be grounded in one case (Figure 6, inverting operation) and tied to a  
small non-critical negative bias in another (Figure 7, non-inverting operation). Higher closed-loop gains are also  
possible with a corresponding reduction in realizable bandwidth. Table 2 shows some other closed loop gain  
possibilities along with the measured performance in each case.  
C2  
R2  
R7, 3.9k  
+15V  
C4  
1N4733A  
(5.1V)  
D1  
0.01  
mF  
R1  
2
3
7
-
3
Input  
7
LMP201X  
U1  
+
Output  
6
6
LM6171  
U2  
+
4
2
-
4
-15V  
(+2.5V)  
+15V R3  
20k  
R5, 1M  
C3  
0.01 mF  
R4  
3.9k  
Figure 6.  
Copyright © 2007–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
9
Product Folder Links: LMP2012QML  
 
 
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
Table 2. Composite Amplifier Measured Performance  
AV  
R1  
R2  
C2  
pF  
BW  
MHz  
SR  
(V/μs)  
en p-p  
(mVPP  
)
50  
100  
100  
500  
1000  
200  
100  
1k  
10k  
10k  
8
3.3  
2.5  
178  
174  
170  
96  
37  
10  
70  
100k  
100k  
100k  
0.67  
1.75  
2.2  
3.1  
70  
200  
100  
1.4  
250  
400  
0.98  
64  
In terms of the measured output peak-to-peak noise, the following relationship holds between output noise  
voltage, en p-p, for different closed-loop gain, AV, settings, where 3 dB Bandwidth is BW:  
C2  
R2  
R7, 3.9k  
+15V  
1N4731A  
(4.3V)  
D1  
C4  
0.01  
mF  
R1  
2
3
7
-
3
7
LMP201X  
U1  
+
Output  
6
6
LM6171  
U2  
+
4
-15V  
Input  
2
-
4
R6  
(-0.7V)  
10k  
+15V  
(+2.5V)  
R5, 1M  
R3  
C5  
0.01 mF  
20k  
C3  
0.01 mF  
D2  
1N4148  
R4  
3.9k  
Figure 7.  
It should be kept in mind that in order to minimize the output noise voltage for a given closed-loop gain setting,  
one could minimize the overall bandwidth. As can be seen from Equation 1 above, the output noise has a  
square-root relationship to the Bandwidth.  
In the case of the inverting configuration, it is also possible to increase the input impedance of the overall  
amplifier, by raising the value of R1, without having to increase the feed-back resistor, R2, to impractical values,  
by utilizing a "Tee" network as feedback. See the LMC6442 data sheet (Application Notes section) for more  
details on this.  
+5V  
430W  
(0V to 5V Range)  
+Input  
+5V  
+V  
REF  
+2.5V  
-
ADC1203X  
LMP201X  
+
-V  
REF  
LM9140-2.5  
-Input  
V
IN  
GND  
1M  
Figure 8.  
10  
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
 
LMP2012QML  
www.ti.com  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
LMP2012 AS ADC INPUT AMPLIFIER  
The LMP2012 is a great choice for an amplifier stage immediately before the input of an ADC (Analog-to-Digital  
Converter), whether AC or DC coupled. See Figure 8 and Figure 9. This is because of the following important  
characteristics:  
A)  
Very low offset voltage and offset voltage drift over time and temperature allow a high closed-loop gain  
setting without introducing any short-term or long-term errors. For example, when set to a closed-loop gain  
of 100 as the analog input amplifier for a 12-bit A/D converter, the overall conversion error over full  
operation temperature and 30 years life of the part (operating at 50°C) would be less than 5 LSBs.  
B)  
C)  
Fast large-signal settling time to 0.01% of final value (1.4 μs) allows 12 bit accuracy at 100 KHZ or more  
sampling rate.  
No flicker (1/f) noise means unsurpassed data accuracy over any measurement period of time, no matter  
how long. Consider the following op amp performance, based on a typical low-noise, high-performance  
commercially-available device, for comparison:  
Op amp flatband noise = 8nV/Hz  
1/f corner frequency = 100 Hz  
AV = 2000  
Measurement time = 100 sec  
Bandwidth = 2 Hz  
This example will result in about 2.2 mVPP (1.9 LSB) of output noise contribution due to the op amp alone,  
compared to about 594 μVPP (less than 0.5 LSB) when that op amp is replaced with the LMP2012 which  
has no 1/f contribution. If the measurement time is increased from 100 seconds to 1 hour, the  
improvement realized by using the LMP2012 would be a factor of about 4.8 times (2.86 mVPP compared to  
596 μV when LMP2012 is used) mainly because the LMP2012 accuracy is not compromised by increasing  
the observation time.  
D)  
Rail-to-Rail output swing maximizes the ADC dynamic range in 5-Volt single-supply converter applications.  
Below are some typical block diagrams showing the LMP2012 used as an ADC amplifier (Figure 8 and  
Figure 9).  
Figure 9.  
RADIATION ENVIRONMENTS  
Careful consideration should be given to environmental conditions when using a product in a radiation  
environment.  
TOTAL IONIZING DOSE  
Radiation hardness assured (RHA) products are those part numbers with a total ionizing dose (TID) level  
specified in the Ordering Information table on the front page. Testing and qualification of these products is done  
on a wafer level according to MIL-STD-883G, Test Method 1019.7, Condition A and the “Extended room  
temperature anneal test” described in section 3.11 for application environment dose rates less than 0.082  
rad(Si)/s. Wafer level TID data are available with lot shipments.  
Copyright © 2007–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
11  
Product Folder Links: LMP2012QML  
 
LMP2012QML  
SNOSAU5H MARCH 2007REVISED APRIL 2013  
www.ti.com  
ELDRS-FREE PRODUCTS  
ELDRS-Free products are tested and qualified on a wafer level basis at a dose rate of 10 mrad(Si)/s per MIL-  
STD-883G, Test Method 1019.7, Condition D. Wafer level low dose rate test data are available with lot  
shipments.  
SINGLE EVENT UPSET  
A report on single event upset (SEU) is available upon request.  
Revision History  
Date Released  
03/19/07  
Revision  
Section  
Changes  
A
B
Initial Release  
Electrical Section  
Initial Release  
10/17/08  
Added typical parameters to 2.7V and 5V AC  
Electrical Sections. Revision A will be Archived.  
07/13/09  
12/08/09  
C
D
E
2.7V DC and 5V DC Electrical Section  
Features, Ordering Information and Notes  
Added typical parameter TCVOS to 2.7V DC and 5V  
DC Electrical Section. Revision B will be Archived.  
Reference to ELDRS, New ELDRS part number and  
added ELDRS Note 6. Revision C will be Archived.  
06/08/2010  
General Description, 2.7V DC and 5V DC  
Electrical Section added New Radiation  
Section.  
Removed first line. Added Delta Table to Electrical's  
to match what is in the SMD and New Radiation  
Section. Revision D will be Archived.  
11/30/2010  
04/02/2013  
F
AC Electrical 5V parameter table conditions Correct typo to unless otherwise specified parameters  
From: V+ = 2.7V, V -= 0V, VCM = 1.35V, VO = 1.35V,  
and RL > 1 MΩ. To: V+ = 5V, V -= 0V, VCM = 2.5V, VO  
= 2.5V, and RL > 1 MΩ. Revision E will be Archived.  
H
All  
Changed layout of National Data Sheet to TI format  
12  
Submit Documentation Feedback  
Copyright © 2007–2013, Texas Instruments Incorporated  
Product Folder Links: LMP2012QML  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other  
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest  
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and  
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale  
supplied at the time of order acknowledgment.  
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms  
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary  
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily  
performed.  
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and  
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide  
adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or  
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information  
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or  
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the  
third party, or a license from TI under the patents or other intellectual property of TI.  
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration  
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered  
documentation. Information of third parties may be subject to additional restrictions.  
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service  
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.  
TI is not responsible or liable for any such statements.  
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements  
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support  
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which  
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause  
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use  
of any TI components in safety-critical applications.  
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to  
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and  
requirements. Nonetheless, such components are subject to these terms.  
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties  
have executed a special agreement specifically governing such use.  
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in  
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components  
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and  
regulatory requirements in connection with such use.  
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of  
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.  
Products  
Applications  
Audio  
www.ti.com/audio  
amplifier.ti.com  
dataconverter.ti.com  
www.dlp.com  
Automotive and Transportation www.ti.com/automotive  
Communications and Telecom www.ti.com/communications  
Amplifiers  
Data Converters  
DLP® Products  
DSP  
Computers and Peripherals  
Consumer Electronics  
Energy and Lighting  
Industrial  
www.ti.com/computers  
www.ti.com/consumer-apps  
www.ti.com/energy  
dsp.ti.com  
Clocks and Timers  
Interface  
www.ti.com/clocks  
interface.ti.com  
logic.ti.com  
www.ti.com/industrial  
www.ti.com/medical  
Medical  
Logic  
Security  
www.ti.com/security  
Power Mgmt  
Microcontrollers  
RFID  
power.ti.com  
Space, Avionics and Defense  
Video and Imaging  
www.ti.com/space-avionics-defense  
www.ti.com/video  
microcontroller.ti.com  
www.ti-rfid.com  
www.ti.com/omap  
OMAP Applications Processors  
Wireless Connectivity  
TI E2E Community  
e2e.ti.com  
www.ti.com/wirelessconnectivity  
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265  
Copyright © 2013, Texas Instruments Incorporated  

相关型号:

5962L0924402VHA

Aerospace High Voltage Current Shunt Monitor
ADI

5962L1121204V9A

Adjustable Positive LDO Regulator
RENESAS

5962L1321403VXC

Operational Amplifier
RENESAS

5962L1322002V9A

Adjustable Positive LDO Regulator
RENESAS

5962L1324502VXA

Aerospace Dual Low Noise, Rail-to-Rail I/O, Low Power Operational Amplifiers
ADI

5962L1324802V9A

Operational Amplifier
RENESAS

5962L1324802VXC

Operational Amplifier
RENESAS

5962L1420901VXC

具有待机模式和环回功能的耐辐射加固保障 (RHA) 3.3V CAN 收发器 | HKX | 8 | -55 to 125
TI

5962L1422603VXC

Operational Amplifier
RENESAS

5962L1423101VXC

高分辨率模数转换器 (ADC) | HKV | 28 | -55 to 125
TI

5962L1423102VXC

高分辨率模数转换器 (ADC) | HKV | 28 | -55 to 115
TI

5962L1522801V9A

3.3V Radiation Tolerant CAN Transceiver, 1Mbps, Listen Mode, Loopback
INTERSIL