LMV712LDX [TI]

LMV712-N Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent Shutdown; LMV712 -N的低功耗,低噪声,高输出, RRIO双带独立的关断运算放大器
LMV712LDX
型号: LMV712LDX
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

LMV712-N Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent Shutdown
LMV712 -N的低功耗,低噪声,高输出, RRIO双带独立的关断运算放大器

运算放大器 放大器电路 信息通信管理
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LMV712-N  
www.ti.com  
SNOS534G MAY 2004REVISED MARCH 2010  
LMV712-N Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with  
Independent Shutdown  
Check for Samples: LMV712-N  
1
FEATURES  
2
(Typical Unless Otherwise Noted)  
1.5µA Shutdown ICC  
2.2µs Turn On  
5MHz GBP  
Slew Rate 5V/µs  
APPLICATIONS  
Low Noise 20nV/Hz  
Power Amplifier Control Loop  
Cellular Phones  
Supply Current 1.22mA/Channel  
VOS< 3mV Max  
Portable Equipment  
Wireless LAN  
Guaranteed 2.7V and 5V Specifications  
Rail-to-Rail Inputs and Outputs  
Unity Gain Stable  
Radio Systems  
Cordless Phones  
Small Package: 10-Pin WSON, 10-Pin VSSOP  
and 10-Bump DSBGA  
DESCRIPTION  
The LMV712-N duals are high performance BiCMOS operational amplifiers intended for applications requiring  
Rail-to-Rail inputs combined with speed and low noise. They offer a bandwidth of 5MHz and a slew rate of 5  
V/µs and can handle capacitive loads of up to 200pF without oscillation.  
The LMV712-N is guaranteed to operate from 2.7V to 5.5V and offers two independent shutdown pins. This  
feature allows disabling of each device separately and reduces the supply current to less than 1µA typical. The  
output voltage rapidly ramps up smoothly with no glitch as the amplifier comes out of the shutdown mode.  
The LMV712-N with the shutdown feature is offered in space saving 10-Bump DSBGA and 10-Pin WSON  
packages. It is also offered in 10-Pin VSSOP package. These packages are designed to meet the demands of  
small size, low power, and low cost required by cellular phones and similar battery operated portable electronics.  
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.  
2
All trademarks are the property of their respective owners.  
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 © 2004–2010, Texas Instruments Incorporated  
LMV712-N  
SNOS534G MAY 2004REVISED MARCH 2010  
www.ti.com  
Typical Application Circuit  
Figure 1. P.A. Control Loop  
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)(2)  
Absolute Maximum Ratings  
ESD Tolerance  
(3)  
Human Body Model  
1.5kV  
150V  
Machine Model  
Differential Input Voltage  
Voltage at Input/Output Pin  
Supply Voltage (V+ - V)  
Output Short Circuit V+  
Output Short Circuit V−  
Current at Input Pin  
±Supply Voltage  
(V+) +0.4V to (V) 0.4V  
6V  
(4)  
(4)  
±10mA  
±50mA  
Current at Output Pin  
Storage Temp Range  
Junction Temperature TJMAX  
65°C to 150°C  
150°C  
(5)  
Soldering specification for WSON SnPb:  
Infrared or Convection (20sec)  
235°C  
Soldering specification for all other packages:  
see product folder at www.national.com and  
www.national.com/ms/MS/MS-SOLDERING.pdf  
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for  
which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test  
conditions, see the Electrical Characteristics.  
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office / Distributors for  
availability and specifications.  
(3) Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of  
JEDEC)Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).  
(4) Shorting circuit output to either V+ or Vwill adversely affect reliability.  
(5) The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is  
PD = (TJ(MAX) – TA)/ θJA. All numbers apply for packages soldered directly onto a PC Board.  
2
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LMV712-N  
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SNOS534G MAY 2004REVISED MARCH 2010  
(1)  
Recommended Operating Conditions  
Supply Voltage  
2.7V to 5.5V  
Temperature Range  
40°C TJ 85°C  
Thermal Resistance  
10-Pin VSSOP  
235°C/W  
53.4°C/W  
196°C/W  
10-Pin WSON  
10-Bump DSBGA  
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for  
which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test  
conditions, see the Electrical Characteristics.  
2.7V Electrical Characteristics  
Unless otherwise specified, all limits guaranteed for V+ = 2.7V, V = 0V, VCM = 1.35V and TA = 25°C and RL > 1M.  
Boldface limits apply at the temperature extremes.  
Symbol  
Parameter  
Condition  
Min  
Typ  
Max  
Units  
(1)  
(2)  
(1)  
VSSOP  
WSON  
0.4  
3
3
3.2  
VCM = 0.85V and  
VCM = 1.85V  
VOS  
Input Offset Voltage  
mV  
DSBGA  
7
9
5.5  
75  
90  
90  
115  
130  
IB  
Input Bias Current  
pA  
dB  
dB  
dB  
50  
45  
CMRR  
Common Mode Rejection Ratio  
0V VCM 2.7V  
2.7V V+ 5V,  
VCM = 0.85V  
2.7V V+ 5V,  
VCM = 1.85V  
70  
68  
PSRR  
CMVR  
ISC  
Power Supply Rejection Ratio  
Common Mode Voltage Range  
Output Short Circuit Current  
70  
68  
For CMRR 50dB  
0.3  
3
0.2  
V
2.9  
Sourcing  
VO = 0V  
15  
12  
25  
mA  
mA  
V
Sinking  
VO = 2.7V  
25  
22  
50  
2.62  
2.60  
2.68  
0.01  
2.55  
0.05  
RL = 10kto 1.35V  
RL = 600to 1.35V  
0.12  
0.15  
V
VO  
Output Swing  
2.52  
2.50  
V
0.23  
0.30  
V
VO(SD)  
IS  
Output Voltage in Shutdown  
Supply Current per Channel  
10  
200  
mV  
mA  
1.22  
1.7  
1.9  
On Mode  
0.12  
1.5  
2.0  
Shutdown Mode  
uA  
(1) All limits are guaranteed by testing or statistical analysis.  
(2) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary  
over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on  
shipped production material.  
Copyright © 2004–2010, Texas Instruments Incorporated  
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Product Folder Links: LMV712-N  
LMV712-N  
SNOS534G MAY 2004REVISED MARCH 2010  
www.ti.com  
2.7V Electrical Characteristics (continued)  
Unless otherwise specified, all limits guaranteed for V+ = 2.7V, V = 0V, VCM = 1.35V and TA = 25°C and RL > 1M.  
Boldface limits apply at the temperature extremes.  
Symbol  
Parameter  
Condition  
Min  
Typ  
Max  
Units  
dB  
(1)  
(2)  
(1)  
Sourcing  
RL = 10kΩ  
80  
76  
115  
113  
97  
VO = 1.35V to 2.3V  
Sinking  
RL = 10kΩ  
80  
76  
dB  
VO = 0.4V to 1.35V  
AVOL  
Large Signal Voltage Gain  
Sourcing  
RL = 600Ω  
80  
dB  
VO = 1.35V to 2.2V  
76  
Sinking  
RL = 600Ω  
80  
100  
dB  
VO = 0.5V to 1.35V  
76  
On Mode  
2.4 to 2.7 2.0 to 2.7  
V
V
VSD  
Shutdown Pin Voltage Range  
Shutdown Mode  
0 to 0.8  
0 to 1  
5
GBWP  
SR  
Gain-Bandwidth Product  
Slew Rate  
MHz  
V/µs  
Deg  
nV/Hz  
(3)  
5
φm  
Phase Margin  
60  
20  
2.2  
en  
Input Referred Voltage Noise  
f = 1kHz  
4
4.6  
Turn-On Time from Shutdown  
Turn-On Time from Shutdown  
μs  
μs  
TON  
6
8
DSBGA  
(3) Number specified is the slower of the positive and negative slew rates.  
5V Electrical Characteristics  
Unless otherwise specified, all limits guaranteed for V+ = 5V, V = 0V, VCM = 2.5V and TA = 25°C and RL > 1M. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Condition  
Min  
Typ  
Max  
Units  
(1)  
(2)  
(1)  
VSSOP  
WSON  
0.4  
3
3
3.2  
VCM = 0.85V and  
VCM = 1.85V  
VOS  
Input Offset Voltage  
mV  
DSBGA  
7
9
5.5  
80  
90  
90  
115  
130  
IB  
Input Bias Current  
pA  
dB  
dB  
dB  
0V VCM 5V  
50  
45  
CMRR  
Common Mode Rejection Ratio  
2.7V V+ 5V,  
VCM = 0.85V  
2.7V V+ 5V,  
VCM = 1.85V  
70  
68  
PSRR  
CMVR  
ISC  
Power Supply Rejection Ratio  
Common Mode Voltage Range  
Output Short Circuit Current  
70  
68  
For CMRR 50dB  
0.3  
5.3  
35  
0.2  
V
V
5.2  
Sourcing  
VO = 0V  
20  
18  
mA  
mA  
Sinking  
VO = 5V  
25  
21  
50  
(1) All limits are guaranteed by testing or statistical analysis.  
(2) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary  
over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on  
shipped production material.  
4
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Product Folder Links: LMV712-N  
LMV712-N  
www.ti.com  
SNOS534G MAY 2004REVISED MARCH 2010  
5V Electrical Characteristics (continued)  
Unless otherwise specified, all limits guaranteed for V+ = 5V, V = 0V, VCM = 2.5V and TA = 25°C and RL > 1M. Boldface  
limits apply at the temperature extremes.  
Symbol  
Parameter  
Condition  
Min  
Typ  
Max  
Units  
(1)  
(2)  
(1)  
4.92  
4.90  
4.98  
0.01  
4.85  
0.05  
RL = 10kto 2.5V  
V
V
V
0.12  
0.15  
VO  
Output Swing  
4.82  
4.80  
RL = 600to 2.5V  
0.23  
0.30  
V
VO(SD)  
IS  
Output Voltage in Shutdown  
Supply Current per Channel  
10  
200  
mV  
mA  
1.17  
1.7  
1.9  
On Mode  
0.12  
130  
130  
110  
107  
1.5  
2.0  
Shutdown Mode  
uA  
dB  
Sourcing  
RL = 10kΩ  
VO = 2.5V to 4.6V  
80  
76  
Sinking  
RL = 10kΩ  
VO = 0.4V to 2.5V  
80  
76  
dB  
dB  
dB  
AVOL  
Large Signal Voltage Gain  
Sourcing  
RL = 600Ω  
VO = 2.5V to 4.6V  
80  
76  
Sinking  
RL = 600Ω  
80  
VO = 0.4V to 2.5V  
76  
On Mode  
4.5 to 5  
0 to 0.8  
3.5 to 5  
V
V
VSD  
Shutdown Pin Voltage Range  
Shutdown Mode  
0 to 1.5  
GBWP  
SR  
Gain-Bandwidth Product  
Slew Rate  
5
5
MHz  
V/µs  
Deg  
nV/Hz  
(3)  
φm  
Phase Margin  
60  
20  
1.6  
en  
Input Referred Voltage Noise  
f = 1kHz  
4
4.6  
Turn-On Time for Shutdown  
Turn-On Time for Shutdown  
μs  
μs  
TON  
6
8
DSBGA  
(3) Number specified is the slower of the positive and negative slew rates.  
Copyright © 2004–2010, Texas Instruments Incorporated  
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SNOS534G MAY 2004REVISED MARCH 2010  
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TYPICAL PERFORMANCE CHARACTERISTICS  
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.  
Supply Current Per Channel  
Supply Current  
vs.  
vs.  
Supply Voltage  
Supply Voltage (Shutdown)  
1.5  
1.3  
0.6  
0.5  
0.4  
0.3  
0.2  
85°C  
25°C  
1.1  
0.9  
0.7  
0.5  
-40°C  
2.7 3.0  
3.5  
4.0  
4.5  
5.0  
2.7 3.0  
3.5  
4.0  
4.5  
5.0  
SUPPLY VOLTAGE (V)  
SUPPLY VOLTAGE (V)  
Figure 2.  
Figure 3.  
VOS  
vs.  
VCM  
IB  
vs.  
VCM Over Temp  
100  
10  
0
+85°C  
-200  
+70°C  
-40°C  
-400  
-600  
-800  
+50°C  
1
+25°C  
25°C  
85°C  
0°C  
-25°C  
0.1  
-1000  
-1200  
-40°C  
0.01  
0
1
2
3
4
5
0
1
2
4
5
3
V
CM  
(V)  
V
(V)  
CM  
Figure 4.  
Figure 5.  
Output Positive Swing  
vs.  
Supply Voltage, RL = 600  
Output Negative Swing  
vs.  
Supply Voltage, RL = 600Ω  
160  
100  
140  
120  
90  
80  
25°C  
25°C  
85°C  
85°C  
100  
70  
80  
60  
40  
60  
50  
40  
-40°C  
-40°C  
2.7  
2.7  
3.0  
3.5  
3.0  
3.5  
4.0  
(V)  
4.5  
5.0  
4.0  
(V)  
4.5  
5.0  
V
V
S
S
Figure 6.  
Figure 7.  
6
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LMV712-N  
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SNOS534G MAY 2004REVISED MARCH 2010  
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.  
Sourcing Current  
Sourcing Current  
vs.  
Output Voltage, VS = 5V  
vs.  
Output Voltage, VS = 2.7V  
35  
30  
25  
30  
85°C  
85°C  
25  
25°C  
20  
-40°C  
25°C  
20  
15  
10  
-40°C  
15  
10  
5
5
0
0
0
1
2
3
4
5
-0.3  
0.2  
0.7  
1.2  
FROM V (V)  
1.7  
2.2  
2.7  
+
V
(V)  
V
OUT  
OUT  
Figure 8.  
Figure 9.  
Sinking Current  
vs.  
Output Voltage, VS = 2.7V  
Sinking Current  
vs.  
Output Voltage, VS = 5V  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
70  
85°C  
85°C  
60  
50  
40  
30  
20  
10  
0
25°C  
25°C  
-40°C  
-40°C  
-10  
-10  
0
1
2
3
4
5
-0.3  
0.2  
0.7  
1.7  
2.2  
2.7  
1.2  
V
(V)  
OUT  
V
(V)  
OUT  
Figure 10.  
Figure 11.  
PSRR  
vs.  
Frequency VS = 2.7V  
PSRR  
vs.  
Frequency VS = 5V  
100  
90  
100  
90  
NEGATIVE  
80  
80  
NEGATIVE  
70  
60  
50  
40  
30  
70  
60  
50  
40  
30  
POSITIVE  
POSITIVE  
20  
10  
0
20  
10  
0
10  
100  
1k  
10k  
100k  
1M  
10  
100  
1k  
10k  
100k  
1M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 12.  
Figure 13.  
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.  
CMRR  
CMRR  
vs.  
Frequency  
vs.  
Frequency  
100  
100  
90  
V
= 2.7V  
S
90  
80  
70  
60  
50  
40  
30  
dV  
= 0.2V TO 1.2V  
CM  
80  
70  
60  
50  
40  
30  
20  
10  
0
20  
10  
0
V
= 5V  
S
dV  
= 2V TO 3V  
CM  
10  
100  
1k  
10k  
1M  
10  
100  
1k  
10k  
1M  
100k  
100k  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 14.  
Figure 15.  
Open Loop Frequency Response  
Open Loop Frequency Response  
vs.  
RL  
vs.  
RL  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
50  
40  
30  
20  
10  
0
V
= 2.7V  
S
V
= 5V  
S
R
= 10kW  
10kW  
L
600W  
R
= 600W  
600W  
L
R
= 600W  
L
90  
60  
30  
90  
60  
30  
0
0
R
L
= 10kW  
10kW  
-10  
-10  
-20  
-20  
1k  
10k  
100k  
1M  
10M  
1k  
10k  
100k  
1M  
10M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 16.  
Figure 17.  
Open Loop Frequency Response  
Open Loop Frequency Response  
vs.  
CL  
vs.  
CL  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
50  
40  
30  
20  
10  
0
V
= 2.7V  
V = 5V  
S
S
C
= 0pF  
C
= 0pF  
L
L
90  
60  
30  
0
90  
60  
30  
0
C
= 100pF  
L
C
= 100pF  
L
C
L
= 1000pF  
C
= 1000pF  
C
L
= 1000pF  
L
C
L
= 1000pF  
C
L
= 100pF  
C
L
= 100pF  
-10  
-10  
C
= 0pF  
1M  
C
L
= 0pF  
1M  
L
-20  
-20  
1k  
10k  
100k  
FREQUENCY (Hz)  
10M  
1k  
10k  
100k  
10M  
FREQUENCY (Hz)  
Figure 18.  
Figure 19.  
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SNOS534G MAY 2004REVISED MARCH 2010  
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.  
Voltage Noise  
vs.  
Frequency  
Voltage Noise  
vs.  
Frequency  
1000  
100  
10  
1000  
V
V
V
= 5V  
S
V
V
V
= 2.7V  
S
= 2.5V  
= 5V  
CM  
SD  
= 1.35V  
= 2.7V  
CM  
SD  
100  
10  
1
1
100k  
1
10  
100  
1k  
10k  
100k  
1
10  
100  
1k  
10k  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
Figure 20.  
Figure 21.  
Non-Inverting Large Signal Pulse Response, VS = 2.7V  
Non-Inverting Large Signal Pulse Response, VS = 5V  
TIME (500ns/div)  
TIME (500ns/div)  
Figure 22.  
Figure 23.  
Non-Inverting Small Signal Pulse Response, VS = 2.7V  
Non-Inverting Small Signal Pulse Response, VS = 5V  
TIME (500ns/div)  
TIME (500ns/div)  
Figure 24.  
Figure 25.  
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.  
Inverting Large Signal Pulse Response, VS = 2.7V  
Inverting Large Signal Pulse Response, VS = 5V  
TIME (500ns/div)  
TIME (500ns/div)  
Figure 26.  
Figure 27.  
Inverting Small Signal Pulse Response, VS = 2.7V  
Inverting Small Signal Pulse Response VS = 5V  
TIME (500ns/div)  
TIME (500ns/div)  
Figure 28.  
Figure 29.  
Input Common Mode Capacitance  
vs.  
Turn on Time Response VS = 5V  
VCM VS = 5V  
30  
C
TO GROUND  
CM  
28  
26  
24  
22  
20  
18  
16  
14  
12  
10  
FMEAS = 1MHz  
FOLLOWER CONFIG  
V
FOLLOWS V (V )  
IN CM  
OUT  
0
1
2
3
4
5
TIME (2µs/div)  
V
(V)  
CM  
Figure 30.  
Figure 31.  
10  
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Product Folder Links: LMV712-N  
LMV712-N  
www.ti.com  
SNOS534G MAY 2004REVISED MARCH 2010  
APPLICATION INFORMATION  
THEORY OF OPERATION  
The LMV712-N dual op amp is derived from the LMV711 single op amp. Figure 32 contains a simplified  
schematic of one channel of the LMV712-N.  
+
V
V
BIAS  
I
P
MP3  
MP4  
Q2  
Q1  
MP1  
MP2  
MN2  
-
+
IN  
IN  
CLASS AB  
CONTROL  
OUT  
MN3  
MN1  
Q3  
Q4  
Q6  
MN4  
Q5  
I
N
V
BIAS  
-
V
BIAS  
CONTROL  
SD  
Figure 32.  
Rail-to-Rail input is achieved by using in parallel, one NMOS differential pair (MN1 and MN2) and one PMOS  
differential pair (MP1 and MP2). When the common mode input voltage (VCM) is near V+, the NMOS pair is on  
and the PMOS pair is off. When VCM is near V, the NMOS pair is off and the PMOS pair is on. When VCM is  
between V+ and V, internal logic decides how much current each differential pair will get. This special logic  
ensures stable and low distortion amplifier operation within the entire common mode voltage range.  
Because both input stages have their own offset voltage (VOS) characteristic, the offset voltage of the LMV712-N  
becomes a function of VCM. VOS has a crossover point at 1.4V above V. Refer to the "VOS vs. VCM" curve in the  
Typical Performance Characteristics section. Caution should be taken in situations where input signal amplitude  
is comparable to VOS value and/or the design requires high accuracy. In these situations, it is necessary for the  
input signal to avoid the crossover point.  
The current coming out of the input differential pairs gets mirrored through two folded cascode stages (Q1, Q2,  
Q3, Q4) into the "class AB control" block. This circuitry generates voltage gain, defines the op amp's dominant  
pole and limits the maximum current flowing at the output stage. MN3 introduces a voltage level shift and acts as  
a high impedance to low impedance buffer.  
The output stage is composed of a PMOS and a NPN transistor in a common source/emitter configuration,  
delivering a rail-to-rail output excursion.  
The MN4 transistor ensures that the LMV712-N output remains near Vwhen the amplifier is in shutdown mode.  
SHUTDOWN PIN  
The LMV712-N offers independent shutdown pins for the dual amplifiers. When the shutdown pin is tied low, the  
respective amplifier shuts down and the supply current is reduced to less than 1µA. In shutdown mode, the  
amplifier's output level stays at V. In a 2.7V operation, when a voltage between 1.5V to 2.7V is applied to the  
shutdown pin, the amplifier is enabled. As the amplifier is coming out of the shutdown mode, the output  
waveform ramps up without any glitch. This is demonstrated in Figure 33.  
Copyright © 2004–2010, Texas Instruments Incorporated  
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LMV712-N  
SNOS534G MAY 2004REVISED MARCH 2010  
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TIME (2µs/div)  
Figure 33.  
A glitch-free output waveform is highly desirable in many applications, one of which is power amplifier control  
loops. In this application, the LMV712-N is used to drive the power amplifier's power control. If the LMV712-N did  
not have a smooth output ramp during turn on, it would directly cause the power amplifier to produce a glitch at  
its output. This adversely affects the performance of the system.  
To enable the amplifier, the shutdown pin must be pulled high. It should not be left floating in the event that any  
leakage current may inadvertently turn off the amplifier.  
PRINTED CIRCUIT BOARD CONSIDERATION  
To properly bypass the power supply, several locations on a printed circuit board need to be considered. A 6.8µF  
or greater tantalum capacitor should be placed at the point where the power supply for the amplifier is introduced  
onto the board. Another 0.1µF ceramic capacitor should be placed as close as possible to the power supply pin  
of the amplifier. If the amplifier is operated in a single power supply, only the V+ pin needs to be bypassed with a  
0.1µF capacitor. If the amplifier is operated in a dual power supply, both V+ and Vpins need to be bypassed.  
It is good practice to use a ground plane on a printed circuit board to provide all components with a low inductive  
ground connection.  
Surface mount components in 0805 size or smaller are recommended in the LMV712-N application circuits.  
Designers can take advantage of the DSBGA, VSSOP and WSON miniature sizes to condense board layout in  
order to save space and reduce stray capacitance.  
CAPACITIVE LOAD TOLERANCE  
The LMV712-N can directly drive 200pF in unity-gain without oscillation. The unity-gain follower is the most  
sensitive configuration to capacitive loading. Direct capacitive loading reduces the phase margin of amplifiers.  
The combination of the amplifier's output impedance and the capacitive load induces phase lag. This results in  
either an under-damped pulse response or oscillation. To drive a heavier capacitive load, Figure 34 can be used.  
Figure 34.  
In Figure 34, the isolation resistor RISO and the load capacitor CL form a pole to increase stability by adding more  
phase margin to the overall system. The desired performance depends on the value of RISO. The bigger the RISO  
resistor value, the more stable VOUT will be. But the DC accuracy is degraded when the RISO gets bigger. If there  
were a load resistor in Figure 34, the output voltage would be divided by RISO and the load resistor.  
12  
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Product Folder Links: LMV712-N  
 
LMV712-N  
www.ti.com  
SNOS534G MAY 2004REVISED MARCH 2010  
The circuit in Figure 35 is an improvement to the one in Figure 34 because it provides DC accuracy as well as  
AC stability. In this circuit, RF provides the DC accuracy by using feed-forward techniques to connect VIN to RL.  
CF and RISO serve to counteract the loss of phase margin by feeding the high frequency component of the output  
signal back to the amplifier's inverting input, thereby preserving phase margin in the overall feedback loop.  
Increased capacitive drive is possible by increasing the value of CF. This in turn will slow down the pulse  
response.  
Figure 35.  
LATCHUP  
CMOS devices tend to be susceptible to latchup due to their internal parasitic SCR (silicon controlled rectifier)  
effects. The input and output pins look similar to the gate of the SCR. There is a minimum current required to  
trigger the SCR gate lead. The LMV712-N is designed to withstand 150mA surge current on all the pins. Some  
resistive method should be used to isolate any capacitance from supplying excess current to the pins. In addition,  
like an SCR, there is a minimum holding current for any latchup mode. Limiting current to the supply pins will  
also inhibit latchup susceptibility.  
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LMV712-N  
SNOS534G MAY 2004REVISED MARCH 2010  
www.ti.com  
CONNECTION DIAGRAMS  
*Connect thermal pad to V-or leave floating  
1
+
10  
9
+
OUT A  
-IN A  
1
2
3
V
OUT A  
-IN A  
10  
9
V
2
3
OUT B  
OUT B  
-
-
+
+
8
7
-
-
+
+
+IN A  
+IN A  
-IN B  
+IN B  
SD B  
8
7
6
-IN B  
+IN B  
SD B  
-
4
5
-
V
V
4
5
-
6
SD A  
SD A  
Figure 36. 10-Pin VSSOP (Top View)  
Figure 37. 10-Pin WSON (Top View)  
A2  
+
A2  
+
V
V
A1  
OUT  
A
A3  
OUTB  
A3  
OUTB  
A1  
OUT  
A
B
B
B1  
-INA  
B1  
-INA  
3
3
-INB  
-INB  
C
C1  
+INA  
C1  
+INA  
C3  
+INB  
3
+INB  
D3  
SDB  
D1  
SDA  
D1  
SDA  
D3  
SDB  
-
-
V
V
D2  
D2  
Figure 38. 10-Bump DSBGA (Top View)  
Figure 39. 10-Bump DSBGA (Bottom View)  
14  
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Product Folder Links: LMV712-N  
PACKAGE OPTION ADDENDUM  
www.ti.com  
7-Oct-2013  
PACKAGING INFORMATION  
Orderable Device  
LMV712LD/NOPB  
LMV712LDX/NOPB  
Status Package Type Package Pins Package  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
-40 to 85  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
ACTIVE  
WSON  
WSON  
NGY  
10  
10  
1000  
Green (RoHS  
& no Sb/Br)  
CU SN  
CU SN  
Level-3-260C-168 HR  
A62  
A62  
ACTIVE  
NGY  
4500  
Green (RoHS  
& no Sb/Br)  
Level-3-260C-168 HR  
-40 to 85  
LMV712MM  
ACTIVE  
ACTIVE  
VSSOP  
VSSOP  
DGS  
DGS  
10  
10  
1000  
1000  
TBD  
Call TI  
CU SN  
Call TI  
-40 to 85  
-40 to 85  
A61  
A61  
LMV712MM/NOPB  
Green (RoHS  
& no Sb/Br)  
Level-1-260C-UNLIM  
LMV712MMX  
ACTIVE  
ACTIVE  
VSSOP  
VSSOP  
DGS  
DGS  
10  
10  
3500  
3500  
TBD  
Call TI  
CU SN  
Call TI  
-40 to 85  
-40 to 85  
A61  
A61  
LMV712MMX/NOPB  
Green (RoHS  
& no Sb/Br)  
Level-1-260C-UNLIM  
LMV712TL/NOPB  
LMV712TLX/NOPB  
ACTIVE  
ACTIVE  
DSBGA  
DSBGA  
YPA  
YPA  
10  
10  
250  
Green (RoHS  
& no Sb/Br)  
SNAGCU  
SNAGCU  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
-40 to 85  
-40 to 85  
AU2A  
AU2A  
3000  
Green (RoHS  
& no Sb/Br)  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability  
information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that  
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight  
in homogeneous material)  
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
7-Oct-2013  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
23-Sep-2013  
TAPE AND REEL INFORMATION  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
LMV712LD/NOPB  
LMV712LDX/NOPB  
LMV712MM  
WSON  
WSON  
VSSOP  
VSSOP  
VSSOP  
VSSOP  
DSBGA  
DSBGA  
NGY  
NGY  
DGS  
DGS  
DGS  
DGS  
YPA  
YPA  
10  
10  
10  
10  
10  
10  
10  
10  
1000  
4500  
1000  
1000  
3500  
3500  
250  
178.0  
330.0  
178.0  
178.0  
330.0  
330.0  
178.0  
178.0  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
8.4  
3.3  
3.3  
3.3  
3.3  
1.0  
1.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
4.0  
4.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
8.0  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
5.3  
3.4  
1.4  
LMV712MM/NOPB  
LMV712MMX  
5.3  
3.4  
1.4  
5.3  
3.4  
1.4  
LMV712MMX/NOPB  
LMV712TL/NOPB  
LMV712TLX/NOPB  
5.3  
3.4  
1.4  
1.68  
1.68  
2.13  
2.13  
0.76  
0.76  
3000  
8.4  
8.0  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
23-Sep-2013  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
LMV712LD/NOPB  
LMV712LDX/NOPB  
LMV712MM  
WSON  
WSON  
VSSOP  
VSSOP  
VSSOP  
VSSOP  
DSBGA  
DSBGA  
NGY  
NGY  
DGS  
DGS  
DGS  
DGS  
YPA  
YPA  
10  
10  
10  
10  
10  
10  
10  
10  
1000  
4500  
1000  
1000  
3500  
3500  
250  
213.0  
367.0  
210.0  
210.0  
367.0  
367.0  
210.0  
210.0  
191.0  
367.0  
185.0  
185.0  
367.0  
367.0  
185.0  
185.0  
55.0  
35.0  
35.0  
35.0  
35.0  
35.0  
35.0  
35.0  
LMV712MM/NOPB  
LMV712MMX  
LMV712MMX/NOPB  
LMV712TL/NOPB  
LMV712TLX/NOPB  
3000  
Pack Materials-Page 2  
MECHANICAL DATA  
NGY0010A  
LDA10A (Rev B)  
www.ti.com  
MECHANICAL DATA  
YPA0010  
0.600  
±0.075  
D
E
TLP10XXX (Rev D)  
D: Max = 2.048 mm, Min =1.987 mm  
E: Max = 1.565 mm, Min =1.504 mm  
4215069/A  
12/12  
A. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994.  
B. This drawing is subject to change without notice.  
NOTES:  
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