TI LMV715-N Lmv710-n/lmv711/lmv715 low power, rrio operational amplifiers with high output Datasheet

LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
LMV710-N/LMV711/LMV715 Low Power, RRIO Operational Amplifiers with High Output
Current Drive and Shutdown Option
Check for Samples: LMV710-N, LMV711-N, LMV715-N
FEATURES
DESCRIPTION
•
The LMV710-N/LMV711/LMV715 are BiCMOS
operational amplifiers with a CMOS input stage.
These devices have greater than RR input common
mode voltage range, rail-to-rail output and high output
current drive. They offer a bandwidth of 5 MHz and a
slew rate of 5 V/µs.
1
2
•
•
•
•
•
•
•
•
•
•
•
(For 5V Supply, Typical Unless Otherwise
Noted)
Low Offset Voltage 3 mV, Max
Gain-Bandwidth Product 5 MHz, Typ
Slew Rate 5 V/µs, Typ
Space Saving Packages 5-Pin and 6-Pin SOT23
Turn on Time from Shutdown <10 µs
Industrial Temperature Range −40°C to +85°C
Supply current in Shutdown Mode 0.2 µA, typ
Ensured 2.7V and 5V Performance
Unity Gain Stable
Rail-to-Rail Input and Output
Capable of Driving 600Ω Load
APPLICATIONS
•
•
•
•
•
•
•
Wireless Phones
GSM/TDMA/CDMA Power Amp Control
AGC, RF Power Detector
Temperature Compensation
Wireless LAN
Bluetooth
HomeRF
On the LMV711/LMV715, a separate shutdown pin
can be used to disable the device and reduces the
supply current to 0.2 µA (typical). They also feature a
turn on time of less than 10 µs. It is an ideal solution
for power sensitive applications, such as cellular
phone, pager, palm computer, etc. In addition, once
the LMV715 is in shutdown the output will be “Tristated”.
The LMV710-N is offered in the space saving 5-Pin
SOT-23 Tiny package. The LMV711/LMV715 are
offered in the space saving 6-Pin SOT-23 Tiny
package.
The LMV710-N/LMV711/LMV715 are designed to
meet the demands of low power, low cost, and small
size required by cellular phones and similar battery
powered portable electronics.
Typical Application
Figure 1. High Side Current Sensing
1
2
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.
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 © 2000–2013, Texas Instruments Incorporated
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
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.
Absolute Maximum Ratings
ESD Tolerance
(1) (2)
(3)
Machine Model
100V
Human Body Model
2000V
Differential Input Voltage
± Supply Voltage
(V+) + 0.4V
(V−) − 0.4V
Voltage at Input/Output Pin
Supply Voltage (V+ - V −)
5.5V
Output Short Circuit to V+
(4)
−
(5)
Output Short Circuit to V
Current at Input Pin
± 10 mA
Mounting Temp.
Infrared or Convection (20 sec)
235°C
−65°C to 150°C
Storage Temperature Range
Junction Temperature (TJMAX)
150°C
(6)
(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 ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
Human body model, 1.5 kΩ in series with 100 pF. Machine model, 0Ω in series with 100 pF.
Shorting circuit output to V+ will adversely affect reliability.
Shorting circuit output to V− will adversely affect reliability.
The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient
temperature is PD = (TJ(MAX) - T A)/θJA. All numbers apply for packages soldered directly into a PC board.
(2)
(3)
(4)
(5)
(6)
Operating Ratings
(1)
Supply Voltage
2.7V to 5.0V
−40°C to 85°C
Temperature Range
Thermal Resistance (θJA)
DBV0005A package, 5-Pin SOT-23
265 °C/W
DBV0006A package, 6-Pin SOT-23
(1)
265 °C/W
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 ensured. For ensured specifications and the test
conditions, see the Electrical Characteristics.
2.7V Electrical Characteristics
Unless otherwise specified, all limits ensured for TJ = 25°C. V+ = 2.7V, V − = 0V, VCM = 1.35V and RL > 1 MΩ. Boldface limits
apply at the temperature extremes.
Parameter
VOS
Input Offset Voltage
IB
Input Bias Current
CMRR
PSRR
(1)
(2)
2
Test Conditions
Typ
(1)
Limits
3
3.2
(2)
Units
VCM = 0.85V and VCM = 1.85V
0.4
Common Mode Rejection Ratio
0 ≤ VCM ≤ 2.7V
75
50
45
dB
min
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V,
VCM = 0.85V
110
70
68
dB
min
2.7V ≤ V+ ≤ 5V,
VCM = 1.85V
95
70
68
dB
min
4
mV
max
pA
Typical values represent the most likely parametric norm.
All limits are specified by testing or statistical analysis.
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
2.7V Electrical Characteristics (continued)
Unless otherwise specified, all limits ensured for TJ = 25°C. V+ = 2.7V, V − = 0V, VCM = 1.35V and RL > 1 MΩ. Boldface limits
apply at the temperature extremes.
Parameter
VCM
Test Conditions
Input Common-Mode Voltage Range
ISC
Output Short Circuit Current
VO
Output Swing
For CMRR ≥ 50 dB
Typ
(1)
Limits
(2)
Units
-0.3
-0.2
3
2.9
Sourcing
VO = 0V
28
15
12
mA
min
Sinking
VO = 2.7V
40
25
22
mA
min
2.68
2.62
2.60
V
min
0.01
0.12
0.15
V
max
2.55
2.52
2.50
V
min
0.05
0.23
0.30
V
max
200
mV
RL = 10 kΩ to 1.35V
RL = 600Ω to 1.35V
V
VO (SD)
Output Voltage Level in
Shutdown Mode (LMV711 only)
50
IO (SD)
Output Leakage Current in
Shutdown Mode (LMV715 Only)
1
pA
CO (SD)
Output Capacitance in
Shutdown Mode (LMV715 Only)
32
pF
IS
Supply Current
AV
Large Signal Voltage
On Mode
1.22
1.7
1.9
mA
max
Shutdown Mode, VSD = 0V
0.002
10
µA
Sourcing
RL = 10 kΩ
VO = 1.35V to 2.3V
115
80
76
dB
min
Sinking
RL = 10 kΩ
VO = 0.4V to 1.35V
113
80
76
dB
min
Sourcing
RL = 600Ω
VO = 1.35V to 2.2V
110
80
76
dB
min
Sinking
RL = 600Ω
VO = 0.5V to 1.35V
100
80
76
dB
min
(3)
SR
Slew Rate
5
V/µs
GBWP
Gain-Bandwidth Product
5
MHz
φm
Phase Margin
60
Deg
TON
Turn-on Time from Shutdown
VSD
Shutdown Pin Voltage Range
<10
On Mode
Shutdown Mode
en
(3)
Input-Referred Voltage Noise
f = 1 kHz
µs
1.5 to 2.7
2.4 to 2.7
V
0 to 1
0 to 0.8
V
20
nV/√Hz
Number specified is the slower of the positive and negative slew rates.
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
3
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
3.2V Electrical Characteristics
Unless otherwise specified, all limits ensured for TJ = 25°C. V+ = 3.2V, V− = 0V, VCM = 1.6V. Boldface limits apply at the
temperature extremes.
Parameter
VO
(1)
(2)
Test Conditions
Output Swing
Typ
IO = 6.5 mA
(1)
Limit
(2)
Units
3.0
2.95
2.92
V
min
0.01
0.18
0.25
V
max
Typical values represent the most likely parametric norm.
All limits are specified by testing or statistical analysis.
5V Electrical Characteristics
Unless otherwise specified, all limits ensured for TJ = 25°C. V+ = 5V, V − = 0V, VCM = 2.5V, and RL > 1 MΩ. Boldface limits
apply at the temperature extremes.
Parameter
VOS
Input Offset Voltage
IB
Input Bias Current
CMRR
PSRR
VCM
Test Conditions
Limits
3
3.2
(2)
Units
0.4
Common Mode Rejection Ratio
0V ≤ VCM ≤ 5V
70
50
48
dB
min
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V,
VCM = 0.85V
110
70
68
dB
min
2.7V ≤ V+ ≤ 5V,
VCM = 1.85V
95
70
68
dB
min
-0.3
−0.2
5.3
5.2
Sourcing
VO = 0V
35
25
21
mA
min
Sinking
VO = 5V
40
25
21
mA
min
4.98
4.92
4.90
V
min
0.01
0.12
0.15
V
max
4.85
4.82
4.80
V
min
0.05
0.23
0.3
V
max
200
mV
4
Output Short Circuit Current
VO
(1)
VCM = 0.85V and VCM = 1.85V
Input Common-Mode Voltage Range
ISC
Typ
Output Swing
For CMRR ≥ 50 dB
RL = 10 kΩ to 2.5V
RL = 600Ω to 2.5V
mV
max
pA
V
VO (SD)
Output Voltage Level in
Shutdown Mode (LMV711 only)
50
IO (SD)
Output Leakage Current in
Shutdown Mode (LMV715 Only)
1
pA
CO (SD)
Output Capacitance in
shutdown Mode (LMV715 Only)
32
pF
IS
Supply Current
(1)
(2)
4
On Mode
1.17
1.7
1.9
mA
max
Shutdown Mode
0.2
10
µA
Typical values represent the most likely parametric norm.
All limits are specified by testing or statistical analysis.
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
5V Electrical Characteristics (continued)
Unless otherwise specified, all limits ensured for TJ = 25°C. V+ = 5V, V − = 0V, VCM = 2.5V, and RL > 1 MΩ. Boldface limits
apply at the temperature extremes.
Parameter
AV
Test Conditions
Large Signal Voltage Gain
Slew Rate
GBWP
φm
TON
Turn-on Time from Shutdown
VSD
Shutdown Pin Voltage Range
(3)
Limits
(2)
Units
123
80
76
dB
min
Sinking
RL = 10 kΩ
VO = 0.4V to 2.5V
120
80
76
dB
min
Sourcing
RL = 600Ω
VO = 2.5V to 4.5V
110
80
76
dB
min
Sinking
RL = 600Ω
VO = 0.5V to 2.5V
118
80
76
dB
min
5
V/µs
Gain-Bandwidth Product
5
MHz
Phase Margin
60
Deg
<10
µs
On Mode
Shutdown Mode
en
(1)
Sourcing
RL = 10 kΩ
VO = 2.5V to 4.6V
(3)
SR
Typ
Input-Referred Voltage Noise
f = 1 kHz
2 to 5
2.4 to 5
0 to 1.5
0 to 0.8
20
V
nV/√Hz
Number specified is the slower of the positive and negative slew rates.
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
5
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
Typical Performance Characteristics
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
6
Supply Current
vs.
Supply Voltage (On Mode)
LMV711/LMV715 Supply Current vs.
Supply Voltage (Shutdown Mode)
Figure 2.
Figure 3.
Output Positive Swing
vs.
Supply Voltage
Output Negative Swing
vs.
Supply Voltage
Figure 4.
Figure 5.
Output Positive Swing
vs.
Supply Voltage
Output Negative Swing
vs.
Supply Voltage
Figure 6.
Figure 7.
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
Output Positive Swing
vs.
Supply Voltage
Output Negative Swing
vs.
Supply Voltage
Figure 8.
Figure 9.
Input Voltage Noise
vs.
Frequency
PSRR
vs.
Frequency
Figure 10.
Figure 11.
CMRR
vs.
Frequency
LMV711/LMV715 Turn On Characteristics
Figure 12.
Figure 13.
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
7
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
8
Sourcing Current
vs.
Output Voltage
Sinking Current
vs.
Output Voltage
Figure 14.
Figure 15.
THD+N
vs.
Frequency (VS = 5V)
THD+N
vs.
Frequency (VS = 2.7V)
Figure 16.
Figure 17.
THD+N
vs.
VOUT
THD+N
vs.
VOUT
Figure 18.
Figure 19.
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
CCM
vs.
VCM
CCM
vs.
VCM
Figure 20.
Figure 21.
CDIFF
vs.
VCM (VS = 2.7V)
CDIFF
vs.
VCM (VS = 5V)
Figure 22.
Figure 23.
Open Loop Frequency Response
Open Loop Frequency Response
Figure 24.
Figure 25.
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
9
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
Typical Performance Characteristics (continued)
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
10
Open Loop Frequency Response
Open Loop Frequency Response
Figure 26.
Figure 27.
Open Loop Frequency Response
Open Loop Frequency Response
Figure 28.
Figure 29.
Non-Inverting Large Signal Pulse Response
Non-Inverting Small Signal Pulse Response
Figure 30.
Figure 31.
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, VS = +5V, single supply, TA = 25°C.
Inverting Large Signal Pulse Response
Inverting Small Signal Pulse Response
Figure 32.
Figure 33.
VOS
vs.
VCM
VOS
vs.
VCM
Figure 34.
Figure 35.
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
11
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
APPLICATION INFORMATION
Supply Bypassing
The application circuits in this datasheet do not show the power supply connections and the associated bypass
capacitors for simplification. When the circuits are built, it is always required to have bypass capacitors. Ceramic
disc capacitors (0.1 µF) or solid tantalum (1 µF) with short leads, and located close to the IC are usually
necessary to prevent interstage coupling through the power supply internal impedance. Inadequate bypassing
will manifest itself by a low frequency oscillation or by high frequency instabilities. Sometimes, a 10 µF (or larger)
capacitor is used to absorb low frequency variations and a smaller 0.1 µF disc is paralleled across it to prevent
any high frequency feedback through the power supply lines.
Shutdown Mode
The LMV711/LMV715 have a shutdown pin. To conserve battery life in portable applications, they can be
disabled when the shutdown pin voltage is pulled low. For LMV711 during shutdown mode, the output stays at
about 50 mV from the lower rail, and the current drawn from the power supply is 0.2 µA (typical). This makes the
LMV711 an ideal solution for power sensitive applications. For the LMV715 during shutdown mode, the output
will be “Tri-stated”.
The shutdown pin should never be left unconnected. In applications where shutdown operation is not needed
and the LMV711 or LMV715 is used, the shutdown pin should be connected to V+. Leaving the shutdown pin
floating will result in an undefined operation mode and the device may oscillate between shutdown and active
modes.
Rail-to-Rail Input
The rail-to-rail input is achieved by using paralleled PMOS and NMOS differential input stages. (See Simplified
Schematic in this datasheet). When the common mode input voltage changes from ground to the positive rail, the
input stage goes through three modes. First, the NMOS pair is cutoff and the PMOS pair is active. At around
1.4V, both PMOS and NMOS pairs operate, and finally the PMOS pair is cutoff and NMOS pair is active. Since
both input stages have their own offset voltage (VOS), the offset of the amplifier becomes a function of the
common-mode input voltage. See curves for VOS vs. VCM in Typical Performance Characteristics section.
As shown in the curve, the VOS has a crossover point at 1.4V above V−. Proper design must be done in both DC
and AC coupled applications to avoid problems. For large input signals that include the VOS crossover point in
their dynamic range, it will cause distortion in the output signal. One way to avoid such distortion is to keep the
signal away from the crossover point. For example, in a unity gain buffer configuration and with VS = 5V, a 3V
peak-to-peak signal center at 2.5V will contain input-crossover distortion. To avoid this, the input signal should be
centered at 3.5V instead. Another way to avoid large signal distortion is to use a gain of −1 circuit which avoids
any voltage excursions at the input terminals of the amplifier. See Figure 36. In this circuit, the common mode
DC voltage (VCM) can be set at a level away from the VOS crossover point.
Figure 36.
When the input is a small signal and this small signal falls inside the VOS transition range, the gain, CMRR and
some other parameters will be degraded. To resolve this problem, the small signal should be placed such that it
avoids the VOS crossover point.
To achieve maximum output swing, the output should be biased at mid-supply. This is normally done by biasing
the input at mid-supply. But with supply voltage range from 2V to 3.4V, the input of the op amp should not be
biased at mid-supply because of the transition of the VOS. Figure 37 shows an example of how to get away from
the VOS crossover point and maintain a maximum swing with a 2.7V supply. Figure 38 shows the waveforms of
VIN and VOUT.
12
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Figure 37.
Figure 38.
The inputs can be driven 300 mV beyond the supply rails without causing phase reversal at the output. However,
the inputs should not be allowed to exceed the maximum ratings.
Compensation of Input Capacitance
In the application (Figure 39) where a large feedback resistor is used, the feedback resistor can react with the
input capacitance of the op amp and introduce an additional pole to the close loop frequency response.
Figure 39. Cancelling the Effect of Input Capacitance
This pole occurs at frequency fp , where
(1)
Any stray capacitance due to external circuit board layout, any source capacitance from transducer or
photodiode connected to the summing node will also be added to the input capacitance. If fp is less than or close
to the unity-gain bandwidth (5 MHz) of the op amp, the phase margin of the loop is reduced and can cause the
system to be unstable.
To avoid this problem, make sure that fp occurs at least 2 octaves beyond the expected −3 dB frequency corner
of the close loop frequency response. If not, a feedback capacitor CF can be placed in parallel with RF such that
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
13
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
(2)
The paralleled RF and CF introduce a zero, which cancels the effect from the pole.
Capacitive Load Tolerance
The LMV710-N/LMV711/ LMV715 can directly drive 200 pF 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 underdamped pulse response or oscillation. To drive a heavier capacitive load,
circuit in Figure 40 can be used.
Figure 40. Indirectly Driving A Capacitive Load using Resistive Isolation
In Figure 40, 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 not great when the RISO gets bigger. If there
were a load resistor in Figure 40, the output would be voltage divided by RISO and the load resistor.
The circuit in Figure 41 is an improvement to the one in Figure 40 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 41. Indirectly Driving A Capacitive A Load with DC Accuracy
Application Circuits
Peak Detector
Peak detectors are used in many applications, such as test equipment, measurement instrumentation, ultrasonic
alarm systems, etc. Figure 42 shows the schematic diagram of a peak detector using LMV710-N or LMV711 or
LMV715. This peak detector basically consists of a clipper, a parallel RC network, and a voltage follower.
14
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Figure 42. Peak Detector
The capacitor C1 is first discharged by applying a positive pulse to the reset transistor. When a positive voltage
VIN is applied to the input, the input voltage is higher than the voltage across C1. The output of the op amp goes
high and forward biases the diode D1. The capacitor C1 is charged to VIN. When the input becomes less than the
current capacitor voltage, the output of the op amp A1 goes low and the diode D1 is reverse biased. This isolates
the C1 and leaves it with the charge equivalent to the peak of the input voltage. The follower prevents
unintentional discharging of C1 by loading from the following circuit.
R5 and C1 are properly selected so that the capacitor is charged rapidly to VIN. During the holding period, the
capacitor slowly discharge through C1, via leakage of the capacitor and the reverse-biased diode, or op amp bias
currents. In any cases the discharging time constant is much larger than the charge time constant. And the
capacitor can hold its voltage long enough to minimize the output ripple.
Resistors R2 and R3 limit the current into the inverting input of A1 and the non-inverting input of A2 when power
is disconnected from the circuit. The discharging current from C1 during power off may damage the input circuitry
of the op amps.
The peak detector can be reset by applying a positive pulse to the reset transistor. The charge on the capacitor
is dumped into ground, and the detector is ready for another cycle.
The maximum input voltage to this detector should be less than (V+ - VD), where VD is the forward voltage drop
of the diode. Otherwise, the input voltage should be scaled down before applying to the circuit.
High Side Current Sensing
The high side current sensing circuit (Figure 43) is commonly used in a battery charger to monitor charging
current to prevent over-charging. A sense resistor RSENSE is connected to the battery directly. This system
requires an op amp with rail-to-rail input. The LMV710-N/LMV711/LMV715 are ideal for this application because
its common mode input range can go beyond the positive rail.
Figure 43. High Side Current Sensing
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
15
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
Figure 44. Typical of GSM P.A. Control Loop
GSM Power Amplifier Control Loop
There are four critical sections in the GSM Power Amplifier Control Loop. The class-C RF power amplifier
provides amplification of the RF signal. A directional coupler couples small amount of RF energy from the output
of the RF P. A. to an envelope detector diode. The detector diode senses the signal level and rectifies it to a DC
level to indicate the signal strength at the antenna. An op amp is used as an error amplifier to process the diode
voltage and ramping voltage. This loop control the power amplifier gain via the op amp and forces the detector
diode voltage and ramping voltage to be equal. Power control is accomplished by changing the ramping voltage.
The LMV710-N/LMV711/LMV715 are well suited as an error amplifier in this application. The LMV711/LMV715
have an extra shutdown pin to switch the op amp to shutdown mode. In shutdown mode, the LMV711/LMV715
consume very low current. The LMV711 provides a ground voltage to the power amplifier control pin VPC.
Therefore, the power amplifier can be turned off to save battery life. The LMV715 output will be “tri-stated” when
in shutdown.
Simplified Schematic
Figure 45. LMV711
16
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
LMV710-N, LMV711-N, LMV715-N
www.ti.com
SNOS519J – APRIL 2000 – REVISED MARCH 2013
Connection Diagrams
LMV710-N
Top View
Figure 46. 5-Pin SOT-23 Package
See Package Number DBV0005A
LMV711 and LMV715
Top View
Figure 47. 6-Pin SOT-23 Package
See Package Number DBV0006A
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
Submit Documentation Feedback
17
LMV710-N, LMV711-N, LMV715-N
SNOS519J – APRIL 2000 – REVISED MARCH 2013
www.ti.com
REVISION HISTORY
Changes from Revision I (March 2013) to Revision J
•
18
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 17
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LMV710-N LMV711-N LMV715-N
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
LMV710M5
NRND
SOT-23
DBV
5
1000
TBD
Call TI
Call TI
-40 to 85
A48A
LMV710M5/NOPB
ACTIVE
SOT-23
DBV
5
1000
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 85
A48A
LMV710M5X
NRND
SOT-23
DBV
5
3000
TBD
Call TI
Call TI
-40 to 85
A48A
LMV710M5X/NOPB
ACTIVE
SOT-23
DBV
5
3000
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 85
A48A
(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.
(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.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
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
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
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
26-Mar-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
LMV710M5
SOT-23
DBV
5
1000
178.0
8.4
LMV710M5/NOPB
SOT-23
DBV
5
1000
178.0
LMV710M5X
SOT-23
DBV
5
3000
178.0
LMV710M5X/NOPB
SOT-23
DBV
5
3000
178.0
3.2
3.2
1.4
4.0
8.0
Q3
8.4
3.2
3.2
1.4
4.0
8.0
Q3
8.4
3.2
3.2
1.4
4.0
8.0
Q3
8.4
3.2
3.2
1.4
4.0
8.0
Q3
Pack Materials-Page 1
W
Pin1
(mm) Quadrant
PACKAGE MATERIALS INFORMATION
www.ti.com
26-Mar-2013
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
LMV710M5
SOT-23
DBV
5
1000
210.0
185.0
35.0
LMV710M5/NOPB
SOT-23
DBV
5
1000
210.0
185.0
35.0
LMV710M5X
SOT-23
DBV
5
3000
210.0
185.0
35.0
LMV710M5X/NOPB
SOT-23
DBV
5
3000
210.0
185.0
35.0
Pack Materials-Page 2
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
Automotive and Transportation
www.ti.com/automotive
Amplifiers
amplifier.ti.com
Communications and Telecom
www.ti.com/communications
Data Converters
dataconverter.ti.com
Computers and Peripherals
www.ti.com/computers
DLP® Products
www.dlp.com
Consumer Electronics
www.ti.com/consumer-apps
DSP
dsp.ti.com
Energy and Lighting
www.ti.com/energy
Clocks and Timers
www.ti.com/clocks
Industrial
www.ti.com/industrial
Interface
interface.ti.com
Medical
www.ti.com/medical
Logic
logic.ti.com
Security
www.ti.com/security
Power Mgmt
power.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Microcontrollers
microcontroller.ti.com
Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
OMAP Applications Processors
www.ti.com/omap
TI E2E Community
e2e.ti.com
Wireless Connectivity
www.ti.com/wirelessconnectivity
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2013, Texas Instruments Incorporated