LMV321 [HMSEMI]
1MHZ CMOS Rail-to-Rail IO Opamp with RF Filter;
| 型号： | LMV321 |
| 厂家： | 
H&M Semiconductor |
| 描述： | 1MHZ CMOS Rail-to-Rail IO Opamp with RF Filter |
| 文件： | 总16页 (文件大小：1404K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LMV321/358/324
1MHZ CMOS Rail-to-Rail IO Opamp with RF Filter
Features
•
•
•
•
•
•
•
•
Single-Supply Operation from +2.1V ~ +5.5V
•
Small Package:
Rail-to-Rail Input / Output
LMV321 Available in SOT23-5 and SC70-5 Packages
Gain-Bandwidth Product: 1MHz (Typ.)
Low Input Bias Current: 1pA (Typ.)
Low Offset Voltage: 3.5mV (Max.)
Quiescent Current: 40µA per Amplifier (Typ.)
Operating Temperature: -40°C ~ +125°C
Embedded RF Anti-EMI Filter
LMV358 Available in SOP-8, MSOP-8, DIP-8 and DFN-8
Packages
LMV324 Available in SOP-14 and TSSOP-14 Packages
General Description
The LMV321 family have a high gain-bandwidth product of 1MHz, a slew rate of 0.6V/ s, and a quiescent current of 40
A/amplifier at 5V. The LMV321 family is designed to provide optimal performance in low voltage and low noise systems. They
provide rail-to-rail output swing into heavy loads. The input common mode voltage range includes ground, and the maximum
input offset voltage is 3.5mV for LMV321 family. They are specified over the extended industrial temperature range (-40 to
+125 ). The operating range is from 2.1V to 5.5V. The LMV321 single is available in Green SC70-5 and SOT-23-5 packages.
The LMV358 Dual is available in Green SOP-8, MSOP-8, DIP-8 and DFN-8 packages. The LMV324 Quad is available in Green
SOP-14 and TSSOP-14 packages.
Applications
•
•
•
•
ASIC Input or Output Amplifier
Sensor Interface
•
•
•
•
Audio Output
Piezoelectric Transducer Amplifier
Medical Instrumentation
Portable Systems
Medical Communication
Smoke Detectors
Pin Configuration
LMV321Y
LMV321
1
2
3
OUT
VSS
IN+
5
4
VDD
IN-
SOT23-5/SC70-5
SOT23-5/SC70-5
LMV324
LMV358
LMV358
Figure 1. Pin Assignment Diagram
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LMV321/358/324
Absolute Maximum Ratings
Condition
Power Supply Voltage (VDD to Vss)
Analog Input Voltage (IN+ or IN-)
PDB Input Voltage
Min
-0.5V
Max
+7.5V
Vss-0.5V
Vss-0.5V
-40°C
VDD+0.5V
+7V
Operating Temperature Range
Junction Temperature
+125°C
+160°C
Storage Temperature Range
Lead Temperature (soldering, 10sec)
-55°C
+150°C
+260°C
Package Thermal Resistance (TA=+25
)
SOP-8, θJA
MSOP-8, θJA
SOT23-5, θJA
SC70-5, θJA
ESD Susceptibility
HBM
125°C/W
216°C/W
190°C/W
333°C/W
6KV
MM
300V
Note: Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational
sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect
reliability.
Package/Ordering Information
PACKAGE
PACKAGE
OPTION
MARKING
MODEL
CHANNEL
ORDER NUMBER
DESCRIPTION
INFORMATION
LMV321-UR
LMV321-MR
LMV321Y-UR
LMV321Y-MR
LMV358-SR
LMV358-MR
LMV358-PR
LMV358-DR
LMV324-TR
LMV324-SR
SC70-5
SOT23-5
SC70-5
SOT23-5
SOP-8
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,4000
Tape and Reel,3000
20Tube(1000pcs)
321
321
LMV321
Single
321Y
321Y
LMV358
LMV358
LMV358
LMV358
LMV324
LMV324
MSOP-8
DIP-8
LMV358
LMV324
Dual
DFN-8
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,2500
TSSOP-14
SOP-14
Quad
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LMV321/358/324
Electrical Characteristics
(At VS = +5V, RL = 100kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.)
LMV321/358/324
PARAMETER
SYMBOL
CONDITIONS
TYP
+25
MIN/MAX OVER TEMPERATURE
UNITS
MIN/MAX
+25
-40 to +85
INPUT CHARACTERISTICS
Input Offset Voltage
VOS
IB
IOS
VCM
VCM = VS/2
0.4
3.5
5.6
mV
pA
pA
V
MAX
TYP
TYP
TYP
Input Bias Current
1
Input Offset Current
1
Common-Mode Voltage Range
VS = 5.5V
-0.1 to +5.6
VS = 5.5V, VCM = -0.1V to 4V
VS = 5.5V, VCM = -0.1V to 5.6V
RL = 5kΩ, VO = +0.1V to +4.9V
RL = 10kΩ, VO = +0.1V to +4.9V
70
68
62
56
70
94
62
55
70
85
dB
Common-Mode Rejection Ratio CMRR
MIN
80
dB
Open-Loop Voltage Gain
AOL
MIN
TYP
100
2.7
Input Offset Voltage Drift
∆VOS/∆T
µV/
OUTPUT CHARACTERISTICS
VOH
VOL
RL = 100kΩ
RL = 100kΩ
RL = 10kΩ
RL = 10kΩ
4.997
3
4.990
10
4.980
20
V
MIN
MAX
MIN
mV
V
Output Voltage Swing from Rail
VOH
4.992
8
4.970
30
4.960
40
VOL
mV
MAX
ISOURCE
ISINK
84
60
45
Output Current
RL = 10Ω to VS/2
mA
MIN
75
60
45
POWER SUPPLY
Operating Voltage Range
2.1
5.5
60
2.5
5.5
58
V
V
MIN
MAX
MIN
Power Supply Rejection Ratio
Quiescent Current / Amplifier
PSRR
IQ
VS = +2.5V to +5.5V, VCM = +0.5V
82
40
dB
µA
60
80
MAX
DYNAMIC PERFORMANCE (CL = 100pF)
Gain-Bandwidth Product
Slew Rate
GBP
SR
tS
1
MHz
V/µs
µs
TYP
TYP
TYP
TYP
G = +1, 2V Output Step
G = +1, 2V Output Step
VIN ·Gain = VS
0.6
5
Settling Time to 0.1%
Overload Recovery Time
NOISE PERFORMANCE
2.6
µs
f = 1kHz
27
20
nV / Hz
nV / Hz
TYP
TYP
Voltage Noise Density
en
f = 10kHz
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LMV321/358/324
Typical Performance characteristics
At TA=+25oC, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted.
Large-Signal Step Response
Small-Signal Step Response
G=+1
CL=100pF
RL=100KΩ
G=+1
CL=100pF
RL=100KΩ
Time (4ꢀs/div)
Time (2ꢀs/div)
Supply Current vs. Supply Voltage
Short-Circuit Current vs. Supply Voltage
Supply Voltage (V)
Supply Voltage (V)
Output Voltage vs. Output Current
Output Voltage vs. Output Current
Sourcing Current
Sourcing Current
Vs=5V
Vs=3V
Sinking Current
Sinking Current
Output Current (mA)
Output Current (mA)
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LMV321/358/324
Typical Performance characteristics
At TA=+25oC, VS=+5V, and RL=100KΩ connected to VS/2, unless otherwise noted.
Overload Recovery Time
Supply Current vs. Temperature
Vs=5V
G=-5
VIN=500mV
Time (2ꢀs/div)
Temperature (
)
Input Voltage Noise Spectral Density vs. Frequency
Open Loop Gain, Phase Shift vs. Frequency at +5V
Frequency (kHz)
Frequency (kHz)
CMRR vs. Frequency
PSRR vs. Frequency
Frequency (kHz)
Frequency (kHz)
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LMV321/358/324
Application Note
Size
LMV321 family series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The small
footprints of the LMV321 family packages save space on printed circuit boards and enable the design of smaller electronic
products.
Power Supply Bypassing and Board Layout
LMV321 family series operates from a single 2.1V to 5.5V supply or dual ±1.05V to ±2.75V supplies. For best performance, a
0.1µF ceramic capacitor should be placed close to the VDD pin in single supply operation. For dual supply operation, both VDD
and VSS supplies should be bypassed to ground with separate 0.1µF ceramic capacitors.
Low Supply Current
The low supply current (typical 40uA per channel) of LMV321 family will help to maximize battery life. They are ideal for battery
powered systems
Operating Voltage
LMV321 family operates under wide input supply voltage (2.1V to 5.5V). In addition, all temperature specifications apply from
-40 oC to +125 oC. Most behavior remains unchanged throughout the full operating voltage range. These guarantees ensure
operation throughout the single Li-Ion battery lifetime
Rail-to-Rail Input
The input common-mode range of LMV321 family extends 100mV beyond the supply rails (VSS-0.1V to VDD+0.1V). This is
achieved by using complementary input stage. For normal operation, inputs should be limited to this range.
Rail-to-Rail Output
Rail-to-Rail output swing provides maximum possible dynamic range at the output. This is particularly important when
operating in low supply voltages. The output voltage of LMV321 family can typically swing to less than 5mV from supply rail in
light resistive loads (>100kΩ), and 30mV of supply rail in moderate resistive loads (10kΩ).
Capacitive Load Tolerance
The LMV321 family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance will create a
pole in the amplifier’s feedback path, leading to excessive peaking and potential oscillation. If dealing with load capacitance is
a requirement of the application, the two strategies to consider are (1) using a small resistor in series with the amplifier’s output
and the load capacitance and (2) reducing the bandwidth of the amplifier’s feedback loop by increasing the overall noise gain.
Figure 2. shows a unity gain follower using the series resistor strategy. The resistor isolates the output from the capacitance
and, more importantly, creates a zero in the feedback path that compensates for the pole created by the output capacitance.
Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor
The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive load RL in parallel with the
capacitive load, a voltage divider (proportional to RISO/RL) is formed, this will result in a gain error.
The circuit in Figure 3 is an improvement to the one in Figure 2. RF provides the DC accuracy by feed-forward the VIN to RL. CF
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LMV321/358/324
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 the phase margin in the overall feedback loop. Capacitive drive can be increased
by increasing the value of CF. This in turn will slow down the pulse response.
Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy
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LMV321/358/324
Typical Application Circuits
Differential amplifier
The differential amplifier allows the subtraction of two input voltages or cancellation of a signal common the two inputs. It is useful
as a computational amplifier in making a differential to single-end conversion or in rejecting a common mode signal. Figure 4.
shown the differential amplifier using LMV321 family.
Figure 4. Differential Amplifier
V =( R1+R2 ) R4 V − R2V +( R1+R2 ) R3 V
REF
OUT
IN
IP
R3+R4 R1
R1
R3+R4 R1
If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then
R2
R1
VOUT
=
(VIP −VIN ) + VREF
Low Pass Active Filter
The low pass active filter is shown in Figure 5. The DC gain is defined by –R2/R1. The filter has a -20dB/decade roll-off after its
corner frequency ƒC=1/(2πR3C1).
Figure 5. Low Pass Active Filter
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LMV321/358/324
Instrumentation Amplifier
The triple LMV321 family can be used to build a three-op-amp instrumentation amplifier as shown in Figure 6. The amplifier in
Figure 6 is a high input impedance differential amplifier with gain of R2/R1. The two differential voltage followers assure the high
input impedance of the amplifier.
Figure 6. Instrument Amplifier
.
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LMV321/358/324
Package Information
MSOP-8
V1
10/16
LMV321/358/324
SOP-8
V1
11/16
LMV321/358/324
SOT23-5
V1
12/16
LMV321/358/324
TSSOP-14
V1
13/16
LMV321/358/324
SC70-5
V1
14/16
LMV321/358/324
SOP-14
V1
15/16
LMV321/358/324
DFN-8
V1
16/16
相关型号：
LMV321A-Q1
LMV321A-Q1, LMV358A-Q1, LMV324A-Q1 Automotive Low-Voltage Rail-to-Rail Output Operational Amplifiers
TI
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