LPV321M5 [NSC]
General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers; 通用，低电压，低功耗，轨到轨输出运算放大器
| 型号： | LPV321M5 |
| 厂家： | 
National Semiconductor |
| 描述： | General Purpose, Low Voltage, Low Power, Rail-to-Rail Output Operational Amplifiers |
| 文件： | 总21页 (文件大小：718K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
August 1999
LPV321 Single/ LPV358 Dual/ LPV324 Quad
General Purpose, Low Voltage, Low Power, Rail-to-Rail
Output Operational Amplifiers
General Description
Features
(For V+ 5V and V
=
0V, Typical Unless Otherwise Noted)
−
=
The LPV321/358/324 are low power (9µA per channel at
5.0V) versions of the LMV321/358/324 op amps. This is an-
other addition to the LMV321/358/324 family of commodity
op amps.
j
j
j
Guaranteed 2.7V and 5V Performance
No Crossover Distortion
Space Saving Package
SC70-5
The LPV321/358/324 are the most cost effective solutions
for the applications where low voltage, low power operation,
space saving and low price are needed. The
LPV321/358/324 have rail-to-rail output swing capability and
the input common-mode voltage range includes ground.
They all exhibit excellent speed-power ratio, achieving
152 KHz of bandwidth with a supply current of only 9µA.
2.0x2.1x1.0mm
−40˚C to +85˚C
152KHz
j
j
j
Industrial Temp.Range
Gain-Bandwidth Product
Low Supply Current
LPV321
9µA
15µA
28µA
The LPV321 is available in space saving SC70-5, which is
approximately half the size of SOT23-5. The small package
saves space on pc boards, and enables the design of small
portable electronic devices. It also allows the designer to
place the device closer to the signal source to reduce noise
pickup and increase signal integrity.
LPV358
LPV324
j
j
Rail-to-Rail Output Swing
100kΩ Load
V+−3.5mV
V−+90mV
−0.2V to V+ −0.8V
@
The chips are built with National’s advanced submicron
silicon-gate BiCMOS process. The LPV321/358/324 have bi-
polar input and output stages for improved noise perfor-
mance and higher output current drive.
VCM
Applications
n Active Filters
n General Purpose Low Voltage Applications
n General Purpose Portable Devices
Connection Diagrams
14-Pin SO/TSSOP
5-Pin
SC70-5/SOT23-5
DS100920-3
DS100920-1
Top View
Top View
8-Pin SO/MSOP
DS100920-2
Top View
© 1999 National Semiconductor Corporation
DS100920
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Ordering Information
Temperature Range
Package
Industrial
−40˚C to +85˚C
LPV321M7
LPV321M7X
LPV321M5
LPV321M5X
LPV358M
Packaging Marking
Transport Media
NSC Drawing
MAA05
5-Pin SC70-5
A19
A19
1k Units Tape and Reel
3k Units Tape and Reel
1k Units Tape and Reel
3k Units Tape and Reel
Rails
5-Pin SOT23-5
8-Pin Small Outline
8-Pin MSOP
A27A
MA05B
A27A
LPV358M
LPV358M
P358
M08A
MUA08A
M14A
LPV358MX
LPV358MM
LPV358MMX
LPV324M
2.5k Units Tape and Reel
1k Units Tape and Reel
3.5k Units Tape and Reel
Rails
P358
14-Pin Small Outline
14-Pin TSSOP
LPV324M
LPV324M
LPV324MT
LPV324MT
LPV324MX
LPV324MT
LPV324MTX
2.5k Units Tape and Reel
Rails
MTC14
2.5k Units Tape and Reel
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2
Absolute Maximum Ratings (Note 1)
Junction Temp. (Tj, max) (Note 5)
150˚C
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Operating Ratings (Note 1)
Supply Voltage
2.7V to 5V
ESD Tolerance (Note 2)
Temperature Range
Thermal Resistance (θ JA)(Note 10)
5-pin SC70-5
−40˚C≤T J≤85˚C
Machine Model
100V
2000V
Human Body Model
478˚C/W
265˚C/W
190˚C/W
235˚C/W
145˚C/W
155˚C/W
±
Differential Input Voltage
−
Supply Voltage
5.5V
5-pin SOT23-5
Supply Voltage (V+–V
)
8-Pin SOIC
+
−
Output Short Circuit to V
Output Short Circuit to V
Soldering Information
(Note 3)
8-Pin MSOP
(Note 4)
14-Pin SOIC
14-Pin TSSOP
Infrared or Convection (20 sec)
Storage Temp. Range
235˚C
−65˚C to 150˚C
2.7V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T = 25˚C, V+ = 2.7V, V− = 0V, VCM = 1.0V, VO = V+/2 and R
1 MΩ.
Units
>
L
J
Typ
Limit
(Note 7)
Symbol
Parameter
Conditions
(Note 6)
VOS
Input Offset Voltage
1.2
2
7
mV
max
TCVOS
IB
Input Offset Voltage Average
Drift
µV/˚C
Input Bias Current
1.7
0.6
70
50
40
nA
max
IOS
Input Offset Current
nA
max
CMRR
PSRR
VCM
Common Mode Rejection Ratio 0V ≤ VCM ≤ 1.7V
50
dB
min
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V
65
50
dB
min
=
=
VO 1V, VCM 1V
Input Common-Mode Voltage
Range
For CMRR ≥ 50dB
−0.2
1.9
V+ -3
80
0
V
min
1.7
V+ -100
180
8
V
max
VO
Output Swing
RL = 100kΩ to 1.35V
mV
min
mV
max
IS
Supply Current
LPV321
4
µA
max
LPV358
8
16
µA
Both amplifiers
max
LPV324
16
24
µA
All four amplifiers
max
3
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2.7V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T = 25˚C, V+ = 2.7V, V− = 0V, VCM = 1.0V, VO = V+/2 and R
J
1 MΩ.
Units
>
L
Typ
(Note 6)
Limit
(Note 7)
Symbol
Parameter
Conditions
CL = 22 pF
GBWP
Φm
Gain-Bandwidth Product
Phase Margin
112
97
KHz
Deg
dB
Gm
Gain Margin
35
en
Input-Referred Voltage Noise
f = 1 kHz
f = 1 kHz
178
in
Input-Referred Current Noise
0.50
5V DC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T = 25˚C, V+ = 5V, V− = 0V, VCM = 2.0V, VO = V+/2 and R
1 MΩ.
>
J
L
Boldface limits apply at the temperature extremes.
Typ
(Note 6)
Limit
(Note 7)
Symbol
Parameter
Conditions
Units
VOS
Input Offset Voltage
1.5
2
7
10
mV
max
TCVOS
IB
Input Offset Voltage Average
Drift
µV/˚C
Input Bias Current
2
50
nA
60
max
IOS
Input Offset Current
0.6
71
40
50
nA
max
CMRR
PSRR
VCM
Common Mode Rejection Ratio 0V ≤ VCM ≤ 4V
50
50
0
dB
min
Power Supply Rejection Ratio
2.7V ≤ V+ ≤ 5V
65
dB
min
=
=
VO 1V, VCM 1V
Input Common-Mode Voltage
Range
For CMRR ≥ 50dB
−0.2
4.2
100
V+ −3.5
90
V
min
4
V
max
AV
VO
Large Signal Voltage Gain
(Note 8)
RL = 100kΩ
15
10
V+ −100
V+ −200
V/mV
min
Output Swing
RL = 100kΩ to 2.5V
mV
min
180
mV
220
max
IO
Output Short Circuit Current
Supply Current
Sourcing, VO = 0V
Sinking, VO = 5V
LPV321
17
2
mA
min
72
20
mA
min
IS
9
12
µA
15
max
LPV358
15
20
µA
Both amplifiers
24
max
LPV324
28
42
µA
All four amplifiers
46
max
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4
5V AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T = 25˚C, V+ = 5V, V− = 0V, VCM = 2.0V, VO = V+/2 and R
1 MΩ.
>
J
L
Boldface limits apply at the temperature extremes.
Typ
(Note 6)
Limit
(Note 7)
Symbol
Parameter
Conditions
Units
SR
Slew Rate
(Note 9)
0.1
152
87
V/µs
KHz
Deg
dB
GBWP
Φm
Gain-Bandwidth Product
Phase Margin
CL = 22 pF
Gm
Gain Margin
19
en
Input-Referred Voltage Noise
f = 1 kHz,
f = 1 kHz
146
in
Input-Referred Current Noise
0.30
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Human body model, 1.5 kΩ in series with 100 pF. Machine model, 0Ω in series with 200 pF.
+
Note 3: Shorting output to V will adversely affect reliability.
-
Note 4: Shorting output to V will adversely affect reliability.
Note 5: The maximum power dissipation is
a
function of
T
, θ , and T . The maximum allowable power dissipation at any ambient temperature is
J(max) JA A
P
= (T –T )/θ . All numbers apply for packages soldered directly into a PC board.
D
J(max)
A
JA
Note 6: Typical values represent the most likely parametric norm.
Note 7: All limits are guaranteed by testing or statistical analysis.
-
Note 8:
R
is connected to V . The output voltage is 0.5V ≤ V ≤ 4.5V.
L
O
Note 9: Connected as voltage follower with 3V step input. Number specified is the slower of the positive and negative slew rates.
Note 10: All numbers are typical, and apply for packages soldered directly onto a PC board in still air.
5
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Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply, TA = 25˚C.
Supply Current vs Supply
Voltage (LPV321)
Input Current vs
Temperature
Sourcing Current vs
Output Voltage
DS100920-B4
DS100920-B5
DS100920-41
Sourcing Current vs
Output Voltage
Sinking Current vs
Output Voltage
Sinking Current vs
Output Voltage
DS100920-42
DS100920-43
DS100920-44
Output Voltage Swing vs
Supply Voltage
Input Voltage Noise vs
Frequency
Input Current Noise vs
Frequency
DS100920-B6
DS100920-56
DS100920-70
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6
Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply,
TA = 25˚C. (Continued)
Input Current Noise vs Frequency
Crosstalk Rejection vs Frequency
PSRR vs Frequency
DS100920-68
DS100920-73
DS100920-72
CMRR vs
Frequency
CMRR vs Input
Common Mode Voltage
CMRR vs Input
Common Mode Voltage
DS100920-64
DS100920-63
DS100920-65
∆VOS vs CMR
∆VOS vs CMR
Input Voltage vs Output Voltage
DS100920-69
DS100920-45
DS100920-46
7
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Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply,
TA = 25˚C. (Continued)
Input Voltage vs
Output Voltage
Open Loop
Frequency Response
Open Loop
Frequency Response
DS100920-71
DS100920-52
DS100920-51
Gain and Phase vs
Capacitive Load
Gain and Phase vs
Capacitive Load
Slew Rate vs
Supply Voltage
DS100920-54
DS100920-53
DS100920-55
Non-Inverting Large
Signal Pulse Response
Non-Inverting Small
Signal Pulse Response
Inverting Large Signal
Pulse Response
DS100920-50
DS100920-49
DS100920-47
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8
Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply,
TA = 25˚C. (Continued)
Inverting Small Signal
Pulse Response
Stability vs Capacitive Load
Stability vs Capacitive Load
DS100920-48
DS100920-61
DS100920-60
Stability vs Capacitive Load
Stability vs Capacitive Load
THD vs Frequency
DS100920-59
DS100920-58
DS100920-62
Open Loop Output
Impedance vs Frequency
Short Circuit Current
vs Temperature (Sinking)
Short Circuit Current
vs Temperature (Sourcing)
DS100920-74
DS100920-B7
DS100920-B8
amplifier package, the LPV321/358/324 can be placed
closer to the signal source, reducing noise pickup and in-
creasing signal integrity.
Application Notes
1.0 Benefits of the LPV321/358/324
Simplified Board Layout. These products help you to avoid
using long pc traces in your pc board layout. This means that
no additional components, such as capacitors and resistors,
are needed to filter out the unwanted signals due to the inter-
ference between the long pc traces.
Size. The small footprints of the LPV321/358/324 packages
save space on printed circuit boards, and enable the design
of smaller electronic products, such as cellular phones, pag-
ers, or other portable systems. The low profile of the
LPV321/358/324 make them possible to use in PCMCIA
type III cards.
Low Supply Current. These devices will help you to maxi-
mize battery life. They are ideal for battery powered sys-
tems.
Signal Integrity. Signals can pick up noise between the sig-
nal source and the amplifier. By using a physically smaller
9
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ing the value of R due to the input bias current of the
F
Application Notes (Continued)
LPV321/358/324. C and RISO serve to counteract the loss
F
Low Supply Voltage. National provides guaranteed perfor-
mance at 2.7V and 5V. These guarantees ensure operation
throughout the battery lifetime.
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.
Rail-to-Rail Output. Rail-to-rail output swing provides maxi-
mum possible dynamic range at the output. This is particu-
larly important when operating on low supply voltages.
Input Includes Ground. Allows direct sensing near GND in
single supply operation.
+
The differential input voltage may be larger than V without
damaging the device. Protection should be provided to pre-
vent the input voltages from going negative more than −0.3V
(at 25˚C). An input clamp diode with a resistor to the IC input
terminal can be used.
2.0 Capacitive Load Tolerance
The LPV321/358/324 can directly drive 200 pF in unity-gain
without oscillation. The unity-gain follower is the most sensi-
tive configuration to capacitive loading. Direct capacitive
loading reduces the phase margin of amplifiers. The combi-
nation 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 ca-
pacitive load, circuit in Figure 1 can be used.
DS100920-5
FIGURE 3. Indirectly Driving A Capacitive Load with
DC Accuracy
3.0 Input Bias Current Cancellation
The LPV321/358/324 family has a bipolar input stage. The
typical input bias current of LPV321/358/324 is 1.5nA with
5V supply. Thus a 100kΩ input resistor will cause 0.15mV of
error voltage. By balancing the resistor values at both invert-
ing and non-inverting inputs, the error caused by the ampli-
fier’s input bias current will be reduced. The circuit in Figure
4 shows how to cancel the error caused by input bias
current.
DS100920-4
FIGURE 1. Indirectly Driving A Capacitive Load Using
Resistive Isolation
In Figure 1, 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 de-
pends on the value of RISO. The bigger the RISO resistor
value, the more stable VOUT will be. Figure 2 is an output
waveform of Figure 1 using 100kΩ for RISO and 1000pF for
CL.
DS100920-6
FIGURE 4. Cancelling the Error Caused by Input Bias
Current
4.0 Typical Single-Supply Application Circuits
4.1 Difference Amplifier
The difference amplifier allows the subtraction of two volt-
ages or, as a special case, the cancellation of a signal com-
mon to two inputs. It is useful as a computational amplifier, in
making a differential to single-ended conversion or in reject-
ing a common mode signal.
DS100920-75
FIGURE 2. Pulse Response of the LPV324 Circuit in
Figure 1
The circuit in Figure 3 is an improvement to the one in Figure
1 because it provides DC accuracy as well as AC stability. If
there were a load resistor in Figure 1, the output would be
voltage divided by RISO and the load resistor. Instead, in Fig-
ure 3, RF provides the DC accuracy by using feed-forward
techniques to connect VIN to RL. Caution is needed in choos-
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10
4.2.2 Two-op-amp Instrumentation Amplifier
Application Notes (Continued)
A two-op-amp instrumentation amplifier can also be used to
make a high-input-impedance DC differential amplifier (Fig-
ure 7). As in the three-op-amp circuit, this instrumentation
amplifier requires precise resistor matching for good CMRR.
R4 should equal to R1 and R3 should equal R2.
DS100920-7
DS100920-11
FIGURE 5. Difference Amplifier
4.2 Instrumentation Circuits
FIGURE 7. Two-op-amp Instrumentation Amplifier
4.3 Single-Supply Inverting Amplifier
The input impedance of the previous difference amplifier is
set by the resistor R1, R2, R3, and R 4. To eliminate the prob-
lems of low input impedance, one way is to use a voltage fol-
lower ahead of each input as shown in the following two in-
strumentation amplifiers.
There may be cases where the input signal going into the
amplifier is negative. Because the amplifier is operating in
single supply voltage, a voltage divider using R3 and R4 is
implemented to bias the amplifier so the input signal is within
the input common-common voltage range of the amplifier.
The capacitor C1 is placed between the inverting input and
resistor R1 to block the DC signal going into the AC signal
source, VIN. The values of R1 and C1 affect the cutoff fre-
4.2.1Three-op-amp Instrumentation Amplifier
The quad LPV324 can be used to build a three-op-amp in-
strumentation amplifier as shown in Figure 6
=
quency, fc 1/2π R 1C1.
As a result, the ouptut signal is centered around mid-supply
(if the voltage divider provides V+/2 at the non-inverting in-
put). The output can swing to both rails, maximizing the
signal-to-noise ratio in a low voltage system.
DS100920-85
FIGURE 6. Three-op-amp Instrumentation Amplifier
DS100920-13
The first stage of this instrumentation amplifier is
a
differential-input, differential-output amplifier, with two volt-
age followers. These two voltage followers assure that the
input impedance is over 100MΩ. The gain of this instrumen-
tation amplifier is set by the ratio of R2/R 1. R3 should equal
R1 and R4 equal R2. Matching of R3 to R1 and R4 to R2 af-
fects the CMRR. For good CMRR over temperature, low drift
resistors should be used. Making R4 Slightly smaller than R
FIGURE 8. Single-Supply Inverting Amplifier
4.4 Active Filter
4.4.1 Simple Low-Pass Active Filter
2
and adding a trim pot equal to twice the difference between
2 and R4 will allow the CMRR to be adjusted for optimum.
R
The simple low-pass filter is shown in Figure 9. Its
→
low-frequency gain(ω
o) is defined by −R3/R1. This allows
low-frequency gains other than unity to be obtained. The fil-
ter has a −20dB/decade roll-off after its corner frequency fc.
R
2 should be chosen equal to the parallel combination of R1
and R3 to minimize errors due to bais current. The frequency
response of the filter is shown in Figure 10
11
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Application Notes (Continued)
DS100920-14
FIGURE 9. Simple Low-Pass Active Filter
DS100920-15
FIGURE 10. Frequency Response of Simple Low-pass
Active Filter in Figure 9
Note that the single-op-amp active filters are used in to the
applications that require low quality factor, Q (≤ 10), low fre-
quency (≤ 5KHz), and low gain (≤ 10), or a small value for the
product of gain times Q (≤ 100). The op amp should have an
open loop voltage gain at the highest frequency of interest at
least 50 times larger than the gain of the filter at this fre-
quency. In addition, the selected op amp should have a slew
rate that meets the following requirement:
SlewRate ≥ 0.5 x (ωHV OPP) X 10−6V/µsec
Where ωH is the highest frequency of interest, and VOPP is
the output peak-to-peak voltage.
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12
SC70-5 Tape and Reel Specification
DS100920-B3
SOT-23-5 Tape and Reel Specification
TAPE FORMAT
Tape Section
Leader
# Cavities
0 (min)
75 (min)
3000
Cavity Status
Empty
Cover Tape Status
Sealed
(Start End)
Carrier
Empty
Sealed
Filled
Sealed
250
Filled
Sealed
Trailer
125 (min)
0 (min)
Empty
Sealed
(Hub End)
Empty
Sealed
13
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SOT-23-5 Tape and Reel Specification (Continued)
TAPE DIMENSIONS
DS100920-B1
±
±
±
0.315 0.012
8 mm
0.130
(3.3)
0.124
(3.15)
0.130
(3.3)
0.126
(3.2)
0.138 0.002
0.055 0.004
0.157
(4)
±
±
±
(3.5 0.05)
(1.4 0.11)
(8 0.3)
Tape Size
DIM A
DIM Ao
DIM B
DIM Bo
DIM F
DIM Ko
DIM P1
DIM W
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14
SOT-23-5 Tape and Reel Specification (Continued)
REEL DIMENSIONS
DS100920-B2
8 mm
7.00 0.059 0.512 0.795 2.165 0.331 + 0.059/−0.000 0.567
W1+ 0.078/−0.039
330.00 1.50 13.00 20.20 55.00
8.40 + 1.50/−0.00
14.40
W1 + 2.00/−1.00
Tape Size
A
B
C
D
N
W1
W2
W3
15
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Physical Dimensions inches (millimeters) unless otherwise noted
5-Pin SC70-5 Tape and Reel
Order Number LPV321M7 and LPV321M7X
NS Package Number MAA05A
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16
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
5-Pin SOT23-5 Tape and Reel
Order Number LPV321M5 and LPV321M5X
NS Package Number MA05B
17
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Pin Small Outline
Order Number LPV358M and LPV358MX
NS Package Number M08A
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18
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Pin MSOP
Order Number LPV358MM and LPV358MMX
NS Package Number MUA08A
19
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Pin Small Outline
Order Number LPV324M and LPV324MX
NS Package Number M14A
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20
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Pin TSSOP
Order Number LPV324MT and LPV324MTX
NS Package Number MTC14
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COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
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systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
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Tel: 1-800-272-9959
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SI9137DB
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