LM321H/358H/324H
1MHZ High Voltage Bipolar Opamp
Features
Single-Supply Operation from +3V ~ +36V
Large Outpu Voltage Swing:0V to Vcc-1.5V
Dual-Supply Operation from ±1.5V ~ ±18V
Operating Temperature: -25°C ~ +85°C
Gain-Bandwidth Product: 1MHz (Typ)
Small Package:
Low Input Bias Current: 20nA (Typ)
LM321H Available in SOT23-5 Package
Low Offset Voltage: 5mV (Max)
LM358H Available in SOP-8 and MSOP-8 Packages
Quiescent Current: 250μA per Amplifier (Typ)
LM324H Available in SOP-14 Package
Input Common Mode Voltage Range Includes
Ground
General Description
The LM321H/358H/324H family have a high gain-bandwidth product of 1MHz, a slew rate of 0.2V/μs, and a quiescent current
of 250μA/amplifier at 5V. The LM321H/358H/324H family is designed to provide optimal performance in low voltage and low
noise systems. The maximum input offset voltage is 5mV for LM321H/358H/324H family. The operating range is from 3V to
36V. The LM321H single is available in Green SOT-23-5 package. The LM358H Dual is available in Green SOP-8 and
MSOP-8 packages. The LM324H Quad is available in Green SOP-14 package.
Applications
Walkie-Talkie
Battery Management Solution
Oscillators
Transducer Amplifiers
Switcching Telephone
Summing Amplifiers
Portable Systems
Multivibrators
Pin Configuration
Figure 1. Pin Assignment Diagram
March 2020-REV_V3
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LM321H/358H/324H
Absolute Maximum Ratings
Condition
Symbol
Max
Vcc
±20V or 40V
VI(DIFF)
40V
VI
-0.3V~40V
Operating Temperature Range
Topr
-25°C ~+85°C
Storage Temperature Range
Tstg
-65°C ~+150°C
Power Supply Voltage
Differential input voltage
Input Voltage
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
MARKING
DESCRIPTION
OPTION
INFORMATION
LM321H-TR
SOT23-5
Tape and Reel,3000
LM321
LM358H-SR
SOP-8
Tape and Reel,4000
LM358
LM358H-MR
MSOP-8
Tape and Reel,3000
LM358
LM324H-SR
SOP-14
Tape and Reel,2500
LM324
MODEL
CHANNEL
ORDER NUMBER
LM321H
Single
LM358H
Dual
LM324H
Quad
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LM321H/358H/324H
Electrical Characteristics
(At VS = +15V, TA=25oC, unless otherwise noted.)
LM321H/358H/324H
PARAMETER
SYMBOL
CONDITIONS
TYP
MIN/MAX OVER TEMPERATURE
+25℃
+25℃
UNITS
MIN/MAX
0.4
5
mV
MAX
INPUT CHARACTERISTICS
Input Offset Voltage
VOS
VCM = VS/2
Input Bias Current
IB
20
nA
TYP
Input Offset Current
IOS
5
nA
TYP
Common-Mode Voltage Range
VCM
-0.1 to +4
V
TYP
Common-Mode Rejection Ratio
CMRR
Open-Loop Voltage Gain
AOL
Input Offset Voltage Drift
ΔVOS/ΔT
VS = 5.5V
VCM = 0V to Vs-1.5V
70
60
dB
MIN
RL = 5kΩ, VO = 1V to 11V
100
85
dB
MIN
7
μV/℃
TYP
V
MIN
OUTPUT CHARACTERISTICS
Output Voltage Swing from Rail
Output Current
VOH
RL = 2kΩ
11
VOL
RL = 2kΩ
5
20
mV
MAX
VOH
RL = 10kΩ
12
13
V
MIN
VOL
RL = 10kΩ
5
20
mV
MAX
40
60
40
60
mA
MAX
3
V
MIN
36
V
MAX
ISOURCE
ISINK
RL = 10Ω to VS/2
POWER SUPPLY
Operating Voltage Range
Power Supply Rejection Ratio
PSRR
Quiescent Current / Amplifier
IQ
VS = +5V to +36V, VCM = +0.5V
100
70
dB
MIN
∞
0.25
2.0
mA
MAX
1
MHz
TYP
0.2
V/μs
TYP
VS = 36V, RL=
DYNAMIC PERFORMANCE
Gain-Bandwidth Product
Slew Rate
January 2021-REV_V0
GBP
SR
G = +1, 2V Output Step
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LM321H/358H/324H
Typical Performance characteristics
January 2021-REV_V0
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LM321H/358H/324H
Typical Performance characteristics
January 2021-REV_V0
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LM321H/358H/324H
Application Note
Size
LM321H/358H/324H family series op amps are unity-gain stable and suitable for a wide range of general-purpose applications.
The small footprints of the LM321H/358H/324H family packages save space on printed circuit boards and enable the design of
smaller electronic products.
Power Supply Bypassing and Board Layout
LM321H/358H/324H family series operates from a single 3V to 36V supply or dual ±1.5V to ±18V 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 250μA per channel) of LM321H/358H/324H family will help to maximize battery life.
Operating Voltage
LM321H/358H/324H family operates under wide input supply voltage (3V to 36V). In addition, all temperature specifications
apply from -25 oC to +85 oC. Most behavior remains unchanged throughout the full operating voltage range. These guarantees
ensure operation throughout the single Li-Ion battery lifetime.
Capacitive Load Tolerance
The LM321H/358H/324H family is optimized for bandwidth and speed, not for driving capacitive loads. Output capacitance will
create apole 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
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LM321H/358H/324H
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
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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LM321H/358H/324H
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 LM321H/358H/324H family.
Figure 4. Differential Amplifier
VOUT( RR13RR24 ) RR14 VIN RR12 VIP ( RR13RR24 ) RR13 VREF
If the resistor ratios are equal (i.e. R1=R3 and R2=R4), then
VOUT
R2
R1
(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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LM321H/358H/324H
Instrumentation Amplifier
The triple LM321H/358H/324H 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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LM321H/358H/324H
Package Information
SOP-8
January 2021-REV_V0
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LM321H/358H/324H
MSOP-8
January 2021-REV_V0
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LM321H/358H/324H
SOP-14
January 2021-REV_V0
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LM321H/358H/324H
SOT23-5
January 2021-REV_V0
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