UNISONIC TECHNOLOGIES CO., LTD LM321

UNISONIC TECHNOLOGIES CO., LTD
LM321
Preliminary
LINEAR INTEGRATED CIRCUIT
LOW POWER SINGLE OP AMP

DESCRIPTION
The UTC LM321’s quiescent current is only 430µA (5V). The
UTC LM321 brings performance and economy to low power
systems, With a high unity gain frequency and a specified 0.4V/µs
slew rate. The input common mode range includes ground and
therefore the device is able to operate in single supply
applications as well as in dual supply applications. It is also
capable of comfortably driving large capacitive loads.

FEATURES
* Low supply current 430µA
* VCC=5V, TA=25°C. Typical values unless specified.
* Gain-Bandwidth product 1MHz
* Low input bias current 45nA
* Wide supply voltage range +3V~+32V
* Stable with high capacitive loads

ORDERING INFORMATION
Ordering Number
LM321G- AE5-R

Package
SOT-23-5
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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LM321
Preliminary

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
1
2
3
4
5

PIN NAME
+IN
V-IN
OUTPUT
V+
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
Non-inverting input
Ground
inverting input
Output
Power supply
BLOCK DIAGRAM
5 V+
+IN 1
+
V- 2
-
-IN 3
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4 OUTPUT
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
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage (V+ - V−)
VCC
32
V
Differential Input Voltage
VI(DIFF)
±Supply Voltage
V
Input Voltage
VIN
-0.3~+32
V
Input Current (VIN<−0.3V) (Note 2)
50
mA
Output Short Circuit to GND, V+≤15V and
Continuous
TA=25°C (Note 3)
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65~+150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. This input current will only exist when the voltage at any of the input leads is driven negative. It is due to
the collector base junction of the input PNP transistors becoming forward biased and thereby acting as
input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on
the IC chip. This transistor action can cause the output voltages of the op amps to go to the V+ voltage
level (or to ground for a large overdrive) for the time duration that an input is driven negative. This is not
destructive and normal output states will re-establish when the input voltage, which was negative, again
returns to a value greater than -0.36V (at 25°C).
3. Short circuits from the output V+ can cause excessive heating and eventual destruction. When considering
short circuits to ground the maximum output current is approximately 40mA independent of the magnitude
of V+. At values of supply voltage in excess of +15V, continuous short circuits can exceed the power
dissipation ratings and cause eventual destruction.

OPERATING RATINGS
PARAMETER
Temperature Range
Supply Voltage

SYMBOL
TA
V+
RATINGS
-40~85
3~30
UNIT
°C
V
SYMBOL
θJA
RATINGS
265
UNIT
°С/W
THERMAL DATA
PARAMETER
Junction to Ambient
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
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, all limits guaranteed for TA=25˚C, V+=5V, V−=0V, VO=1.4V.)
MIN
PARAMETER
SYMBOL
TEST CONDITIONS
(Note 1)
Input Offset Voltage
VOS
(Note 3)
Input Bias Current (Note 4)
IB
Input Offset Current
IOS
V+=30V (Note 5)
Input Common-Mode Voltage
VCM
0
Range
For CMRR>=50dB
25
(V+=15V, RL=2kΩ
Large Signal Voltage Gain
AV
VO=1.4V~11.4V)
15
Power Supply Rejection Ratio
PSRR
RS≤10kΩ, V+≤5V~30V
65
Common Mode Rejection Ratio
CMRR RS≤10kΩ
65
+
Output Swing
VOL
V =5V, RL=10kΩ
V+=5V
Supply Current, No Load
IS
V+=30V
Output Current Sourcing
ISOURCE VID=+1V, V+=15V, VO=2V
20
+
10
VID=-1V, V =15V, VO=2V
Output Current Sinking
ISINK
VID=-1V, V+=15V, VO=0.2V
12
Output Short Circuit to Ground
IO
V+=15V
(Note 6)
V+=15V, RL=2kΩ, VIN=0.5~3V,
Slew Rate
SR
CL=100pF, Unity Gain
V+=30V, f=100kHz, VIN=10mV,
Gain Bandwidth Product
GBW
RL=2kΩ, CL=100pF
Phase Margin
φm
f=1kHz, AV=20dB, RL=2kΩ,
Total Harmonic Distortion
THD
VO=2VPP, CL=100pF, V+=30V
Equivalent Input Noise Voltage
en
f=1kHz, RS=100Ω, V+=30V
TYP
MAX
(Note 2) (Note 1)
2
7
45
250
5
50
V+ -1.5
100
100
85
5
0.430
0.660
40
20
100
40
20
1.15
2.85
85
UNIT
mV
nA
nA
V
V/mV
V/mV
dB
dB
mV
mA
mA
mA
mA
µA
mA
0.4
V/µs
1
MHz
60
deg
0.015
%
40
nV Hz
Notes: 1. All limits are specified by testing or statistical analysis.
2. Typical values represent the most likely parametric norm.
3. VO  1.4V, RS=0Ω with V+ from 5V to 30V; and over the full input common-mode range (0V~V+ -1.5V) at
25°C.
4. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially
constant, independent of the state of the output so no loading change exists on the input lines.
5. The input common-mode voltage of either input signal voltage should not be allowed to go negative by
more than 0.3V (at 25°C). The upper end of the common-mode voltage range is V+-1.5V at 25°C, but either
or both inputs can go to +32V without damage, independent of the magnitude of V+.
6. Short circuits from the output V+ can cause excessive heating and eventual destruction. When considering
short circuits to ground the maximum output current is approximately 40mA independent of the magnitude
of V+. At values of supply voltage in excess of +15V, continuous short circuits can exceed the power
dissipation ratings and cause eventual destruction.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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
Preliminary
LINEAR INTEGRATED CIRCUIT
SIMPLIFIED SCHEMATIC
V+
100µA
4µA
6µA
Q5
Q6
CC
Q2
INPUTS-
Q7
Q3
Q1
Q4
RSC
OUTPUT
Q13
Q11
Q12
INPUTS+
Q10
Q8
50µA
Q9
V-
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
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
VO (VOLTS)
Non-Inverting DC Gain (0V Input = 0V Output)
Power Amplifier
LED Driver
R1
910k
R2
100k
+VIN
R3
91k
20mA
V+
82
-
+
NSL 102
VO
RL
V0=0 VDC for VIN=0 VDC, AV=10
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LM321
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT(Cont.)
Lamp Driver
Fixed Current Sources
V
+
2V
-
V+
+
+
2V
-
R3
2k
R1
2k
0

Preliminary
R2
-
-
+
30mA
β≥20
600mA
100
+
R4
3k
I1
I2
1mA
R1
I2 = R2 I1
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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