SGM321/SGM358/SGM324
1MHz, 60μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
PRODUCT DESCRIPTION
The SGM321 (single), SGM358 (dual) and SGM324
(quad) are low cost, rail-to-rail input and output voltage
feedback amplifiers. They have a wide input common
mode voltage range and output voltage swing, and take
the minimum operating supply voltage down to 2.1V. The
maximum recommended supply voltage is 5.5V. All are
specified over the extended -40℃ to +85℃ temperature
range.
The SGM321/358/324 provide 1MHz bandwidth at a low
current consumption of 60μA per amplifier. Very low input
bias currents of 10pA enable SGM321/358/324 to be
used for integrators, photodiode amplifiers, and
piezoelectric sensors. Rail-to-rail input and output are
useful to designers for buffering ASIC in single-supply
systems.
Applications for this series of amplifiers include safety
monitoring, portable equipment, battery and power supply
control, and signal conditioning and interfacing for
transducers in very low power systems.
The SGM321 is available in the Green SOT-23-5 and
SC70-5 packages. The SGM358 comes in the Green
SOIC-8, MSOP-8 and DIP-8 packages. The SGM324 is
offered in the Green SOIC-14 and TSSOP-14 packages.
FEATURES
Low Cost
Rail-to-Rail Input and Output
0.8mV Typical V
OS
Unity Gain Stable
Gain-Bandwidth Product: 1MHz
Very Low Input Bias Current: 10pA
Supply Voltage Range: 2.1V to 5.5V
Input Voltage Range:
-0.1V to +5.6V with V
S
= 5.5V
Low Supply Current: 60μA/Amplifier
Small Packaging
SGM321 Available in SOT-23-5 and SC70-5
SGM358 Available in SOIC-8, MSOP-8 and DIP-8
SGM324 Available in SOIC-14 and TSSOP-14
PIN CONFIGURATIONS
(TOP VIEW)
SGM321YN5
SGM321YC5
+IN
-V
S
-IN
1
2
3
4
OUT
5
+V
S
SGM321BYN5
OUT
-V
S
1
2
4
-IN
5
+V
S
+IN 3
SOT-23-5
APPLICATIONS
ASIC Input or Output Amplifier
Sensor Interface
Piezoelectric Transducer Amplifier
Medical Instrumentation
Mobile Communication
Audio Output
Portable Systems
Smoke Detectors
Notebook PC
PCMCIA Cards
Battery-Powered Equipment
DSP Interface
SOT-23-5/SC70-5
OUT A
1
2
3
4
5
6
7
SGM324
14 OUT D
13
-IND
SGM358
OUT A 1
-INA 2
+INA 3
-V
S
4
8
7
+V
S
OUT B
-IN A
+IN A
+V
S
+INB
-INB
5 +INB
OUT B
12 +IND
11 -V
S
10 +INC
9
8
-INC
OUT C
6 -INB
SOIC-8/MSOP-8/DIP-8
TSSOP-14/SOIC-14
SG Micro Corp
www.sg-micro.com
REV. D. 4
SGM321/SGM358/SGM324
PACKAGE/ORDERING INFORMATION
MODEL
ORDER NUMBER
SGM321YC5/TR
SGM321
SGM321YN5/TR
SGM321BYN5/TR
SGM358YS/TR
SGM358
SGM358YMS/TR
SGM358YP
SGM324
SGM324YS14/TR
SGM324YTS14/TR
PACKAGE
DESCRIPTION
SC70-5
SOT-23-5
SOT-23-5
SOIC-8
MSOP-8
DIP-8
SOIC-14
TSSOP-14
1MHz, 60μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 2500
Tape and Reel, 3000
Tube, 50
Tape and Reel, 2500
Tape and Reel, 3000
MARKING
INFORMATION
321
321
321B
SGM358YS
SGM358YMS
SGM358YP
SGM324YS14
SGM324YTS14
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, +V
S
to -V
S
....................................................6V
Common Mode Input Voltage
....................................................... (-V
S
) - 0.3V to (+V
S
) + 0.3V
Storage Temperature Range............................-65℃ to +150℃
Junction Temperature.......................................................150℃
Operating Temperature Range...........................-40℃ to +85℃
Package Thermal Resistance @ T
A
= +25℃
SC70-5,
θ
JA
................................................................ 333℃/W
NOTE:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress
ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections
of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
SOT-23-5,
θ
JA
............................................................... 190℃/W
SOIC-8,
θ
JA
....................................................................125℃/W
MSOP-8,
θ
JA
................................................................. 216℃/W
Lead Temperature (Soldering 10sec)................................260℃
ESD Susceptibility
HBM..................................................................................4000V
MM......................................................................................400V
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause
damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
SGMICRO reserves the right to make any change in circuit design, specification or other related things if necessary without notice at
any time. Please contact SGMICRO sales office to get the latest datasheet.
SG Micro Corp
www.sg-micro.com
2
SGM321/SGM358/SGM324
1MHz, 60μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
ELECTRICAL CHARACTERISTICS
(At V
S
= +5V, R
L
= 100kΩ connected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.)
SGM321/358/324
PARAMETER
SYMBOL
CONDITIONS
TYP
+25℃
INPUT CHARACTERISTICS
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Common Mode Voltage Range
Common Mode Rejection Ratio
V
OS
I
B
I
OS
V
CM
CMRR
V
S
= 5.5V
V
S
= 5.5V, V
CM
= -0.1V to 4V
V
S
= 5.5V, V
CM
= -0.1V to 5.6V
Open-Loop Voltage Gain
Input Offset Voltage Drift
OUTPUT CHARACTERISTICS
V
OH
Output Voltage Swing from Rail
V
OL
V
OH
V
OL
Output Current
POWER SUPPLY
Operating Voltage Range
Power Supply Rejection Ratio
Quiescent Current/Amplifier
DYNAMIC PERFORMANCE
(C
L
= 100pF)
Gain-Bandwidth Product
Slew Rate
Settling Time to 0.1%
Overload Recovery Time
NOISE PERFORMANCE
Voltage Noise Density
e
n
f = 1kHz
f = 10kHz
27
20
nV/
nV/
Hz
Hz
MIN/MAX OVER TEMPERATURE
+25℃
-40℃ to
+85℃
UNITS
MIN/MAX
V
CM
= V
S
/2
0.8
10
10
-0.1 to +5.6
70
68
80
84
2.7
5
5.6
mV
pA
pA
V
MAX
TYP
TYP
TYP
MIN
62
56
70
80
62
55
70
80
dB
A
OL
ΔV
OS
/Δ
T
R
L
= 5kΩ, V
O
= +0.1V to +4.9V
R
L
= 100kΩ, V
O
= +0.035V to +4.965V
dB
μV/℃
MIN
TYP
R
L
= 100kΩ
R
L
= 100kΩ
R
L
= 10kΩ
R
L
= 10kΩ
R
L
= 10Ω to V
S
/2
4.997
5
4.992
8
84
75
4.980
20
4.970
30
60
60
4.970
30
4.960
40
45
45
V
mV
V
mV
mA
MIN
MAX
MIN
MAX
MIN
I
SOURCE
I
SINK
2.1
5.5
PSRR
I
Q
V
S
= +2.5V to +5.5V, V
CM
= +0.5V
82
60
60
80
2.5
5.5
58
86
V
V
dB
μA
MIN
MAX
MIN
MAX
GBP
SR
t
S
G = +1, 2V Output Step
G = +1, 2V Output Step
V
IN
·Gain = V
S
1
0.52
5.3
2.6
MHz
V/μs
μs
μs
TYP
TYP
TYP
TYP
TYP
TYP
SG Micro Corp
www.sg-micro.com
3
SGM321/SGM358/SGM324
1MHz, 60μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, V
S
= +5V, and R
L
= 100kΩ connected to V
S
/2, unless otherwise noted.
Small-Signal Step Response
G = +1
C
L
= 100pF
R
L
= 100kΩ
Large-Signal Step Response
G = +1
C
L
= 100pF
R
L
= 100kΩ
20mV/div
2μs/div
500mV/div
10μs/div
Small-Signal Overshoot vs. Load Capacitance
60
Small-Signal Overshoot (%)
50
40
30
20
10
0
10
100
1000
Load Capacitance (pF)
10000
Small-Signal Overshoot vs. Load Capacitance
60
Small-Signal Overshoot (%)
G = -1
R
FB
= 100kΩ
G = -5
R
FB
= 100kΩ
50
40
30
20
10
0
10
G = +1
R
L
= 100kΩ
G = -1
R
FB
= 5kΩ
100
1000
Load Capacitance (pF)
10000
Maximum Output Voltage vs. Frequency
6
5
Output Voltage (V
p-p
)
4
3
2
1
0
1
10
100
1000
Frequency (kHz)
10000
V
S
= 2.5V
V
S
= 5V
V
S
= 5.5V
Supply Current vs. Supply Voltage
80
70
Supply Current (μA)
60
50
40
30
20
10
0
0
1
2
3
4
5
Supply Voltage (V)
6
7
Maximum Output Voltage
without Slew-Rate
Induced Distortion
SG Micro Corp
www.sg-micro.com
4
SGM321/SGM358/SGM324
1MHz, 60μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, V
S
= +5V, and R
L
= 100kΩ connected to V
S
/2, unless otherwise noted.
Input Voltage Noise Spectral Density
vs. Frequency
1000
Voltage Noise (nV/√Hz)
CMRR and PSRR vs. Frequency
100
90
80
CMRR, PSRR (dB)
70
60
50
40
30
20
10
0
0.01
0.1
1
10
100
Frequency (kHz)
1000
10000
10
0.01
CMRR
100
PSRR
0.1
1
Frequency (kHz)
10
100
Output Voltage vs. Output Current
3.5
3.0
Output Voltage (V)
2.5
2.0
1.5
1.0
0.5
0.0
0
10
20
135℃
30
-55℃
25℃
Sinking Current
40
50
60
V
S
= 3V
135℃
Sourcing Current
Output Voltage (V)
6
5
Output Voltage vs. Output Current
135℃
Sourcing Current
25℃
-55℃
V
S
= 5V
25℃
-55℃
4
3
2
1
0
0
20
40
135℃
60
80
-55℃
25℃
Sinking Current
100 120 140 160
Output Current (mA)
Output Current (mA)
Supply Current vs. Temperature
80
Open-Loop Gain vs. Temperature
120
Open–Loop Gain (dB)
110
100
90
80
70
60
R
L
= 5kΩ
R
L
= 100kΩ
75
Supply Current (μA)
70
65
60
55
50
-50
-25
0
25
50
75
100 125 150
Temperature (℃)
-50
-25
0
25
50
75
100 125 150
Temperature (℃)
SG Micro Corp
www.sg-micro.com
5
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