GS321A/358A
1MHZ CMOS Rail-to-Rail IO Opamp with RF Filter
Features
•
•
•
•
•
•
Single-Supply Operation from +2.1V ~ +5.5V
Rail-to-Rail Input / Output
Gain-Bandwidth Product: 1MHz (Typ)
Low Input Bias Current: 1pA (Typ)
Low Offset Voltage: 0.4mV (Max)
Quiescent Current: 40µA per Amplifier (Typ)
•
•
•
Operating Temperature: -40°C ~ +125°C
Embedded RF Anti-EMI Filter
Small Package:
GS321A Available in SOT23-5 and SC70-5 Packages
GS358A Available in SOP-8 and MSOP-8 Packages
General Description
The GS321A/358A family have a high gain-bandwidth product of 1MHz, a slew rate of 0.6V/µs, and a quiescent current of
40µA/amplifier at 5V. The GS321A/358A 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 0.5mV for GS321A/358A family. They are specified over the extended industrial
SC70-5 and SOT23-5 packages. The GS358A Dual is available in Green SOP-8 and MSOP-8 packages.
Applications
•
•
•
•
ASIC Input or Output Amplifier
Sensor Interface
Medical Communication
Smoke Detectors
•
•
•
•
Audio Output
Piezoelectric Transducer Amplifier
Medical Instrumentation
Portable Systems
Pin Configuration
March 2020-REV_V0
℃
℃
temperature range (-40
to +125
). The operating range is from 2.1V to 5.5V. The GS321A single is available in Green
Figure 1. Pin Assignment Diagram
1/14
GS321A/358A
Absolute Maximum Ratings
Condition
Power Supply Voltage (V
DD
to Vss)
Analog Input Voltage (IN+ or IN-)
PDB Input Voltage
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10sec)
-55°C
+260°C
)
125°C/W
216°C/W
190°C/W
333°C/W
Min
-0.5V
Vss-0.5V
Vss-0.5V
-40°C
+160°C
+150°C
Max
+7.5V
V
DD
+0.5V
+7V
+125°C
SOP-8, θ
JA
MSOP-8, θ
JA
SOT23-5, θ
JA
SC70-5, θ
JA
ESD Susceptibility
HBM
MM
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
MODEL
CHANNEL
ORDER NUMBER
GS321A-CR
GS321A
Single
GS321A-TR
GS321YA-CR
GS321YA-TR
GS358A
Dual
GS358A-SR
GS358A-MR
PACKAGE
DESCRIPTION
SC70-5
SOT23-5
SC70-5
SOT23-5
SOP-8
MSOP-8
PACKAGE
OPTION
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,4000
Tape and Reel,3000
MARKING
INFORMATION
321
321
321Y
321Y
GS358
GS358
March 2020-REV_V0
℃
Package Thermal Resistance (T
A
=+25
6KV
300V
2/14
GS321A/358A
Electrical Characteristics
(At V
S
= +5V, R
L
= 100kΩ connected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.)
GS321A/358A
PARAMETER
SYMBOL
CONDITIONS
TYP
MIN/MAX OVER TEMPERATURE
INPUT CHARACTERISTICS
Input Offset Voltage
Input Bias Current
Input Offset Current
Common-Mode Voltage Range
Common-Mode Rejection Ratio
V
OS
I
B
I
OS
V
CM
CMRR
V
S
= 5.5V, V
CM
= -0.1V to 5.6V
R
L
= 5kΩ, V
O
= +0.1V to +4.9V
Open-Loop Voltage Gain
Input Offset Voltage Drift
OUTPUT CHARACTERISTICS
V
OH
V
OL
Output Voltage Swing from Rail
V
OH
V
OL
I
SOURCE
Output Current
I
SINK
POWER SUPPLY
R
L
= 10Ω to V
S
/2
R
L
= 10kΩ
R
L
= 10kΩ
R
L
= 100kΩ
R
L
= 100kΩ
A
OL
R
L
= 10kΩ, V
O
= +0.1V to +4.9V
∆V
OS
/∆
T
V
S
= 5.5V
V
S
= 5.5V, V
CM
= -0.1V to 4V
V
CM
= V
S
/2
0.1
1
1
-0.1 to +5.6
70
68
80
100
2.7
0.4
0.8
62
56
70
94
62
55
70
85
4.997
3
4.992
8
84
75
4.990
10
4.970
30
60
60
4.980
20
4.960
40
45
V
mV
V
mV
mA
45
2.1
Operating Voltage Range
5.5
Power Supply Rejection Ratio
Quiescent Current / Amplifier
PSRR
I
Q
V
S
= +2.5V to +5.5V, V
CM
= +0.5V
82
40
60
60
2.5
5.5
58
80
V
V
dB
µA
DYNAMIC PERFORMANCE (CL = 100pF)
Gain-Bandwidth Product
Slew Rate
Settling Time to 0.1%
Overload Recovery Time
NOISE PERFORMANCE
f = 1kHz
Voltage Noise Density
e
n
f = 10kHz
20
nV
/
Hz
GBP
SR
t
S
G = +1, 2V Output Step
G = +1, 2V Output Step
V
IN
·Gain = V
S
1
0.6
5
2.6
MHz
V/µs
µs
µs
27
nV
/
Hz
March 2020-REV_V0
℃
℃
℃
℃
℃
+25
+25
-40
to +85
UNITS
MIN/MAX
mV
pA
pA
V
dB
MAX
TYP
TYP
TYP
MIN
dB
MIN
µV/
TYP
MIN
MAX
MIN
MAX
MIN
MIN
MAX
MIN
MAX
TYP
TYP
TYP
TYP
TYP
TYP
3/14
GS321A/358A
Typical Performance characteristics
At T
A
=+25 C, V
S
=+5V, and R
L
=100KΩ connected to V
S
/2, unless otherwise noted.
Large-Signal Step Response
G=+1
C
L
=100pF
R
L
=100KΩ
Small-Signal Step Response
G=+1
C
L
=100pF
R
L
=100KΩ
o
Output Voltage (500mV/div)
Time (4µs/div)
Output Voltage (20mV/div)
Time (2µs/div)
Supply Current vs. Supply Voltage
Short-Circuit Current vs. Supply Voltage
Supply Voltage (V)
Short-Circuit Current (mA)
Supply Current (uA)
Supply Voltage (V)
Output Voltage vs. Output Current
Output Voltage vs. Output Current
Sourcing Current
Output Voltage (V)
Output Voltage (V)
Sourcing Current
Vs=5V
Vs=3V
Sinking Current
Sinking Current
Output Current (mA)
Output Current (mA)
March 2020-REV_V0
4/14
GS321A/358A
Typical Performance characteristics
At T
A
=+25 C, V
S
=+5V, and R
L
=100KΩ connected to V
S
/2, unless otherwise noted.
Overload Recovery Time
Supply Current vs. Temperature
o
Input Voltage Noise Spectral Density vs. Frequency
Open Loop Gain, Phase Shift vs. Frequency at +5V
Voltage Noise (nV/√Hz)
Frequency (kHz)
Frequency (kHz)
CMRR vs. Frequency
PSRR vs. Frequency
CMRR (dB)
Frequency (kHz)
PSRR (dB)
Frequency (kHz)
March 2020-REV_V0
5/14
Phase Shift (Degrees)
Open Loop Gain (dB)
℃
Time (2µs/div)
Supply Current (µA)
Vs=5V
G=-5
V
IN
=500mV
Temperature ( )
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