SGM8545
1.1MHz, 48μA, Rail-to-Rail I/O
CMOS Operational Amplifier
PRODUCT DESCRIPTION
The SGM8545 is a low cost, single rail-to-rail input and
output voltage feedback amplifier. It has a wide input
common mode voltage range and output voltage swing,
and takes the minimum operating supply voltage down to
2.1V. The maximum recommended supply voltage is
5.5V. It is specified over the extended -40℃ to +125℃
temperature range.
The SGM8545 provides 1.1MHz bandwidth at a low
current consumption of 48μA. Very low input bias current
of 0.5pA enables SGM8545 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 amplifier include safety monitoring,
portable equipment, battery and power supply control,
and signal conditioning and interfacing for transducers in
very low power systems.
The SGM8545 is available in the Green SOT-23-5
package.
FEATURES
●
Low Cost
●
Rail-to-Rail Input and Output
0.8mV Typical V
OS
●
Unity Gain Stable
●
Gain-Bandwidth Product: 1.1MHz
●
Very Low Input Bias Current: 0.5pA
●
Supply Voltage Range: 2.1V to 5.5V
●
Input Voltage Range:
-0.1V to +5.6V with V
S
= 5.5V
●
Low Supply Current: 48μA
●
Available in Green SOT-23-5 Package
PIN CONFIGURATION
(TOP VIEW)
SGM8545
OUT 1
+V
S
2
4
SOT-23-5
5
-V
S
APPLICATIONS
ASIC Input or Output Amplifier
Sensor Interface
Piezoelectric Transducer Amplifier
Medical Instrumentation
Mobile Communication
Audio Output
Portable Systems
Smoke Detectors
Mobile Telephone
Notebook PC
PCMCIA Cards
Battery-Powered Equipment
+IN 3
-IN
SG Micro Corp
www.sg-micro.com
REV. B. 3
SGM8545
PACKAGE/ORDERING INFORMATION
MODEL
SGM8545
ORDER NUMBER
SGM8545XN5/TR
PACKAGE
DESCRIPTION
SOT-23-5
1.1MHz, 48μA, Rail-to-Rail I/O
CMOS Operational Amplifier
PACKAGE
OPTION
Tape and Reel, 3000
MARKING
INFORMATION
8545
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℃
Package Thermal Resistance @ T
A
= +25℃
SOT-23-5,
θ
JA
…………………………………...………190°C/W
Operating Temperature Range ………………... -40℃ to +125℃
Lead Temperature (Soldering 10sec) ……………..……….260℃
ESD Susceptibility
HBM……………….............................................................4000V
MM……………….................................................................400V
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.
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
SGM8545
1.1MHz, 48μA, Rail-to-Rail I/O
CMOS Operational Amplifier
ELECTRICAL CHARACTERISTICS
(At V
S
= +5V, R
L
= 100kΩ connected to Vs/2, and V
OUT
= Vs/2, unless otherwise noted.)
TYP
PARAMETER
SYMBOL
CONDITIONS
+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
V
OL
V
OH
V
OL
Output Current
POWER SUPPLY
Operating Voltage Range
Power Supply Rejection Ratio
Quiescent Current
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
MIN/MAX OVER TEMPERATURE
+25℃
-40℃ to
+125℃
UNITS
MIN/MAX
V
CM
= V
S
/2
0.8
0.5
0.5
- 0.1 to + 5.6
88
76
100
105
2.7
3.5
mV
pA
pA
V
MAX
TYP
TYP
TYP
MIN
71
60
74
85
70
58
72
77
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
86
48
70
69
2.5
5.5
68
89
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
1.1
0.52
5.3
2.6
MHz
V/μs
μs
μs
TYP
TYP
TYP
TYP
TYP
TYP
Hz
SG Micro Corp
www.sg-micro.com
3
SGM8545
1.1MHz, 48μA, Rail-to-Rail I/O
CMOS Operational Amplifier
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, V
S
= +5V, and R
L
= 100kΩ connected to Vs/2, unless otherwise noted.
Small-Signal Step Response
G = +1
C
L
= 100pF
R
L
= 100kΩ
500mV/div
20mV/div
Large-Signal Step Response
G = +1
C
L
= 100pF
R
L
= 100kΩ
2μs/div
10μs/div
Small-Signal Overshoot vs. Load Capacitance
60
Small-Signal Overshoot (%)
Small-Signal Overshoot (%)
60
Small-Signal Overshoot vs. Load Capacitance
G = -1
R
FB
= 10kΩ
50
40
30
20
10
0
10
G = -5
R
FB
= 100kΩ
50
40
30
20
10
0
G = +1
R
L
= 100kΩ
G = -1
R
FB
= 5kΩ
100
1000
Load Capacitance (pF)
10000
10
100
1000
10000
Load Capacitance (pF)
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
Percentage of Amplifiers (%)
Offset Voltage Production Distribution
27
24
21
18
15
12
9
6
3
0
-3
-2
-1
0
0.5
1
1.5
2
2.5
-2.5
-1.5
Offset Voltage (mV)
-0.5
3
Typical production
distribution of
packaged units.
V
S
= 5.5V
Maximum Output Voltage
without Slew-Rate
Induced Distortion
SG Micro Corp
www.sg-micro.com
4
SGM8545
1.1MHz, 48μA, Rail-to-Rail I/O
CMOS Operational Amplifier
TYPICAL PERFORMANCE CHARACTERISTICS
At T
A
= +25℃, V
S
= +5V, and R
L
= 100kΩ connected to V
S
/2, unless otherwise noted.
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
PSRR
CMRR
Input Voltage Noise Spectral Density
vs. Frequency
1000
Voltage Noise (nV/√Hz)
100
10
0.01
0.1
1
10
Frequency (kHz)
100
3.5
3.0
Output Voltage (V)
2.5
2.0
1.5
1.0
0.5
0.0
0
Output Voltage vs. Output Current
135℃
Sourcing Current
Output Voltage vs. Output Current
6
5
Output Voltage (V)
135℃
Sourcing Current
25℃
-55℃
25℃
-55℃
V
S
= 3V
4
3
2
1
0
135℃
0
20
40
60
80
V
S
= 5V
135℃
10
20
30
-55℃
25℃
Sinking Current
40
50
60
-55℃
25℃
Sinking Current
140 160
100 120
Output Current (mA)
Output Current (mA)
Supply Current vs. Temperature
70
65
Open-Loop Gain vs. Temperature
120
Open–Loop Gain (dB)
110
100
90
80
70
60
R
L
= 5kΩ
R
L
= 100kΩ
Supply Current (μA)
60
55
50
45
40
35
30
-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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