SGM8521/2/4
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
GENERAL DESCRIPTION
The
SGM8521
(single),
SGM8522
FEATURES
(dual)
and
● Low Cost
SGM8524 (quad) are low cost, rail-to-rail input and
● Rail-to-Rail Input and Output
output voltage feedback amplifiers. They have a wide
● 1mV Typical VOS
input common mode voltage range and output voltage
● Unity Gain Stable
swing, and take the minimum operating supply voltage
● Gain-Bandwidth Product: 150kHz
down to 2.1V. The maximum recommended supply
● Supply Voltage Range: 2.1V to 5.5V
voltage is 5.5V. All are specified over the extended -40℃
● Input Voltage Range:
-0.1V to +5.6V with VS = 5.5V
to +125℃ temperature range.
The SGM8521/2/4 provide 150kHz bandwidth at a low
current consumption of 5.5μA per amplifier. Very low
input bias currents enable the SGM8521/2/4 to be used
for integrators, photodiode amplifiers, and piezoelectric
sensors. Rail-to-rail input and output are useful to
● Low Supply Current: 5.5μA/Amplifier
● Small Packaging
SGM8521 Available in SOIC-8 and SOT-23-5
SGM8522 Available in SOIC-8 and MSOP-8
SGM8524 Available in SOIC-14 and TSSOP-14
designers for buffering ASIC in single-supply systems.
Applications
for
these
amplifiers
include
safety
monitoring, portable equipment, battery and power
supply control, and signal conditioning and interfacing
for transducers in very low power systems.
APPLICATIONS
ASIC Input or Output Amplifier
Sensor Interface
Piezoelectric Transducer Amplifier
The SGM8521 single is available in Green SOT-23-5
Medical Instrumentation
and SOIC-8 packages. The SGM8522 dual comes in
Mobile Communication
Green SOIC-8 and MSOP-8 packages. The SGM8524
Audio Output
quad is offered in Green SOIC-14 and TSSOP-14
Portable Systems
packages.
Smoke Detectors
Mobile Telephone
Notebook PC
PCMCIA Cards
Battery-Powered Equipment
SG Micro Corp
www.sg-micro.com
JANUARY 2017 – REV. C. 3
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
PACKAGE/ORDERING INFORMATION
MODEL
SGM8521
SGM8522
SGM8524
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
SOT-23-5
-40℃ to +125℃
SGM8521XN5/TR
8521
Tape and Reel, 3000
SOIC-8
-40℃ to +125℃
SGM8521XS/TR
SOIC-8
-40℃ to +125℃
SGM8522XS/TR
MSOP-8
-40℃ to +125℃
SGM8522XMS/TR
SOIC-14
-40℃ to +125℃
SGM8524XS14/TR
TSSOP-14
-40℃ to +125℃
SGM8524XTS14/TR
SGM8521XS
XXXXX
SGM8522XS
XXXXX
SGM8522
XMS
XXXXX
SGM8524XS14
XXXXX
SGM8524
XTS14
XXXXX
Tape and Reel, 2500
Tape and Reel, 2500
Tape and Reel, 3000
Tape and Reel, 2500
Tape and Reel, 3000
NOTE: XXXXX = Date Code and Vendor Code.
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, +VS to -VS ................................................ 6V
Common Mode Input Voltage ..... (-VS) - 0.3V to (+VS) + 0.3V
Package Thermal Resistance @ TA = +25℃
SOT-23-5, θJA .......................................................... 190℃/W
SOIC-8, θJA .............................................................. 125℃/W
MSOP-8, θJA ............................................................ 216℃/W
Storage Temperature Range ........................ -65℃ to +150℃
Junction Temperature .................................................+150℃
Lead Temperature (Soldering 10sec) .........................+260℃
ESD Susceptibility
HBM ............................................................................. 4000V
MM ................................................................................. 400V
RECOMMENDED OPERATING CONDITIONS
Operating Temperature Range ..................... -40℃ to +125℃
OVERSTRESS CAUTION
Stresses beyond those listed may cause permanent damage
to the device. Functional operation of the device at these or
any other conditions beyond those indicated in the operational
section of the specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
reliability.
ESD SENSITIVITY 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.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, specification or other related things if necessary
without notice at any time.
SG Micro Corp
www.sg-micro.com
JANUARY 2017
2
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
PIN CONFIGURATIONS
SGM8521 (TOP VIEW)
OUT
1
-VS
2
5
+IN 3
4
SGM8522 (TOP VIEW)
+VS
-IN
OUTA
1
8 +VS
-INA
2
7 OUTB
+INA
3
6 -INB
-VS
4
5 +INB
SOT-23-5
SOIC-8/MSOP-8
SGM8524 (TOP VIEW)
SGM8521 (TOP VIEW)
NC 1
8
NC
-IN 2
7
+VS
+IN 3
6
OUT
5
NC
-VS 4
NC = NO CONNECT
SOIC-8
OUTA
1
14 OUTD
-INA
2
13 -IND
+INA
3
12 +IND
+VS
4
11 -VS
+INB
5
10 +INC
-INB
6
9
-INC
OUTB
7
8
OUTC
TSSOP-14/SOIC-14
SG Micro Corp
www.sg-micro.com
JANUARY 2017
3
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
ELECTRICAL CHARACTERISTICS
(At TA = +25℃, VS = +5V, RL = 500kΩ connected to VS/2 and VOUT = VS/2, unless otherwise noted.)
PARAMETER
TYP
MAX
UNITS
VOS
1
3.5
mV
Input Bias Current
IB
3
pA
Input Offset Current
IOS
3
pA
ΔVOS/ΔT
2
μV/℃
Quiescent Current/Amplifier
IQ
5.5
μA
Open-Loop Voltage Gain
GV
Input Offset Voltage
Input Offset Voltage Drift
SYMBOL
Common Mode Rejection Ratio
CMRR
Power Supply Rejection Ratio
PSRR
Output Current
Output Voltage Swing
Gain-Bandwidth Product
ISOURCE
ISINK
MIN
VO = +0.015V to +4.985V, RL = 500kΩ
90
110
VO = +0.1V to +4.9V, RL = 100kΩ
88
108
VS = +5.5V, -0.1V < VCM < +5.6V
60
87
VS = +5.5V, -0.1V < VCM < +4V
70
114
VS = +2.5V to +5.5V, VCM = +0.5V
65
94
61
87
60
76
4.990
4.997
RL = 10Ω to VS/2
VOH
dB
dB
dB
mA
0.005
GBP
150
kHz
0.05
V/μs
SR
Voltage Noise Density
en
RL = 100kΩ
f = 1kHz
85
f = 10kHz
44
0.010
V
VOL
Slew Rate
SG Micro Corp
www.sg-micro.com
CONDITIONS
nV/ Hz
JANUARY 2017
4
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
TYPICAL PERFORMANCE CHARACTERISTICS
At TA = +25℃, VS = +5V and RL = 500kΩ connected to VS/2, unless otherwise noted.
Large Signal Step Response
Output Voltage (500mV/div)
Output Voltage (50mV/div)
Small Signal Step Response
V S = 5V
CL = 100pF
RL = 100kΩ
V S = 5V
CL = 100pF
RL = 100kΩ
Time (100μs/div)
Time (50μs/div)
CMRR and PSRR vs. Frequency
80
75
CMRR
70
65
60
55
50
PSRR
45
Maximum Output Voltage vs. Frequency
6
Output Voltage (V P-P)
CMRR and PSRR (dB
85
40
5
V S = 5.5V
4
V S = 5V
3
2
V S = 2.5V
1
0
0.01
0.1
1
10
100
1000
1
Input Voltage Noise Spectral Density vs. Frequency
120
60
100
Voltage Noise (nV/ √Hz)
Small-Signal Overshoot (%)
Small-Signal Overshoot vs. Load Capacitance
70
G = +1
RL = 500kΩ
40
30
20
G = -1
RFB = 560kΩ
10
100
Frequency (kHz)
Frequency (kHz)
50
10
0
80
60
40
20
0
10
100
Load Capacitance (pF)
SG Micro Corp
www.sg-micro.com
1000
0.1
1
10
100
Frequency (kHz)
JANUARY 2017
5
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
At TA = +25℃, VS = +5V, and RL = 500kΩ connected to VS/2, unless otherwise noted.
Open-Loop Gain vs. Temperature
9
140
8
130
Open–Loop Gain (dB)
Supply Current (μA)
Supply Current vs. Temperature
7
6
5
4
3
RL = 100kΩ
120
110
RL = 500kΩ
100
90
80
2
-50
-25
0
25
50
75
-50
100 125 150
-25
0
Temperature (℃)
75
100 125 150
140
100
120
CMRR_L
90
PSRR (dB)
CMRR (dB)
50
PSRR vs. Temperature
CMRR vs. Temperature
110
80
CMRR_H
70
100
80
60
40
60
20
-50
50
-50
-25
0
25
50
75
100 125 150
-25
0
Temperature (℃)
Output Voltage vs. Output Current
6
-55℃
4
3
V S = 5V
2
-55℃
1
135℃
0
0
20
40
60
25℃
80
Sinking Current
100 120 140 160
Output Current (mA)
SG Micro Corp
www.sg-micro.com
Output Voltage vs. Output Current
Sourcing Current
135℃
3.0
Output Voltage (V)
25℃
25 50 75 100 125 150
Temperature (℃)
3.5
Sourcing Current
135℃
5
Output Voltage (V)
25
Temperature (℃)
25℃
2.5
-55℃
2.0
V S = 3V
1.5
1.0
0.5
135℃
0.0
0
10
20
30
25℃
-55℃
Sinking Current
40
50
60
Output Current (mA)
JANUARY 2017
6
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
At TA = +25℃, VS = +5V, and RL = 500kΩ connected to VS/2, unless otherwise noted.
Supply Current vs. Supply Voltage
7
100
6
Supply Current (μA)
Short-Circuit Current (mA)
Short-Circuit Current vs. Supply Voltage
120
80
60
40
20
0
5
4
3
2
1
0
-20
-1
0
1
2
3
4
5
Supply Voltage (V)
SG Micro Corp
www.sg-micro.com
6
7
0
1
2
3
4
5
Supply Voltage (V)
6
7
JANUARY 2017
7
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
APPLICATION NOTES
Driving Capacitive Loads
The SGM8521/2/4 can directly drive 250pF in
unity-gain without oscillation. The unity-gain follower
(buffer) is the most sensitive configuration to capacitive
loading. Direct capacitive loading reduces the phase
margin of amplifiers and this result in ringing or even
oscillation. Applications that require greater capacitive
driving capability should use an isolation resistor
between the output and the capacitive load like the
circuit in Figure 1. The isolation resistor RISO and the
load capacitor CL form a zero to increase stability. The
bigger the RISO resistor value, the more stable VOUT will
be. Note that this method results in a loss of gain
accuracy because RISO forms a voltage divider with the
RLOAD.
For non-buffer configuration, there are two other ways
to increase the phase margin: (a) by increasing the
amplifier’s gain or (b) by placing a capacitor in parallel
with the feedback resistor to counteract the parasitic
capacitance associated with inverting node.
Power-Supply Bypassing and Layout
The SGM8521/2/4 family operates from either a single
+2.1V to +5.5V supply or dual ±1.05V to ±2.75V
supplies. For single-supply operation, bypass the
power supply +VS with a 0.1µF ceramic capacitor which
should be placed close to the +VS pin. For dual-supply
operation, both the +VS and the -VS supplies should be
bypassed to ground with separate 0.1µF ceramic
capacitors. 2.2µF tantalum capacitor can be added for
better performance.
+VS
+VS
RISO
SGM8521
VOUT
VIN
10μF
10μF
0.1μF
CL
0.1μF
Vn
Figure 1. Indirectly Driving Heavy Capacitive Load
Vn
An improved circuit is shown in Figure 2. It provides DC
accuracy as well as AC stability. RF provides the DC
accuracy by connecting the inverting signal with the
output. 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 phase margin in the
overall feedback loop.
CF
SGM8521
VOUT
VOUT
SGM8521
Vp
10μF
Vp
0.1μF
-VS (GND)
-VS
Figure 3. Amplifier with Bypass Capacitors
RF
RISO
SGM8521
VIN
VOUT
CL
RL
Figure 2. Indirectly Driving Heavy Capacitive Load with
DC Accuracy
SG Micro Corp
www.sg-micro.com
JANUARY 2017
8
150kHz, 5.5μA, Rail-to-Rail I/O
CMOS Operational Amplifiers
SGM8521/2/4
APPLICATION NOTES (continued)
Differential Amplifier
Low-Pass Active Filter
The circuit shown in Figure 4 performs the difference
function. If the resistor ratios are equal to (R4/R3 = R2/R1),
then VOUT = (Vp - Vn) × R2/R1 + VREF.
The low-pass filter shown in Figure 6 has a DC gain of
(-R2/R1) and the -3dB corner frequency is 1/2πR2C.
Make sure the filter bandwidth is within the bandwidth
of the amplifier. The large values of feedback resistors
can couple with parasitic capacitance and cause
undesired effects such as ringing or oscillation in
high-speed amplifiers. Keep resistor values as low as
possible and consistent with output loading
consideration.
R2
R1
Vn
SGM8521
VOUT
Vp
R3
C
R4
R2
VREF
R1
VIN
Figure 4. Differential Amplifier
SGM8521
VOUT
Instrumentation Amplifier
The circuit in Figure 5 performs the same function as
that in Figure 4 but with a high input impedance.
R3 = R1 // R2
R2
Figure 6. Low-Pass Active Filter
R1
Vn
SGM8521
SGM8521
Vp
SGM8521
R3
VOUT
R4
VREF
Figure 5. Instrumentation Amplifier
SG Micro Corp
www.sg-micro.com
JANUARY 2017
9
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOT-23-5
1.90
D
e1
E1
2.59
E
0.99
b
e
0.69
0.95
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
θ
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
c
0.2
Dimensions
In Inches
MIN
MAX
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
0.950 BSC
e1
SG Micro Corp
www.sg-micro.com
0.037 BSC
1.900 BSC
0.075 BSC
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
TX00033.000
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOIC-8
0.6
D
e
2.2
E1
E
5.2
b
1.27
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
c
θ
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
1.350
1.750
0.053
0.069
A1
0.100
0.250
0.004
0.010
A2
1.350
1.550
0.053
0.061
b
0.330
0.510
0.013
0.020
c
0.170
0.250
0.006
0.010
D
4.700
5.100
0.185
0.200
E
3.800
4.000
0.150
0.157
E1
5.800
6.200
0.228
0.244
e
SG Micro Corp
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1.27 BSC
0.050 BSC
L
0.400
1.270
0.016
0.050
θ
0°
8°
0°
8°
TX00010.000
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
MSOP-8
b
E1
E
4.8
1.02
e
0.41
0.65
RECOMMENDED LAND PATTERN (Unit: mm)
D
L
A
A1
c
θ
A2
Symbol
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
0.820
1.100
0.032
0.043
A1
0.020
0.150
0.001
0.006
A2
0.750
0.950
0.030
0.037
b
0.250
0.380
0.010
0.015
c
0.090
0.230
0.004
0.009
D
2.900
3.100
0.114
0.122
E
2.900
3.100
0.114
0.122
E1
4.750
5.050
0.187
e
SG Micro Corp
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0.650 BSC
0.199
0.026 BSC
L
0.400
0.800
0.016
0.031
θ
0°
6°
0°
6°
TX00014.000
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOIC-14
D
E
5.2
E1
2.2
e
b
0.6
1.27
RECOMMENDED LAND PATTERN (Unit: mm)
L1
R1
R
A3
A A2
h
L2
θ
A1
Symbol
h
L
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.004
0.010
A2
1.25
1.65
0.049
0.065
A3
0.55
0.75
0.022
0.030
b
0.36
0.49
0.014
0.019
D
8.53
8.73
0.336
0.344
E
5.80
6.20
0.228
0.244
E1
3.80
4.00
0.150
e
L
1.27 BSC
0.45
0.157
0.050 BSC
0.80
0.018
0.032
L1
1.04 REF
0.040 REF
L2
0.25 BSC
0.01 BSC
R
0.07
R1
0.07
h
0.30
0.50
0.012
0.020
θ
0°
8°
0°
8°
SG Micro Corp
www.sg-micro.com
0.003
0.003
TX00011.001
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TSSOP-14
D
E
E1
5.94
1.78
e
b
0.42
0.65
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
θ
A2
Symbol
c
H
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
1.200
0.047
A
A1
0.050
0.150
0.002
0.006
A2
0.800
1.050
0.031
0.041
b
0.190
0.300
0.007
0.012
c
0.090
0.200
0.004
0.008
D
4.860
5.100
0.191
0.201
E
4.300
4.500
0.169
0.177
E1
6.250
6.550
0.246
e
L
0.650 BSC
0.500
H
θ
SG Micro Corp
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0.700
0.02
7°
1°
0.25 TYP
1°
0.258
0.026 BSC
0.028
0.01 TYP
7°
TX00019.001
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
W
P0
Q1
Q2
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
Q3
Q4
B0
Reel Diameter
K0
A0
P1
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel
Diameter
Reel Width
W1
(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P0
(mm)
P1
(mm)
P2
(mm)
W
(mm)
Pin1
Quadrant
SOT-23-5
7″
9.5
3.20
3.20
1.40
4.0
4.0
2.0
8.0
Q3
SOIC-8
13″
12.4
6.40
5.40
2.10
4.0
8.0
2.0
12.0
Q1
MSOP-8
13″
12.4
5.20
3.30
1.50
4.0
8.0
2.0
12.0
Q1
SOIC-14
13″
16.4
6.60
9.30
2.10
4.0
8.0
2.0
16.0
Q1
TSSOP-14
13″
12.4
6.95
5.60
1.20
4.0
8.0
2.0
12.0
Q1
SG Micro Corp
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TX10000.000
DD0001
Package Type
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Pizza/Carton
7″ (Option)
368
227
224
8
7″
442
410
224
18
13″
386
280
370
5
SG Micro Corp
www.sg-micro.com
DD0002
Reel Type
TX20000.000
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