MIC918
Micrel
MIC918
51MHz Low-Power SOT-23-5/SC-70 Op Amp
Final Information
General Description
The MIC918 is a high-speed operational amplifier with a
gain-bandwidth product of 51MHz. The part is unity gain
stable. Ithas a very low 550A supply current, and features
the IttyBitty
™
SOT-23-5 package and SC-70 package.
Supply voltage range is from
±2.5V
to
±9V,
allowing the
MIC918 to be used in low-voltage circuits or applications
requiring large dynamic range.
The MIC918 is stable driving any capacitative load and
achieves excellent PSRR and CMRR, making it much
easier to use than most conventional high-speed devices.
Low supply voltage, low power consumption, and small
packing make the MIC918 ideal for portable equipment.
The ability to drive capacitative loads also makes it pos-
sible to drive long coaxial cables.
Features
• 51MHz gain bandwidth product
• 550µA supply current
• SOT-23-5 or SC-70 packages
• 1500V/µs slew rate
• drives any capacitive load
• Unity gain stable
Applications
• Video
• Imaging
• Ultrasound
• Portable equipment
• Line drivers
Ordering Information
Part Number
MIC918BM5
MIC918BC5
Junction Temp. Range
–40°C to +85°C
–40°C to +85°C
Package
SOT-23-5*
SC-70
* Contact factory about SOT-23-5 package.
Pin Configuration
IN— V— IN+
3
2
1
Functional Pinout
IN— V— IN+
Part
Identification
3
2
1
A30
4
5
4
5
OUT
V+
OUT
V+
SOT-23-5 or SC-70
SOT-23-5 or SC-70
Pin Description
Pin Number
1
2
3
4
5
Pin Name
IN+
V–
IN–
OUT
V+
Pin Function
Noninverting Input
Negative Supply (Input)
Inverting Input
Output: Amplifier Output
Positive Supply (Input)
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 2001
1
MIC918
MIC918
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
– V
V–
) ........................................... 20V
Differentail Input Voltage (V
IN+
– V
IN–
)
.......... 4V,
Note 3
Input Common-Mode Range (V
IN+
, V
IN–
) .......... V
V+
to V
V–
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Storage Temperature (T
S
) ........................................ 150°C
ESD Rating,
Note 4
................................................... 1.5kV
Operating Ratings
(Note 2)
Supply Voltage (V
S
) .......................................
±2.5V
to
±9V
Junction Temperature (T
J
) ......................... –40°C to +85°C
Package Thermal Resistance .............................................
SOT-23-5 .......................................................... 260°C/W
SC-70-5 ............................................................. 450°C/W
Electrical Characteristics (
±
5V)
V+ = +5V, V– = –5V, V
CM
= 0V, R
L
= 10MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C; unless noted.
Symbol
V
OS
V
OS
I
B
I
OS
V
CM
CMRR
PSRR
A
VOL
V
OUT
Parameter
Input Offset Voltage
V
OS
Temperature Coefficient
Input Bias Current
Input Offset Current
Input Common-Mode Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
CMRR > 72dB
–2.5V < V
CM
< +2.5V
±3.5V
< V
S
<
±9V
R
L
= 2k, V
OUT
=
±2V
R
L
= 100Ω, V
OUT
=
±1V
Maximum Output Voltage Swing
positive, R
L
= 2kΩ
negative, R
L
= 2kΩ
positive, R
L
= 200Ω
negative, R
L
= 200Ω,
Note 5
GBW
PM
BW
SR
I
SC
I
S
Unity Gain-Bandwidth Product
Phase Margin
–3dB Bandwidth
Slew Rate
Short-Circuit Output Current
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
positive SR = 450V/µs
source
sink
Supply Current
Input Voltage Noise
Input Current Noise
No Load
f = 10kHz
f = 10kHz
45
20
+1.5
+3.0
–3.25
75
95
65
85
104
82
85
3.6
–3.6
3.0
–2.5
45
54
95
850
63
45
0.55
10
0.8
0.80
–1.0
–3.0
Condition
Min
Typ
0.43
1
0.26
0.04
0.6
0.3
+3.25
Max
5
Units
mV
µV/°C
µA
µA
V
dB
dB
dB
dB
V
V
V
V
MHz
°
MHz
V/µs
mA
mA
mA
nV/√Hz
pA/√Hz
Electrical Characteristics
V+ = +9V, V– = –9V, V
CM
= 0V, R
L
= 10MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C; unless noted
Symbol
V
OS
V
OS
I
B
I
OS
V
CM
CMRR
PSRR
Parameter
Input Offset Voltage
Input Offset Voltage
Temperature Coefficient
Input Bias Current
Input Offset Current
Input Common-Mode Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
CMRR > 75dB
–6.5V < V
CM
< +6.5V
±3.5V
< V
S
<
±9V
–7.25
60
95
91
104
Condition
Min
Typ
0.3
1
0.23
0.04
0.60
0.3
+7.25
Max
5
Units
mV
µV/°C
µA
µA
V
dB
dB
MIC918
2
October 2001
MIC918
Symbol
A
VOL
V
OUT
GBW
PM
BW
SR
I
SC
I
S
Parameter
Large-Signal Voltage Gain
Condition
R
L
= 2k, V
OUT
=
±2V
R
L
= 100Ω, V
OUT
=
±1V
Maximum Output Voltage Swing
positive, R
L
= 2kΩ
negative, R
L
= 2kΩ
Unity Gain-Bandwidth Product
Phase Margin
–3dB Bandwidth
Slew Rate
Short-Circuit Output Current
A
V
= 2, R
L
= 470Ω
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
positive SR = 450V/µs
source
sink
Supply Current
Input Voltage Noise
Input Current Noise
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Micrel
Min
75
Typ
84
93
6.5
7.5
–7.5
51
55
109
1500
50
30
65
50
0.55
10
0.8
0.8
–6.2
Max
Units
dB
dB
V
V
MHz
°
MHz
V/µs
mA
mA
mA
nV/√Hz
pA/√Hz
R
L
= 1kΩ
No Load
f = 10kHz
f = 10kHz
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to change).
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in “Typical Characteristics.”
October 2001
3
MIC918
MIC918
Micrel
Typical Characteristics
Offset Voltage
vs. Temperature
1.25
SUPPLY CURRENT (mA)
Supply Current
vs. Temperature
0.60
V± =
±9V
V± =
±5V
V± =
±2.5V
SUPPLY CURRENT (µA)
Supply Current
vs. Supply Voltage
0.62
0.60
0.58
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.42
0.40
2.5
OFFSET VOLTAGE (mV)
1.2
1.15
1.1
1.05
1
0.95
V± =
±2.5V
0.55
0.50
0.45
0.40
0.35
V± =
±5V
V± =
±9V
+85°C
+25°C
–40°C
0.9
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
0.30
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
3.8
5.1
6.4
7.7
SUPPLY VOLTAGE (V)
9
Offset Voltage vs.
Common-Mode Voltage
2.2
2
V± =
±2.5V
1.8
1.6
–40°C
1.4
1.2
+25°C
1
0.8
0.6
0.4
0.2
+85°C
0
-900 -540 -180 180 540 900
COMMON-MODE VOLTAGE (V)
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
OFFSET VOLTAGE (mV)
OFFSET VOLTAGE (mV)
Offset Voltage vs.
Common-Mode Voltage
OFFSET VOLTAGE (mV)
Offset Voltage vs.
Common-Mode Voltage
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
V± =
±9V
V± =
±5V
–40°C
+25°C
–40°C
+25°C
+85°C
1.48
2.96
4.44
5.92
-4.44
-2.96
-1.48
0
7.40
+85°C
0.68
1.36
2.04
2.72
-2.04
-1.36
-0.68
0
3.40
-3.40
-2.72
COMMON-MODE VOLTAGE (V)
Positive Slew Rate vs.
Load Capacitance
800
700
V+ =
±9V
SLEW RATE (V/µs)
Negative Slew Rate vs.
Load Capacitance
1600
1400
1200
1000
800
600
400
200
V+ =
±9V
SLEW RATE (V/µs)
500
450
400
350
300
250
200
150
100
50
-7.40
-5.92
COMMON-MODE VOLTAGE (V)
Positive Slew Rate vs.
Load Capacitance
V+ =
±5V
SLEW RATE (V/µs)
600
500
400
300
200
100
1000
900
1000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Negative Slew Rate vs.
Load Capacitance
900
800
700
600
500
400
300
200
100
0
POSITIVE SLEW RATE (V/µs)
Positive Slew Rate
vs. Supply Voltage
NEGATIVE SLEW RATE (V/µs)
800
700
600
500
400
300
200
100
0
0
1
2 3 4 5 6 7 8
SUPPLY VOLTAGE (±V)
9
1800
1600
1400
1200
1000
800
600
400
200
0
0
1
Negative Slew Rate
vs. Supply Voltage
V+ =
±5V
SLEW RATE (V/µs)
2 3 4 5 6 7 8
SUPPLY VOLTAGE (±V)
LOAD CAPACITANCE (pF)
MIC918
1000
0
100
200
300
400
500
600
700
800
900
4
October 2001
900
1000
9
0
100
0
200
300
400
500
600
700
800
900
100
200
300
400
500
600
700
800
0
100
200
300
400
500
600
700
800
0
0
0
MIC918
Micrel
Voltage Noise
90
CURRENT NOISE (pA/√Hz)
Current Noise
6
5
4
3
2
1
0
10
100
1000 10000 100000
FREQUENCY (Hz)
NOISE VOLTAGE (nV/√Hz)
80
70
60
50
40
30
20
10
0
10
100
1000 10000 100000
FREQUENCY (Hz)
October 2001
5
MIC918
嵌入式系统
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