October 2001
1
MIC918
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
TM
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
550
A supply current
SOT-23-5 or SC-70 packages
1500V/
s slew rate
drives any capacitive load
Unity gain stable
Applications
Video
Imaging
Ultrasound
Portable equipment
Line drivers
Ordering Information
Part Number
Junction Temp. Range
Package
MIC918BM5
40
C to +85
C
SOT-23-5*
MIC918BC5
40
C to +85
C
SC-70
* Contact factory about SOT-23-5 package.
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Pin Description
Pin Number
Pin Name
Pin Function
1
IN+
Noninverting Input
2
V
Negative Supply (Input)
3
IN
Inverting Input
4
OUT
Output: Amplifier Output
5
V+
Positive Supply (Input)
Pin Configuration
IN+
V--
OUT
IN--
1
3
4
5
2
V+
A30
Part
Identification
SOT-23-5 or SC-70
Functional Pinout
IN+
V--
OUT
IN--
1
3
4
5
2
V+
SOT-23-5 or SC-70
MIC918
Micrel
MIC918
2
October 2001
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
= 10M
; T
J
= 25
C, bold values indicate 40
C
T
J
+85
C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OS
Input Offset Voltage
0.43
5
mV
V
OS
V
OS
Temperature Coefficient
1
V/
C
I
B
Input Bias Current
0.26
0.6
A
I
OS
Input Offset Current
0.04
0.3
A
V
CM
Input Common-Mode Range
CMRR > 72dB
3.25
+3.25
V
CMRR
Common-Mode Rejection Ratio
2.5V < V
CM
< +2.5V
75
85
dB
PSRR
Power Supply Rejection Ratio
3.5V < V
S
<
9V
95
104
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 2k, V
OUT
=
2V
65
82
dB
R
L
= 100
, V
OUT
=
1V
85
dB
V
OUT
Maximum Output Voltage Swing
positive, R
L
= 2k
+3.0
3.6
V
negative, R
L
= 2k
3.6
3.0
V
positive, R
L
= 200
+1.5
3.0
V
negative, R
L
= 200
, Note 5
2.5
1.0
V
GBW
Unity Gain-Bandwidth Product
45
MHz
PM
Phase Margin
54
BW
3dB Bandwidth
95
MHz
SR
Slew Rate
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
850
V/
s
positive SR = 450V/
s
I
SC
Short-Circuit Output Current
source
45
63
mA
sink
20
45
mA
I
S
Supply Current
No Load
0.55
0.80
mA
Input Voltage Noise
f = 10kHz
10
nV/
Hz
Input Current Noise
f = 10kHz
0.8
pA/
Hz
Electrical Characteristics
V+ = +9V, V = 9V, V
CM
= 0V, R
L
= 10M
; T
J
= 25
C, bold values indicate 40
C
T
J
+85
C; unless noted
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OS
Input Offset Voltage
0.3
5
mV
V
OS
Input Offset Voltage
1
V/
C
Temperature Coefficient
I
B
Input Bias Current
0.23
0.60
A
I
OS
Input Offset Current
0.04
0.3
A
V
CM
Input Common-Mode Range
CMRR > 75dB
7.25
+7.25
V
CMRR
Common-Mode Rejection Ratio
6.5V < V
CM
< +6.5V
60
91
dB
PSRR
Power Supply Rejection Ratio
3.5V < V
S
<
9V
95
104
dB
October 2001
3
MIC918
MIC918
Micrel
Symbol
Parameter
Condition
Min
Typ
Max
Units
A
VOL
Large-Signal Voltage Gain
R
L
= 2k, V
OUT
=
2V
75
84
dB
R
L
= 100
, V
OUT
=
1V
93
dB
V
OUT
Maximum Output Voltage Swing
positive, R
L
= 2k
6.5
7.5
V
negative, R
L
= 2k
7.5
6.2
V
GBW
Unity Gain-Bandwidth Product
R
L
= 1k
51
MHz
PM
Phase Margin
55
BW
3dB Bandwidth
A
V
= 2, R
L
= 470
109
MHz
SR
Slew Rate
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
1500
V/
s
positive SR = 450V/
s
I
SC
Short-Circuit Output Current
source
50
65
mA
sink
30
50
mA
I
S
Supply Current
No Load
0.55
0.8
mA
Input Voltage Noise
f = 10kHz
10
nV/
Hz
Input Current Noise
f = 10kHz
0.8
pA/
Hz
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3.
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to change).
Note 4.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 5.
Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in "Typical Characteristics."
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