December 2001
1
MIC920
MIC920
Micrel
MIC920
80MHz Low-Power SC-70 Op Amp
Final Information
General Description
The MIC920 is a high-speed operational amplifier with a
gain-bandwidth product of 80MHz. The part is unity gain
stable. It has a very low 550
A supply current, and fea-
tures the SC-70 package.
Supply voltage range is from
2.5V to
9V, allowing the
MIC920 to be used in low-voltage circuits or applications
requiring large dynamic range.
The MIC920 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 MIC920 ideal for portable equipment.
The ability to drive capacitative loads also makes it pos-
sible to drive long coaxial cables.
Features
80MHz gain bandwidth product
115MHz 3dB bandwidth
550
A supply current
SC-70 or SOT-23-5 packages
3000V/
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
MIC920BM5
40
C to +85
C
SOT-23-5*
MIC920BC5
40
C to +85
C
SC-70
* Contact factory for availabilty of 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+
A37
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
MIC920
Micrel
MIC920
2
December 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
C
L
= 1.7pF
67
MHz
PM
Phase Margin
32
BW
3dB Bandwidth
Av = 1, R
L
= 1k
, C
L
= 1.7pF
100
MHz
SR
Slew Rate
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
1350
V/
s
positive SR = 1190V/
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
11
nV/
Hz
Input Current Noise
f = 10kHz
0.7
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
December 2001
3
MIC920
MIC920
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
C
L
= 1.7pF
80
MHz
PM
Phase Margin
30
BW
3dB Bandwidth
A
V
= 1, R
L
= 1k
, C
L
= 1.7pF
115
MHz
SR
Slew Rate
C=1.7pF, Gain=1, V
OUT
=5V, peak to peak,
3000
V/
s
negative SR = 2500V/
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."
MIC920
Micrel
MIC920
4
December 2001
Test Circuits
2k
10k
10k
10k
0.1
F
0.1
F
0.1
F
10
F
50
50
50
0.1
F
10
F
All resistors:
1% metal film
Output
Input
Input
V+
V
MIC920
4
5
3
1
2
BNC
BNC
BNC
PSRR vs. Frequency
R2 4k
S2
S1
0.1
F
10
F
0.1
F
10
F
10pF
10pF
V+
V
MIC920
4
5
3
1
2
BNC
R4 27k
R3 27k
R1
20
R5
20
100pF
To
Dynamic
Analyzer
Noise Measurement
0.1
F
10
F
0.1
F
10
F
V+
V
MIC920
4
5
3
1
2
BNC
R7c 2k
R7b 200
R7a 100
Input
R6
5k
R2
5k
R3
200k
R4
250
R5
5k
Output
R1 5k
BNC
All resistors 1%
V
V
R2
R1
R2
R
R4
OUT
ERROR
=
+
+
+
+
1
5
R7
CMRR vs. Frequency
V+
V
IN
V
MIC920
4
5
3
1
2
300
50
V
OUT
FET Probe
1k
C
L
0.1
F
10
F
0.1
F
10
F
Closed Loop Frequency Response Measurement
December 2001
5
MIC920
MIC920
Micrel
Typical Characteristics
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
-40 -20
0
20
40
60
80 100
OFFSET VOLTAGE (mV)
TEMPERATURE (
C)
Offset Voltage
vs. Temperature
V
=
2.5V
V
=
5V
V
=
9V
0.30
0.35
0.40
0.45
0.50
0.55
0.60
-40 -20
0
20
40
60
80 100
SUPPLY CURRENT (mA)
TEMPERATURE (
C)
Supply Current
vs. Temperature
V
=
2.5V
V
=
9V
V
=
5V
0.40
0.42
0.44
0.46
0.48
0.50
0.52
0.54
0.56
0.58
0.60
0.62
2.5
3.8
5.1
6.4
7.7
9
SUPPLY CURRENT (mA)
SUPPLY VOLTAGE (V)
Supply Current
vs. Supply Voltage
40
C
+85
C
+25
C
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
-900
-540
-180
180
540
900
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage vs.
Common-Mode Voltage
40
C
+85
C
+25
C
V
=
2.5V
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
-3.40
-2.72
-2.04
-1.36
-0.68
0
0.68
1.36
2.04
2.72
3.40
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage vs.
Common-Mode Voltage
40
C
+85
C
+25
C
V
=
5V
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
-7.40
-5.92
-4.44
-2.96
-1.48
0
1.48
2.96
4.44
5.92
7.40
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage vs.
Common-Mode Voltage
40
C
+85
C
+25
C
V
=
9V
40
44
48
52
56
60
64
68
72
76
80
84
2.0
3.4
4.8
6.2
7.6
9.0
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (V)
Short-Circuit Current vs.
Supply Voltage (Sourcing)
40
C
85
C
25
C
50
47
44
41
38
35
32
29
26
23
20
17
2.0
3.4
4.8
6.2
7.6
9.0
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (V)
Short-Circuit Current vs.
Supply Voltage (Sinking)
40
C
85
C
25
C
0
1
2
3
4
5
6
7
8
9
10
11
0
-8
-16
-24
-32
-40
-48
-56
-64
-72
-80
OUTOUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current (Sourcing)
40
C
85
C
25
C
V
=
9V
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
50
45
40
35
30
25
20
15
10
5
0
OUTOUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current (Sinking)
40
C
85
C
25
C
V
=
9V
-5.0
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
45.0
40.5
36.0
31.5
27.0
22.5
18.0
13.5
9.0
4.5
0
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current (Sinking)
25
C
85
C
40
C
V
=
5V
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
-8
-16
-24
-32
-40
-48
-56
-64
-72
-80
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current (Sourcing)
40
C
85
C
25
C
V
=
5V
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