MIC820
Micrel
MIC820
Teeny™
Ultra Low Power Op Amp
Final Information
General Description
The MIC820 is a rail-to-rail output, operational amplifier in
Teeny™
SC70 packaging. The MIC820 provides 5MHz, -3dB
bandwidth while consuming an incredibly low 22µA supply
current.
The SC70 packaging achieves significant board space sav-
ings over devices packaged in SOT-23 or MSOP-8 packag-
ing. The SC70 occupies approximately half the board area of
a SOT-23 package.
Features
•
•
•
•
•
•
•
•
Teeny™
SC70 packaging
5MHz, –3dB bandwidth product
4MHz gain-bandwidth product
22µA supply current
Rail-to-Rail output
Ground sensing at input common mode to GND
Common mode to GND
Drive large capactive loads
Applications
• Portable equipment
Ordering Information
Part Number
MIC820BC5
Marking Junction Temp. Range*
A25
–40°C to +85°C
Package
SC70-5
Pin Configuration
IN–
3
Functional Pinout
V–
2
IN+
1
IN–
V–
2
IN+
1
Part
Identification
3
A25
4
5
4
5
OUT
V+
OUT
V+
SC-70
Teeny
is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
December 2000
1
MIC820
MIC820
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
– V
V–
) ........................................ +6.0V
Differentail Input Voltage (V
IN+
– V
IN–
)
................. +6.0lV
Input Voltage (V
IN+
– V
IN–
) .............. V
V+
+ 0.3V, V
V–
–0.3V
Lead Temperature (soldering, 5 sec.) ....................... 260°C
Output Short Circuit Current Duration .................. Indefinite
Storage Temperature (T
S
) ........................................ 150°C
ESD Rating,
Note 3
Operating Ratings
(Note 2)
Supply Voltage (V
S
) ................................ +4.75V to +5.25V
Ambient Temperature Range ..................... –40°C to +85°C
Package Thermal Resistance ............................... 450°C/W
Electrical Characteristics (0V to 5V)
V
V+
= +5V, V
V–
= 0V, V
CM
= V+/2; R
L
= 1MΩ; T
A
= 25°C,
bold
values indicate –40°C
≤
T
A
≤
+85°C; unless noted.
Symbol
V
OS
I
B
I
OS
V
CM
CMRR
PSRR
A
VOL
V
OUT
V
OUT
BW
GBW
SR
I
SC
I
GND
Parameter
Input Offset Voltage
Input Offset Voltage Temp Coefficient
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing
Minimum Output Voltage Swing
–3db Bandwidth
Gain-Bandwidth Product
Slew Rate
Short-Circuit Output Current
Source
Sink
Supply Current
V
CC
=
±2.5V,
V
OUT
= 0V
V
CC
=
±2.5V,
V
OUT
= –2.5V
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Pin 4 is ESD sensetive
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to increase.
Supply Voltage change of 1V.
Condition
Min
Typ
1
13
0.165
0.1
Max
15
Units
mV
µV/°C
5
5
V
CC
-2.5
nA
nA
V
dB
dB
dB
V
mV
MHz
MHz
V/µs
mA
mA
µA
µA
CMRR > 35dB
0 < V
CM
< 2.5V
Note 5
R
L
= 1M, –0.5 < V
OUT
< 3.5V
R
L
= 200k
R
L
= 200k
0
35
40
60
4.95
0
50
70
72
5
50
5
4
5
2
0.15
2.85
0.26
22
35
35
60
MIC820
2
December 2000
MIC820
Micrel
Typical Characteristics
Open Loop Gain
vs. Temperature
75
OFFSET VOLTAGE (mV)
Offset Voltage
vs. Temperature
2.0
SUPPLY CURRENT (µA)
Supply Current
vs. Temperature
30
25
20
15
10
5
0
-40 -20 0
20 40 60
TEMPERATURE (°C)
80
OPEN LOOP GAIN
74
73
72
71
70
69
68
67
66
65
-40 -20 0
20 40 60
TEMPERATURE (°C)
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-40 -20 0
20 40 60
TEMPERATURE (°C)
80
80
MIC820 + PSRR
vs. Frequency
80
70
BIS CURRENT (pA)
Bias Current
vs. Temperature
40
35
30
25
20
15
10
5
CMRR (dB)
MIC820 Common Mode
Rejection Ratio
60
50
40
30
20
10
1x10
2
1x10
3
1x10
4
1x10
5
PSRR (dB)
60
50
40
30
1x10
2
1x10
3
1x10
4
1x10
5
1x10
6
80
FREQUENCY (Hz)
FREQUENCY (Hz)
+10
INPUT OFFSET VOLTAGE (mV)
0
2.5
2.5
2.5
85°C
20°C
-40°C
–10
2.5
SUPPLY VOLTAGE (V)
4.0
December 2000
3
1x10
6
20
0
-40 -20 0
20 40 60
TEMPERATURE (°C)
0
MIC820
MIC820
Micrel
Functional Characteristics
Small-Signal Pulse Reponse
A
V
=1 C
L
=3pF
Small-Signal Pulse Reponse
A
V
=1 C
L
=100pF
+100
+100
+50
+50
VOUT
(mV)
-50
VOUT
(mV)
0
0
-50
-100
-100
0
400
800
1200
1600
2000
(ns)
2400
2800
3200
3600
4000
0
4
8
12
16
20
(µs)
24
28
32
36
40
Large-Signal Pulse Reponse
A
V
=1 C
L
=10pF
+20
+10
+100
Gain Bandwidth of MIC820
0
GAIN (dB)
PHASE (°)
10M
+50
–10
–20
–30
–40
–90
0
VOUT
(mV)
0
-50
-100
–50
–180
0
4
8
12
16
20
(µs)
24
28
32
36
40
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
Closed Loop Frequency Response AV = 1
Closed Loop Gain (A
V
= +1)
vs. Load Capacitance
0
–10
+15
+10
GAIN (dB)
–30
–40
–50
–60
0
PHASE (°)
GAIN (dB)
–20
+5
0
–5
–10
–15
0.1µF
0.01µF
1000pF
470pF
100pF
3pF
–90
–180
1k
10k
100k
FREQUENCY (Hz)
1M
10M
1k
10k
100k
FREQUENCY (Hz)
1M
MIC820
4
December 2000
MIC820
Micrel
Applications Information
Power Supply Bypassing
Regular supply bypassing techniques are recommended. A
10µF capacitor in parallel with a 0.1µF capacitor on both the
positive and negative supplies are ideal. For best perfor-
mance all bypassing capacitors should be located as close to
the op amp as possible and all capacitors should be low ESL
(equivalent series inductance), ESR (equivalent series resis-
tance). Surface-mount ceramic capacitors are ideal.
December 2000
5
MIC820
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