July 2001
1
MIC861
MIC861
Micrel
MIC861
TeenyTM Ultra Low Power Op Amp
Final Information
General Description
The MIC861 is a rail-to-rail output, input common-mode to
ground, operational amplifier in
TeenyTM SC70 packaging.
The MIC861 provides 400kHz gain-bandwidth product while
consuming an incredibly low 4.6
A 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
TeenyTM SC70 packaging
400kHz gain-bandwidth product
650kHz, 3dB bandwidth
4.6
A supply current
Rail-to-Rail output
Ground sensing at input (common mode to GND)
Drives large capactive loads (1000pF)
Unity gain stable
Applications
Portable equipment
PDAs
Pagers
Cordless Phones
Consumer Electronics
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Teeny is a trademark of Micrel, Inc.
Ordering Information
Part Number
Marking
Ambient Temp. Range*
Package
MIC861BC5
A33
40
C to +85
C
SC70-5
Pin Configuration
OUT
V+
IN--
IN+
1
3
4
5
2
V--
A33
Part
Identification
SC-70
Functional Pinout
OUT
V+
IN--
IN+
1
3
4
5
2
V--
MIC861
Micrel
MIC861
2
July 2001
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
V) ......................................... +6.0V
Differentail Input Voltage (
V
IN+
V
IN
), Note 4 ...... +6.0V
Input Voltage (V
IN+
V
IN
) .................. V
+
+ 0.3V, 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+ V) ........................ +2.43V to +5.25V
Ambient Temperature Range ..................... 40
C to +85
C
Package Thermal Resistance ............................... 450
C/W
Electrical Characteristics
V+ = +2.7V, V = 0V, V
CM
= V+/2; R
L
= 500k
to V+/2; T
A
= 25
C, unless otherwise noted. Bold values indicate 40
C
T
A
+85
C.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OS
Input Offset Voltage
Note 5
10
2
10
mV
Input Offset Voltage Temp Coefficient
15
V/
C
I
B
Input Bias Current
20
pA
I
OS
Input Offset Current
10
pA
V
CM
Input Voltage Range
CMRR > 60dB
1.8
V
CMRR
Common-Mode Rejection Ratio
0 < V
CM
< 1.35V
45
77
dB
PSRR
Power Supply Rejection Ratio
Supply voltage change of 3V
50
83
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 100k, V
OUT
2V
peak to peak
60
74
dB
R
L
= 500k, V
OUT
2V
peak to peak
73
83
dB
V
OUT
Maximum Output Voltage Swing
R
L
= 500k
V+2mV
V+0.7mV
V
V
OUT
Minimum Output Voltage Swing
R
L
= 500k
V+0.2mV V+ 2mV
V
GBW
Gain-Bandwidth Product
R
L
= 200k
, C
L
= 2pF, V
OUT
= 0
350
kHz
BW
3dB Bandwidth
A
V
= 1, C
L
= 2pF, R
L
= 1M
500
kHz
SR
Slew Rate
A
V
= 1, C
L
= 2pF, R
L
= 1M
0.12
V/
s
I
SC
Short-Circuit Output Current
Source
6
mA
Sink
5
mA
I
S
Supply Current
No Load
4.2
9
A
V+= +5V, V= 0V, V
CM
= V+/2; R
L
= 500k
to V+/2; T
A
= 25
C, unless otherwise noted. Bold values indicate 40
C
T
A
+85
C.
V
OS
Input Offset Voltage
Note 5
10
2
10
mV
Input Offset Voltage Temp Coefficient
15
V/
C
I
B
Input Bias Current
20
pA
I
OS
Input Offset Current
10
pA
V
CM
Input Voltage Range
CMRR > 60dB
4.2
V
CMRR
Common-Mode Rejection Ratio
0 < V
CM
< 3.5V
60
80
dB
PSRR
Power Supply Rejection Ratio
Supply voltage change of 1V
45
85
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 100k, V
OUT
4.0V
peak to peak
60
76
dB
R
L
= 500k, V
OUT
4.0V
peak to peak
68
83
dB
V
OUT
Maximum Output Voltage Swing
R
L
= 500k
V+2mV
V+0.7mV
V
V
OUT
Minimum Output Voltage Swing
R
L
= 500k
V+0.7mV V+ 2mV
V
GBW
Gain-Bandwidth Product
R
L
= 200k
, C
L
= 2pF, V
OUT
= 0
400
kHz
BW
3dB Bandwidth
A
V
= 1, C
L
= 2pF, R
L
= 1M
650
kHz
July 2001
3
MIC861
MIC861
Micrel
Symbol
Parameter
Condition
Min
Typ
Max
Units
SR
Slew Rate
A
V
= 1, C
L
= 2pF, R
L
= 1M
0.12
V/
s
I
SC
Short-Circuit Output Current
Source
10
24
mA
Sink
10
24
mA
I
S
Supply Current
No Load
4.6
9
A
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.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Pin 4 is ESD sensetive
Note 4.
Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is
likely to increase.
Note 5.
The offset voltage distribution is centered around 0V. The typical offset number shown, is equal to the standard deviation of the voltage offset
distribution.
MIC861
Micrel
MIC861
4
July 2001
Test Circuits
50
RF
FET
PROBE
FET
PROBE
0.1F 10F
0.1F 10F
V
V+
20k
200k
MIC861
Test Circuit 1. A
V
= 11
50
RF
FET
PROBE
0.1F 10F
R
L
5k
0.1F 10F
V
V+
20k
20k
MIC861
FET
PROBE
Test Circuit 2:A
V
= 2
50
RF
MIC861
FET
PROBE
FET
PROBE
0.1F 10F
0.1F 10F
V
V+
Test Circuit 3. A
V
= 1
170k
48k
10k
10k
10
F
0.1
F
10
F
50
50
100
F
0.1
F
10
F
100
F
All resistors:
1% metal film
Output
Input
V+
V--
MIC861
BNC
BNC
Test Circuit 5. Positive Power Supply Rejection Ratio Measurement
50
FET
PROBE
FET
PROBE
0.1F 10F
50
0.1F 10F
V
RF
V+
20k
20k
MIC861
Test Circuit 4. A
V
= 1
July 2001
5
MIC861
MIC861
Micrel
DC Performance Characteristics
0
1
2
3
4
5
0
5
10
15
20
25
30
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current
85
C
25
C
-40
C
Sinking
0
1
2
3
4
5
0
5
10 15 20 25 30 35 40
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage vs.
Output Current
85
C
25
C
-40
C
-
-
-
-
-
-
-
-
-
Sourcing
0
5
10
15
20
25
30
0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
OUTPUT CURRENT (mA)
SUPPLY VOLTAGE (
V)
Short Circuit Current vs.
Supply Voltage
85
C
25
C
-40
C
Sourcing
0
5
10
15
20
25
30
0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
OUTPUT CURRENT (mA)
SUPPLY VOLTAGE (
V)
Short Circuit Current vs.
Supply Voltage
85
C
25
C
-40
C
Sinking
0.5
0.6
0.7
0.8
0.9
1
1.1
0
0.5
1
1.5
2
2.5
OFFSET VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
Offset Voltage vs.
Common-Mode Voltage
85
C
40
C
25
C
V+ = 2.7V
0.5
0.6
0.7
0.8
0.9
1
1.1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OFFSET VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
Offset Voltage vs.
Common-Mode Voltage
40
C
85
C
25
C
V+ = 5V
0
1
2
3
4
5
6
7
8
9
0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
OFFSET VOLTAGE (V)
SUPPLY VOLTAGE (V)
Offset Voltage vs.
Supply Voltage
85
C
25
C
-40
C
0
20
40
60
80
100
0.1
1
10
100
1000 10000
OPEN LOOP GAIN (dB)
RESISTIVE LOAD (k
)
Open Loop Gain vs.
Resistive Load
V+ = 5V
V+ = 2.7V
-6
-5
-4
-3
-2
-1
0
-40 -20
0
20
40
60
80 100
OFFSET VOLTAGE (mV)
TEMPERATURE (
C)
Offset Voltage vs.
Temperature
5V
2.7V
0
1
2
3
4
5
6
7
-40 -20
0
20
40
60
80 100
SUPPLY CURRENT (
A)
TEMPERATURE (
C)
Supply Current vs.
Temperature
5V
2.7V
0
5
10
15
20
25
30
-40 -20
0
20
40
60
80 100
SHORT CIRCUIT CURRENT (mA)
TEMPERATURE (
C)
Short Circuit Current
vs. Temperature
5V
2.7V
Sourcing
-30
-25
-20
-15
-10
-5
0
-40 -20
0
20
40
60
80 100
SHORT CIRCUIT CURRENT (mA)
TEMPERATURE (
C)
Short Circuit Current
vs. Temperature
5V
2.7V
Sinking
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