September 2004
1
MIC862
MIC862
Micrel
MIC862
Dual Ultra Low Power Op Amp in SOT23-8
General Description
The MIC862 is a dual low power operational amplifier in
SOT23-8 package. It is designed to operate in the 2V to 5V
range, rail-to-rail output, with input common-mode to ground.
The MIC862 provides 3MHz gain-bandwidth product while
consuming only a 31
A/Channel supply current.
With low supply voltage and SOT23-8 packaging, MIC862
provides two channels as general-purpose amplifiers for
portable and battery-powered applications. Its package pro-
vides the maximum performance available while maintaining
an extremely slim form factor. The minimal power consump-
tion of this IC maximizes the battery life potential.
Features
SOT23-8 packaging
3MHz gain-bandwidth product
5MHz, 3dB bandwidth
31
A supply current
Rail-to-rail output
Ground sensing at input (common mode to GND)
Drive large capactive loads
Unity gain stable
Applications
Portable equipment
Medical Insrument
PDAs
Pagers
Cordless phones
Consumer electronics
Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
Ordering Information
Part Number
Marking
Ambient Temp. Range
Package
MIC862BM8
A34
40
C to +85
C
SOT23-8
MIC862YM8
A34
40
C to +85
C
SOT23-8
Pb-Free
Typical Application
50
0.1
F
10
F
100pF
510
1
/
2
MIC862
1
/
2
MIC862
V
OUT
V+
RF
Peak Detector Circuit for AM Radio
MIC862
Micrel
MIC862
2
September 2004
Pin Description
Pin Number
Pin Name
Pin Function
1
OUTA
Output: Amplifier A Output
2
INA
Amplifier A Inverting (Input)
3
INA+
Amplifier A Non-Inverting (Input)
4
V
Negative Supply
5
INB+
Amplifier B Non-Inverting (Input)
6
INB
Amplifier B Inverting (Input)
7
OUTB
Output: Amplifier B Output
8
V+
Positive Supply
Pin Configuration
1
OUTA
INA
INA+
V
8
V+
OUTB
INB
INB+
7
6
5
2
3
4
SOT23-8 (M8)
September 2004
3
MIC862
MIC862
Micrel
Absolute Maximum Ratings
(1)
Supply Voltage (V
V+
V) ......................................... +6.0V
Differential 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
(2)
Supply Voltage (V+ V) ............................. +2V to +5.25V
Ambient Temperature Range ..................... 40
C to +85
C
Package Thermal Resistance .......................... PCB boards
JA
(using 4 layer PCB) ................................. 100
C/W
JC
(using 4 layer PCB) ................................... 70
C/W
Electrical Characteristics
V+ = +2V, 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
6
0.1
6
mV
5
5
Differential Offset Voltage
0.5
mV
Input Offset Voltage Temp Coefficient
6
V/
C
I
B
Input Bias Current
10
pA
I
OS
Input Offset Current
5
pA
V
CM
Input Voltage Range (from V)
CMRR > 50dB
0.5
1
V
CMRR
Common-Mode Rejection Ratio
0 < V
CM
< 1V
45
75
dB
PSRR
Power Supply Rejection Ratio
Supply voltage change of 2V to 2.7V
50
78
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 5k
, V
OUT
= 1.4V
P-P
66
74
dB
R
L
= 100k
, V
OUT
= 1.4V
P-P
75
89
dB
R
L
= 500k
, V
OUT
= 1.4V
P-P
85
100
dB
V
OUT
Maximum Output Voltage Swing
R
L
= 5k
V+80mV V+55mV
V
R
L
= 500k
V+3mV
V+1.4mV
V
V
OUT
Minimum Output Voltage Swing
R
L
= 5k
V+14mV V+ 20mV
mV
R
L
= 500k
V+0.85mV V+ 3mV
mV
GBW
Gain-Bandwidth Product
R
L
= 20k
, C
L
= 2pF, Av = 11
2.1
MHz
PM
Phase Margin
R
L
= 20k
, C
L
= 2pF, Av = 11
57
BW
3dB Bandwidth
R
L
= 1M
, C
L
= 2pF, Av = 1
4.2
MHz
SR
Slew Rate
R
L
= 1M
, C
L
= 2pF, Av = 1,
2
V/
s
Positive Slew Rate = 1.5V/
s
I
SC
Short-Circuit Output Current
Source
1.8
2.6
mA
Sink
1.5
2.2
mA
I
S
Supply Current (per op amp)
No Load
27
43
A
Channel-to-Channel Crosstalk
Note 5
100
dB
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.
V
OS
Input Offset Voltage
6
0.1
6
mV
5
5
Differential Offset Voltage
0.5
mV
Input Offset Voltage Temp Coefficient
6
V/
C
I
B
Input Bias Current
10
pA
I
OS
Input Offset Current
5
pA
V
CM
Input Voltage Range
CMRR > 60dB
1
1.8
V
CMRR
Common-Mode Rejection Ratio
0 < V
CM
< 1.35V
65
83
dB
MIC862
Micrel
MIC862
4
September 2004
Symbol
Parameter
Condition
Min
Typ
Max
Units
PSRR
Power Supply Rejection Ratio
Supply voltage change of 2.7V to 3V
60
85
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 5k
, V
OUT
= 2V
P-P
65
77
dB
R
L
= 100k
, V
OUT
= 2V
P-P
80
90
dB
R
L
= 500k
, V
OUT
= 2V
P-P
90
101
dB
GBW
Gain-Bandwidth Product
R
L
= 20k
, C
L
= 2pF, Av = 11
2.3
MHz
PM
Phase Margin
R
L
= 20k
, C
L
= 2pF, Av = 11
50
BW
3 dB Bandwidth
R
L
= 1M
, C
L
= 2pF, Av = 1
4.2
MHz
SR
Slew Rate
R
L
= 1M
, C
L
= 2pF, Av = 1
3
V/
s
Positive Slew Rate 1.5V/
s
I
SC
Short-Circuit Output Current
Source
4.5
6.3
mA
Sink
4.5
6.2
mA
I
S
Supply Current (per op amp)
No Load
28
45
A
Channel-to-Channel Crosstalk
Note 5
120
dB
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
6
0.1
6
mV
5
5
Differential Offset Voltage
0.5
mV
Input Offset Voltage Temp Coefficient
6
V/
C
I
B
Input Bias Current
10
pA
I
OS
Input Offset Current
5
pA
V
CM
Input Voltage Range (from V)
CMRR > 60dB
3.5
4.1
V
CMRR
Common-Mode Rejection Ratio
0 < V
CM
< 3.5V,
60
87
dB
PSRR
Power Supply Rejection Ratio
Supply voltage change from 3V to 5V
60
92
dB
A
VOL
Large-Signal Voltage Gain
R
L
= 5k
, V
OUT
= 4.8V
P-P
65
73
dB
R
L
= 100k
, V
OUT
= 4.8V
P-P
80
86
dB
R
L
= 500k
, V
OUT
= 4.8V
P-P
89
96
dB
V
OUT
Maximum Output Voltage Swing
R
L
= 5k
V+50mV V+37mV
V
R
L
= 500k
V+3mV
V+1.3mV
V
V
OUT
Minimum Output Voltage Swing
R
L
= 5k
V+24mV V+ 40mV
mV
R
L
= 500k
V+0.7mV V+ 3mV
mV
GBW
Gain-Bandwidth Product
R
L
= 20k
, C
L
= 2pF, Av = 11
3
MHz
PM
Phase Margin
45
BW
3 dB Bandwidth
R
L
= 1M
, C
L
= 2pF, Av = 1
5
MHz
SR
Slew Rate
R
L
= 1M
, C
L
= 2pF, Av = 1
4
V/
s
Positive Slew Rate 1.8V/
s
I
SC
Short-Circuit Output Current
Source
17
23
mA
Sink
18
27
mA
I
S
Supply Current (per op amp)
No Load
31
47
A
Channel-to-Channel Crosstalk
Note 5
120
dB
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 sensitive
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.
DC signal referenced to input. Refer to Typical Characteristics graphs for AC performance.
September 2004
5
MIC862
MIC862
Micrel
0
4
8
12
16
20
24
28
32
36
40
44
0.9
1.06
1.22
1.38
1.54
1.7
1.86
2.02
2.18
2.34
2.5
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (
V)
Short Circuit Current
vs. Supply Voltage
Sinking
85
C
25
C
-40
C
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
0
-6
-12
-18
-24
-30
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
25
C
-40
C
85
C
Sourcing
V
=
2.5V
0
0.135
0.27
0.405
0.54
0.675
0.81
0.945
1.08
1.215
1.35
1.485
0
1
2
3
4
5
6
7
8
9 10
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
Sourcing
V
=
1.35V
25
C
85
C
-40
C
0
3
6
9
12
15
18
21
24
27
30
33
0.9
1.06
1.22
1.38
1.54
1.7
1.86
2.02
2.18
2.34
2.5
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (
V)
Short Circuit Current
vs. Supply Voltage
-40
C
25
C
Sourcing
85
C
-1.350
-1.215
-1.080
-0.945
-0.810
-0.675
-0.540
-0.405
-0.270
-0.135
0
0.135
0
1
2
3
4
5
6
7
8
9 10
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
Sinking
V
=
1.35V
85
C
25
C
-40
C
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
-0.75
-0.50
-0.25
0
0.25
0
8
16
24
32
40
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
Sinking
V
=
2.5V
25
C
-40
C
85
C
Typical Characteristics
0
5
10
15
20
25
30
35
40
45
50
55
0.90
1.06
1.22
1.38
1.54
1.70
1.86
2.02
2.18
2.34
2.50
SUPPLY CURRENT/CH (
A)
SUPPLY VOLTAGE (
V)
Supply Current
vs. Supply Voltage
85
C
25
C
-40
C
20
22
24
26
28
30
32
34
36
38
-40 -20
0
20
40
60
80 100
SUPPLY CURRENT/CH (
A)
TEMPERATURE (
C)
Supply Current/Ch
vs. Temperature
V
=
2.5V
V
=
1.35V
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
-2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage
vs. Common-Mode Voltage
-40
C
85
C
25
C
V
=
2.5V
0
0.5
1
1.5
2
2.5
-1.5
-1
-0.5
0
0.5
1
OFFSET VOLTAGE (mV)
COMMON-MODE VOLTAGE (V)
Offset Voltage
vs. Common-Mode Voltage
-40
C
85
C
25
C
V
=
1.35V
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
V
=
1.35V
V
=
2.5V
Sourcing
0
5
10
15
20
25
30
35
-40 -20
0
20
40
60
80 100
SHORT-CIRCUIT CURRENT (mA)
TEMPERATURE (
C)
Short Circuit Current
vs. Temperature
V
=
1.35V
V
=
2.5V
Sinking
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