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MIC7122
Micrel
MIC7122
Rail-to-Rail Dual Op Amp
General Description
The MIC7122 is a dual high-performance CMOS operational
amplifier featuring rail-to-rail inputs and outputs.
The input common-mode range extends beyond the rails by
300mV, and the output voltage swings to within 150µV of
both rails when driving a 100kΩ load.
The amplifiers operate from 2.2V to 15V and are fully
specified at 2.2V, 5V, and 15V. Gain bandwidth and slew
rate are 750kHz and 0.7V/µs, respectively at 2.2V supply.
The MIC7122 is available in the MM8™ 8-lead MSOP
package.
Features
•
•
•
•
•
•
Small footprint MSOP-8 package
350µA supply current per op amp at 2.2V supply
Guaranteed 2.2V, 5V, and 15V performance
750kHz gain-bandwidth product at 2.2V supply
0.01% total harmonic distortion at 1kHz (15V, 2kΩ)
Drives 200pF at 5V and greater supply voltages
Applications
• Battery-powered instrumentation
• PCMCIA, USB peripherals
• Portable computers and PDAs
Ordering Information
Part Number
Standard
MIC7122BMM
Pb-free
MIC7122YMM
Temperature Range
–40°C to +85°C
Package
MSOP-8
Pin Configuration
OUT A 1
IN A– 2
IN A+ 3
V– 4
8
7
6
5
V+
OUT B
INB–
INB+
1
2
A
3
B
4
8
7
6
5
MSOP-8 (MM)
Pin Description
Pin Number
1/7
2/6
3/5
4
8
MM8 is a trademark of Micrel, Inc.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Pin Name
OUTA / OUTB
INA– / INB–
INA+ / INB+
V–
V+
Pin Function
Amplifier Outputs
Inverting Inputs
Noninverting Inputs
Negative Supply: Negative supply for split supply application or ground for
single supply applications.
Positive Supply
June 2005
1
MIC7122
MIC7122
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
V+
– V
V–
) ........................................ 16.5V
Differential Input Voltage (V
IN+
– V
IN–
) .......................
±10V
I/O Pin Voltage (V
IN
, V
OUT
),
Note 3
............................................. V
V+
+ 0.3V to V
V–
– 0.3V
Junction Temperature (T
J
) ...................................... +150°C
Storage Temperature ............................... –65°C to +150°C
Lead Temperature (soldering, 10 sec.) ..................... 260°C
ESD,
Note 6
.............................................................. 1000V
Operating Ratings
(Note 2)
Supply Voltage (V
V+
– V
V–
) .............................. 2.2V to 15V
Junction Temperature (T
J
) ......................... –40°C to +85°C
Max. Power Dissipation ............................................
Note 4
Package Thermal Resistance,
Note 5
MSOP-8 (θ
JA
) .................................................... 200°C/W
DC Electrical Characteristics (2.2V)
V
V+
= +2.2V, V
V–
= 0V, V
CM
= V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
V
OS
TCV
OS
I
B
I
OS
R
IN
CMRR
±PSRR
C
IN
V
O
Parameter
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
Input Offset Current
Input Resistance
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Common-Mode Input Capacitance
Output Swing
output high, R
L
= 100k,
specified as V
V+
– V
OUT
output low, R
L
= 100k
output high, R
L
= 2k
specified as V
V+
– V
OUT
output low, R
L
= 2k
output high, R
L
= 600Ω
specified as V
V+
– V
OUT
output low, R
L
= 600Ω
I
SC
I
S
Output Short Circuit Current
Supply Current
sinking or sourcing,
Note 8
both amplifiers
20
-0.3V
≤
V
CM
≤
2.5V,
Note 9
V
V+
=
V
V–
= 1.1V to 2.5V, V
OUT
= V
CM
= 0
45
60
Condition
Min
Typ
0.5
3.0
1.0
64
0.5
32
>1
65
85
3
0.15
0.15
8
8
26
26
50
0.7
1.6
1
1
1
1
33
50
33
50
110
165
110
165
10
500
5
250
Max
9
Units
mV
µV/°C
pA
pA
pA
pA
TΩ
dB
dB
pF
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
AC Electrical Characteristics (2.2V)
V
V+
= 2.2V, V
V–
= 0V, V
CM
= V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
SR
GBW
φ
m
G
m
Parameter
Slew Rate
Gain-Bandwidth Product
Phase Margin
C
L
= 0pF
C
L
= 200pF
Gain Margin
Interamplifier Isolation
Note 12
Condition
Min
Typ
0.7
750
80
40
10
90
Max
Units
V/µs
kHz
°
°
dB
dB
MIC7122
2
June 2005
MIC7122
Micrel
DC Electrical Characteristics (5V)
V
V+
= +5.0V, V
V–
= 0V, V
CM
= 1.5V, V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
V
OS
TCV
OS
I
B
I
OS
R
IN
CMRR
±PSRR
C
IN
V
OUT
Parameter
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
Input Offset Current
Input Resistance
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Common-Mode Input Capacitance
Output Swing
output high, R
L
= 100k
specified as V
V+
– V
OUT
output low, R
L
= 100k
output high, R
L
= 2k
specified as V
V+
– V
OUT
output low, R
L
= 2k
output high, R
L
= 600Ω
specified as V
V+
– V
OUT
output low, R
L
= 600Ω
I
SC
I
S
Output Short Circuit Current
Supply Current
sinking or sourcing,
Note 8
both amplifiers
40
-0.3V
≤
V
CM
≤
5.3V,
Note 9
V
V+
=
V
V–
= 2.5V to 7.5V, V
OUT
= V
CM
= 0
55
55
Condition
Min
Typ
0.5
3.0
1.0
64
0.5
32
>1
75
100
3
0.3
0.3
13
13
40
40
140
0.8
1.8
1.0
1.5
1.0
1.5
50
75
50
75
165
250
165
250
10
500
5
250
Max
9
Units
mV
µV/°C
pA
pA
pA
pA
TΩ
dB
dB
pF
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
AC Electrical Characteristics (5V)
V
V+
= 5V, V
V–
= 0V, V
CM
= 1.5V, V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
THD
SR
GBW
φ
m
G
m
Parameter
Total Harmonic Distortion
Slew Rate
Gain-Bandwidth Product
Phase Margin
C
L
= 0pF
C
L
= 200pF
Gain Margin
Interamplifier Isolation
Note 12
Condition
f = 1kHz, A
V
= –2,
R
L
= 2kΩ, V
OUT
= 4.0 V
PP
Min
Typ
0.05
0.6
465
85
40
10
90
Max
Units
%
V/µs
kHz
°
°
dB
dB
June 2005
3
MIC7122
MIC7122
Micrel
DC Electrical Characteristics (15V)
V
V+
= +15V, V
V–
= 0V, V
CM
= 1.5V, V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
V
OS
TCV
OS
I
B
I
OS
R
IN
CMRR
±PSRR
A
V
Parameter
Input Offset Voltage
Input Offset Voltage Average Drift
Input Bias Current
Input Offset Current
Input Resistance
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
-0.3V
≤
V
CM
≤
15.3V,
Note 9
V
V+
=
V
V–
= 2.5V to 7.5V, V
OUT
= V
CM
= 0
sourcing or sinking,
R
L
= 2k,
Note 10
sourcing or sinking,
R
L
= 600Ω,
Note 10
C
IN
V
OUT
Common-Mode Input Capacitance
Output Swing
output high, R
L
= 100k
specified as V
V+
– V
OUT
output low, R
L
= 100k
output high, R
L
= 2k
specified as V
V+
– V
OUT
output low, R
L
= 2k
output high, R
L
= 600Ω
specified as V
V+
– V
OUT
output low, R
L
= 600Ω
I
SC
I
S
Output Short Circuit Current
Supply Current
sinking or sourcing,
Notes 8
both amplifiers
50
60
55
Condition
Min
Typ
0.5
3.0
1.0
64
0.5
32
>1
85
100
340
300
3
0.8
0.8
40
40
130
130
250
0.9
2.0
2
3
2
3
80
120
80
120
270
400
270
400
10
500
5
250
Max
9
Units
mV
µV/°C
pA
pA
pA
pA
TΩ
dB
dB
V/mV
V/mV
pF
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mA
mA
AC Electrical Characteristics (15V)
V
V+
= 15V, V
V–
= 0V, V
CM
= 1.5V, V
OUT
= V
V+
/2; R
L
= 1MΩ; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+85°C;
Note 7;
unless noted
Symbol
THD
SR
GBW
φ
m
G
m
e
n
i
n
Parameter
Total Harmonic Distortion
Slew Rate
Gain-Bandwidth Product
Phase Margin
C
L
= 0pF
C
L
= 500pF
Gain Margin
Input-Referred Voltage Noise
Input-Referred Current Noise
Interamplifier Isolation
f = 1kHz, V
CM
= 1V
f = 1kHz
Note 12
Condition
f = 1kHz, A
V
= –2,
R
L
= 2k, V
OUT
= 8.5 V
PP
V+ = 15V,
Note 11
Min
Typ
0.01
0.5
420
85
40
10
37
1.5
90
Max
Units
%
V/µs
kHz
°
°
dB
nV/ Hz
fA/ Hz
dB
MIC7122
4
June 2005
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