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
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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
MIC7122
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
I/O Pin Voltage is any external voltage to which an input or output is referenced.
Micrel
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J(max)
; the junction-to-ambient thermal
resistance,
θ
JA
; and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
P
D
= (T
J(max)
– T
A
)
÷ θ
JA
. Exceeding the maximum allowable power dissipation will result in excessive die temperature.
Thermal resistance,
θ
JA
, applies to a part soldered on a printed-circuit board.
Devices are ESD protected; however, handling precautions are recommended. Human body model, 1.5kΩ in series with 100pF.
All limits guaranteed by testing or statistical analysis.
Continuous short circuit may exceed absolute maximum T
J
under some conditions.
CMRR is determined as follows: The maximum
∆V
OS
over the V
CM
range is divided by the magnitude of the V
CM
range. The measurement
points are: V
CM
= V
V–
– 0.3V, (V
V+
– V
V–
)/2, and V
V+
+ 0.3V.
Note 5.
Note 6.
Note 7.
Note 8.
Note 9.
Note 10.
R
L
connected to 7.5V. Sourcing: 7.5V
≤
V
OUT
≤
12.5V. Sinking: 2.5V
≤
V
OUT
≤
7.5V.
Note 11.
Device connected as a voltage follower with a 10V step input. The value is the positive or negative slew rate, whichever is slower.
Note 12.
Referenced to input.
June 2005
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MIC7122
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