MIC912YM5 [MICROCHIP]
OP-AMP, 15000uV OFFSET-MAX, 170MHz BAND WIDTH, PDSO5;
| 型号： | MIC912YM5 |
| 厂家： | 
MICROCHIP |
| 描述： | OP-AMP, 15000uV OFFSET-MAX, 170MHz BAND WIDTH, PDSO5 放大器 光电二极管 |
| 文件： | 总12页 (文件大小：1240K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC912
200MHz Low-Power SOT23-5 Op Amp
General Description
Features
The MIC912 is a high-speed, operational amplifier with a
gain-bandwidth product of 200MHz. The part is unity-gain
stable provided its output is loaded with at least 200Ω. It
has a very low, 2.4mA supply current, and features the tiny
SOT23-5 package.
• 200MHz gain bandwidth product
• 2.4mA supply current
• SOT23-5 package
• 360V/µs slew rate
• Drives any capacitive load
• Unconditionally stable with gain of +2 or –1
• Conditionally stable with gain of +1
Supply voltage range is from ±2.5V to ±9V, allowing the
MIC912 to be used in low-voltage circuits or applications
requiring large dynamic range.
The MIC912 is stable driving any capacitive load and
achieves excellent PSRR, making it much easier to use
than most conventional high-speed devices. Low supply
voltage, low power consumption, and small packing make
the MIC912 ideal for portable equipment. The ability to
drive capacitive loads also makes it possible to drive long
coaxial cables.
Applications
• Video
• Imaging
• Ultrasound
• Portable equipment
• Line drivers
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Ordering Information
Part Number
MIC912BM5
MIC912YM5
Temperature Range
–40° to +85°C
Package
Lead Finish
Standard
Pb-Free
5-Pin SOT23
5-Pin SOT23
–40° to +85°C
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-100507
October 2007
Micrel, Inc.
MIC912
Pin Configuration
Functional Pinout
IN+ V+ OUT
IN+ V+ OUT
3
2
1
3
2
1
Part
Identification
A23
4
5
4
5
IN–
V–
IN–
V–
SOT23-5
SOT23-5
Pin Description
Pin Number
Pin Name
OUT
V+
Pin Function
1
2
3
4
5
Output: Amplifier Output
Positive Supply (Input)
Non-inverting Input
Inverting Input
IN+
IN–
V–
Negative Supply (Input)
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Micrel, Inc.
MIC912
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VV+ – VV–).............................................20V
Differential Input Voltage (|VIN+ – VIN–|)(3) .........................8V
Input Common-Mode Range (VIN+ – VIN–).............VV+ to VV–
Lead Temperature (soldering, 5 sec.)........................ 260°C
Storage Temperature (Ts) .......................................... 150°C
ESD Rating(4)...............................................................1.5kV
Supply Voltage (VS)......................................... ±2.5V to ±9V
Junction Temperature (TJ) ..........................–40°C to +85°C
Thermal Resistance ...............................................260°C/W
Electrical Characteristics (±5V)
VV+ = +5V, VV– = –5V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted.
Symbol
Parameter
Condition
Min
Typ
1
Max
15
Units
mV
VOS
Input Offset Voltage
Input Offset Voltage
4
µV/°C
Temperature Coefficient
IB
Input Bias Current
3.5
0.05
90
5.5
9
µA
µA
µA
V
IOS
Input Offset Current
3
VCM
Input Common-Mode Range
Common-Mode Rejection Ratio
CMRR > 60dB
–3.25
70
+3.25
CMRR
–2.5V < VCM < +2.5V
dB
dB
dB
dB
dB
dB
V
60
PSRR
AVOL
Power Supply Rejection Ratio
Large-Signal Voltage Gain
±5V < VS < ±9V
74
90
70
RL = 2k, VOUT = ±2V
60
71
71
RL = 200Ω, VOUT = ±1V
60
VOUT
Maximum Output Voltage Swing positive, RL = 2kΩ
+3.3
+3.0
3.5
V
negative, RL = 2kΩ
–3.5
3.2
–3.3
V
–3.0
V
positive, RL = 200Ω
+3.0
V
+2.75
V
negative, RL = 200Ω
–2.8
–2.45
V
–2.2
V
GBW
BW
Unity Gain-Bandwidth Product
–3dB Bandwidth
RL = 1kΩ
170
150
325
72
MHz
MHz
V/µs
mA
mA
mA
mA
AV = 1, RL = 100Ω
SR
Slew Rate
IGND
Short-Circuit Output Current
source
sink
25
Supply Current
2.4
3.5
4.1
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Micrel, Inc.
MIC912
Electrical Characteristics
VV+ = +9V, VV– = –9V, VCM = 0V, VOUT = 0V; RL = 10MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted.
Symbol
Parameter
Condition
Min
Typ
1
Max
15
Units
mV
VOS
Input Offset Voltage
Input Offset Voltage
4
µV/°C
Temperature Coefficient
IB
Input Bias Current
3.5
0.05
98
5.5
9
µA
µA
µA
V
IOS
Input Offset Current
3
VCM
Input Common-Mode Range
Common-Mode Rejection Ratio
CMRR > 60dB
–7.25
70
+7.25
CMRR
–6.5V < VCM < 6.5V
dB
dB
dB
V
60
AVOL
VOUT
Large-Signal Voltage Gain
RL = 2kΩ, VOUT = ±6V
60
73
Maximum Output Voltage Swing positive, RL = 2kΩ
+7.2
+6.8
+7.4
V
negative, RL = 2kΩ
–7.4
–7.2
V
–6.8
V
GBW
SR
Unity Gain-Bandwidth Product
Slew Rate
RL = 1kΩ
200
360
90
MHz
V/µs
mA
mA
mA
mA
IGND
Short-Circuit Output Current
source
sink
32
Supply Current
2.5
3.7
4.3
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to
change).
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
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MIC912
Test Circuits
VCC
10µF
VCC
0.1µF
50
R2
5k
BNC
Input
10µF
0.1µF
2k
BNC
10k
10k
R1 5k
R7c 2k
4
3
4
3
2 0.1µF
2
Input
BNC
BNC
1
1
MIC912
Output
MIC912
Output
10k
5
5 0.1µF
R6
5k
0.1µF
BNC
R3
200k
R5
5k
Input
10µF
VEE
0.1µF
10µF
All resistors 1%
R4
All resistors:
1% metal film
R2 R2 +R5 +R4
⎛
⎜
⎝
⎞
⎟
⎠
V
=V
1+
+
OUT
ERROR
VEE
R1
R7
PSRR vs. Frequency
CMRR vs. Frequency
100pF
R2 4k
VCC
10µF
10pF
R1
R5
R3 27k
4
2 0.1µF
BNC
To
Dynamic
Analyzer
S1
S2
1
MIC912
3
5 0.1µF
R4 27k
10pF
10µF
VEE
Noise Measurement
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Micrel, Inc.
MIC912
Typical Characteristics
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MIC912
Typical Characteristics (continued)
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Micrel, Inc.
MIC912
Typical Characteristics (continued)
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Micrel, Inc.
MIC912
Functional Characteristics
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MIC912
Functional Characteristics (continued)
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Micrel, Inc.
MIC912
Layout Considerations
Application Information
All high speed devices require careful PCB layout. The
following guidelines should be observed: Capacitance,
particularly on the two inputs pins will degrade
performance; avoid large copper traces to the inputs.
Keep the output signal away from the inputs and use a
ground plane.
The MIC912 is
a
high-speed, voltage-feedback
operational amplifier featuring very low supply current
and excellent stability. This device is unity gain stable
with RL ≤ 200Ω and capable of driving high capacitance
loads.
Stability Considerations
It is important to ensure adequate supply bypassing
capacitors are located close to the device.
The MIC912 is unity gain stable and it is capable of
driving unlimited capacitance loads, but some design
considerations are required to ensure stability. The
output needs to be loaded with 200Ω resistance or
less and/or have sufficient load capacitance to
achieve stability (refer to the “Load Capacitance vs.
Phase Margin” graph).
Power Supply Bypassing
Regular supply bypassing techniques are recom-
mended. A 10µF capacitor in parallel with a 0.1µF
capacitor on both the positive and negative supplies are
ideal. For best performance 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 resistance).
Surface-mount ceramic capacitors are ideal.
For applications requiring a little less speed, Micrel offers
the MIC910, a more heavily compensated version of the
MIC912 which provides extremely stable operation for all
load resistance and capacitance.
Thermal Considerations
Driving High Capacitance
The SOT23-5 package, like all small packages, has a
high thermal resistance. It is important to ensure the IC
does not exceed the maximum operating junction (die)
temperature of 85°C. The part can be operated up to the
absolute maximum temperature rating of 125°C, but
between 85°C and 125°C performance will degrade, in
particular CMRR will reduce.
The MIC912 is stable when driving high capacitance
(see “Typical Characteristics: Gain Bandwidth and
Phase Margin vs. Load Capacitance”) making it ideal for
driving long coaxial cables or other high-capacitance
loads.
Phase margin remains constant as load capacitance is
increased. Most high-speed op amps are only able to
drive limited capacitance.
A MIC912 with no load, dissipates power equal to the
quiescent supply current * supply voltage.
Note: increasing load capacitance does reduce
the speed of the device (see “Typical Character-
istics: Gain Bandwidth and Phase Margin vs.
Load”). In applications where the load capaci-
tance reduces the speed of the op amp to an
unacceptable level, the effect of the load capaci-
tance can be reduced by adding a small resistor
(<100Ω) in series with the output.
P
D(no load) = (VV+ – VV–)IS
When a load is added, the additional power is dissipated
in the output stage of the op amp. The power dissipated
in the device is a function of supply voltage, output
voltage and output current.
PD(output stage) = (VV+ – VV–)IOUT
Total Power Dissipation = PD(no load) + PD(output stage)
Ensure the total power dissipated in the device is no
greater than the thermal capacity of the package. The
SOT23-5 package has a thermal resistance of 260°C/W.
Feedback Resistor Selection
Conventional op amp gain configurations and resistor
selection apply, the MIC912 is NOT a current feedback
device. Resistor values in the range of 1k to 10k are
recommended.
TJ(max) − TA(max)
Max. Allowable Power Dissipation =
260W
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Micrel, Inc.
MIC912
Package Information
5-Pin SOT23 (M5)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2001 Micrel, Incorporated.
M9999-100507
October 2007
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