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MIC910
Micrel
MIC910
135MHz Low-Power SOT-23-5 Op Amp
General Description
The MIC910 is a high-speed, unity-gain stable operational amplifier. It provides a gain-bandwidth product of 135MHz with a very low, 2.4mA supply current, and features the tiny SOT-23-5 package. Supply voltage range is from 2.5V to 9V, allowing the MIC910 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC910 is stable driving any capacitative 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 MIC910 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables.
Features
* * * * * 135MHz gain bandwidth product 2.4mA supply current SOT-23-5 package 270V/s slew rate drives any capacitive load
Applications
* * * * * Video Imaging Ultrasound Portable equipment Line drivers
Ordering Information
Part Number MIC910BM5 Junction Temp. Range -40C to +85C Package SOT-23-5
Pin Configuration
IN+
3
Functional Pinout
V+ OUT
2 1
IN+
V+ OUT
2 1
Part Identification
3
A21
4 5
4 5
IN-
V-
IN-
V-
SOT-23-5
SOT-23-5
Pin Description
Pin Number 1 2 3 4 5 Pin Name OUT V+ IN+ IN- V- Pin Function Output: Amplifier Output Positive Supply (Input) Noninverting Input Inverting Input Negative Supply (Input)
Micrel, Inc. * 1849 Fortune Drive * San Jose, CA 95131 * USA * tel + 1 (408) 944-0800 * fax + 1 (408) 944-0970 * http://www.micrel.com
June 2000
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MIC910
MIC910
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Absolute Maximum Ratings (Note 1)
Supply Voltage (VV+ - VV-) ........................................... 20V Differentail Input Voltage (VIN+ - VIN-) .......... 8V, Note 4 Input Common-Mode Range (VIN+, VIN-) .......... VV+ to VV- Lead Temperature (soldering, 5 sec.) ....................... 260C Storage Temperature (TS) ........................................ 150C ESD Rating, Note 3 ................................................... 1.5kV
Operating Ratings (Note 2)
Supply Voltage (VS) ....................................... 2.5V to 9V Junction Temperature (TJ) ......................... -40C to +85C Package Thermal Resistance ............................... 260C/W
Electrical Characteristics (5V)
VV+ = +5V, VV- = -5V, VCM = 0V, VOUT = 0V; RL = 10M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted. Symbol VOS VOS IB IOS VCM CMRR PSRR AVOL VOUT Parameter Input Offset Voltage Input Offset Voltage Temperature Coefficient Input Bias Current Input Offset Current Input Common-Mode Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain CMRR > 60dB -2.5V < VCM < +2.5V 5V < VS < 9V RL = 2k, VOUT = 2V RL = 200, VOUT = 2V Maximum Output Voltage Swing positive, RL = 2k negative, RL = 2k positive, RL = 200 negative, RL = 200 GBW BW SR IGND IGND Gain-Bandwidth Product -3dB Bandwidth Slew Rate Short-Circuit Output Current source sink Supply Current RL = 1k AV = 1, RL = 100 +3.0 +2.75 -3.25 70 60 74 70 60 60 +3.3 +3.0 90 81 71 71 3.5 -3.5 3.2 -2.8 125 192 230 72 25 2.4 3.5 4.1 -2.45 -2.2 -3.3 -3.0 Condition Min Typ 1 4 3.5 0.05 5.5 9 3 +3.25 Max 15 Units mV V/C A A A V dB dB dB dB dB dB V V V V V V V V MHz MHz V/s mA mA mA mA
Electrical Characteristics
VV+ = +9V, VV- = -9V, VCM = 0V, VOUT = 0V; RL = 10M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS VOS IB IOS Parameter Input Offset Voltage Input Offset Voltage Temperature Coefficient Input Bias Current Input Offset Current Condition Min Typ 1 4 3.5 0.05 5.5 9 3 Max 15 Units mV V/C A A A
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Symbol VCM CMRR AVOL VOUT Parameter Input Common-Mode Range Common-Mode Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Condition CMRR > 60dB -6.5V < VCM < 6.5V RL = 2k, VOUT = 6V positive, RL = 2k negative, RL = 2k GBW SR IGND IGND
Note 1. Note 2. Note 3. Note 4.
Micrel
Min -7.25 70 60 60 +7.2 +6.8 98 73 +7.4 -7.4 135 270 source sink Supply Current
Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to increase.
Typ
Max +7.25
Units V dB dB dB V V
-7.2 -6.8
V V MHz V/s mA mA
Gain-Bandwidth Product Slew Rate Short-Circuit Output Current
RL = 1k
90 32 2.5 3.7 4.3
mA mA
Test Circuits
VCC 10F
VCC
50
BNC
0.1F
R2 5k 10F
Input 0.1F 10k 10k 50
BNC
2k
4 2
BNC
BNC
Input
Output
R1 5k R7c 2k R7b 200 R7a 100 R6 5k
4
2
0.1F
1 BNC
MIC910
3 5
1
MIC910
3 5
Output
10k
0.1F
0.1F 50
Input 0.1F
R3 200k R4 250
R5 5k VEE
10F
All resistors 1%
All resistors: 1% metal film VEE
10F
R2 R2 + R 5 + R4 VOUT = VERROR 1 + + R1 R7
100pF VCC
PSRR vs. Frequency
10pF R1 20
CMRR vs. Frequency
10F
R2 4k
R3 27k S1 S2
4
2
0.1F
1 BNC
MIC910
3 5
To Dynamic Analyzer
R5 20
R4 27k
0.1F
10pF VEE
10F
Noise Measurement June 2000 3 MIC910
MIC910
Micrel
Electrical Characteristics
Supply Current vs. Supply Voltage
3.5
SUPPLY CURRENT (mA)
Supply Current vs. Temperature
4.0 OFFSET VOLTAGE (mV) 2.5
Offset Voltage vs. Temperature
VSUPPLY = 5V 2.0
SUPPLY CURRENT (mA)
+85C 3.0 +25C
3.5
VSUPPLY = 9V VSUPPLY = 5V
3.0
2.5
-40C
1.5
VSUPPLY = 9V
2.5
2.0 2
3456789 SUPPLY VOLTAGE (V)
10
2.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
1.0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
Bias Current vs. Temperature
5
Offset Voltage vs. Common-Mode Voltage
6 OFFSET VOLTGE (mV) OFFSET VOLTGE (mV) 5 4 +85C 3 -40C 2 1 +25C 0 -8 -6 -4 -2 0 2 4 6 8 COMMON-MODE VOLTAGE (V) VSUPPLY = 9V 4 3 2 1 5
Offset Voltage vs. Common-Mode Voltage
VSUPPLY = 5V
BIAS CURRENT (A)
4 VSUPPLY = 5V
+85C
3
-40C +25C
2
VSUPPLY = 9V
1 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
0 -5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V)
Short-Circuit Current vs. Temperature
95 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 90 85 80 75 70 65 60 55 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) VSUPPLY = 5V SOURCING CURRENT VSUPPLY = 9V -20
Short-Circuit Current vs. Temperature
100
VSUPPLY = 5V
Short-Circuit Current vs. Supply Voltage
OUTPUT CURRENT (mA)
-25
80
-40C +25C
-30 SINKING CURRENT -35 VSUPPLY = 9V -40 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
60 +85C 40 SOURCING CURRENT 20 2 3456789 SUPPLY VOLTAGE (V) 10
Short-Circuit Current vs. Supply Voltage
-15 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) -20 -25 -30 -35 SINKING CURRENT -40 2 +25C 10 -40C +85C 10 9 8 7 6 5 4 3 2 1 0 0
Output Voltage vs. Output Current
OUTPUT VOLTAGE (V) VSUPPLY = 9V 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -40
Output Voltage vs. Output Current
SINKING CURRENT
-40C +25C
+85C
+25C -40C SOURCING CURRENT +85C
VSUPPLY = 9V -30 -20 -10 OUTPUT CURRENT (mA) 0
3456789 SUPPLY VOLTAGE (V)
20 40 60 80 100 OUTPUT CURRENT (mA)
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Output Voltage vs. Output Current
4.5 4.0 OUTPUT VOLTAGE (V) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 SOURCING CURRENT 20 40 60 80 OUTPUT CURRENT (mA) +85C -40C +25C
OUTPUT VOLTAGE (V) 0.0
Output Voltage vs. Output Current
GAIN BANDWIDTH (MHz)
-0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -30 VSUPPLY = 5V +85C 0 +25C -40C SINKING CURRENT
Gain Bandwidth and Phase Margin vs. Load
150 125 100 75 50 25 0 0 VSUPPLY = 5V 46 44 42 40 38 36 34 200 400 600 800 1000 CAPACITIVE LOAD (pF)
VSUPPLY = 5V
-25 -20 -15 -10 -5 OUTPUT CURRENT (mA)
Gain Bandwidth and Phase Margin vs. Load
150 46
Gain Bandwidth and Phase Margin vs. Supply Voltage
150 54 52
Common-Mode Rejection Ratio
120 100
GAIN BANDWIDTH (MHz)
125 100 VSUPPLY = 9V 75 50 25 0 0
GAIN BANDWIDTH (MHz)
44
125 100 75 50 25 0 2 3456789 SUPPLY VOLTAGE (V)
PHASE MARGIN ()
40 38 36 34 200 400 600 800 1000 CAPACITIVE LOAD (pF)
48 46 44 42 10
CMRR (dB)
42
50
PHASE MARGIN ()
80 60 40 20 VSUPPLY = 9V
1x102
1x103
1x104
1x105
1x106
FREQUENCY (Hz)
Common-Mode Rejection Ratio
120 100
Positive Power Supply Rejection Ratio
100 80
+PSRR (dB) -PSRR (dB)
Negative Power Supply Rejection Ratio
100 80 60 40 VSUPPLY = 9V 20 0
CMRR (dB)
80 60 40 20 VSUPPLY = 5V
60 40 VSUPPLY = 9V 20
1x102
1x103
1x104
1x105
1x106
1x107
1x102
1x103
1x104
1x105
1x106
1x102
1x103
1x104
1x105
1x106
FREQUENCY (Hz)
1x107
0
FREQUENCY (Hz)
FREQUENCY (Hz)
Positive Power Supply Rejection Ratio
100 80
Negative Power Supply Rejection Ratio
100 80
-PSRR (dB)
+PSRR (dB)
60 40 VSUPPLY = 5V 20 0
60 40 VSUPPLY = 5V 20
1x102
1x103
1x104
1x105
1x106
1x107
1x102
1x103
1x104
1x105
1x106
FREQUENCY (Hz)
FREQUENCY (Hz)
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1x107
0
1x107
0
1x107
0
MIC910
PHASE MARGIN ()
MIC910
Micrel
Closed-Loop Frequency Response Test Circuit
VCC 10F
Closed-Loop Frequency Response
50 40 30 20 GAIN (dB) 10 0 -10 -20 -30 -40 -50 1 VCC = 2.5V 10 100 200 FREQUENCY (MHz) 1000pF 500pF 200pF 100pF 50pF 50 40 30 20
GAIN (dB)
Open-Loop Frequency Response
RL=100 225 180 135 90 No Load 45 0 -45 -90 VCC = 5V -135 -180
PHASE () PHASE ()
0p
0.1F
10 0 -10 -20 -30 -40 -50 1
FET probe MIC910 RF 50 10F VEE CL
-225 10 100 200 FREQUENCY (MHz)
Closed-Loop Frequency Response
50 40 30 20 GAIN (dB) 10 0 -10 -20 -30 -40 -50 1 VCC = 5V 10 100 200 FREQUENCY (MHz) 1000pF 500pF 200pF 100pF 50pF 50 40 30 20
GAIN (dB)
Open-Loop Frequency Response
RL=100 225 180 135 90 No Load 45 0 -45 -90 VCC = 9V -135 -180
0p
10 0 -10 -20 -30 -40 -50 1
-225 10 100 200 FREQUENCY (MHz)
Voltage Noise
120
Positive Slew Rate
250 200 150 100 50 0 0 VCC = 5V 250 200 150 100 50 0 0
Negative Slew Rate
VCC = 5V
nV Hz
100
SLEW RATE (V/s)
80 60 40 20
NOISE VOLTAGE
1x101
1x102
1x103
1x104
1x105
0
200 400 600 800 1000 LOAD CAPACITANCE (pF)
SLEW RATE (V/s)
200 400 600 800 1000 LOAD CAPACITANCE (pF)
FREQUENCY (Hz)
Current Noise
5
Positive Slew Rate
300 250 SLEW RATE (V/s) 200 150 100 50 VCC = 9V 300 250 SLEW RATE (V/s) 200 150 100 50 200 400 600 800 1000 LOAD CAPACITANCE (pF) 0 0
Negative Slew Rate
VCC = 9V
NOISE CURRENT pA Hz
4 3 2 1 0
1x101
1x102
1x103
1x104
1x105
0 0
200 400 600 800 1000 LOAD CAPACITANCE (pF)
FREQUENCY (Hz)
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Small-Signal Pulse Response
Small-Signal Pulse Response
INPUT
VCC = 9V AV = 1 CL = 1.7pF RL = 10M
INPUT
VCC = 5V AV = 1 CL = 1.7pF RL = 10M
OUTPUT
Small-Signal Pulse Response
OUTPUT
Small-Signal Pulse Response
INPUT
VCC = 9V AV = 1 CL = 100pF RL = 10M
INPUT
VCC = 5V AV = 1 CL = 100pF RL = 10M
OUTPUT
Small-Signal Pulse Response
OUTPUT
Small-Signal Pulse Response
INPUT
VCC = 9V AV = 1 CL = 1000pF RL = 10M
INPUT
VCC = 5V AV = 1 CL = 1000pF RL = 10M
OUTPUT
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OUTPUT
MIC910
MIC910
Micrel
Large-Signal Pulse Response
VCC = 9V AV = 1 CL = 1.7pF
OUTPUT
Large-Signal Pulse Response
VCC = 5V AV = 1 CL = 1.7pF
OUTPUT
V = 5.64V t = 21ns
V = 5.68V t = 24.5ns
Large-Signal Pulse Response
Large-Signal Pulse Response
VCC = 5V AV = 1 CL = 100pF
OUTPUT
V = 5.84V t = 22.5ns
OUTPUT
VCC = 9V AV = 1 CL = 100pF
V = 5.84V t = 26ns
Large-Signal Pulse Response
Large-Signal Pulse Response
VCC = 5V AV = 1 CL = 1000pF
OUTPUT
V = 5.88V t = 70ns
OUTPUT
VCC = 9V AV = 1 CL = 1000pF
V = 5.48V t = 95ns
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Power Supply Bypassing Regular supply bypassing techniques are recommended. A 10F capacitor in parallel with a 0.1F 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. Thermal Considerations The SOT-23-5 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 85C. The part can be operated up to the absolute maximum temperature rating of 125C, but between 85C and 125C performance will degrade, in particular CMRR will reduce. A MIC910 with no load, dissipates power equal to the quiescent supply current * supply voltage PD(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 + - VOUT IOUT
Applications Information
The MIC910 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable and capable of driving high capacitance loads. Driving High Capacitance The MIC910 is stable when driving any 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. Note: increasing load capacitance does reduce the speed of the device (see "Typical Characteristics: Gain Bandwidth and Phase Margin vs. Load"). In applications where the load capacitance reduces the speed of the op amp to an unacceptable level, the effect of the load capacitance can be reduced by adding a small resistor (<100) in series with the output. Feedback Resistor Selection Conventional op amp gain configurations and resistor selection apply, the MIC910 is NOT a current feedback device. Resistor values in the range of 1k to 10k are recommended. Layout Considerations All high speed devices require careful PCB layout. The high stability and high PSRR of the MIC910 make this op amp easier to use than most, but 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. It is important to ensure adequate supply bypassing capacitors are located close to the device.
(
)
(
)
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 260C/W. Max . Allowable Power Dissipation = TJ (max) - TA(max) 260W
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MIC910
MIC910
Micrel
MIC910
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MIC910
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Package Information
1.90 (0.075) REF 0.95 (0.037) REF
1.75 (0.069) 1.50 (0.059)
3.00 (0.118) 2.60 (0.102)
DIMENSIONS: MM (INCH) 3.02 (0.119) 2.80 (0.110) 1.30 (0.051) 0.90 (0.035) 10 0 0.15 (0.006) 0.00 (0.000) 0.20 (0.008) 0.09 (0.004)
0.50 (0.020) 0.35 (0.014)
0.60 (0.024) 0.10 (0.004)
SOT-23-5 (M5)
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MIC910
MIC910
Micrel
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. (c) 2000 Micrel Incorporated
MIC910
12
June 2000

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