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MIC923
Micrel
MIC923
410MHz Low-Power SC70 Op Amp Final Information
General Description
The MIC923 is a high-speed operational amplifier with a gainbandwidth product of 410MHz. The part is unity gain stable. It has a very low 2.5mA supply current, and features the TeenyTMSC70 package. Supply voltage range is from 2.5V to 9V, allowing the MIC923 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC923 requires a minimum gain of +2 or -1 but is stable driving any capacitive load. It has excellent PSRR and CMRR, making it much easier to use than most conventional high-speed devices. Low supply voltage, low power consumption, and small packaging make the MIC923 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables.
Features
* * * * * * * * * * * 410MHz gain bandwidth product 2.5mA supply current TeenyTM SC70 packaging 2200V/s slew rate Drives any capacitive load Stable with gain 2 or -1 Video Imaging Ultrasound Portable equipment Line drivers
Applications
Ordering Information
Part Number MIC923BC5 Junction Temp. Range -40C to +85C Package SC-70
Pin Configuration
IN-
3
Functional Pinout
V-
2
IN+
1
IN-
V-
2
IN+
1
Part Identification
3
A40
4 5
4
5
OUT
V+
OUT
V+
SC-70
SC-70
Pin Description
Pin Number 1 2 3 4 5 Pin Name IN+ V- IN- OUT V+ Pin Function Noninverting Input Negative Supply (Input) Inverting Input Output: Amplifier Output Positive 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
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MIC923
MIC923
Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (VV+ - VV-) ........................................... 20V Differential Input Voltage (VIN+ - VIN-) .......... 4V, Note 3 Input Common-Mode Range (VIN+, VIN-) .......... VV+ to VV- Lead Temperature (soldering, 5 sec.) ....................... 260C Storage Temperature (TS) ........................................ 150C ESD Rating, Note 4 ................................................... 1.5kV
Operating Ratings (Note 2)
Supply Voltage (VS) ....................................... 2.5V to 9V Junction Temperature (TJ) ......................... -40C to +85C Package Thermal Resistance SC70-5 (JA) ..................................................... 450C/W
Electrical Characteristics (5V)
V+ = +5V, V- = -5V, VCM = 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 VOS Temperature Coefficient Input Bias Current Input Offset Current Input Common-Mode Range Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain -2.5V < VCM < +2.5V 3.5V < VS < 9V RL = 2k, VOUT = 2V RL = 100, VOUT = 1V Maximum Output Voltage Swing positive, RL = 2k negative, RL = 2k positive, RL = 100 negative, RL = 100, Note 5 GBW SR ISC IS Gain-Bandwidth Product Slew Rate Short-Circuit Output Current CL = 1.7pF C=1.7pF, Av =2, RL = 1M, RF = 2k negative SR = 720V/s source sink Supply Current Input Voltage Noise Input Current Noise No Load f = 10kHz f = 10kHz 65 40 +2.7 +3 -2 -3.25 75 68 65 80 87 74 77 3.6 -3.6 3.0 -2.6 320 970 78 47 2.5 9 1.1 3 -2.3 -3 Condition Min -5 Typ 0.8 15 1.7 0.3 4.5 2 +3.25 Max 5 Units mV V/C A A V dB dB dB dB V V V V MHz V/s mA mA mA nV/Hz pA/Hz
Electrical Characteristics
V+ = +9V, V- = -9V, VCM = 0V, RL = 10M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS VOS IB IOS VCM CMRR PSRR 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 -6.5V < VCM < +6.5V 3.5V < VS < 9V -7.25 58 68 83 87 Condition Min -5 Typ 0.4 15 1.7 0.3 4.5 2 +7.25 Max 5 Units mV V/C A A V dB dB
MIC923
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MIC923
Symbol AVOL VOUT GBW SR ISC IS Parameter Large-Signal Voltage Gain Condition RL = 2k, VOUT = 3V RL = 100, VOUT = 1V Maximum Output Voltage Swing positive, RL = 2k negative, RL = 2k Gain-Bandwidth Product Slew Rate Short-Circuit Output Current CL = 1.7pF, RL = 100 C=1.7pF, Av =2, RL = 1M, RF = 2k positive SR = 2100V/s source sink Supply Current Input Voltage Noise Input Current Noise
Note 1. Note 2. Note 3. Note 4. Note 5.
Micrel
Min 65 Typ 76 86 7 7.5 -7.5 410 2200 70 40 84 50 2.5 9 1.1 3 -7 Max Units dB dB V V MHz V/s mA mA mA nV/Hz pA/Hz
No Load f = 10kHz f = 10kHz
Exceeding the absolute maximum rating may damage the device. The device is not guaranteed to function outside its operating rating. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is likely to change). Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Output swing limited by the maximum output sink capability, refer to the short-circuit current vs. temperature graph in "Typical Characteristics."
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MIC923
MIC923
Micrel
Test Circuits
V+ 10F
V+
50
BNC
0.1F
R2 5k 10F
Input 0.1F 10k 10k 50
BNC
2k
3 5
BNC
BNC
Input
Output
R1 5k R7c 2k R7b 200 R7a 100 R6
3
5
0.1F
4 BNC
MIC923
1 2
4
MIC923
1 2
Output
10k
0.1F
0.1F 50
5k All resistors 1%
Input 0.1F
R3 200k R4 250
R5 5k V-
10F
All resistors: 1% metal film V-
10F
R2 R2 + R 5 + R4 VOUT = VERROR 1 + + R1 R7
PSRR vs. Frequency
CMRR vs. Frequency
100pF
V+
V+ 10F
10pF R1 20
R2 4k
10F
3
0.1F
5
R3 27k S1 S2
3
5
0.1F
4 BNC
MIC923
1 2
To Dynamic Analyzer
MIC923 VIN 50
1 2
4
300
VOUT FET Probe
0.1F 1k
R5 20
R4 27k
0.1F
CL
10pF V-
10F
10F
V-
Noise Measurement
Closed Loop Frequency Response Measurement
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MIC923
Micrel
Typical Characteristics
Supply Current vs. Supply Voltage
2.65 SUPPLY CURRENT (mA) 2.6 2.55 2.5 2.45 85C 2.4 2.35 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 SUPPLY VOLTAGE (V) 25C -40C
SUPPLY CURRENT (mA)
Supply Current vs. Temperature
2.7 2.65 2.6 2.55 2.5 2.45 2.4 2.35 2.3 -40 -20 0 20 40 60 80 100 9V
SLEW RATE (V/s)
Positive Slew Rate vs. Load Capacitance
2.5 2.5V 2 5V 1.5 1 0.5 0 -40 -20 9V
5V 2.5V
0
20
40
60
80 100
TEMPERATURE (C)
LOAD CAPACITANCE (pF)
Supply Current vs. Supply Voltage
4.4 4.0 3.6 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0.0
Offset Voltage vs. Common-Mode Voltage
8 7 6 5 4 3 2 1 0 -1 -2 -3
OFFSET VOLTAGE (mV)
Offset Voltage vs. Temperature
1.6
OFFSET VOLTAGE (mV)
SUPPLY CURRENT (mA)
VCC = 5V
1.4 1.2 1 0.8 0.6 0.4 0.2 9V 5V 2.5V
-40C 25C 85C
-40C 25C
85C
-5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
0 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Offset Voltage vs. Common-Mode Voltage
8 V = 9V 7 6 5 4 -40C 25C 3 2 1 0 85C -1 -2 -3 -5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V) 3.0 BIAS CURRENT (A) 2.5 2.0 OFFSET VOLTAGE (mV)
Bias Current vs. Temperature
2.65 SUPPLY CURRENT (mA) 2.60 2.55 2.50 2.45
Supply Current vs. Supply Voltage
-40C +25C
2.5V 1.5 1.0 0.5 9V 5V
+85C 2.40 2.35 2.30 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 SUPPLY VOLTAGE (V)
0 -40 -20 0 20 40 60 80 100 TEMPERATURE (mA)
Supply Current vs. Supply Voltage
2.55 SUPPLY CURRENT (mA) OUTPUT VOLTAGE (V) 2.50 2.45 2.40 2.35 2.30 +85C -40C
Output Voltage vs. Output Current
5.5 Sourcing 5.0 V = 5V 4.5 4.0 -40C 3.5 3.0 2.5 +25C 2.0 1.5 1.0 +85C 0.5 0 0 9 18 27 36 45 54 63 72 81 90 OUTPUT CURRENT (mA)
Output Voltage vs. Output Current
9.9 9.0 8.1 7.2 6.3 5.4 4.5 3.6 2.7 1.8 0.9 0
OUTPUT VOLTAGE (V)
Sourcing V = 9V -40C 25C
+25C
2.25 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 SUPPLY VOLTAGE (V)
85C 0 9 18 27 36 45 54 63 72 81 90 OUTPUT CURRENT (mA)
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Micrel
Output Voltage vs. Output Current
0.5 0 -0.5 -1.0 -1.5 -2.0 -40C -2.5 25C -3.0 -3.5 -4.0 -4.5 -5.0 -50 -40 -30 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Sinking V = 5V
Output Voltage vs. Output Current
0.9 25C 0 -0.9 -1.8 -2.7 85C -3.6 -4.5 -5.4 -40C -6.3 -7.2 -8.1 -9.0 -60 -48 -36 Sinking V = 9V 99 90 81 72 63 54 45 36 27 18 9 0 SHORT CIRCUIT CURRENT (mA)
Short Circuit Current vs. Supply Voltage
-40C 85C 25C
85C
Sourcing V = 9V 2 3.4 4.8 6.2 7.6 9 SUPPLY VOLTAGE (V)
-20
-10
0
-24
-12
0
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
Short Circuit Current vs. Supply Voltage
6 0 -6 -12 -18 -24 -30 -36 -42 -48 -54 -60 2.0 SHORT CIRCUIT CURENT (mA) Sinking
35
Closed Loop Frequency
30 Phase Margin 25 Av = 4 V = 2.5V 45 0 -45 -90 -135 -180 -225 -270 -315 -360 90 35
Closed Loop Frequency Response
30 Phase Margin 25 90 Av = 4 V = 5V 45 0 -45 -90 -135 -180 -225 -270 -315 -360
PHASE MARGIN ()
GAIN (dB)
10 Gain Bandwidth 5 0 -5 -10 -15 1M
25C
GAIN (dB)
20 15
20 15 Gain Bandwidth 10 5 0 -5 -10 -15 1M
85C
-40C 3.4 4.8 6.2 7.6 SUPPLY VOLTAGE (V)
9.0
100M 10M FREQUENCY (Hz)
10M 100M FREQUENCY (Hz)
Closed Loop Frequency Response
35 30 25 20
GAIN (dB)
Closed Loop Frequency Response
50 OPEN-LOOP GAIN (dB) 50 40 30 20 10 0 -10 -20 -30 -40 -50 1M 40 30 GAIN (dB) 20 10 0 -10 -20 -30 -40 -50 1M 5V 2.5V 9V
Open-Loop Gain vs. Frequency
V = 9V
220pF 100pF 1.7pF
Phase Margin
15 Gain Bandwidth 10 5 0 -5 -10 -15 FREQUENCY (Hz)
-90 -135 -180 -225 -270 -315 -360
PHASE MARGIN ()
90 Av = 4 V = 9V 45 0 -45
1000pF 680pF 470pF
10M 100M FREQUENCY (Hz)
100M 10M FREQUENCY (Hz)
Open-Loop Gain vs. Frequency
50 OPEN-LOOP GAIN (dB) 40 30 20 10 0 -10 -20 -30 -40 -50 6 1x10 1M
1000pF 680pF 470pF
Open-Loop Frequency Response
70
Open-Loop Frequency Response
GAIN BANDWIDTH (dB)
315 270 225 180 70 60 50 Gain 40 30 20 Phase 10 0 -10 -20 -30 2M V = 5V 315 270 225
V = 5V
220pF 100pF 1.7pF
GAIN BANDWIDTH (dB)
PHASE ()
20 10 Phase 0 -10 -20 -30 6 2x10 100
135 90
100
No Load 100 100 No Load
No Load
45 0
90 45 0 -45 -90 -135
10x106 10M
100x10 100M6
500x106
FREQUENCY (Hz)
-45 -90 -135 6 6 10x1010k 100k 100x10 1k 1M 500x106 10M FREQUENCY (Hz)
10M 100M FREQUENCY (Hz)
MIC923
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PHASE ()
60 50 Gain 100 40 No Load 30
V = 9V
180 135
PHASE MARGIN ()
MIC923
Micrel
Functional Characteristics
Small Signal Response
Small Signal Response
INPUT (50mV/div)
OUTPUT (50mV/div)
OUTPUT (50mV/div)
INPUT (50mV/div)
V = 5V Av = -1 CL = 1.7pF RL = 1M RF = 1k
V = 9V Av = -1 CL = 1.7pF RL = 1M RF = 1k
TIME (100ns/div)
TIME (100ns/div)
Small Signal Response
Small Signal Response
INPUT (50mV/div)
OUTPUT (50mV/div)
OUTPUT (50mV/div)
INPUT (50mV/div)
V = 9V Av = -1 CL = 100pF RL = 1M RF = 1k TIME (100ns/div)
V = 5V Av = -1 CL = 100pF RL = 1M RF = 1k
TIME (100ns/div)
Small Signal Response
Small Signal Response
INPUT (50mV/div)
OUTPUT (50mV/div)
OUTPUT (50mV/div)
INPUT (50mV/div)
V = 5V Av = -1 CL = 1000pF RL = 1M RF = 1k TIME (100ns/div)
V = 9V Av = -1 CL = 1000pF RL = 1M RF = 1k TIME (100ns/div)
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MIC923
Micrel
Small Signal Response
Small Signal Response
INPUT (50mV/div)
OUTPUT (100mV/div)
V = 5V Av = 2 CL = 1.7pF RL = 1M RF = 2k TIME (100ns/div)
OUTPUT (100mV/div)
INPUT (50mV/div)
V = 9V Av = 2 CL = 1.7pF RL = 1M RF = 2k TIME (100ns/div)
Small Signal Response
Small Signal Response
INPUT (50mV/div)
OUTPUT (100mV/div)
V = 5V Av = 2 CL = 100pF RL = 1M RF = 2k
OUTPUT (50mV/div)
INPUT (50mV/div)
V = 9V Av = 2 CL = 100pF RL = 1M RF = 2k TIME (100ns/div)
TIME (100ns/div)
Small Signal Response
Small Signal Response
OUTPUT (100mV/div)
INPUT (50mV/div)
OUTPUT (100mV/div)
INPUT (50mV/div)
V = 5V Av = 2 CL = 1000pF RL = 1M RF = 2k TIME (100ns/div)
V = 9V Av = 2 CL = 1000pF RL = 1M RF = 2k
TIME (100ns/div)
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Micrel
Large Signal Response
Large Signal Response
OUTPUT (1V/div)
V = 5V Av = 2 CL = 1.7pF RL = 1M RF = 2k Positive Slew Rate = 970V/s Negative Slew Rate = 720V/s TIME (10ns/div)
OUTPUT (100mV/div)
V = 9V Av = 2 CL = 1.7pF RL = 1M RF = 2k Positive Slew Rate = 2100V/s Negative Slew Rate = 2200V/s TIME (10ns/div)
Large Signal Response
Large Signal Response
OUTPUT (100mV/div)
V = 5V Av = 2 CL = 100pF RL = 1M RF = 2k Positive Slew Rate = 440V/s Negative Slew Rate = 340V/s TIME (25ns/div)
OUTPUT (2V/div)
V = 5V Av = 2 CL = 100pF RL = 1M RF = 2k Positive Slew Rate = 700V/s Negative Slew Rate = 500V/s TIME (25ns/div)
Large Signal Response
Large Signal Response
OUTPUT (1V/div)
V = 5V Av = 2 CL = 1000pF RL = 1M RF = 2k Positive Slew Rate = 70V/s Negative Slew Rate = 45V/s TIME (100ns/div)
OUTPUT (2V/div)
V = 9V Av = 2 CL = 1000pF RL = 1M RF = 2k Positive Slew Rate = 87V/s Negative Slew Rate = 57V/s TIME (100ns/div)
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MIC923
MIC923
Micrel
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 SC70-5 package, like all small packages, have 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 par-ticular CMRR will reduce. An MIC923 with no load, dissipates power equal to the quiescent supply current x 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 MIC923 is a high-speed, voltage-feedback operational amplifier featuring very low supply current and excellent stability. This device is unity gain stable, capable of driving high capacitance loads. Driving High Capacitance The MIC923 is stable when driving high capacitance, making it ideal for driving long coaxial cables or other high-capacitance loads. Most high-speed op amps are only able to drive limited capacitance. Note: increasing load capacitance does reduce the speed of the device. 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 MIC923 is NOT a current feedback device. Also, for minimum peaking, the feedback resistor should have low parasitic capacitance, usually 470 is ideal. To use the part as a follower, the output should be connected to input via a short wire. Layout Considerations 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. 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 SC70-5 package has a thermal resistance of 450C/W.
Max. AllowablePowerDissipation =
TJ(max) - TA(max) 450C / W
MIC923
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MIC923
Micrel
Package Information
0.65 (0.0256) BSC
1.35 (0.053) 2.40 (0.094) 1.15 (0.045) 1.80 (0.071) 2.20 (0.087) 1.80 (0.071) DIMENSIONS: MM (INCH) 1.00 (0.039) 1.10 (0.043) 0.80 (0.032) 0.80 (0.032) 0.18 (0.007) 0.10 (0.004)
0.30 (0.012) 0.15 (0.006)
0.10 (0.004) 0.00 (0.000)
0.30 (0.012) 0.10 (0.004)
SC-70 (C5)
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) 2002 Micrel Incorporated
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MIC923

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