View MIC922BC5_1062966.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MIC922
Micrel
MIC922
230MHz Low-Power SC-70 Op Amp Final Information
General Description
The MIC922 is a high-speed operational amplifier with a gainbandwidth product of 230MHz. The part is unity gain stable. It has a very low 2.5mA supply current, and features the TeenyTM SC-70 package. Supply voltage range is from 2.5V to 9V, allowing the MIC922 to be used in low-voltage circuits or applications requiring large dynamic range. The MIC922 is stable driving any capacitative load and achieves excellent PSRR and CMRR, making it much easier to use than most conventional high-speed devices. Low supply voltage, low power consumption, and small packing make the MIC922 ideal for portable equipment. The ability to drive capacitative loads also makes it possible to drive long coaxial cables.
Features
* * * * * * * 230MHz gain bandwidth product 400MHz -3dB bandwidth 2.5mA supply current SC-70 package 1500V/s slew rate Drives any capacitive load Unity gain stable
Applications
* * * * * Video Imaging Ultrasound Portable equipment Line drivers
Ordering Information
Part Number MIC922BC5 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
A39
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)
Teeny is a trademark of Micrel, Inc. Micrel, Inc. * 1849 Fortune Drive * San Jose, CA 95131 * USA * tel + 1 (408) 944-0800 * fax + 1 (408) 944-0970 * http://www.micrel.com
March 2002
1
MIC922
MIC922
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 SC-70-5 (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 PM BW SR ISC IS Unity Gain-Bandwidth Product Phase Margin -3dB Bandwidth Slew Rate Short-Circuit Output Current CL = 1.7pF CL = 1.7pF Av = 1, CL = 1.7pF C=1.7pF, Gain=1, VOUT=4VPP negative SR = 360V/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 -2.6 200 49 320 420 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 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
MIC922
2
March 2002
MIC922
Symbol AVOL VOUT GBW PM BW 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 Unity Gain-Bandwidth Product Phase Margin -3dB Bandwidth Slew Rate Short-Circuit Output Current CL = 1.7pF CL = 1.7pF AV = 1, CL = 1.7pF C=1.7pF, Av =1, VOUT=8VPP, positive SR = 750V/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 -7.5 230 44 400 1500 70 40 84 50 2.5 9 1.1 3 -7 Max Units dB dB V V MHz 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."
March 2002
3
MIC922
MIC922
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
MIC922
1 2
4
MIC922
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
MIC922
1 2
To Dynamic Analyzer
MIC922 VIN 50
1 2
4
300
VOUT FET Probe
0.1F
R5 20
R4 27k
0.1F
CL
10pF V-
10F
10F
V-
Noise Measurement
Closed Loop Frequency Response Measurement
MIC922
4
March 2002
MIC922
Micrel
Typical Characteristics
Supply Current vs. Temperature
2.70
SUPPLY CURRENT (mA) 2.60
Supply Current vs. Supply Voltage
1.4 OFFSET VOLTAGE (mV)
-40C 25C 2.55 2.50 2.45 2.40 2.35 2.30 2.25 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 SUPPLY VOLTAGE (V) 85C
Offset Voltage vs. Temperature
1.2 1 0.8 0.6 0.4 0.2 0 -40 -20 0 20 V = 5V V = 9V 40 60 80 100 V = 2.5V
SUPPLY CURRENT (mA)
2.65 2.60 2.55 2.50 2.45 2.40 2.35 2.30 2.25 -40 -20 0 V = 5V
V = 9V
V = 2.5V 20 40 60 80 100
TEMPERATURE (C)
TEMPERATURE (C)
Offset Voltage vs. Common-Mode Voltage
8 7 6 5 4 3 2 1 0 -1 -2 -3 V = 5V
OFFSET VOLTAGE (mV)
Offset Voltage vs. Common-Mode Voltage
8 7 6 5 4 3 2 1 0 -1 -2 -3 V = 9V
OUTPTU VOLTAGE (V)
Output Voltage vs. Output Current
5.5 5.0 Sourcing V = 5V 4.5 4.0 3.5 3.0 2.5 -40C 2.0 1.5 85C 1.0 0.5 25C 0 0 10 20 30 40 50 60 70 80 OUTPUT CURRENT (mA)
OFFSET VOLTAGE (mV)
25C
-40C
25C
-40C
85C
85C
-9.0
-7.2 -5.4
-3.6 -1.8
0 1.8 3.6
5.4 7.2
-5 -4 -3 -2 -1 0 1 2 3 4 5 COMMON-MODE VOLTAGE (V)
COMMON-MODE VOLTAGE (V)
Output Voltage vs. Output Current
9.9 9.0 Sourcing V = 9V 8.1 7.2 6.3 -40C 5.4 4.5 3.6 2.7 +25C 1.8 +85C 0.9 0 0 10 20 30 40 50 60 70 80 90 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V)
Output Voltage vs. Output Current
0.5 Sinking 0 V = 5V -0.5 -1.0 -1.5 -2.0 -40C -2.5 25C -3.0 -3.5 -4.0 85C -4.5 -5.0 -50-45-40-35-30-25-20-15-10 -5 0 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V)
9.0
Output Votage vs. Output Current
0.9 Sinking 0.0 V = 9V -0.9 -1.8 25C -2.7 -3.6 -4.5 -5.4 -40C -6.3 -7.2 -8.1 85C -9.0 -60-54-48-42-36-30-24-18-12 -6 0 OUTPUT CURRENT (mA)
Short-Circuit Current vs. Supply Voltage
99 90 Sourcing 81 72 63 54 45 36 27 18 9 0 2.0 2.7 3.4 -40C
NOISE VOLTAGE (nV/HZ)
Short Circuit Current vs. Supply Voltage
6 0 -6 -12 -18 -24 -30 -36 -42 -48 -54 -60
Bias Current vs. Temperature
3 INPUT BIAS CURRENT (A) 2.5 2 1.5 1 0.5 0 -40 -20 0 20 V = 9V V = 5V V = 2.5V
SHORT-CIRCUIT CURRENT (mA)
Sinking
85C 25C
25C
85C
-40C
2.0 2.7 3.4 4.1 4.8 5.5 6.2 6.9 7.6 8.3 9.0
4.1 4.8
5.5 6.2 6.9
7.6 8.3
9.0
40
60
80 100
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
March 2002
5
MIC922
MIC922
Micrel
Bias 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
60
Open-Loop Frequency Response
180 60
Open-Loop Frequency Response
180
Phase RL = 100
GAIN BANDWIDTH (MHz)
GAIN BANDWIDTH (MHz)
BIAS CURRENT (V)
PHASE MARGIN ()
-40C 25C
30 20
No Load
45 0 -45 -90 -135 -180 -225 -270
30 20 10 0 -10 -20
No Load Gain
45 0 -45 -90 -135 -180 -225 -270
10 Gain Bandwidth 0 RL = 100 -10 -20 -30 V = 9V -40 100M 10M 1M CAPACITIVE LOAD (pF)
RL = 100
85C
-30 V = 5V -40 100M 10M 1M CAPACITIVE LOAD (pF)
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
SUPPLY VOLTAGE (V)
Gain Bandwidth and Phase Margin vs. Load
250
GAIN BANDWIDTH (MHz)
Gain Bandwidth and Phase Margin vs. Load
60
GAIN BANDWIDTH (MHz) PHASE MARGIN ()
Gain Bandwidth and Phase Margin vs. Supply Voltage
55
GAIN BANDWIDTH (MHz)
V = 9V Phase Margin
250 200 150 100 50 0 0
V = 5V Phase Margin
240 230 220 210 200 190 180 170 160 Gain Bandwidth Phase Margin
50
PHASE MARGIN ()
PHASE MARGIN ()
200 150 100 50 0 0
55 50 45
50 45 40
49 48 47 46 45 44 43 42
Gain Bandwidth
40
Gain Bandwidth
35
35 200 400 600 800 1000 LOAD CAPACITANCE (pF)
30 200 400 600 800 1000 LOAD CAPACITANCE (pF)
41 150 40 0 1 2 3 4 5 6 7 8 9 10 SUPPLY VOLTAGE (V)
Positive Slew Rate
800
Negative Slew Rate
1400 1200
SLEW RATE (V/s)
Positive Slew Rate
450 400 V = 5V
POSITIVE SLEW RATE (V/s)
700 600 500 400 300 200 100
V = 9V
V = 9V
1000 800 600 400 200
SLEW RATE (V/s)
350 300 250 200 150 100 50 0
0 100
0 100
900 1000
900 1000
0 100
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Negative Slew Rate
400 350 SLEW RATE (V/s) 300 250 200 150 100 50 0 0 200 400 600 800 1000 LOAD CAPACITANCE (pF) CLOSED-LOOP GAIN (dB) V = 5V 100 90 80 70 60 50 40 30 20 10 0 1x106 1M
Closed Loop Gain vs. Frequency
CLOSED-LOOP GAIN (dB) V = 5V
1.7pF 220pF 100pF 1000pF 800pF 600pF
Closed-Loop Gain vs. Frequency
30 20 10 0 -10 -20 -30 -40 -50 -60 -70 6 1x10 1M
100pF 1000pF 800pF 600pF 220pF 400pF
V = 9V
1.7pF
10x106 10M
100x106 100M
500x106
FREQUENCY (Hz)
10x10 100x10 100M 10M FREQUENCY (Hz)
6
6
MIC922
6
March 2002
900 1000
500x106
200 300
400
500 600
700 800
200 300 400
500 600
700 800
200 300
400
500 600
700 800
0
0
PHASE MARGIN ()
50 40
Phase Margin
RL = 100
135 90
50 40
135 90
MIC922
Micrel
Open-Loop Gain vs. Frequency
60 OPEN-LOOP GAIN (dB) 50 40 30 20 10 0 -10 -20 -30 -40 1M
1.7pF 50pF 100pF 225pF 1000pF 675pF 450pF
Open-Loop Gain vs. Frequency
60 OPEN-LOOP GAIN (dB) 50 40 30 20 10 0 -10 -20 -30 -40 1M
1.7pF 50pF 100pF 225pF
V = 5V
V = 9V
450pF 675pF 1000pF
10M 100M FREQUENCY (Hz)
100M 10M FREQUENCY (Hz)
March 2002
7
MIC922
MIC922
Micrel
Functional Characteristics
Small Signal Response
Small Signal Response
INPUT (50mV/div)
V = 5.0V Av = 1 CL = 1.7F RL = 1M
INPUT (50mV/div)
V = 9.0V Av = 1 CL = 1.7F RL = 1M
OUTPUT (50mV/div)
TIME (100ns/div)
OUTPUT (50mV/div)
TIME (100ns/div)
Small Signal Response
Small Signal Response
INPUT (50mV/div)
INPUT (50mV/div)
V = 5.0V Av = 1 CL = 100pF RL = 1M
V = 9.0V Av = 1 CL = 100pF RL = 1M
OUTPUT (50mV/div)
TIME (100ns/div)
OUTPUT (50mV/div)
TIME (100ns/div)
Small Signal Response
Small Signal Response
INPUT (50mV/div)
INPUT (50mV/div)
V = 5.0V Av = 1 CL = 1000pF RL = 1M
V = 9.0V Av = 1 CL = 1000pF RL = 1M
OUTPUT (50mV/div)
OUTPUT (50mV/div)
TIME (100ns/div)
TIME (100ns/div)
MIC922
8
March 2002
MIC922
Micrel
Large Signal Response
Large Signal Response
OUTPUT (1V/div)
V = 5.0V Av = 1 CL = 1.7F RL = 1M Positive Slew Rate = 418V/s Negative Slew Rate = 356V/s TIME (25ns/div)
OUTPUT (2V/div)
V = 9.0V Av = 1 CL = 1.7F RL = 1M Positive Slew Rate = 747V/s Negative Slew Rate = 1320V/s TIME (25ns/div)
Large Signal Response
Large Signal Response
OUTPUT (1V/div)
V = 5.0V Av = 1 CL = 100pF RL = 1M Positive Slew Rate = 350V/s Negative Slew Rate = 303V/s TIME (25ns/div)
OUTPUT (2V/div)
V = 9.0V Av = 1 CL = 100pF RL = 1M Positive Slew Rate = 274V/s Negative Slew Rate = 274V/s TIME (25ns/div)
Large Signal Response
Large Signal Response
OUTPUT (2V/div)
OUTPUT (1V/div)
V = 5.0V Av = 1 CL = 1000pF RL = 1M Positive Slew Rate = 106V/s Negative Slew Rate = 66V/s TIME (250ns/div)
V = 9.0V Av = 1 CL = 1000pF RL = 1M Positive Slew Rate = 78V/s Negative Slew Rate = 51V/s TIME (250ns/div)
March 2002
9
MIC922
MIC922
Micrel
It is important to ensure adequate supply bypassing capacitors are located close to the device. 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, 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 par-ticular CMRR will reduce. An MIC922 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 MIC922 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 MIC922 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/Capacitor Selection Conventional op amp gain configurations and resistor selection apply, the MIC922 is NOT a current feedback device. Also, for minimum peaking, the feedback resistor should have low parasitic capacitance. To use the part as a follower, the output should be connected to input via a short wire. At high frequency, the parasitic capacitance at the input might cause peaking in the closed-loop frequency response. A 1pF capacitor should be used across the feedback resistor to compensate for this parasitic peaking. 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.
(
)
(
)
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
MIC922
10
March 2002
MIC922
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)
March 2002
11
MIC922
MIC922
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) 2002 Micrel Incorporated
MIC922
12
March 2002

▲Up To Search▲

Price & Availability of MIC922BC5

	To Download MIC922BC5 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .