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MIC7111
Micrel
MIC7111
1.8V IttyBittyTM Rail-to-Rail Input/Output Op Amp Final Information
General Description
The MIC7111 is a micropower operational amplifier featuring rail-to-rail input and output performance in Micrel's IttyBittyTM SOT-23-5 package. The MIC7111 is ideal for systems where small size is a critical consideration. The MIC7111 is designed to operate from 1.8V to 11V power supplies. The MIC7111 benefits small battery operated portable electronic devices where small size and the ability to place the amplifier close to the signal source are primary design concerns. For other package options, please contact the factory.
Features
* * * * * Small footprint SOT-23-5 package Guaranteed performance at 1.8V, 2.7V, 5V, and 10V 15A typical supply current at 1.8V 25kHz gain-bandwidth at 5V Output swing to within 1mV of rails with 1.8V supply and 100k load * Suitable for driving capacitive loads
Applications
* * * * * * Wireless and cellular communications GaAs RF amplifier bias amplifier Current sensing for battery chargers Reference voltage buffer Transducer linearization and interface Portable computing
Ordering Information
Part Number Standard MIC7111BM5 Pb-free MIC7111YM5 Junction Temp. Range -40C to +85C Package SOT-23-5
Pin Configuration
IN+
3
Functional Configuration
IN+ V+ OUT
2 1
V+ OUT
2 1
Part Identification
3
A13
4 5
4 5
IN-
V-
IN-
V-
SOT-23-5 (M5)
Pin Description
Pin Number 1 2 3 4 5
IttyBitty 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
Pin Name OUT V+ IN+ IN- V-
Pin Function Amplifier Output Positive Supply Noninverting Input Inverting Input Negative Suppy
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Micrel
Absolute Maximum Ratings (Note 1)
Supply Voltage (VV+ - VV-) ........................................... 12V Differential Input Voltage (VIN+ - VIN-) ........... (VV+ - VV-) I/O Pin Voltage (VIN, VOUT), Note 2 ............................................. VV+ + 0.3V to VV- - 0.3V Junction Temperature (TJ) ...................................... +150C Storage Temperature ............................... -65C to +150C Lead Temperature (soldering, 10 sec.) ..................... 260C ESD, Note 5 .................................................................. 2kV
Operating Ratings (Note 1)
Supply Voltage (VV+ - VV-) .............................. 1.8V to 11V Junction Temperature (TJ) ......................... -40C to +85C Max. Junction Temperature (TJ(max)), Note 3 ........... +85C Package Thermal Resistance (JA), Note 4 .......... 325C/W Max. Power Dissipation ............................................ Note 3
DC Electrical Characteristics (1.8V)
VV+ = +1.8V, VV- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS TCVOS IB IOS RIN +PSRR -PSRR CMRR CIN VOUT Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current Input Resistance Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Common-Mode Rejection Ratio Common Mode Input Capacitance Output Voltage Swing output high, RL = 100k, specified as VV+ - VOUT output low, RL = 100k output high, RL = 2k, specified as VV+ - VOUT output low, RL = 2k ISC AVOL Is Output Short Circuit Current Note 6 Voltage Gain sourcing, VOUT = 0V sinking, VOUT = 1.8V sourcing sinking Supply Current VV+ = 1.8V, VOUT = VV+/2 15 15 1.8V VV+ 5V, VV- = 0V, VCM = VOUT = 0.9V -1.8V VV- -5V, VV+ = 0V, VCM = VOUT = -0.9V VCM = -0.2V to +2.0V 60 60 50 Condition Min Typ 0.9 2.0 1 0.01 >10 85 85 70 3 0.14 0.14 6.8 6.8 25 25 400 400 15 35 1 1 1 1 23 34 23 34 10 500 0.5 75 Max 7 9 Units mV mV V/C pA pA pA pA T dB dB dB pF mV mV mV mV mV mV mV mV mA mA V/mV V/mV A
AC Electrical Characteristics (1.8V)
V+ = +1.8V, V- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted SR GBW Slew Rate Gain Bandwidth Product voltage follower, 1V step, RL = 100k@0.9V VOUT = 1VP-P 0.015 25 V/s kHz
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Micrel
DC Electrical Characteristics (2.7V)
VV+ = +2.7V, VV- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS TCVOS IB IOS RIN +PSRR -PSRR CMRR CIN VOUT Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current Input Resistance Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Common-Mode Rejection Ratio Common Mode Input Capacitance Output Voltage Swing output high, RL = 100k, specified as VV+ - VOUT output low, RL = 100k output high, RL = 2k, specified as VV+ - VOUT output low, RL = 2k ISC AVOL Is Output Short Circuit Current Note 6 Voltage Gain sourcing, VOUT = 0V sinking, VOUT = 2.7V sourcing sinking Supply Current VV+ = 2.7V, VOUT = VV+/2 30 30 2.7V VV+ 5V, VV- = 0V, VCM = VOUT = 1.35V -2.7V VV- -5V, VV+ = 0V, VCM = VOUT = -1.35V VCM = -0.2V to +2.9V 60 60 52 Condition Min Typ 0.9 2.0 1 0.01 >10 90 90 75 3 0.2 0.2 10 10 50 50 400 400 17 42 1 1 1 1 33 50 33 50 10 500 0.5 75 Max 7 9 Units mV mV V/C pA pA pA pA T dB dB dB pF mV mV mV mV mV mV mV mV mA mA V/mV V/mV A
AC Electrical Characteristics (2.7V)
V+ = +2.7V, V- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol SR GBW Parameter Slew Rate Gain Bandwidth Product Condition voltage follower, 1V step, RL = 100k@1.35V VOUT = 1VP-P Min Typ 0.015 25 Max Units V/s kHz
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DC Electrical Characteristics (5V)
VV+ = +5.0V, VV- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS TCVOS IB IOS RIN +PSRR -PSRR CMRR CIN VOUT Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Input Bias Current Input Offset Current Input Resistance Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Common-Mode Rejection Ratio Common Mode Input Capacitance Output Voltage Swing output high, RL = 100k, specified as VV+ - VOUT output low, RL = 100k output high, RL = 2k, specified as VV+ - VOUT output low, RL = 2k ISC AVOL IS Output Short Circuit Current Note 6 Voltage Gain sourcing, VOUT = 0V sinking, VOUT = 5V sourcing sinking Supply Current VV+ = 5V, VOUT = VV+/2 80 80 5V VV+ 10V, VV- = 0V, VCM = VOUT = 2.5V -5V VV- -10V, VV+ = 0V, VCM = VOUT = -2.5V VCM = -0.2V to +5.2V 65 65 57 Condition Min Typ 0.9 2.0 1 0.01 >10 95 95 80 3 0.3 0.3 15 15 100 100 500 500 20 50 1.5 1.5 1.5 1.5 50 75 50 75 10 500 0.5 75 Max 7 9 Units mV mV V/C pA pA pA pA T dB dB dB pF mV mV mV mV mV mV mV mV mA mA V/mV V/mV A
AC Electrical Characteristics (5V)
V+ = +5V, V- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol SR GBW Parameter Slew Rate Gain Bandwidth Product Condition voltage follower, 1V step, RL = 100k@1.5V VOUT = 1VP-P Min Typ 0.02 25 Max Units V/s kHz
DC Electrical Characteristics (10V)
VV+ = +10V, VV- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol VOS TCVOS Parameter Input Offset Voltage Input Offset Voltage Temperature Drift Condition Min Typ 0.9 2.0 Max 7 9 Units mV mV V/C
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MIC7111
Symbol IB IOS RIN +PSRR -PSRR CMRR CIN VOUT Parameter Input Bias Current Input Offset Current Input Resistance Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Common-Mode Rejection Ratio Common Mode Input Capacitance Output Voltage Swing output high, RL = 100k, specified as VV+ - VOUT output low, RL = 100k output high, RL = 2k, specified as VV+ - VOUT output low, RL = 2k ISC AVOL IS Output Short Circuit Current Note 6 Voltage Gain sourcing, VOUT = 0V sinking, VOUT = 10V sourcing sinking Supply Current VV+ = 10V, VOUT = VV+/2 100 100 5V VV+ 10V, VV- = 0V, VCM = VOUT = 2.5V -5V VV- -10V, VV+ = 0V, VCM = VOUT = -2.5V VCM = -0.2V to +10.2V 65 65 60 Condition Min Typ 1 0.01 >10 95 95 85 3 0.45 0.45 24 24 200 200 500 500 25 65 2.5 2.5 2.5 2.5 80 120 80 120 Max 10 500 0.5 75
Micrel
Units pA pA pA pA T dB dB dB pF mV mV mV mV mV mV mV mV mA mA V/mV V/mV A
AC Electrical Characteristics (10V)
V+ = +10V, V- = 0V, VCM = VOUT = VV+/2; RL = 1M; TJ = 25C, bold values indicate -40C TJ +85C; unless noted Symbol SR GBW M GM eN iN
Note 1: Note 2: Note 3:
Parameter Slew Rate Gain Bandwidth Product Phase Margin Gain Margin Input Referred Voltage Noise Input Referred Current Noise
Condition voltage follower, 1V step, RL = 100k@1.35V VOUT = 1VP-P
Min
Typ 0.02 25 50 15
Max
Units V/s kHz dB
nV/ Hz
pA/ Hz
f = 1kHz, VCM = 1.0V f = 1kHz
110 0.03
General Notes: Devices are ESD protected; however, handling precautions are recommended. All limits guaranteed by testing on statistical analysis. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside its recommended operating ratings. I/O Pin Voltage is any external voltage to which an input or output is referenced. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max); the junction-to-ambient thermal resistance, JA; and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD = (TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature. Thermal resistance, JA, applies to a part soldered on a printed-circuit board. Human body model, 1.5k in series with 100pF. Short circuit may cause the device to exceed maxium allowable power dissipation. See Note 3.
Note 4: Note 5: Note 6:
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MIC7111
Micrel Driving Capacitive Loads Driving a capacitive load introduces phase-lag into the output signal, and this in turn reduces op-amp system phase margin. The application that is least forgiving of reduced phase margin is a unity gain amplifier. The MIC7111 can typically drive a 500pF capacitive load connected directly to the output when configured as a unity-gain amplifier. Using Large-Value Feedback Resistors A large-value feedback resistor (> 500k) can reduce the phase margin of a system. This occurs when the feedback resistor acts in conjunction with input capacitance to create phase lag in the fedback signal. Input capacitance is usually a combination of input circuit components and other parasitic capacitance, such as amplifier input capacitance and stray printed circuit board capacitance. Figure 2 illustrates a method of compensating phase lag caused by using a large-value feedback resistor. Feedback capacitor CFB introduces sufficient phase lead to overcome the phase lag caused by feedback resistor RFB and input capacitance CIN. The value of CFB is determined by first estimating CIN and then applying the following formula:
RIN x CIN RFB x CFB
CFB RFB RIN VOUT CIN
Application Information
Input Common-Mode Voltage The MIC7111 tolerates input overdrive by at least 300mV beyond either rail without producing phase inversion. If the absolute maximum input voltage is exceeded, the input current should be limited to 5mA maximum to prevent reducing reliability. A 10k series input resistor, used as a current limiter, will protect the input structure from voltages as large as 50V above the supply or below ground. See Figure 1.
RIN VIN 10k
VOUT
Figure 1. Input Current-Limit Protection Output Voltage Swing Sink and source output resistances of the MIC7111 are equal. Maximum output voltage swing is determined by the load and the approximate output resistance. The output resistance is:
ROUT = VDROP ILOAD
VDROP is the voltage dropped within the amplifier output stage. VDROP and ILOAD can be determined from the VO (output swing) portion of the appropriate Electrical Characteristics table. ILOAD is equal to the typical output high voltage minus V+/2 and divided by RLOAD. For example, using the Electrical Characteristics DC (5V) table, the typical output voltage drop using a 2k load (connected to V+/2) is 0.015V, which produces an ILOAD of: 2.5V - 0.015V = 1.243mA 2k then: ROUT = 15mV = 12.1 12 1.243mA
VIN
Figure 2. Cancelling Feedback Phase Lag Since a significant percentage of CIN may be caused by board layout, it is important to note that the correct value of CFB may
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MIC7111 change when changing from a breadboard to the final circuit layout. Typical Circuits Some single-supply, rail-to-rail applications for which the MIC7111 is well suited are shown in the circuit diagrams of Figures 3 through 7.
V+ 1.8V to 10V VIN
3 2
Micrel
VS 0.5V to Q1 VCEO(sus)
Load
V+ 1.8V to 10V VIN 0V to 2V
3 2
VOUT 0V to V+
MIC7111
1
IOUT Q1 VCEO = 40V 2N3904 IC(max) = 200mA
4 5
{
MIC7111
1
0V to
V+ AV
4 5
VOUT 0V to V+
Change Q1 and RS for higher current and/or different gain.
RS 10 12W
R2 910k R1 100k
V IOUT = IN = 100mA/V as shown RS
Figure 5. Voltage-Controlled Current Sink
R4 100k V+
4 2
Figure 3a. Noninverting Amplifier
C1 0.001F
100 V+
MIC7111
1
VOUT (V)
VOUT
V+ 0V
3
A V = 1+
R2 10 R1
5
V+
0 0 VIN (V) 100
R2 100k R3 100k
R4 100k
Figure 3b. Noninverting Amplifier Behavior
V+ 1.8V to 10V VIN 0V to V+
3 2
Figure 6. Square Wave Oscillator
CIN R1 33k VOUT 0V to V+
4
R2 330k V+
2
MIC7111
1
4 5
MIC7111
1
COUT RL
VOUT
0V
VOUT = VIN
3 5
Figure 4. Voltage Follower/Buffer
V+ R3 330k C1 1F
= = -10 R4 A V = - R1 33k 330k
R2
330k
Figure 7. AC-Coupled Inverting Amplifier
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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)
MICREL INC.
TEL
1849 FORTUNE DRIVE
FAX
SAN JOSE, CA 95131 USA
WEB
+ 1 (408) 944-0800
+ 1 (408) 944-0970
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) 2005 Micrel Incorporated
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