MAX4491AKA-T ,Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70FeaturesThe MAX4490/MAX4491/MAX4492 single/dual/quad,' +2.7V to +5.5V Single-Supply Operation®low-c ..
MAX4491AKA-T ,Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70MAX4490/MAX4491/MAX449219-1525; Rev 1; 1/00Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC ..
MAX4491AUA ,Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70MAX4490/MAX4491/MAX449219-1525; Rev 2; 4/01Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC ..
MAX4492AUD ,Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70FeaturesThe MAX4490/MAX4491/MAX4492 single/dual/quad,' +2.7V to +5.5V Single-Supply Operation®low-c ..
MAX4492AUD ,Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70ApplicationsMAX4491AKA-T -40°C to +125°C 8 SOT23-8 AADBSensor AmplifiersMAX4492AUD -40°C to +125°C ..
MAX4492AUD+ ,Low-Cost, High-Slew-Rate, Rail-to-Rail I/O Op Amps in SC70ApplicationsPIN- TOPPART TEMP RANGEBattery-Powered InstrumentsPACKAGE MARKPortable EquipmentMAX4490 ..
MAX8517EUB+ ,1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulatorsfeatures a power-OK (POK) output that /V Denotes an automotive qualified part. transitions high whe ..
MAX8517EUB+T ,1.425V to 3.6V Input, 1A, 0.2V Dropout LDO Regulatorsfeatures include MAX8517EUB -40°C to +85°C 10 µMAXa logic-controlled shutdown mode, short-circuit p ..
MAX851ISA ,Low-Noise / Regulated / Negative Charge-Pump Power Supplies for GaAsFET Bias
MAX851ISA ,Low-Noise / Regulated / Negative Charge-Pump Power Supplies for GaAsFET Bias
MAX8520ETP ,Smallest TEC Power Drivers for Optical ModulesFeaturesThe MAX8520/MAX8521 are designed to drive thermo- 2 Circuit Footprint of 0.31inelectric co ..
MAX8521ETP+T ,Smallest TEC Power Drivers for Optical ModulesFeaturesThe MAX8520/MAX8521 are designed to drive thermo-2♦ Circuit Footprint 0.31inelectric cooler ..
MAX4490AXK-T-MAX4491AKA-T-MAX4492AUD
Low-Cost / High-Slew-Rate / Rail-to-Rail I/O Op Amps in SC70
General DescriptionThe MAX4490/MAX4491/MAX4492 single/dual/quad,
low-cost CMOS op amps feature Rail-to-Rail®input and
output capability from either a single +2.7V to +5.5V
supply or dual ±1.35V to ±2.75V supplies. These ampli-
fiers exhibit a high slew rate of 10V/μs and a gain-band-
width product of 10MHz. They can drive 2kWresistive
loads to within 55mV of either supply rail and remain
unity-gain stable with capacitive loads up to 300pF.
The MAX4490 is offered in the ultra-small, 5-pin SC70
package, which is 50% smaller than the standard 5-pin
SOT23 package. Specifications for all parts are guaran-
teed over the automotive (-40°C to +125°C) tempera-
ture range.
ApplicationsBattery-Powered Instruments
Portable Equipment
Audio Signal Conditioning
Low-Power/Low-Voltage Applications
Sensor Amplifiers
RF Power Amplifier Control
High-Side/Low-Side Current Sensors
Features+2.7V to +5.5V Single-Supply Operation10V/μs Slew RateRail-to-Rail Input Common-Mode Voltage RangeRail-to-Rail Output Voltage Swing10MHz Gain-Bandwidth ProductUnity-Gain Stable with Capacitive Loads
Up to 300pF50pA Input Bias CurrentUltra-Small, 5-Pin SC70 Package (MAX4490)
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC7019-1525; Rev 1; 1/00
Capacitive Load Stability
Ordering InformationRail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations/
Functional Diagrams
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +5V, VSS= 0, VCM= 0, VOUT= VDD/2, RL= 100kWconnected to VDD/2, TA= TMINto TMAX, unless otherwise noted. Typical
values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VDDto VSS)..................................................+6V
All Other Pins...................................(VSS- 0.3V) to (VDD+ 0.3V)
Output Short-Circuit Duration.................................................10s
Continuous Power Dissipation (TA= +70°C)
5-Pin SC70 (derate 2.5mW/°C above +70°C)............200mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW
8-Pin SOT23 (derate 5.26mW/°C above +70°C)........421 mW
14-Pin TSSOP (derate 8.3mW/°C above +70°C).......667mW
14-Pin SO (derate 8.3mW/°C above +70°C)..............667mW
Operating Temperature Range........................-40°C to +125°C
Junction Temperature.....................................................+150°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering, 10s)................................+300°C
Note 1:All units production tested at TA= +25°C. Limits over temperature guaranteed by design.
Note 2:Guaranteed by the Power-Supply Rejection Ratio (PSRR) test.
Note 3:Input Offset Voltage, Input Bias Current, and Input Offset Current are all tested and guaranteed at both ends of the common-
mode range.
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
Typical Operating Characteristics(VDD= +5V, VSS= 0, VCM= VDD/2, RL= 100kΩto VDD/2, TA= +25°C, unless otherwise noted.)
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
Typical Operating Characteristics (continued)(VDD= +5V, VSS= 0, VCM= VDD/2, RL= 100kΩto VDD/2, TA= +25°C, unless otherwise noted.)
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
Pin Description
Detailed Description
Rail-to-Rail Input StageThe MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers have parallel-connected N- and P-channel
differential input stages that combine to accept a com-
mon-mode range extending to both supply rails. The N-
channel stage is active for common-mode input
voltages typically greater than (VSS+ 1.2V), and the P-
channel stage is active for common-mode input volt-
ages typically less than (VDD- 1.2V).
Rail-to-Rail Output StageThe MAX4490/MAX4491/MAX4492 CMOS operational
amplifiers feature class-AB push-pull output stages that
can drive a 100kWload to within 1.5mV of either supply
rail. Short-circuit output current is typically ±50mA.
Figures 1a and 1b show the typical temperature depen-
dence of output source and sink currents, respectively,
for three fixed values of (VDD- VOH) and (VOL- VSS).
For example, at VDD= +5.0V, the load currents that
maintain (VDD- VOH) = 100mV and (VOL- VSS) = 100mV
at TA= +25°C are 2.2mA and 3.3mA, respectively,
when the load is connected to VDD/2. Consistent resis-
tive drive capability is (2.5 - 0.1) / 2.2 = 1.1kW. For the
same application, resistive drive capability is 2.2kW
when the load is connected to VDDor VSS.
Applications Information
Power-Supply ConsiderationsThe MAX4490/MAX4491/MAX4492 operate from a sin-
gle +2.7V to +5.5V supply or from dual ±1.35V to
±2.75V supplies with typically 800μA supply current
per amplifier. A high power-supply rejection ratio of
100dB allows for extended operation from a decaying
battery voltage, thereby simplifying designs for
portable applications. For single-supply operation,
bypass the power supply with a 0.1μF ceramic capaci-
tor placed close to the VDDpin. For dual-supply opera-
tion, bypass each supply to ground.
Input CapacitanceOne consequence of the parallel-connected differential
input stages for rail-to-rail operation is a relatively large
input capacitance CIN(typically 5pF). This introduces a
pole at frequency (2pR¢CIN)-1, where R¢is the parallel
combination of the gain-setting resistors for the invert-
ing or noninverting amplifier configuration (Figure 2). If
the pole frequency is less than or comparable to the
unity-gain bandwidth (10MHz), the phase margin will
be reduced, and the amplifier will exhibit degraded
AC performance through either ringing in the step
response or sustained oscillations. The pole frequency is
10MHz when R¢= 3.2kW. To maximize stability, R¢<3kW
is recommended.
Applications that require rail-to-rail operation with mini-
mal loading (for small VDD- VOHand VOL- VSS) will
typically require R¢values >3kW. To improve step
response under these conditions, connect a small
capacitor Cfbetween the inverting input and output.
Choose Cfas follows: = 5(R / Rf) [pf]
where Rfis the feedback resistor and R is the gain-set-
ting resistor (Figure 2).
Figure 3 shows the step response for a noninverting
amplifier subject to R¢= 4kWwith and without the Cf
feedback capacitor.
MAX4490/MAX4491/MAX4492
Low-Cost, High-Slew-Rate,
Rail-to-Rail I/O Op Amps in SC70
