MAX494 Maxim, MAX494 Datasheet
MAX494
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MAX494 Summary of contents
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... Not Recommended for New Designs The MAX495 was manufactured for Maxim by an outside wafer foundry using a process that is no longer available not recommended for new designs. A Maxim replacement or an industry second-source may be available. The data sheet remains available for existing users. ...
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... Rev 2; 9/96 Single-Supply Rail-to-Rail Op Amps _______________General Description The dual MAX492, quad MAX494, and single MAX495 operational amplifiers combine excellent DC accuracy with rail-to-rail operation at the input and output. Since the common-mode voltage extends from V the devices can operate from either a single supply (+2.7V to +6V) or split supplies (± ...
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... 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 ...
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Single-Supply Rail-to-Rail Op Amps AC ELECTRICAL CHARACTERISTICS (V = 2. GND +25°C, unless otherwise noted PARAMETER Gain-Bandwidth Product R L Phase Margin R L Gain Margin R L Total Harmonic Distortion ...
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Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps DC ELECTRICAL CHARACTERISTICS (V = 2. GND 0V PARAMETER Input Offset Voltage V CM Input Offset Voltage Tempco Input Bias Current V CM Input ...
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Single-Supply Rail-to-Rail Op Amps DC ELECTRICAL CHARACTERISTICS (V = 2. GND 0V PARAMETER Input Offset Voltage Input Offset Voltage Tempco Input Bias Current Input Offset Current Common-Mode Input Voltage Range ...
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Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps __________________________________________Typical Operating Characteristics (T = +25° 5V 0V, unless otherwise noted GAIN AND PHASE vs. FREQUENCY MAX492- GAIN 40 20 PHASE 0 - ...
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... 110 R = 100k L 100 10k 600 0 100 200 300 400 V (mV) OUT MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE 200 180 L EE 160 140 V = 2.7V 120 100 6V 100k 2.7V 100k 40 ...
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Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps ____________________________Typical Operating Characteristics (continued +25° 5V 0V, unless otherwise noted VOLTAGE-NOISE DENSITY vs. FREQUENCY 100 10 INPUT REFERRED 1 0.01 0.1 1 FREQUENCY (kHz) TOTAL ...
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... Operating Characteristics (continued +25° 5V 0V, unless otherwise noted LARGE-SIGNAL TRANSIENT RESPONSE 50 s/div V = +5V + 10k ______________________________________________________________Pin Description PIN NAME MAX492 MAX494 MAX495 1 1 — OUT1 — — NULL — — — IN1- — — 3 ...
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... NULL pins (pins 1 and 5), with the wiper con- nected to V circuit is ±6mV. External offset adjustment is not avail- able for the dual MAX492 or quad MAX494. The input bias currents of the MAX492/MAX494/MAX495 are typically less than 50nA. The bias current flows into the device when the NPN input stage is active, and it flows out when the PNP input stage is active ...
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... Input Stage Protection Circuitry T he MAX492/MAX494/MAX495 include internal protec- tion circuitry that prevents damage to the precision input stage from large differential input voltages. This protection circuitry consists of back-to-back diodes between IN+ and IN- with two 1 ...
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... Output Loading and Stability Even with their low quiescent current of less than 150µA per op amp, the MAX492/MAX494/MAX495 are well suited for driving loads up to 1kΩ while maintaining DC accuracy. Stability while driving heavy capacitive loads is another key advantage over comparable CMOS rail- to-rail op amps ...
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... Single-Supply Rail-to-Rail Op Amps The MAX492/MAX494/MAX495 can drive capacitive loads in excess of 1000pF under certain conditions (Figure 5). When driving capacitive loads, the greatest potential for instability occurs when the op amp is sourcing approximately 100µA. Even in this case, sta- bility is maintained with up to 400pF of output capaci- tance ...
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... Although supply current is already low sometimes desirable to reduce it further by powering down the op amp and associated ICs for periods of time. For example, when using a MAX494 to buffer the inputs to a multi-channel analog-to-digital con- verter (ADC), much of the circuitry could be powered down between data samples to increase battery life ...
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... IN3 IN3- 8 OUT3 TRANSISTOR COUNT: 134 (single MAX495) SUBSTRATE CONNECTED TO V MAX492 IN1- IN1+ OUT1 0.068" (1.728mm OUT2 IN2- IN2+ 0.069" (1.752mm) MAX495 NULL1 V CC 0.056" (1.422mm) OUT NULL2 V EE 0.055" (1.397mm) 268 (dual MAX492) 536 (quad MAX494 ...
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... B E Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...