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Part: MAX494E
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> Operational Amplifiers
Description: Single/Dual/Quad, Micropower, Single-Supply, Rail-to-rail op Amps
Company: Maxim Integrated Products
Datasheet: Download MAX494E datasheet File size : 687 kB
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Datasheet text preview:
19-0265; Rev 2; 9/96
Single/Dual/Quad, Micropower, 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 VCC to VEE, the devices can operate from either a single supply (+2.7V to +6V) or split supplies (±1.35V to ±3V). Each op amp requires less than 150µA supply current. Even with this low current, the op amps are capable of driving a 1k load, and the input referred voltage noise is only 25nV/Hz. In addition, these op amps can drive loads in excess of 1nF. The precision performance of the MAX492/MAX494/ MAX495, combined with their wide input and output dynamic range, low-voltage single-supply operation, and very low supply current, makes them an ideal choice for battery-operated equipment and other low-voltage applications. The MAX492/MAX494/MAX495 are available in DIP and SO packages in the industry-standard op-amp pin configurations. The MAX495 is also available in the smallest 8-pin SO: the µMAX package.
____________________________Features
o o o o o o o o o o o o o Low-Voltage Single-Supply Operation (+2.7V to +6V) Rail-to-Rail Input Common-Mode Voltage Range Rail-to-Rail Output Swing 500kHz Gain-Bandwidth Product Unity-Gain Stable 150µA Max Quiescent Current per Op Amp No Phase Reversal for Overdriven Inputs 200µV Offset Voltage High Voltage Gain (108dB) High CMRR (90dB) and PSRR (110dB) Drives 1k Load Drives Large Capacitive Loads MAX495 Available in µMAX Package--8-Pin SO
MAX492/MAX494/MAX495
______________Ordering Information
PART MAX492CPA MAX492CSA MAX492C/D MAX492EPA MAX492ESA MAX492MJA TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP
________________________Applications
Portable Equipment Battery-Powered Instruments Data Acquisition Signal Conditioning Low-Voltage Applications
Ordering Information continued at end of data sheet. *Dice are specified at TA = +25°C, DC parameters only.
__________Typical Operating Circuit
_________________Pin Configurations
TOP VIEW
+5V 1 VDD 10k 2
OUT1 1 IN1- 2 IN1+ 3
8 7 6
VCC OUT2 IN2IN2+
7 6 2
MAX187 ( ADC)
AIN
VEE 4 I SERIAL NTERFACE NULL 1 4.096V IN1- 2 IN1+ 3 VEE 4
ANALOG I NPUT 10k
3
MAX495
4
DOUT 6 8 SCLK 7 CS 3 4
MAX492
DIP/SO
5
SHDN REF GND 5
8
N.C. VCC OUT NULL
MAX495
7 6 5
DIP/SO/µMAX
INPUT SIGNAL CONDITIONING FOR LOW-VOLTAGE ADC
Pin Configurations continued at end of data sheet.
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________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps MAX492/MAX494/MAX495
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE) ....7V Common-Mode Input Voltage..........(VCC + 0.3V) to (VEE - 0.3V) Differential Input Voltage ........±(VCC - VEE) Input Current (IN+, IN-, NULL1, NULL2) ..±10mA Output Short-Circuit Duration ...........Indefinite short circuit to either supply Voltage Applied to NULL Pins ...VCC to VEE Continuous Power Dissipation (TA = +70°C) 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW 8-Pin SO (derate 5.88mW/°C above +70°C)........471mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW 8-Pin µMAX (derate 4.1mW/°C above +70°C) .....330mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW 14-Pin SO (derate 8.33mW/°C above +70°C)......667mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mW Operating Temperature Ranges MAX49_C_ _ ........0°C to +70°C MAX49_E_ _......-40°C to +85°C MAX49_M_ _ .........-55°C to +125°C Junction Temperatures MAX49_C_ _/E_ _..........+150°C MAX49_M_ _ ........+175°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10sec) .....+300°C
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.
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 6V, VEE = GND, VCM = 0V, VOUT = VCC / 2, TA = +25°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Bias Current Input Offset Current Differential Input Resistance Common-Mode Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio CONDITIONS VCM = VEE to VCC VCM = VEE to VCC VCM = VEE to VCC MIN TYP ±200 ±25 ±0.5 2 VEE - 0.25 (VEE - 0.25V) VCM (VCC + 0.25V) VCC = 2.7V to 6V VCC = 2.7V, RL = 100k, VOUT = 0.25V to 2.45V VCC = 2.7V, RL = 1k, VOUT = 0.5V to 2.2V VCC = 5.0V, RL = 100k, VOUT = 0.25V to 4.75V VCC = 5.0V, RL = 1k, VOUT = 0.5V to 4.5V RL = 100k RL = 1k Output Short-Circuit Current Operating Supply Voltage Range Supply Current (per amplifier) VCM = VOUT = VCC / 2 VCC = 2.7V VCC = 5V 2.7 135 150 Sourcing Sinking Sourcing Sinking Sourcing Sinking Sourcing Sinking VOH VOL VOH VOL 74 88 90 90 94 78 98 92 98 86 90 110 104 102 105 90 108 100 110 98 dB VCC + 0.25 MAX ±500 ±60 ±6 UNITS µV nA nA M V dB dB
Large-Signal Voltage Gain (Note 1)
VCC - 0.075 VCC - 0.04 VEE + 0.04 VEE + 0.075 VCC - 0.20 VCC - 0.15 VEE + 0.15 VEE + 0.20 30 6.0 150 170 mA V µA V
Output Voltage Swing (Note 1)
2
_______________________________________________________________________________________
Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps
AC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 6V, VEE = GND, TA = +25°C, unless otherwise noted.) PARAMETER Gain-Bandwidth Product Phase Margin Gain Margin Total Harmonic Distortion Slew Rate Time Turn-On Time Input Noise-Voltage Density Input Noise-Current Density Amp-Amp Isolation CONDITIONS RL = 100k, CL = 100pF RL = 100k, CL = 100pF RL = 100k, CL = 100pF RL = 10k, CL = 15pF, VOUT = 2Vp-p, AV = +1, f = 1kHz RL = 100k, CL = 15pF To 0.1%, 2V step VCC = 0V to 3V step, VIN = VCC / 2, AV = +1 f = 1kHz f = 1kHz f = 1kHz MIN TYP 500 60 10 0.003 0.20 12 5 25 0.1 125 MAX UNITS kHz degrees dB % V/µs µs µs nV/Hz pA/Hz dB
MAX492/MAX494/MAX495
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 6V, VEE = GND, VCM = 0V, VOUT = VCC / 2, TA = 0°C to +70°C, unless otherwise noted.) PARAMETER Input Offset Voltage Input Offset Voltage Tempco Input Bias Current Input Offset Current Common-Mode Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio VCM = VEE to VCC VCM = VEE to VCC VEE - 0.20 (VEE - 0.20) VCM (VCC + 0.20) VCC = 2.7V to 6V VCC = 2.7V, RL = 100k, VOUT = 0.25V to 2.45V Large-Signal Voltage Gain (Note 1) VCC = 2.7V, RL = 1k, VOUT = 0.5V to 2.2V VCC = 5.0V, RL = 100k, VOUT = 0.25V to 4.75V VCC = 5.0V, RL = 1k, VOUT = 0.5V to 4.5V Output Voltage Swing (Note 1) Operating Supply Voltage Range Supply Current (per amplifier) VCM = VOUT = VCC / 2 VCC = 2.7V VCC = 5V RL = 100k RL = 1k Sourcing Sinking Sourcing Sinking Sourcing Sinking Sourcing Sinking VOH VOL VOH VOL 2.7 VCC - 0.20 VEE + 0.20 6.0 175 190 V µA 72 86 88 84 92 76 92 88 96 82 VCC - 0.075 VEE + 0.075 V dB VCM = VEE to VCC ±2 ±75 ±6 VCC + 0.20 CONDITIONS MIN TYP MAX ±650 UNITS µV µV/°C nA nA V dB dB
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