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LT1639CS Datasheet(PDF) 1 Page - Linear Technology |
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LT1639CS Datasheet(HTML) 1 Page - Linear Technology |
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1 / 16 page  1 LT1638/LT1639 16389fd APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATIO 1.2MHz, 0.4V/ μs Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps ■ Operates with Inputs Above V + ■ Rail-to-Rail Input and Output ■ Low Power: 230 μA per Amplifier Max ■ Gain Bandwidth Product: 1.2MHz ■ Slew Rate: 0.4V/ μs ■ High Output Current: 25mA Min ■ Specified on 3V, 5V and ±15V Supplies ■ Reverse Battery Protection to 18V ■ No Supply Sequencing Problems ■ High Voltage Gain: 1500V/mV ■ Single Supply Input Range: – 0.4V to 44V ■ High CMRR: 98dB ■ No Phase Reversal ■ Available in 14-Lead SO, 8-Lead MSOP and DFN Packages ■ Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning ■ Supply Current Sensing ■ Battery Monitoring ■ Micropower Active Filters ■ 4mA to 20mA Transmitters VCC VCC V1 V2 V0 – + A 1/2 LT1638 – + B 1/2 LT1638 VCC 1M 1M 1M 10k 10k VCC = 5V, VCM = 0V TO 44V, tPD = 27μs 1638/39 TA01 1M Over-The-Top ® Comparator with 100mV Hysteresis Centered at 0mV Output Voltage vs Input Voltage 5V 0V The LT ®1638 is a low power dual rail-to-rail input and output operational amplifier available in the standard 8-pin PDIP and SO packages as well as the 8-lead MSOP package. The LT1639 is a low power quad rail-to-rail input and output operational amplifier offered in the standard 14-pin PDIP and surface mount packages. For space limited applications the LT1638 is available in a 3mm x 3mm x 0.8mm dual fine pitch leadless package (DFN). The LT1638/LT1639 op amps operate on all single and split supplies with a total voltage of 2.5V to 44V drawing only 170 μA of quiescent current per amplifier. These amplifiers are reverse battery protected and draw no current for reverse supply up to 18V. The input range of the LT1638/LT1639 includes both supplies, and a unique feature of this device is its capability to operate over the top with either or both of its inputs above V+. The inputs handle 44V, both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring when the inputs are below the negative supply. Protective resistors are included in the input leads so that current does not become excessive when the inputs are forced below the negative supply. The LT1638/LT1639 can drive loads up to 25mA and still maintain rail-to-rail capability. The op amps are unity-gain stable and drive all capacitive loads up to 1000pF when optional output compensation is used. 1638/39 TA02 20mV/DIV , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Over-The-Top is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. |
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