lm134-mdc National Semiconductor Corporation, lm134-mdc Datasheet
lm134-mdc
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lm134-mdc Summary of contents
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... AC applications. The sense voltage used to establish operating current in the LM134 is 64mV at 25˚C and is directly proportional to abso- lute temperature (˚K). The simplest one external resistor connection, then, generates a current with ≈+0.33%/˚C tem- perature dependence ...
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... Infrared (15 sec.) 5V See AN-450 “Surface Mounting Methods and Their Effect Product Reliability” (Appendix D) for other methods of sol- 400 mW dering surface mount devices. 2000V −55˚C to +125˚C (Note 2) Conditions LM134/LM234 Min Typ ≤ 1mA SET < ≤ 5mA I SET < 10µA SET ≤ ...
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... I Temperature Dependence of Set Current (Note 4) and Equivalent Slope Error Effective Shunt Capacitance (Note 2) (Continued) at any temperature can be calculated from: I SET max is: J LM134 150˚C LM234 125˚C LM334 100˚C TO-92 180˚C/W (0.4" leads) 160˚C/W (0.125" leads) ...
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Typical Performance Characteristics Output Impedance Start-Up Voltage Across R www.national.com 00569730 00569732 (V ) SET R 00569734 4 Maximum Slew Rate Linear Operation 00569731 Transient Response 00569733 Current Noise 00569735 ...
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... Typical Performance Characteristics Turn-On Voltage Application Hints The LM134 has been designed for ease of application, but a general discussion of design features is presented here to familiarize the designer with device characteristics which may not be immediately obvious. These include the effects of slewing, power dissipation, capacitance, noise, and con- tact resistance ...
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... NOISE Current noise generated by the LM134 is approximately 4 times the shot noise of a transistor. If the LM134 is used as an active load for a transistor amplifier, input referred noise will be increased by about 12dB. In many cases, this is acceptable and a single stage amplifier can be built with a voltage gain exceeding 2000 ...
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... If the measured tempco of I positive, R negative, R for use in this circuit is the 1N457 because its tempco is centered at 11 times the tempco of the LM134, allowing You can also use this circuit to create a current source 1 with non-zero tempcos by setting the tempco component of the tempco equation to the desired value instead of 0 ...
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... REF REF Trim R3 to calibrate www.national.com Terminating Remote Sensor for Voltage Output Low Output Impedance Thermometer *Output impedance of the LM134 at the “R” pin is approximately ± 4% from where R is the equivalent external resistance connected from the ground. This negative resistance can be reduced by a factor more by inserting an equivalent resistor R output ...
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Typical Applications (Continued) *Select R1 and C1 for optimum stability Micropower Bias Higher Output Current 00569705 Basic 2-Terminal Current Source 00569701 Low Input Voltage Reference Driver 00569717 9 00569718 www.national.com ...
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Typical Applications 1.2V Reference Operates on 10 µA and 2V *Select ratio obtain zero temperature drift 1.2V Regulator with 1.8V Minimum Input *Select ratio for zero temperature drift www.national.com (Continued) Ramp ...
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... Typical Applications (Continued) FET Cascoding for Low Capacitance and/or Ultra High Output Impedance *Select ensure at least 1V across the LM134 ≥ 1.2V SET DSS Generating Negative Output Impedance 00569723 ≈ −16 • R1 (R1/V *Z must not exceed I OUT IN SET Buffer for Photoconductive Cell ...
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Schematic Diagram (Continued) www.national.com 00569711 12 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM134H, LM234H or LM334H NS Package Number H03H SO Package (M) Order Number LM334M, LM334MX, LM334SM or LM334SMX NS Package Number M08A 13 www.national.com ...
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM334Z, LM234Z-3 or LM234Z-6 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time ...