LM139J Allicdata Electronics
Allicdata Part #:

296-26084-5-ND

Manufacturer Part#:

LM139J

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Texas Instruments
Short Description: IC COMP QUAD LPWR L OFF V 14CDIPComparator Differe...
More Detail: N/A
DataSheet: LM139J datasheetLM139J Datasheet/PDF
Quantity: 5
Lead Free Status / RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Stock 5Can Ship Immediately
Specifications
Series: LM139
Packaging: Tube
Lead Free Status / RoHS Status: --
Part Status: Active
Moisture Sensitivity Level (MSL): --
Type: Differential
Number of Elements: 4
Output Type: Open-Collector, Open-Drain
Voltage - Supply, Single/Dual (±): 2 V ~ 30 V, ±1 V ~ 15 V
Voltage - Input Offset (Max): 5mV @ 1.4V
Current - Input Bias (Max): 0.1µA @ 1.4V
Current - Output (Typ): 20mA
Current - Quiescent (Max): 2mA
CMRR, PSRR (Typ): --
Propagation Delay (Max): --
Hysteresis: --
Operating Temperature: -55°C ~ 125°C
Package / Case: 14-CDIP (0.300", 7.62mm)
Mounting Type: Through Hole
Supplier Device Package: 14-CDIP
Base Part Number: LM139
Description

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1. Description

The LM139J series consists of four independent precision voltage comparators with an offset voltage specification as low as 2 mV maximum for all four comparators. These comparators were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, even though they are operated from a single power supply voltage. The LMx39-N series was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the devices directly interface with MOS logic— where the low power drain of the LM339 is a distinct advantage over standard comparators.

2. Features

    1. Wide Supply Voltage Range

    2. LM139/139A Series 2 to 36 VDC or ±1 to ±18 VDC

    3. LM2901-N: 2 to 36 VDC or ±1 to ±18 VDC

    4. LM3302-N: 2 to 28 VDC or ±1 to ±14 VDC

    5. Very Low Supply Current Drain (0.8 mA) —Independent of Supply Voltage

    6. Low Input Biasing Current: 25 nA

    7. Low Input Offset Current: ±5 nA

    8. Offset Voltage: ±3 mV

    9. Input Common-Mode Voltage Range Includes GND

  10. Differential Input Voltage Range Equal to the Power Supply Voltage

  11. Low Output Saturation Voltage: 250 mV at 4 mA

  12. Output Voltage Compatible With TTL, DTL, ECL, MOS, and CMOS Logic Systems

  13. Advantages:

        – High-Precision Comparators

        – Reduced VOS Drift Overtemperature

        – Eliminates Need for Dual Supplies

        – Allows Sensing Near GND

        – Compatible With All Forms of Logic

        – Power Drain Suitable for Battery Operation

3. Applications

    1. Limit Comparators

    2. Simple Analog-to-Digital Converters (ADCs)

    3. Pulse, Squarewave, and Time Delay Generators

    4. Wide Range VCO; MOS Clock Timers

    5. Multivibrators and High-Voltage Digital Logic Gates

4. Pin Configuration

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5. Pin Functions

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6. Feature Description

The LM139J series are high-gain, wide bandwidth devices which, like most comparators, can easily oscillate if the output lead is inadvertently allowed to capacitively couple to the inputs through stray capacitance. This shows up only during the output voltage transition intervals as the comparator changes states. Reducing the input resistors to < 10 kΩ reduces the feedback signal levels and finally, adding even a small amount (1 to 10 mV) of positive feedback (hysteresis) causes such a rapid transition that oscillations due to stray feedback are not possible. Simply socketing the IC and attaching resistors to the pins will cause input-output oscillations during the small transition intervals unless hysteresis is used. If the input signal is a pulse waveform, with relatively fast rise and fall times, hysteresis is not required. The differential input voltage may be larger than V+ without damaging the device. Protection should be provided to prevent the input voltages from going negative more than −0.3 VDC (at 25°C). An input clamp diode can be used as shown in the applications section. The output of the LMx39-N series is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied together to provide an output OR'ing function. An output pullup resistor can be connected to any available power supply voltage within the permitted supply voltage range and there is no restriction on this voltage due to the magnitude of the voltage which is applied to the V+ terminal of the LM139A package. The output can also be used as a simple SPST switch to ground (when a pullup resistor is not used). The amount of current which the output device can sink is limited by the drive available (which is independent of V+) and the β of this device. When the maximum current limit is reached (approximately 16 mA), the output transistor will come out of saturation and the output voltage will rise very rapidly. The output saturation voltage is limited by the approximately 60-Ω RSAT of the output transistor. The low offset voltage of the output transistor (4 mV) allows the output to clamp essentially to ground level for small load currents.

7. Device Functional Modes

A basic comparator circuit is used for converting analog signals to a digital output. The output is HIGH when the voltage on the non-inverting (+IN) input is greater than the inverting (-IN) input. The output is LOW when the voltage on the noninverting (+IN) input is less than the inverting (-IN) input. The inverting input (-IN) is also commonly referred to as the "reference" or "VREF" input. All pins of any unused comparators should be tied to the negative supply. The bias network of the LMx39-N series establishes a drain current which is independent of the magnitude of the power supply voltage over the range of from 2 VDC to 30 VDC.

8. Application information

The rated working voltage of LM139-N is 2.0V to 36V (±1V to ±18V), and the temperature range is –55°C to 125°C. Although it seems that the comparator has a well-defined but limited "1 bit" ADC', a comparator is a multifunctional component that can be used for multiple functions.


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