Overview
The LM139AJB is a quad differential comparator produced by National Semiconductor, now part of Texas Instruments. This device is designed to operate over a wide range of supply voltages and is characterized for operation over the full military temperature range of –55°C to 125°C. It consists of four independent voltage comparators, making it versatile for various applications requiring multiple comparison points.
Key Specifications
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| Supply Voltage (Single) | 2 | 30 | V |
| Supply Voltage (Dual) | ±1 | ±18 | V |
| Junction Temperature | –55 | 125 | °C |
| Input Bias Current | 25 nA | ||
| Input Offset Voltage | 2 mV | ||
| Supply Current | 0.8 mA | ||
| Differential Input Voltage Range | ±36 V | ||
| Output Saturation Voltage | Low | ||
| Output Compatibility | TTL, MOS, CMOS |
Key Features
- Wide supply voltage ranges: Single supply from 2 V to 36 V and dual supplies from ±1 V to ±18 V.
- Low supply-current drain independent of supply voltage: 0.8 mA typical.
- Low input bias current: 25 nA typical.
- Low input offset voltage: 2 mV typical.
- Common-mode input voltage range includes ground.
- Differential input voltage range equal to maximum-rated supply voltage: ±36 V.
- Low output saturation voltage.
- Output compatible with TTL, MOS, and CMOS.
Applications
- Industrial applications.
- Automotive applications:
- Infotainment and clusters
- Body control modules
- Power supervision
- Oscillators
- Peak detectors
- Logic voltage translation.
Q & A
- What is the operating temperature range of the LM139AJB?
The LM139AJB operates over a temperature range of –55°C to 125°C.
- What are the supply voltage ranges for the LM139AJB?
The device can operate from a single supply of 2 V to 36 V and from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM139AJB?
The typical supply current is 0.8 mA, independent of the supply voltage.
- What is the input bias current of the LM139AJB?
The typical input bias current is 25 nA.
- What is the input offset voltage of the LM139AJB?
The typical input offset voltage is 2 mV.
- Is the output of the LM139AJB compatible with other logic families?
Yes, the output is compatible with TTL, MOS, and CMOS logic families.
- Can the outputs of the LM139AJB be connected to achieve wired-AND relationships?
Yes, the outputs can be connected to other open-collector outputs to achieve wired-AND relationships.
- What are some common applications of the LM139AJB?
Common applications include industrial, automotive, power supervision, oscillators, peak detectors, and logic voltage translation).
- What are the available package types for the LM139AJB?
The device is available in CDIP, LCCC, CFP, SOIC, and PDIP packages).
- Is the LM139AJB RoHS compliant?
The LM139AJB is available in both RoHS and non-RoHS versions).
