Overview
The LM139AJ/PB is a quad differential comparator produced by Texas Instruments. This device is part of the LM139A series, known for its wide supply voltage range, low input bias current, and high gain. The LM139AJ/PB is designed to operate from a single power supply or dual supplies, making it versatile for various applications. It is characterized by its ability to function over a wide temperature range, including military-grade temperatures from –55°C to +125°C.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2 | - | 36 | V |
| Differential Input Voltage (VID) | - | - | ±36 | V |
| Input Offset Voltage (VIO) | 1 | 2 | 4 | mV |
| Input Bias Current (IIN) | - | 25 | - | nA |
| Supply Current (ICC) | - | 0.8 | - | mA |
| Junction Temperature (TJ) | -55 | - | 125 | °C |
Key Features
- Wide supply voltage range: 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: Typical 0.8 mA.
- Low input bias current: Typical 25 nA.
- Low input offset voltage: Typical 2 mV.
- Common-mode input voltage range includes ground.
- Differential input voltage range equal to maximum-rated supply voltage.
- Output compatible with TTL, MOS, and CMOS.
- Open-collector output allowing for wired-AND relationships.
Applications
- Industrial applications.
- Automotive applications:
- Infotainment and clusters.
- Body control modules).
- Power supervision).
- Oscillators).
- Peak detectors).
- Logic voltage translation).
Q & A
- What is the LM139AJ/PB?
The LM139AJ/PB is a quad differential comparator from Texas Instruments, part of the LM139A series, designed for wide supply voltage ranges and low input bias current.
- What are the key differences between LM139AJ/PB and LM139J/PB?
The main difference is in the offset voltage specifications. The LM139AJ/PB has a lower offset voltage compared to the LM139J/PB.
- What are the supply voltage ranges for the LM139AJ/PB?
The device can operate from a single supply of 2 V to 36 V or dual supplies from ±1 V to ±18 V).
- What is the typical input bias current of the LM139AJ/PB?
The typical input bias current is 25 nA).
- Can the LM139AJ/PB replace the M38510/11201BCA?
Yes, the LM139AJ/PB can replace the M38510/11201BCA in most applications, although the M38510/11201BCA is a MIL-883 grade device).
- What are the common applications of the LM139AJ/PB?
Common applications include industrial, automotive (infotainment and body control modules), power supervision, oscillators, peak detectors, and logic voltage translation).
- What is the junction temperature range for the LM139AJ/PB?
The device is characterized for operation over the full military temperature range of –55°C to +125°C).
- How does the output of the LM139AJ/PB work?
The output is an open-collector NPN transistor, allowing for wired-AND relationships and compatibility with TTL, MOS, and CMOS logic).
- What is the significance of the 'PB' in LM139AJ/PB?
The 'PB' indicates the lead plating type, specifically a solder dip plating used by National Semiconductor).
- What are the recommended layout guidelines for using the LM139AJ/PB?
Recommendations include using a bypass capacitor on the supply pin to reject supply voltage variations and maintaining a stable power supply with minimized noise and glitches).
