Overview
The LM139ADR, produced by Texas Instruments, is a quad differential comparator integrated circuit. This device is designed to operate from a single power supply over a wide range of voltages, from 2 V to 36 V, and can also operate with dual supplies. The LM139ADR is characterized for operation over the full military temperature range of –55°C to +125°C, making it highly versatile and reliable in various applications.
The comparator consists of four independent voltage comparators, each capable of comparing the differential voltage between the positive and negative input pins and outputting a logic low or high impedance based on the input differential polarity. The device features low input bias current, low input offset voltage, and low supply-current drain, which are independent of the supply voltage.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage (VS) | 2 | 36 | V |
| Differential Input Voltage (VID) | ±38 | ±38 | V |
| Input Bias Current (typ / max) | 25 nA / 250 nA | nA | |
| Input Offset Voltage (typ / max) | 2 mV / 5.5 mV | mV | |
| Response Time (typ) | 1 | µsec | |
| Output Saturation Voltage | Low | V | |
| Output Compatibility | TTL, MOS, CMOS | ||
| Junction Temperature (TJ) | –55 | 125 | °C |
| Storage Temperature (Tstg) | –65 | 150 | °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, typically 0.8 mA.
- Low input bias current: Typically 25 nA.
- Low input offset voltage: Typically 2 mV.
- 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.
- Open-collector output allows for wired-AND relationships.
Applications
- Industrial applications.
- Automotive: Infotainment and clusters, body control modules.
- Power supervision.
- Oscillators.
- Peak detectors.
- Logic voltage translation.
Q & A
- What is the supply voltage range for the LM139ADR?
The LM139ADR can operate from a single supply voltage of 2 V to 36 V and with dual supplies from ±1 V to ±18 V.
- What is the typical input bias current of the LM139ADR?
The typical input bias current is 25 nA).
- What is the typical input offset voltage of the LM139ADR?
The typical input offset voltage is 2 mV).
- What is the response time of the LM139ADR?
The typical response time is 1 µsec).
- Is the output of the LM139ADR compatible with other logic families?
Yes, the output is compatible with TTL, MOS, and CMOS logic families).
- What is the junction temperature range for the LM139ADR?
The junction temperature range is from –55°C to 125°C).
- Can the LM139ADR be used in wired-AND configurations?
Yes, the open-collector output allows for wired-AND relationships).
- What are some common applications of the LM139ADR?
Common applications include industrial, automotive, power supervision, oscillators, peak detectors, and logic voltage translation).
- What is the common-mode input voltage range for the LM139ADR?
The common-mode input voltage range includes ground and extends up to VCC – 1.5 V).
- What is the differential input voltage range for the LM139ADR?
The differential input voltage range is equal to the maximum-rated supply voltage, ±36 V).
