STMicroelectronics LM239DT Quadruple Differential Comparators
The LM239DT from STMicroelectronics is a precision quadruple differential comparator designed to cater to a wide array of applications that require voltage monitoring and control. This device is part of the LMx39x series of comparators that are known for their reliability and versatility.
Each LM239DT chip contains four independent comparators that are capable of comparing two input voltages. The device operates over a single or dual supply voltage range, which can be as wide as 2V to 36V when using a single supply, or ±1V to ±18V in dual supply mode. This flexibility makes the LM239DT suitable for use in various electronic circuits including control systems, voltage level detection, and battery chargers.
The comparators in the LM239DT feature a typical input offset voltage of 2 mV and an input offset current of ±5 nA. These low offset values ensure high accuracy in applications where precision is crucial. Additionally, the device boasts a low supply current, which is typically 1.2 mA, contributing to energy efficiency in battery-powered devices.
STMicroelectronics has packaged the LM239DT in a SO-14 package, which is small enough for use in space-constrained applications while still providing ease of handling and integration into PCB designs. The operating temperature range of -55°C to +125°C ensures that the comparators can function reliably in extreme environmental conditions.
Key features of the LM239DT include:
- Wide single supply voltage range or dual supplies for all devices: +2V to +36V or ±1V to ±18V
- Very low supply current (1.2 mA) independent of supply voltage
- Low input biasing current: 25 nA
- Low input offset current: ±5 nA
- Low input offset voltage: 2 mV
- Input common-mode voltage range includes ground
- Low output saturation voltage: 250 mV at 4 mA
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
Overall, the LM239DT is a robust and reliable choice for designers looking to implement multiple comparison functions within their electronic circuits without compromising on performance or power consumption.
