ST Microelectronics , a world leader in analogue and mixed signal ICs has introduced an ultra-low-power comparator in a choice of tiny packages.
These devices enable increased performance and functionality in portable products that use power-saving design techniques to maximise battery life.
Applications that will benefit from the features of these comparators include cellphones, mobile internet devices, MP3 players, digital cameras and portable test equipment.
The new device, the TS331 is among ST’s micropower analogue devices and offers typical current consumption of only 20 microamps, thereby minimising drain on the battery.
Additionally, the TS331 comparator can operate from a supply voltage as low as 1.6V, allowing its use in systems designed to operate from low voltages to save overall system power consumption.
The device’s rail-to-rail inputs make the chip capable of accepting voltages up to the supply voltage. This capability allows designers to best use the limited dynamic range imposed by low operating voltages, which can otherwise restrict the performance of portable systems.
Further features of the TS331, which come in packages as small as 2.1 x 2.0 x 1.0mm include an extended operating temperature range from –40°C to +125°C, allowing the device to perform reliably in a wide range of environments and applications including industrial computing equipment and mobile communications infrastructure.
The high maximum temperature also allows use in highly miniaturised products where densely populated boards and small sealed fan-less enclosures can cause operating temperatures to rise quickly.
Major features of the TS331 comparators:
- 20-microamp current consumption
- 1.6V to 5V supply voltage range
- Rail-to-rail inputs
- Propagation delay of 200ns typical
- Open-drain output
- High ESD tolerance: 2kV HBM / 200V MM
- Surface-mount SC70-5 (2.1x2.0x1.0mm) or SOT23-5 (3.1x3.2x3.45mm) package