High-Speed Difference Amplifiers Won’t Waste Space

Three low-power difference amplifiers are available that are as small as 4.9 mm x 3 mm; these amplifiers feature slew rates up to 10 times faster than competing products, it’s claimed. Designed for high-performance, power-critical applications, the AD8276, AD8277 and AD8278 difference amplifiers are half the size of competing devices and much smaller than discrete alternatives consisting of resistor arrays and operational amplifiers. The amplifiers also eliminate the added expense and design overhead associated with complex peripheral protection circuitry. The slew rate of 1.1 V/µs combined with an input range of two times the power supply make the AD827x products well suited for robust voltage and current sensing in process-control, motor-control, and power-management applications. The amplifiers combine the benefits of a wide supply range of 2.5 V to 36 V and low power with a 550-kHz bandwidth that is two times faster than other low-power difference amplifiers. They also feature a maximum quiescent current of 220 µA, an 86-dB common-mode rejection ratio, and 15-µS settling time to 0.01%. Pricing starts at $0.95 each in lots of 1000 for the single-channel AD8276 in eight-lead SOIC and MSOP packages. ANALOG DEVICES INC., Norwood, MA. (781) 329-4700.