AD8276

The AD8276/AD8277 are unity-gain stable. While they are optimized for use as difference amplifiers, they can also be connected in high precision, single-ended configurations with G = -1, +1, +2. The AD8276/AD8277 provide an integrated precision solution that has smaller size, lower cost, and better performance than a discrete alternative. The AD8276/AD8277 operate on single supplies (2.0 V to 36 V)or dual supplies (±2 V to ±18 V). The on-chip resistors are laser-trimmed for excellent gain accuracy and high CMRR. They also have extremely low gain drift vs. temperature. The common-mode range of the amplifiers extends to almost double the supply voltage, making these amplifiers ideal for singlesupply applications that require a high common-mode voltage range. The internal resistors and ESD circuitry at the inputs also provide overvoltage protection to the op amps. The maximum quiescent supply current is 200 A per channel, which is ideal for batteryoperated and portable systems. The AD8276 is available in the space-saving 8-lead MSOP and SOIC packages, and the AD8277 is offered in a 14-lead SOIC package. Both are specified for performance over the industrial temperature range of -40°C to +85°C and are fully RoHcompliant. The AD8276/AD8277 are general-purpose, unity-gain difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. They provide exceptional common-mode rejection ratio (86 dB)and high bandwidth while amplifying signals well beyond the supply rails.

The features of AD8276 can be summarized as (1)wide input range beyond supplies; (2)rugged input overvoltage protection; (3)low supply current: 200 A maximum per channel; (4)low power dissipation: 0.5 mW at VS = 2.5 V; (5)bandwidth: 550 kHz; (6)CMRR: 86 dB minimum, dc to 10 kHz; (7)low offset voltage drift: ±2 V/°C maximum (B Grade); (8)low gain drift: 1 ppm/°C maximum (B Grade); (9)enhanced slew rate: 1.1 V/s; (10)wide power supply range: single supply: 2 V to 36 V/ dual supplies: ±2 V to ±18 V.

The absolute maximum ratings of AD8276 are (1)supply voltage: ±18 V; (2)maximum voltage at any input pin: -VS + 40 V; (3)minimum voltage at any input pin: +VS - 40 V; (4)storage temperature range: -65°C to +150°C; (5)specified temperature range: -40°C to +85°C; (6)package glass transition temperature (TG): 150°C.