AD8279 Series

Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2

Catalog

Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2

Part	Voltage - Supply Span (Min) [Min]	-3db Bandwidth	Amplifier Type	Mounting Type	Voltage - Supply Span (Max) [Max]	Package / Case [x]	Package / Case [y]	Package / Case	Voltage - Input Offset	Current - Output / Channel	Slew Rate	Operating Temperature [Max]	Operating Temperature [Min]	Number of Circuits	Utilized IC / Part	Board Type	Channels per IC	Output Type	Supplied Contents	Voltage - Supply, Single/Dual (±) [Max]	Voltage - Supply, Single/Dual (±) [Max]	Voltage - Supply, Single/Dual (±) [Min]	Voltage - Supply, Single/Dual (±)	Current - Supply (Main IC)
Analog Devices AD8279ARZ-RL	2 V	1 MHz	Differential	Surface Mount	36 V	0.154 in	3.9 mm	14-SOIC	50 µV	15 mA	1.4 V/µs	85 °C	-40 °C	2
Analog Devices AD8279-EVALZ		1 MHz	Difference							15 mA	1.4 V/µs				AD8279	Fully Populated	2 - Dual	Rail-to-Rail Single-Ended	Board(s)	36 V	18 V	2 V	2 V	300 µA
Analog Devices AD8279BRZ	2 V	1 MHz	Differential	Surface Mount	36 V	0.154 in	3.9 mm	14-SOIC	50 µV	15 mA	1.4 V/µs	85 °C	-40 °C	2

Catalog

Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2

Key Features

• Wide input range beyond supplies

• Rugged input overvoltage protection

• Low supply current: 200 μA maximum (per amplifier)

• Low power dissipation:

• 0.5 mW at VS = 2.5 V

• Bandwidth: 1 MHz (G = ½)

• CMRR: 80 dB minimum,dc to 20 kHz (G = ½, B Grade)

• Low offset voltage drift: ±1 μV/°C maximum (B Grade)

• Low gain drift: 1 ppm/°C maximum (B Grade)

• Enhanced slew rate: 1.4 V/μs

• Wide power supply rangeSingle supply: 2 V to 36 VDual supplies: ±2 V to ±18 V

• 8-lead SOIC, 14-lead SOIC, and MSOP packages

Description

The AD8278 and AD8279 are general-purpose difference amplifiers intended for precision signal conditioning in power critical applications that require both high performance and low power. The AD8278 and AD8279 provide exceptional common-mode rejection ratio (80 dB) and high bandwidth while amplifying input signals that are well beyond the supply rails. 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 amplifier extends to almost triple the supply voltage (for G = ½), making the amplifer ideal for single-supply 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 amp.The AD8278 and AD8279 can be used as difference amplifiers with G = ½ or G = 2. They can also be connected in a high precision, single-ended configuration for non inverting and inverting gains of −½, −2, +3, +2, +1½, +1, or +½. The AD8278 and AD8279 provide an integrated precision solution that has a smaller size, lower cost, and better performance than a discrete alternative.The AD8278 and AD8279 operate on single supplies (2.0 V to 36 V) or dual supplies (±2 V to ±18 V). The maximum quiescent supply current is 200 μA, which is ideal for battery-operated and portable systems. For unity-gain difference amplifiers with similar performance, refer to theAD8276andAD8277data sheets.The AD8278 is available in the space-saving 8-lead MSOP and SOIC packages, and the AD8279 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 RoHS compliant.ApplicationsVoltage measurement and monitoringCurrent measurement and monitoringInstrumentation amplifier building blockPortable, battery-powered equipmentTest and measurement