The LM124J is a low power quad Operational Amplifier designed to operate from a single power supply over a wide range of voltages. Operation from split-power supplies is also possible and the low-power supply current drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems. For example, the LM124 series can directly operate off of the standard 5V power supply voltage which is used in digital systems and easily provides the required interface electronics without requiring the additional ±15V power supplies.

• Internally frequency compensated for unity gain
• 45nA Low input biasing current
• 2mV Low input offset voltage
• 5nA Offsets current
• Input common-mode voltage range includes ground
• Differential input voltage range equal to the power supply voltage
• Military rated

The AD8021ARZ is a Low Noise High Speed Voltage Feedback Amplifier that can be used in 16-bit resolution systems. It is designed to have both low voltage and low current noise (2.1nV/√Hz typical and 2.1pA/√Hz typical) while operating at the lowest quiescent supply current (7mA at ±5V) among today’s high speed, low noise op amps. An output disable pin allows further reduction of the quiescent supply current to 1.3mA. The AD8021 allows the user to choose the gain bandwidth product that best suits the application. It is also capable of driving a 75R line with ±3V video signals. The AD8021 is both technically superior and priced considerably less than comparable amps drawing much higher quiescent current. It is a high speed general-purpose amplifier, ideal for a wide variety of gain configurations and can be used throughout a signal processing chain and in control loops.

• Low noise
• Constant bandwidth from G = -1 to G = -10
• High speed
• 34mW or 6.7mA Typical low power for 5V supply
• Low distortion
• 1mV Maximum input offset voltage
• 0.5µV/°C Input offset voltage drift

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 commonmode 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 commonmode 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.