The OPA340NA/3K is a single-supply Operational Amplifier optimized for low-voltage. High-speed operation make them ideal for driving sampling analogue-to-digital (A/D) converters. They are also well-suited for general purpose and audio applications as well as providing I/V conversion at the output of digital-to-analogue (D/A) converters. Single version have identical specifications for design flexibility. The OPA340 series operate on a single supply as low as 2.5V with an input common-mode voltage range that extends 500mV below ground and 500mV above the positive supply. Output voltage swing is to within 1mV of the supply rails with a 100k load.

• Rail-to-rail input/output
• 750µA/channel Low quiescent current
• Green product and no Sb/Br

The LM124DRG4 is a 4 independent high-gain frequency-compensated Operational Amplifier designed specifically to operate from a single supply or split supply over a wide range of voltages.

• Internal frequency compensation
• Common-mode input voltage range includes ground, allowing direct sensing near ground
• Low input bias and offset parameters
• 2kV ESD Protection
• 0.8mA Typical low supply-current drain independent of supply voltage
• 3mV Typical input offset voltage
• 2nA Typical input offset current
• 20nA Typical input bias current
• 32V Differential input voltage range equal to maximum-rated supply voltage
• 100V/mV Typical open-loop differential voltage amplification

The AD8244BRMZ is a low power FET input quad Unity-gain Buffer designed to isolate very large source impedances from the rest of the signal chain. The 2pA maximum bias current, near zero current noise and 10 TΩ input impedance introduce almost no error, even with source impedance well into the megaohms. Many traditional operational amplifier pinouts have a supply pin that is next to the non-inverting input. A guard trace must be routed between these pins to avoid leakage currents much larger than the bias current of a FET input op amp. The AD8244 solves this problem with unique pinout that physically separates the high impedance inputs from the low impedance supplies and outputs of the other buffers. The AD8244 design is focused on solving problems specific to buffers. This includes close channel-to-channel matching which allows channels of the AD8244 to be used in differential signal chains with minimal error.

• Extremely high input impedance
• Low noise
• High DC precision – 3μV/°C maximum offset drift (B grade)
• No leakage from inputs to supply pins
• Provides guarding capability
• Rail-to-rail output
• Single-supply operation – Input range extends to ground
• 250μA Maximum supply current per amplifier
• 2pA Maximum input bias current at 25°C