OPA4345MT/TR-HG

The OPAx345 series single, dual, and quad op amps represent a new generation of precision, low-power op amps. Their rail-to-rail input and output (RRIO) swing, low quiescent current (720 μA typical), combined with wide bandwidth (9 MHz) and ultralow noise (12 nV/√Hz at 1 kHz), make them ideal for a wide range of battery-powered applications requiring a good balance between cost and performance, such as audio output, motor phase current sensing, photodiode amplification, barcode scanners, and white goods. Low input bias current enables use in applications with megaohm-level source impedances. The robust design of the OPAx345 provides ease of use for circuit designers: unity-gain stability with capacitive loads up to 500 pF, integrated RF/EMI rejection filter, no phase reversal under overdrive conditions, and high ESD protection (5 kV HBM). The OPAx345 is optimized for voltages from +2.0 V (±1.0 V) to +5.5 V (±2.75 V) over an extended temperature range of -40°C to +125°C. The OPAx345 (single channel) is available in SOT23-5 and SOP-8 packages. The OPA2345 (dual channel) is available in SOP-8 and MSOP-8 packages. The quad OPA4345 is available in SOP-14 and TSSOP-14 packages.

Applications

• Battery-powered instruments: consumer, industrial, medical, laptop
• Audio output
• Motor phase current sensing
• Photodiode amplification
• Sensor signal conditioning: sensor interface, loop-powered, active filter

Key features

• Low input offset voltage: ±0.8 mV max
• Wide unity-gain bandwidth: 9 MHz
• High slew rate: 9 V/μs
• Fast settling: 0.3 μs to 0.1%
• Low noise: 12 nV/√Hz at 1 kHz
• Single-supply voltage range: 2.0 V to 5.5 V
• Low supply current: 720 μA per amplifier at 5 V supply
• Rail-to-rail input and output
• Internal RF/EMI filter
• Extended temperature range: -40°C to +125°C