OPA4340AIM/TR

The OPAx340A series single-channel, dual-channel, and quad-channel op amps represent a new generation of precision, low-power op amps. This series features rail-to-rail input and output (RRIO) swing, low quiescent current (720 μA typical), combined with wide bandwidth (9 MHz) and ultra-low noise (12 nV/√Hz at 1 kHz), making it 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 these amplifiers for use in applications with megaohm-level source impedances. The robust design of the OPAx340A amplifiers 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 OPAx340A amplifiers are optimized to operate at voltages as low as +2.0 V (±1.0 V) and up to +5.5 V (±2.75 V) over an extended temperature range of -40°C to +125°C. The OPAx340A series single-channel, dual-channel, and quad-channel op amps are designed for portable applications as low-power, rail-to-rail input and output op amps. These devices operate from 1.8 V to 5.5 V over a temperature range of 0°C to 70°C, are unity-gain stable, and are suitable for a wide range of general-purpose applications. The class AB output stage is capable of driving ≤10 kΩ loads connected at any point between VS+ and ground. The input common-mode voltage range includes both rails, making the OPAx340A series suitable for virtually any single-supply application. Rail-to-rail input and output swing significantly increases dynamic range, especially in low-supply applications, making it ideal for driving sampling ADCs. The OPAx340A offers 9 MHz bandwidth and 9 V/μs slew rate while consuming only 720 μA supply current per amplifier, delivering good AC performance at extremely low power. It also performs well in DC applications, with input noise voltage as low as 12 nV/√Hz at 1 kHz, low input bias current, and a maximum input offset voltage of 0.8 mV. Typical offset voltage drift is 1 μV/°C, and the input offset voltage varies by only 100 μV (from 0.8 mV to 0.9 mV) over the entire temperature range. The OPAx340A series is optimized to operate over a temperature range of 0°C to 70°C at voltages as low as +1.8 V (±0.9 V) and up to +5.5 V (±2.75 V), with full specifications and guarantees at voltages from 2.0 V to 5.5 V (±1.0 V to ±2.75 V). In addition, many specifications apply over the -40°C to +125°C temperature range.

Applications

• Battery-powered instruments: consumer, industrial, medical, notebook
• 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 time: 0.3 μs to 0.1% error
• 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