HGSEMI HGV8634MT/TR

This series of devices features a 6MHz gain-bandwidth product, a 4.2V/μs slew rate, and a quiescent current of 470μA per amplifier at a 5V supply. Designed to deliver performance in low-voltage and low-noise systems, these devices can drive heavy loads while achieving rail-to-rail output swing. The input common-mode voltage range includes ground, and the maximum input offset voltage is 3.5mV. The operating temperature range covers extended industrial grade (-40°C ~ +125°C), with an operating voltage range of 2.1V ~ 5.5V. The op-amps in this series are unity-gain stable, making them suitable for a wide range of general-purpose applications. Their compact packages help conserve PCB space, enabling smaller electronic product designs. This series operates from a single supply of 2.1V ~ 5.5V or dual supplies of ±1.05V ~ ±2.75V. For optimal performance, a 0.1μF ceramic capacitor should be placed close to the VDD pin during single-supply operation; for dual-supply operation, the VDD and VSS supplies should each be bypassed to ground with separate 0.1μF ceramic capacitors. The low quiescent current helps maximize battery life, making these devices ideal for battery-powered systems. Most characteristics remain consistent across the entire operating voltage range, ensuring reliable operation throughout the full life cycle of a single-cell lithium-ion battery. The input common-mode range is achieved using a complementary input stage and can extend beyond the supply rails by 100mV (VSS-0.1V to VDD+0.1V). During normal operation, inputs should be kept within this range. Rail-to-rail output swing is especially important at low supply voltages, providing maximum output dynamic range. With light resistive loads (>100kΩ), the output voltage can typically swing to within 2mV of either supply rail; with moderate resistive loads (10kΩ), it can swing to within 60mV of the supply rails. This series is optimized for bandwidth and speed rather than driving capacitive loads. Output capacitance introduces a pole in the amplifier's feedback path, leading to overshoot and potential oscillation. For applications requiring capacitive load drive, two strategies may be considered: one is to insert a small series resistor between the amplifier output and the load capacitance; the other is to reduce the bandwidth of the amplifier's feedback loop by increasing the overall noise gain. The series resistor approach isolates the output from the capacitance and creates a zero in the feedback path to compensate for the pole introduced by the output capacitance. The larger the isolation resistor value, the more stable the output voltage will be.

• Single-supply operating voltage range: +2.1V ~ +5.5V
• Rail-to-rail input/output
• Gain bandwidth product: 6MHz (typical)
• Low input bias current: 1pA (typical)
• Low offset voltage: 3.5mV (maximum)
• Quiescent current: 470μA per amplifier (typical)
• Operating temperature range: -40°C ~ +125°C
• Small package options: HGV8631 available in SOT23-5, SC70-5, and SOP-8; HGV8632 available in SOP-8 and MSOP-8; HGV8634 available in SOP-14 and TSSOP-14

• Sensors
• Active filters
• Mobile phones
• Laptops & PDAs
• Audio equipment