THS4509-Q1 - Automotive Catalog Wideband Operational Amplifier

The THS4509-Q1 is a wideband, fully differential operational amplifier designed for 5-V data-acquisition systems. It has very low noise at 1.9 nV/√Hz, and extremely low harmonic distortion of –75-dBc HD₂ and –80-dBc HD₃ at 100 MHz with 2 Vpp, G = 10 dB, and 1-kΩ load. Slew rate is very high at 6600 V/µs and with settling time of 2 ns to 1% (2-V step), it is ideal for pulsed applications. It is designed for minimum gain of 6 dB but is optimized for gain of 10 dB.

To allow for dc coupling to analog-to-digital converters (ADCs), its unique output common-mode control circuit maintains the output common-mode voltage within 3-mV offset (typical) from the set voltage, when set within 0.5 V of mid-supply, with less than 4-mV differential offset voltage. The common-mode set point is set to mid-supply by internal circuitry, which may be overdriven from an external source.

The input and output are optimized for best performance with their common-mode voltages set to mid-supply. Along with high-performance at low power-supply voltage, this makes for extremely high-performance single-supply 5-V data-acquisition systems.

The THS4509-Q1 is offered in a quad 16-pin leadless QFN package (RGT) and is characterized for operation over the full automotive temperature range from –40°C to 125°C.

• Qualified for Automotive Applications
• Fully Differential Architecture
• Centered Input Common-Mode Range
• Minimum Gain of 2 V/V (6 dB)
• Bandwidth: 1900 MHz
• Slew Rate: 6600 V/µs
• 1% Settling Time: 2 ns
• HD₂: –75 dBc at 100 MHz
• HD₃: –80 dBc at 100 MHz
• OIP₂: 73 dBm at 70 MHz
• OIP₃: 37 dBm at 70 MHz
• Input Voltage Noise: 1.9 nV/√Hz (f > 10 MHz)
• Noise Figure: 17.1 dB
• Output Common-Mode Control
• Power Supply:
  • Voltage: 3 V (±1.5 V) to 5 V (±2.5 V)
  • Current: 37.7 mA
• Power-Down Capability: 0.65 mA