THS4531A - Ultra Low Power, RRO, Fully-Differential Amplifier

The THS4531A device is a low-power, fully differential amplifier with input common-mode range below the negative rail and rail-to-rail output. The device is designed for low-power data acquisition systems and high-density applications where power consumption and dissipation is critical.

The device features accurate output common-mode control that allows for DC coupling when driving analog-to-digital converters (ADCs). This control, coupled with the input common-mode range below the negative rail and rail-to-rail output, allows for easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs), and delta-sigma (ΔΣ) ADCs using only single-supply 2.5-V to 5-V power. The THS4531A is also a valuable tool for general-purpose, low-power differential signal conditioning applications.

• Ultra Low-Power:
  • Voltage: 2.5 V to 5.5 V
  • Current: 250 µA
  • Power-Down Mode: 0.5 µA (Typical)
• Fully Differential Architecture
• Bandwidth: 36 MHz (Av = 1 V/V)
• Slew Rate: 200 V/µs
• THD: –120 dBc at 1 kHz (1 V_RMS, R_L= 2 kΩ)
• Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)
• High DC Accuracy:
  • V_OS: ±100 µV
  • V_OS Drift: ±3 µV/°C (–40°C to +125°C)
  • A_OL: 114 dB
• Rail-to-Rail Output (RRO)
• Negative Rail Input (NRI)
• Output Common-Mode Control
• 8-Pin SOIC (D) and VSSOP (DGK)
• 10-Pin WQFN (RUN)