THS4531AIDR

The THS4531A is a low-power, fully differential operational amplifier with an input common-mode range that extends below the negative supply rail and rail-to-rail output. This device is designed for low-power data acquisition systems and high-density applications where energy consumption and power dissipation are critical. The device features precise output common-mode control, enabling DC coupling when driving analog-to-digital converters (ADCs). Coupled with an input common-mode range that extends below the negative supply rail and rail-to-rail output, this control allows easy connection of single-ended ground-referenced signal sources to successive approximation (SAR) and delta-sigma (ΔΣ) ADCs using only a single 2.5V to 5V supply. The THS4531A is also a useful tool for general-purpose, low-power differential signal conditioning applications. The THS4531A can operate over an extended industrial temperature range from -40°C to +125°C.

Applications

• Low-power SAR and delta-sigma ADC driver
• Low-power, high-performance:
• Differential-to-differential amplifier
• Single-ended-to-differential amplifier
• Low-power, wideband differential driver
• Low-power, wideband differential signal conditioning
• High channel count and power-dense systems

Key features

• Ultra-low power:
• Voltage: 2.5V to 5.5V
• Current: 250μA
• Power-save mode: 0.5μA (typical)
• Fully differential architecture
• Bandwidth: 36MHz
• Slew rate: 200V/μs
• THD: -120dBc at 1kHz (1V RMS, RL = 2kΩ)
• Input voltage noise: 10nV/√Hz (f = 1kHz)
• High DC accuracy:
• Vos: ±100μV
• Vos drift: ±3μV/√°C (-40°C to +125°C)
• AOL: 114dB
• Rail-to-rail output (RRO)
• Negative rail input (NRI)
• Output common-mode control