THS4531/31A Fully-Differential Op Amps

By Texas Instruments 85

THS4531/31A Fully-Differential Op Amps

Texas Instruments' THS4531/31A are low-power, fully-differential op amps with an input common-mode range below the negative rail and rail-to-rail output. The devices is designed for low-power data acquisition systems and high density applications where power consumption and dissipation is critical.

The devices feature 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.

  • Ultra low power:
    • Voltage: 2.5 V to 5.5 V
    • Current: 250 µA
    • Power-down mode: 0.5 µA (typ)
  • Fully-differential architecture
  • Bandwidth: 36 MHz
  • Slew rate: 200 V/µs
  • THD: -120 dBc at 1 kHz (1 VRMS, RL= 2 kΩ)
  • Low-power SAR, ΔΣ ADC driver
  • Low power, high performance:
    • Differential to differential amplifier
    • Single-ended to differential amplifier
  • Low-power, wide-bandwidth differential driver
  • Low-power, wide-bandwidth differential signal conditioning
  • High channel count and power dense systems