THS4521-HT - High Temperature, Very Low Power, Negative Rail Input, Rail-to-Rail Output, Differential Amp

The THS4521 is a very low-power, fully differential op amp with rail-to-rail output and an input common-mode range that includes the negative rail. This amplifier is designed for low-power data acquisition systems and high-density applications where power dissipation is a critical parameter, and provides exceptional performance in audio applications.

The THS4521 features accurate output common-mode control that allows for dc-coupling when driving analog-to-digital converters (ADCs). This control, coupled with an input common-mode range below the negative rail as well as rail-to-rail output, allows for easy interfacing between single-ended, ground-referenced signal sources. Additionally, this device is ideally suited for driving both successive-approximation register (SAR) and delta-sigma (ΔΣ) ADCs using only a single 2.5-V to 3.3-V and ground power supply.

The THS4521 is characterized for operation from –55°C to 210°C.

• Fully Differential Architecture
• Bandwidth: 40.7 MHz (210°C)
• Slew Rate: 353.5 V/µs (210°C)
• HD₂: –96 dBc at 1 kHz
  (1 V_RMS, R_L = 1 kΩ) (210°C)
• HD₃: –91.5 dBc at 1 kHz
  (1 V_RMS, R_L = 1 kΩ) (210°C)
• Input Voltage Noise: 19.95 nV/√Hz (f = 100 kHz)
• Open-Loop Gain: 90 dB (typ) (210°C)
• NRI—Negative Rail Input
• RRO—Rail-to-Rail Output
• Output Common-Mode Control (with Low Offset and Drift)
• Power Supply:
  • Voltage: 2.5 V (±1.25 V) to 3.3 V (±1.65 V)
  • Current: 1.4 mA/ch (3.3 V)
• Power-Down Capability: 10 µA (typ) (210°C)