Texas Instruments Introduces PGA281 Programmable Gain Amplifier

Texas Instruments (TI) PGA281 programmable gain amplifier (PGA)

Texas Instruments announced their PGA281 programmable gain amplifier. The TI PGA281 is a fully differential, zero-drift, 36-V PGA. The PGA281 is available now in a 5mm by 6.4mm, 16-pin TSSOP package, specified over a temperature range of -40 C to +105 C. The device has a suggested retail price of $2.55 in 1,000-unit quantities.

Texas Instruments PGA281 PGA Features

  • Wide Input Range: ±15.5 V at ±18 V Supply
  • Binary Gain Steps: 128 V/V to 1/8 V/V
  • Additional Scaling Factor: 1 V/V and 1 3/8 V/V
  • Low Offset Voltage: 5 µV at G = 128
  • Near-Zero Long-Term Drift of Offset Voltage
  • Near-Zero Gain Drift: 0.5 ppm/°C
  • Excellent Linearity: 1.5 ppm
  • Excellent CMRR: 140 dB
  • High Input Impedance
  • Very Low 1/f Noise
  • Differential Signal Output
  • Overload Detection
  • TSSOP-16 Package

At 5uV, the PGA281 offers the lowest offset voltage in its class to improve accuracy and long-term stability. Its zero-drift architecture enables DC precision and long-term stability. It also reduces the need for future system calibration. Designers can use the PGA281 in industrial signal acquisition applications, including test and measurement, strain gauges, bridge amplifiers, and medical instrumentation.

The PGA281 is included in a new TI Precision Designs reference design; 10uA-100mA, 0.05% Error, High-Side Current Sensing; that uses flexible gain configurations to achieve precise current sensing across four decades. The TI Precision Designs reference design library provides comprehensive board-level precision designs to help engineers quickly evaluate and customize their systems.

The PGA281EVM evaluation module (EVM) is available to help designers quickly and easily evaluate the functionality and versatility of the device. A SPICE model is also available for designing, testing and troubleshooting a broad variety of basic and advanced circuits, including complex architectures, without any node or number of device limitations.

More info: TI PGA281 Zero-Drift, High Voltage Programmable Gain Amplifier (pdf)