Texas Instruments Announces New Precision Bipolar Op Amp Featuring Super Beta Inputs

Texas Instruments OPA2205

Texas Instruments has developed the OPA2205 operational amplifier, designed to replace the industry-standard OPA2277 chip. The OPA2205 is the next generation, precision, bipolar, e-trim™ operational amplifier featuring super beta inputs. Through the combination of a bipolar amplifier core and a digital trim, the OPA2205 achieves very low offset (±25 μV, max), offset drift (±0.3 μV/°C, max) and noise (7.2 nV/√Hz, typ).

Texas Instruments - OPA2205

The high dc and ac performance of the amplifier, along with a 3.6-MHz bandwidth and low-power consumption (250 μA, max), make the OPA2205 an excellent choice for systems that require high precision and low power consumption, such as high-density data-acquisition systems (DAQ), source measurement units (SMU), and string inverters. The integrated EMI/RFI filter reduces system errors by eliminating unwanted RF-injected signals from neighboring circuits and other electronic systems. The OPA2205 amplifier is available in a standard-pinout, VSSOP package (3.00 mm × 3.00 mm), and operates across the extended industrial ambient temperature range of –40 °C to +125 °C.

The OPA2205 Functional Block Diagram
The OPA2205 Functional Block Diagram.

Features

  • e-trim operational amplifier performance
  • Low offset voltage: 25 μV (max)
  • Low offset voltage drift: ±0.3 μV/°C (max)
  • Super beta inputs
    • Input bias current: 0.75 nA (max)
    • Input current noise: 200 fA/√Hz
  • Low noise
    • 0.1 to 10-Hz: 0.15 μVPP
    • Voltage noise: 7.2 nV/√Hz
  • AOL, CMRR, and PSRR: > 120 dB (full temperature range)
  • Gain bandwidth product: 3.6 MHz
  • Low quiescent current: 250 μA (max)
  • Slew rate: 4 V/μs
  • Overload power limiter
  • Rail-to-rail output
  • EMI/RFI filtered inputs
  • Wide supply: 4.5 V to 36 V
  • Temperature range: –40 °C to +125 °C

Applications

  • Flow transmitter
  • String inverter
  • Data acquisition (DAQ)
  • Source measurement unit (SMU)
  • Lab and field instrumentation
  • Battery test
  • Analog input module

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