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).
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.
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| 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
