OPA333

Device Description

The OPA333 series of CMOS operational amplifiers uses a proprietary auto-calibrationtechnique to simultaneously provide very low offset voltage (10μV max) and near-zero drift over time and temperature. These miniature, high-precision, low quiescent current amplifiers offer high-impedance inputs that have a common-mode range 100mV beyond the rails and rail-to-rail output that swings within 50mV of the rails. Single or dual supplies as low as +1.8V (±0.9V) and up to +5.5V(±2.75V) may be used. They are optimized for low-voltage, single-supply operation.

The OPA333 family offers excellent CMRR without the crossover associated with traditional complementary input stages. This design results in superior performance for driving analog-to-digital converters (ADCs) without degradation of differential linearity.
The OPA333 op amps use an auto-calibration technique with a time-continuous 350kHz op amp in the signal path. This amplifier is zero-corrected every 8μs using a proprietarytechnique. Upon powerup, the amplifier requires approximately 100μs to achieve specifiedVOS accuracy. This design has no aliasing or flicker noise.

Chip Features

  • LOW OFFSET VOLTAGE: 10μV (max)
  • ZERO DRIFT: 0.05μV/°C (max)
  • 0.01Hz to 10Hz NOISE: 1.1μVPP
    QUIESCENT CURRENT: 17μA
  • SINGLE-SUPPLY OPERATION
    SUPPLY VOLTAGE: 1.8V to 5.5V
    RAIL-TO-RAIL INPUT/OUTPUT
  • micro-SIZE PACKAGES: SC70 and SOT23 
Die Photo & Workscope
Part NumberOPA333
ManufactureTI
Process Technology0.35 Generic CMOS
Die Size

0.752mm*0.991mm