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High-speed (40-MHz), high-precision (25-µV) , low-noise op amp with integrated gain switches

US ECCN: EAR99 US/Local Export Classification Number

Inventory: 229  
Limit:  50

Quality information

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
VQFN (RGR) | 20 3,000 | LARGE T&R
-40 to 85
Package | Pins VQFN (RGR) | 20
Package qty | Carrier: 3,000 | LARGE T&R
Operating temperature range (°C) -40 to 85
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Features for the OPA3S328

  • Precision operational amplifier with integrated switches:
    • Wide bandwidth: 40 MHz
    • Low offset voltage: 25 µV (max)
    • Very low offset drift: 1.5µV/°C (max)
    • Low input bias current: 0.2 pA
    • Low voltage noise: 5.7 nV/√Hz at 10 kHz
    • Low curent noise: 0.2 pA/√Hz at 10 kHz
  • Rail-to-rail input and output
  • Zero-crossover input stage
  • Slew rate: 25 V/µs
  • Quiescent current: 3.8 mA per channel
  • Current in shutdown mode: 50 µA
  • Output impedance in shutdown mode: 1 GΩ
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Unity-gain stable
  • Small packages:
    • 20-lead, 3.5-mm x 3.5-mm VQFN
    • 2.0-mm x 2.0-mm DSBGA

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Description for the OPA3S328

The OPA3S328 is a precision, low-voltage, CMOS operational amplifier (op amp) with integrated switches that are optimized for flexible transimpedance applications. Low input bias current and low input capacitance allows for high-frequency transimpedance gains at low photocurrent operation (< 1 nA). Integrated switches, low offset, and rail-to-rail output performance of the OPA3S328 allows for high accuracy across multiple decades of current values. Small packages, along with integrated switches, allow for selectable transimpedance gains and help reduce size for space-constrained applications.

The OPA3S328 operates on supplies ranging from 2.2 V to 5.5 V, and consumes a relatively low power of 3.8 mA/channel. The device provides enable-disable capability to allow for portable, hand-held applications in test and measurement. When disabled, the OPA3S328 output impedance is typically 1 GΩ, allowing for wired-OR applications using multiple transimpedance channels.


Qty Price (USD)
1-99 4.6
100-249 3.75
250-999 2.948
1,000+ 2.5