OPA325 Low-Noise 10 MHz, Zero Crossover Precision CMOS Op-Amp

Texas Instruments' low-power, RRIO op-amp is ideal for applications such as high-Z sensor signal conditioning

Image of Texas Instruments' OPA325 Low-Noise Precision CMOS Op-AmpTexas Instruments' OPA325 is a precision, low-voltage complementary metal-oxide-semiconductor (CMOS) op-amp that is optimized for ultra-low noise and wide bandwidth while operating on a low quiescent current of 650 µA.

The OPA325 features a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of typically 114 dB over the input range. The input common-mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

The zero-crossover distortion, wide bandwidth (10 MHz), high slew rate (5 V/µs), and low noise (9 nV/√Hz) make the OPA325 an ideal successive-approximation register (SAR) analog-to-digital converter (ADC) input driver amp. The OPA325 offers a wide supply voltage range of 2.2 V to 5.5 V with excellent power-supply rejection ratio (PSRR) over the supply range. This makes the op-amp an excellent choice for precision, low-power applications that run directly from batteries without regulation. The OPA325 (single-channel) is available in the SOT23-5 package.

Features
  • Precision with zero crossover:
    • Low offset voltage: 150 µV (max)
    • High CMRR: 114 dB
    • Rail-to-rail I/O
  • Wide bandwidth: 10 MHz
  • Quiescent current: 650 µA per channel
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Low input bias current: 0.2 pA
  • Low noise: 9 nV/√Hz at 10 kHz
  • Slew rate: 5 V/µs
  • Unity-gain stable
Applications
  • High-Z sensor signal conditioning
  • Transimpedance amps
  • Test and measurement equipment
  • Programmable logic controllers (PLCs)
  • Motor control loops
  • Communications
  • Input, output ADCs, and DAC buffers
  • Active filters

OPA325 Low-Noise Precision CMOS Op-Amp

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC CMOS 1 CIRCUIT SOT23-5OPA325IDBVTIC CMOS 1 CIRCUIT SOT23-50View Details

DIP Adapter EVM

ImageManufacturer Part NumberDescriptionPackagingPart StatusProto Board TypeAvailable QuantityView Details
MODULE EVAL DIP ADAPTERDIP-ADAPTER-EVMMODULE EVAL DIP ADAPTERBoxActiveSMD to Plated Through Hole160 - Immediate
124 - Factory Stock
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Evaluation Boards

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
UNIV EVAL MOD FOR SOP PKGOPAMPEVM-SOICUNIV EVAL MOD FOR SOP PKG24 - Immediate
144 - Factory Stock
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DUAL-DIYAMP-EVMDUAL-DIYAMP-EVMDUAL-DIYAMP-EVM13 - Immediate
175 - Factory Stock
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UNIV EVAL MOD FOR MSOP/TSSOPOPAMPEVM-MSOPTSSOPUNIV EVAL MOD FOR MSOP/TSSOP4 - Immediate
4 - Factory Stock
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UNIV EVAL MOD FOR SOT23 PKGOPAMPEVM-SOT23UNIV EVAL MOD FOR SOT23 PKG13 - Immediate
2195 - Factory Stock
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UNIV EVAL MOD FOR SOT23 PKGOPAMPEVM-SOT23SHDNUNIV EVAL MOD FOR SOT23 PKG17 - Immediate
11 - Factory Stock
View Details
UNIV EVAL MOD FOR DIP PKGOPAMPEVM-PDIPUNIV EVAL MOD FOR DIP PKG26 - Immediate
69 - Factory Stock
View Details
Published: 2019-08-30