RHA Electrophysiology Amplifier Chips
Introduced in 2010, RHA2000 amplifier chips are low-power microchips that contain 16 or 32 low-noise amplifiers for electrophysiology monitoring and recording applications. RHA2000 series chips are available in standard QFN surface-mount packages for solder assembly on printed circuit boards, and are also available in bare die form for advanced chip-on-board assembly.
The RHA2000 chips have multiplexed analog outputs, so an external ADC must be added. Our newer RHD2000 amplifier chips, introduced in 2012, incorporate an on-chip ADC as well as additional functionality and are recommended for new designs.
RHA2000 Family
- RHA2116 16-channel amplifier chip with unipolar inputs and common reference
- RHA2216 16-channel amplifier chip with bipolar (differential) inputs
- RHA2132 32-channel amplifier chip with unipolar inputs and common reference
Features
- Fully integrated electrophysiology amplifiers; no off-chip filter capacitors required
- On-chip analog multiplexer allows many amplifiers to share one external ADC
- Low noise floor: 2 μV rms typical
- Upper cutoff frequency set by external resistor; configurable from 10 Hz to 20 kHz
- Lower cutoff frequency set by external resistor; configurable from 0.02 Hz to 1000 Hz
- In situ electrode impedance measurement capability with additional external components
Applications
- Miniaturized multi-channel headstages for neural recording
- Low-power wireless headstages or backpacks for electrophysiology experiments
- "Smart Petri dish" in vitro recording systems
- Simultaneous recording of action potentials and local field potentials (LFPs) from microelectrodes
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RHA2000 series 16- and 32-channel amplifier chips in standard QFN packages. |
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