Aigtek's ATA-100 series covers the entry point of laboratory power amplification: DC-coupled amplification up to 5MHz bandwidth, with adjustable input and output resistance to match a wide range of signal sources and loads without the signal loss a fixed-impedance amplifier introduces.
What Makes a General-Purpose Lab Amplifier Different
Many bench amplifiers are optimised for one specific job — RF power, high voltage, or high current. The ATA-100 series is deliberately general-purpose: adjustable 50Ω or 1MΩ input resistance lets it match either a 50Ω signal generator output or a high-impedance sensor directly, and adjustable 0.5Ω or 50Ω output resistance lets it drive either a low-impedance actuator or a matched 50Ω transmission line without an external matching network.
The Two Models
| Model | Bandwidth | Max Voltage | Max Current |
|---|---|---|---|
| ATA-101B | DC~1MHz | 25Vp-p (±12.5Vp) | 2Ap |
| ATA-105B | DC~5MHz | 25Vp-p (±12.5Vp) | 2Ap |
Both share the same output voltage and current rating; the choice between them is purely about how much bandwidth your application actually needs. Specifying the lower-bandwidth ATA-101B when 1MHz is sufficient avoids paying for bandwidth headroom that goes unused.
Where This Fits in University and General R&D Labs
Low-voltage, moderate-current signal amplification is a recurring need across electronic experimental teaching labs, sensor characterisation, and general circuit prototyping — anywhere a signal generator's raw output isn't sufficient to drive the load directly. The ATA-100 series is sized for exactly this role rather than for high-power industrial driving.
Finch Electronic Solutions — Melbourne, Australia
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