Teyleten Robot AD620 Microvolt/Millivolt Amplifier Module

The Teyleten Robot AD620 microvolt/millivolt amplifier module is a compact instrumentation amplifier board that boosts tiny DC and AC signals with adjustable gain from 1.5 up to 1000 for accurate low-level measurement.

This three-piece module set centers on the AD620 instrumentation amplifier to accurately amplify small voltages in the microvolt and millivolt range. Designed for hobbyists, electronics developers, and test engineers, the boards accept a supply between 3–12 VDC, provide an adjustable null for zeroing outputs, and include an onboard negative-voltage generator so the module can produce a bipolar output without a dual supply. At 32 × 22 mm each, these modules are small enough for compact projects yet precise enough for sensitive signal acquisition.

How does the amplifier handle very small signals?

The AD620-based module amplifies inputs from roughly 100 μV up to 300 mV and maintains low offset and low drift for stable readings over time. Its common-mode rejection and low bias current suit bridge sensors and low-level transducers that demand clean amplification.

• Gain adjustable from 1.5 to 1000× via single potentiometer
• Input offset as low as ~50 μV, offset drift ≈ 0.6 μV/°C
• Input bias current around 1 nA (max), minimizing sensor loading
• Common-mode rejection ratio ≈ 100 dB for cleaner results

What power and output range should I expect when using this module?

Supply the board with 3–12 VDC; the amplifier output swings close to the supply rails, with a maximum practical output range near ±(Vin − 2 V). The module also includes a small charge-pump (7660A) to create a negative rail so you can get bipolar outputs from a single supply.

• Operating voltage: 3–12 VDC
• Typical output range: up to ±(Vin − 2 V) depending on load
• Onboard negative voltage generator provides modest negative rail for dual-supply behavior
• Note: negative output under heavy load will be less negative due to output resistance

How easy is it to integrate and tune this module into projects?

The board is designed for quick integration: standard 2.54 mm pitch pins, four 3 mm mounting holes, and a tiny footprint make mounting and wiring straightforward. Two trimmers allow you to set gain and adjust the output zero point to remove offsets or drift for more accurate readings.

• Compact size: 32 × 22 mm with four mounting holes
• 2.54 mm pin header spacing for breadboards and connectors
• Separate gain and null adjustment potentiometers for fast tuning
• Low weight (≈4 g) and three-module pack for parallel or redundant setups

What accuracy and stability can I rely on over time?

This module offers better linearity and precision than many general-purpose op-amps for low-voltage amplification, delivering stable performance for long-term measurements. The AD620’s low offset and predictable drift help keep readings consistent month-to-month when installed properly.

• Offset voltage around 50 μV for minimal error at low gain
• Maximum stability specification ~2 μV per month under normal conditions
• Low offset drift supports temperature-sensitive applications
• Good linearity compared with standard LM358-style amplifiers

Who is this for: hobbyists, electronics students, prototyping engineers, and instrumentation tinkerers who need a compact, high-precision amplifier to boost microvolt or millivolt signals for data acquisition, sensor readout, small-signal conditioning, or pre-amplification before ADCs. If you lack basic electronics experience you'll still get technical support, but this module assumes familiarity with supply wiring, signal grounding, and safely adjusting gain and offset.