**Details** This ADC Tibbit uses an RCV420 current loop receiver front-end and an ADC1100 16-bit analog-to-digital converter IC. To lower noise and improve resolution, this Tibbit has its own isolated power domain. The full-scale conversion error for this Tibbit does not exceed 2%, and the effective flicker-free resolution is 15 bits. Combine this Tibbit with #21 (four terminal blocks), #20 (nine terminal blocks) or #19 (DB9M connector). It's not common but possible to use the latter for wiring into the meter's inputs. **LEDs** There is one red and one yellow LED. The red LED is connected to the SCL line of the I2C interface; the yellow LED – to the SDA line. **Sample project** The use of this Tibbit is illustrated by a Tibbo BASIC test project. You can find it here: [https://github.com/tibbotech/CA-Test-Tibbit-53](https://github.com/tibbotech/CA-Test-Tibbit-53).