Interface module with low-latency communication of electrical signals between power domains

A system, comprising:

• an integrated circuit comprising an interface module, wherein the interface module comprises:
• a digital controller in a first power domain;
• a first analog front end (AFE) circuit in a second power domain;
• and
• up/down level shifters configured to communicate electrical signals that include a DC component from the first power domain to the second power domain, wherein the communication of the electrical signals between the first power domain and the second power domain is within the integrated circuit, and
• wherein the communication of the electrical signals from the first power domain to the second power domain by a given up/down level shifter in the up/down level shifters comprises transforming a single-ended electrical signal into a differential electrical signal, which is received differentially across the power-domain boundary between the first power domain and the second power domain and is then converted back to a single-ended electrical signal.

A method for communicating electrical signals that include a DC component from a first power domain to a second power domain, comprising:

• by an interface module in an integrated circuit:
• communicating the electrical signals that include the DC component from a digital controller in the first power domain to a first analog front end (AFE) in the second power domain, wherein the communicating comprises performing level shifting, using up/down level shifters, of the electrical signals that include the DC component from the first power domain to the second power domain,
• wherein the communication of the electrical signals between the first power domain and the second power domain is within the integrated circuit, and
• wherein the communication of the electrical signals from the first power domain to the second power domain by a given up/down level shifter in the up/down level shifters comprises transforming a single-ended electrical signal into a differential electrical signal, which is received differentially across the power-domain boundary between the first power domain and the second power domain and is then converted back to a single-ended electrical signal.