Delta-Sigma Converter

[Dave]

leonel, have a look at the MCP355x series of Delta-Sigma Converters. I have done some work with the MCP3553 and am planning on incorporating into a new design. They are fully differential and the MCP3553 has a 16Ms. update rate. The series is made by Microchip.

Dave Purola,
N8NTA

[leonel]

Using MCP3553 probably will work, but my circuit is to be supplied with 4 batteries of 1.5V, +-700mAh. MCP3553 has 170uA of current supply it's a little too much.
I would like to have a consume of about +-20uA.

[Dave]

leonel, In shutdown mode it only draws 1 uA...... In sleep mode it only draws 10uA......

Dave Purola,
N8NTA