Exhibit 23.3

CONSENT OF INDEPENDENT ACCOUNTANTS

    We consent to the reference to our firm under the caption "Experts" in the Registration Statement (Form S-3) and related Prospectus of ADC Telecommunications, Inc. for the registration of 100,000 shares of its common stock and to the incorporation by reference therein of our report dated January 22, 1998 (except for Comprehensive Income as to which the date is March 12, 1999) with respect to the consolidated statements of income, changes in shareholders' equity and cash flows of Saville Systems PLC for the year ended December 31, 1997 included in the Annual Report (Form 10-K) of ADC Telecommunications, Inc. for the year ended October 31, 1999, filed with the Securities and Exchange Commission.

/s/ ERNST & YOUNG   
Ernst & Young

Galway, Ireland
January 19, 2000