View source for Siliconix LD110/111A

[[File:Siliconix_LD110_LD111A_block.PNG|thumb|500px|LD110/111 block diagram (click to enlarge)]]  [[File:LD110-LD111A_DVM_circuit.png|thumb|500px|LD110/111 DVM application circuit (click to enlarge)]]
{{Monolithic IC
|Manufacturer=Siliconix
|Model=LD110/111(A)
|Part_nos=156-0476-00,156-0476-00,156-1268-00
|Description=3½ digit A/D converter
|Used_in=DM502;DM502A;DM505;
}} chip set from the mid-1970s.

The LD110 (156-0476-00) is a PMOS digital processor that combines counting, storage, and data multiplexing functions.

The LD111 (156-0477-00) is an analog processor in mixed bipolar and MOSFET technology. 
 
The LD111A (156-1268-00) is a pin-compatible update of the earlier LD111.  It eliminated the need for an integrator clamp zener, and offered improved linearity, noise and temperature stability,