Description

WM0834 and WM0838 are 8-bit analogue to digital converters (ADC) with configurable 4-input and 8-input multiplexers respectively and a serial I/O interface.

Assignment of the multiplexer inputs is configured before each conversion via the serial data input to give single-ended or differential operation for the selected inputs. A mixture of input configurations can be used in the same application. WM0838 also has a pseudo-differential configuration where all 8 inputs can be refered to a common input at an arbitrary voltage.

Features

• Functionally Equivalent to National Semiconductor ADC0834 and ADC0838 without the Internal Zener Regulator Network

• 4-input (WM0834) or 8-input (WM0838) MUX options

• Reference input operates ratiometrically or with a fixed reference

• Input range 0 to Vcc with Vcc Reference

• 5V and 3.3V variants

• Total Unadjusted Error: ± 1 LSB

• 8-bit resolution

• Low Power

• 32 µs conversion time at fclock = 250 kHz

• Serial I/O interface

• WM0834 packages: 14 pin SO & DIP

WM0838 packages: 20 pin wide-body SO & DIP

Applications

• Embedding with remote sensors

• Equipment health monitoring

• Automotive

• Industrial control