# WM8234 6-Channel AFE Datasheet Summary

## Description

The WM8234 is a 16-bit analog front end/digitizer IC designed for processing analog signals from CCD or CIS sensors up to 23MSPS. It includes reset level clamping, correlated double sampling, programmable gain, automatic gain control, and offset adjustment in six channels. Output is time-multiplexed to two 16-bit ADCs with selectable LVDS or CMOS output.

## Features

️· Performance: 70MSPS conversion rate, 16-bit ADC resolution.
️· Power: 3.3V single supply operation, 280mA current consumption.
️· Signal Processing: Sample and hold, correlated double sampling, programmable offset adjust, flexible clamp timing, automatic gain control, automatic black level calibration.
️· Output: LVDS (5-pair, 490MHz, 35-bit data) or CMOS (90MHz max) output options.
️· Clocking: Internal clock generator (5-23MHz MCLK), programmable CIS/CCD timing generator.
️· Package: 56-lead QFN (7mm x 7mm).
️· Interface: Serial control interface.

## Applications

️· Digital copiers
️· USB 2.0 compatible scanners
️· Multi-function peripherals
️· High-speed CCD/CIS sensor interface

## Pin Configuration

The device features pins for analog inputs (IN1-6), analog/digital supplies (AVDD1/2, DBVDD, LDOVDD), digital interface (SDI, SDO, SCK, SEN), clock signals (MCLK, TGSYNC, CLK1-11) and various control/reference voltages.

## Ordering Information

️· WM8234GEFL/V: -40 to 85°C, 56-lead QFN (Pb-free)
️· WM8234GEFL/RV: -40 to 85°C, 56-lead QFN, Tape and Reel (Pb-free)

## Absolute Maximum Ratings

️· Supply Voltage: -0.3V to 5V
️· Operating Temperature: -40°C to +85°C

## Electrical Characteristics

️· Full-scale input voltage range: 0.12 – 3.0 Vp-p
️· Reference Voltages: VREF1C (2.05-2.25V), VREF3C (1.25-1.05V)
️· Digital I/O: VIH = 0.7 \* AVDD, VIL = 0.2 \* AVDD