TLC8188

The TLC8188 is a highly-integrated monolithic analog signal processor/digitizer designed to interface the contact image sensor (CIS) and linear charge-coupled device (CCD) image sensors in scanner applications. The input of the TLC8188 allows direct connection to the CIS and direct ac coupling of the linear CCD. The TLC8188 performs all the analog processing functions necessary to maximize the dynamic range, correct various errors associated with the CIS and the linear CCD sensors, and then digitize the results with an on-chip analog-to-digital converter (ADC). The key components of the TLC8188 include: input clamp circuitry and a correlated double sampler (CDS), a programmable gain amplifier (PGA) with auto-cycling gain control, a programmable offset correction controlled by a digital-to-analog converter (DAC), a 10-bit, 4 MSPS pipeline ADC, a bidirectional parallel bus and a three-wire serial port for easy microprocessor interface, and internal reference voltages.

Designed in advanced CMOS process, the TLC8188 operates from a single 5-V power supply and its digital interface is 3 V compatible. The normal power consumption of the TLC8188 is just 190 mW.

Fully integrated analog processing circuitry, high throughput rate, single supply operation and low cost make the TLC8188 an ideal CIS/linear CCD sensor interfacing solution for imaging applications such as scanners and multifunctional office equipment (printer/scanner/facsimile/copier).

The TLC8188 is available in a 32-pin TSSOP package and is specified over the 0°C to 70°C operating temperature range.