PI0128WSN, PI0256WSN, PI0512WSN

Engineering Data Sheet

Page 4 of 8

Revised March 21, 2002

video signal output, the end-of-scan signal, the two

temperature diodes, and the supply biases. QOUT

must be biased externally to Vbias (see Recom-

mended Operating Conditions section below). Each

temperature diode is operated with a small constant

current that forward-biases its PN junction. By meas-

uring the forward-bias voltage, one can track the silicon

die temperature. The temperature diodes may be

disabled by connecting their anodes to VSS. These

I/Os are listed with their acronym designators and

functional descriptions in the following Table 1.

Table 1. Symbols and functions and I/O pins.

Symbol

Function and Description

VSS

Ground.

VDD

+5.0 Volts.

START

Start Pulse: Input to start the line scan.

CLK

Clock Pulse: Input to clock the shift register.

EOS

End Of Scan: Output from the shift register to indicate the completion of one

line scan.

QOUT

Video Charge Output: Output from the photodiodes pixels.

TD1

Temperature Diode 1: Anode of temperature diode 1.

TD2

Temperature Diode 2: Anode of temperature diode 2.

NC

No Connection