PI0128WSN, PI0256WSN, PI0512WSN
Engineering Data Sheet
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
VSS
VDD
START
CLK
EOS
QOUT
TD1
TD2
NC
Ground.
+5.0 Volts.
Start Pulse: Input to start the line scan.
Clock Pulse: Input to clock the shift register.
End Of Scan: Output from the shift register to indicate the completion of one
line scan.
Video Charge Output: Output from the photodiodes pixels.
Temperature Diode 1: Anode of temperature diode 1.
Temperature Diode 2: Anode of temperature diode 2.
No Connection
Function and Description
Page 4 of 8
Revised March 21, 2002
AMI [ AMI SEMICONDUCTOR ]
