AMIS-732128 Datasheet, PDF (5/9 Pages) AMI SEMICONDUCTOR – 50μm-pitch Wide Aperture Spectroscopic Photodiode Arrays

AMIS-732128, AMIS-732256, AMIS-732512
50µm-pitch Wide Aperture Spectroscopic Photodiode Arrays
Data Sheet
5.0 I/O Pins
Although the WSN package has 22 pins, as shown in Figure 1, there are only six functionally active I/O pins in addition to the supply
pins, as shown in Figure 5. In essence, only two clocks, CLK and START, are required for controlling the timing of the sensor's video
readout. The remaining I/O descriptions are for the video signal output, the end-of-scan signal, the two temperature diodes, and the
supply biases. QOUT must be biased externally to Vbias (see Section 7.0 Recommended Operating Conditions). Each temperature
diode is operated with a small constant current that forward-biases its PN junction. By measuring 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
+5.0V
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
6.0 Clock and Voltage Requirements
The clocking requirements are relatively simple. As it was indicated in Figure 5 and Table 1, there are only two input signals that require
clocked inputs. They are CLK, the clock for the shift register, and START, the shift register start pulse. The timing specifications and the
symbol definition for Figure 6 are listed in Table 2. The control clock amplitudes for I/Os are compatible with the 5V CMOS devices.
Figure 6: Timing Diagram
AMI Semiconductor – Dec. 05, M-20491-001
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