Data sheet DZA-VVIR-LD0 pages

Preamplifier Electronics for
Sensors Unlimited InGaAs Photodiode Arrays
SUxxxLD and SUxxxLX
In der Au 27
61440 Oberursel / Germany

DZA-VVIR-LD

Phone: +49 (0) 6171 / 9758 – 0
Fax: +49 (0) 6171 / 9758 – 50
E-Mail: sales@tec5.com
Internet: www.tec5.com

Product ID: 0106253.10
Document: ds_dza-vvir-ld_103e.doc

The sampling instant is indicated by the rising slope of
the TRIGGER signal. The pixel frequency of a 128 or
256 element LX array or a 512 element LD array equals
1/4 of the CLK frequency. The readout time is derived
from the numbers of pixels N as:
treadout = ((N x p) + 96) / fCLK,
with p = 4 for the sensors mentioned above. The preamplifier board switches automatically between ‘odd’
and ‘even’ pixels. After the output of all pixel signals an
EndOfScan pulse is generated by the board. With this
EOS signal, the integration period starts simultaneously
for all pixels and ends with the next START pulse. The
complete measurement cycle duration is equal to the
integration time plus the readout time.

Technical Data
Short Description
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Compact preamplifier electronics for Sensors
Unlimited InGaAs photodiode arrays of series
SUxxxLD and SuxxxLX with RT or T1 pinout
Direct positioning of PCB on sensor chip
Device input: sensor chip
Device output: Front End Electronics with sensor
interface ‚Sensor_U1’ (FEE-1M /NIR-2, FEE-NIR)
PCB dimensions: 72 mm x 55 mm
Connector for temperature controller

General
The preamplifier electronics DZA-VVIR-LD serves as an
interfacing component between the Sensors Unlimited
InGaAs photodiode arrays of series SUxxxLD or -LX
and the Front End Electronics board of a tec5 operating
electronics. Typically, the photodiode array is plugged
into the connector DIL-28 on the soldering side of the
PCB.
The interface to the Front End Electronics complies to
the tec5 specification ‚Sensor_U1’ (MICS-14, MICS-4
and SMB socket with pin contact, video signal ‚differential’).
A Peltier cooler control electronics can access the preamplifier via a MICS-6 connector.

Features
Based on the CLK and START input signals the preamplifier board generates all signals required to read out a
sensor chip. The analog signals from the sensor array
are primed and are provided differentially for further
processing (video signal).

Diode arrays:

Sensors Unlimited InGaAs photodiode
arrays of series SUxxxLD and SUxxxLX
with RT or T1 pinout
Number of pixels:
128, 256 or 512
CLK frequency:
max. 2 MHz
Readout time (512):
1.058 ms at 2 MHz CLK
Min. integration time:
0.1 ms
Analog Range:
Output signal:
Total gain:

± 0 ... 3 V
1.4

Digital Input Control Signals (AHC level):
START:
Start of readout cycle, if signal 'START'
is High and 'CLK' has a falling slope.
CLK:
Clock signal for the array. The pixel
frequency is 1/4 of the CLK frequency
Digital Output Control Signals (AHC level):
TRIGGER
Signal for reading out the video signal,
read with the rising slope
/EOS:
EndOfScan, Signal /EOS is High during
readout procedure. After the final pixel
is read, a LOW pulse is generated for
the time the CLK signal is high. This indicates the end of the array.
Signal Behavior:
STAR
T
CLK
2
EO S
T R IG
G e rG
V ID E
O

For further details refer to Sensors Unlimited datasheet.