PC2000
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PC2000-PC/104 Data Sheet
Description
The Ocean Optics OEM PC2000-PC/104 Spectrometer includes the linear CCD-array optical bench,
plus the digital interface necessary to function on a PC/104 bus. The result is a compact, flexible
system with no moving parts that's easily integrated as an OEM component.
The PC2000-PC/104 spectrometer is a unique combination of technologies providing users with both
an unusually high spectral response and good optical resolution in a single package. The electronics
have been designed for considerable flexibility in connecting to various PC2000-PC/104 series
modules as well as external interfaces. The PC2000-PC/104 can be directly coupled to as many as
seven "slave" spectrometer channels of various designs. The information included in this guide
provides detailed instructions on the connection and operation of the PC2000-PC/104.
The detector used in the PC2000-PC/104 spectrometer is a high-sensitivity 2048-element CCD array
from Sony, product number ILX511. (For complete details on this detector, visit Sony’s web site at
http://www.sel.sony.com/semi/PDF/ILX511.pdf. However, Ocean Optics applies a coating to all
ILX511 detectors, so the optical sensitivity could vary from that specified in the Sony datasheet).
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PC2000-PC/104 Data Sheet
Features
High sensitivity of up to 90 photons/counts
An optical resolution of 3 pixels (FWHM)
A wide variety of optics available
• 14 gratings
• 6 slit widths
• 3 detector coatings
• 6 optical filters
Integration times from 2 to >30,000 milliseconds
Modular design allows up to 7 slave spectrometer channels to operate from one master
channel
2MHz, 12 bit A/D, ± ½ bit accuracy
Supports free-running an 3 external trigger modes
Digital Interface
Memory mapped registers
Interrupt driven
2,048 deep FIFOs for on board storage
Can acquire spectra simultaneously from all 8 channels at reduced pixel density
Strobe signals for external synchronization
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PC2000-PC/104 Data Sheet
Specifications
Specifications Criteria
Absolute Maximum Ratings:
V
CC
Voltage on any pin
+ 5.5 VDC
Vcc + 0.2 VDC
Physical Specifications:
Physical Dimensions (no enclosure)
Weight
4.05 (W) x 3.78 (L) x 0.70 (H) inches
200 g
Power:
Power requirement (master)
Supply voltage
Power-up time
250 mA at +5 VDC
4.5 – 5.5 V
3 msec
Spectrometer:
Design
Focal length (input)
Focal length (output)
Input Fiber Connector
Gratings
Entrance Slit
Detector
Filters
Asymmetric crossed Czerny-Turner
42mm
68mm (75, 83 and 90 mm focal lengths are also available)
SMA 905
14 different gratings
5, 10, 25, 50, 100, or 200 µm slits. (Slits are optional. In the
absence of a slit, the fiber acts as the entrance slit.)
Sony ILX511 CCD
Selection of Long Pass Filters to eliminate 2
nd
order (optional)
Spectroscopic:
Integration Time
Dynamic Range
Signal-to-Noise
Readout Noise (single dark spectrum)
Resolution (FWHM)
Stray Light
Spectrometer Channels
3 – >30,000 msec
2 x 10
8
250:1 single acquisition
3.5 counts RMS, 20 counts peak-to-peak
0.03 – 10.0 nm varies by configuration
<0.05% at 600 nm; <0.10% at 435 nm
8 (master plus 7 slaves)
Environmental Conditions:
Temperature
Humidity
-30° to +70° C Storage & -10° to +60° C Operation
0% - 90% noncondensing
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PC2000-PC/104 Data Sheet
Electrical Pinouts
J2 Electrical Connector
Pin I/O Function Pin I/O Function
1 I Analog Channel 1 14 Gnd
2 I Analog Channel 2 15 N/C Reserved – D2
3 I Analog Channel 3 16 N/C Reserved – D0
4 I Analog Channel 4 17 O Continuous Strobe
5 I Analog Channel 5 18 I External Hardware Trigger
6 I Analog Channel 6 19 O Array Clock Output
7 I Analog Channel 7 20 O Lamp Enable - S0
8 Vcc 21 O Single Strobe
9 O CCD Temperature 22 I External Sync Input
10 Vcc 23 O Read Out Gate
11 Gnd 24 N/C Reserved – D1
12 N/C 25 N/C Reserved – D3
13 Gnd 26 I Software Trigger
J2 on PC104 is Samtec #STMM-113-02-S-D-RA, the mating part is a ribbon cable #TCSD-13-D-
(length)-01--other mating options are SQT,SQW,ESQT,TLE,SMM,MMS
Pin Function Description
Function Description
Analog Channel 0 - 7
The analog signals that correspond to the output from the 8 spectrometer
channels. Inputs for channels 1-7 are available on J1.
V
CC
The positive supply voltage +5VDC.
GND The ground (supply voltage return) or case ground.
Lamp Enable Software-controlled TTL signal commonly used for activation of Light Sources
Software Trigger
Active high TTL input signal used to trigger the acquisition system in the
External Software Trigger mode.
Single Strobe
TTL output signal used to pulse a strobe that is high at the start of each
integration period.
Continuous Strobe
TTL output signal used to pulse a strobe that is divided down from the Master
Clock signal.
External Hardware Trigger
TTL trigger signal (rising edge trigger input) used in External Hardware Trigger
mode.
External Sync Input Trigger
TTL signal used to define the integration time (time between rising edges)
when using the External Synchronization Trigger mode.
CCD Temperature
Analog signal generated from an LM35 mounted in close proximity to the
CCD. The analog output is 10mv/C.
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PC2000-PC/104 Data Sheet
Interface Information
Pixel Definition
A series of pixels in the beginning of the scan have been covered with an opaque material to
compensate for thermal induced drift of the baseline signal. As the PC2000-PC/104 warms up, the
baseline signal will shift slowly downward a few counts depending on the external environment.
(Temperature-regulated units do not exhibit this shift.) The baseline signal is set between 50 and 100
counts at the time of manufacture. If the baseline signal is manually adjusted, it should be left high
enough to allow for system drift. The following is a description of all of the pixels:
Pixel Description
0–1 Not usable
2–24 Optical black pixels
24–25 Transition pixels
26–2674 Optical active pixels
It is important to note that Ocean Optics A/D products only digitize the first 2048 pixels, as they all
have a 2048 x 16 FIFO buffer.
Analog Section
The PC2000-PC/104 is capable of supporting the output of up to 8 spectrometer channels (master
channel plus 7 slave channels). The spectrometer channel is determined by switch SW2. Within a
stack, there should be only one spectrometer on any given channel. The master spectrometer is
hardwired to the master channel (channel 0). Each spectrometer generates an analog signal (-2.5 -
+2.5V), which corresponds to the input spectra.
Clock Signals
Master Clock
The frequency of this clock is set via software. The A/D rate is one-half that of the Master Clock. The
maximum rate for the Master Clock is 4MHz, which equates to an A/D rate of 2 MHz. A
recommended minimum frequency is 100 kHz.
Integration Clock
The frequency of this clock is set via software. The period for the integration time clock should be
longer than 4100 master clock periods in order to read the entire array. This equates to 1.1ms.
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