Texas Instruments DLP NIRscan, User Manual, Page: 9 / 73

Microcontroller Board
DMD Board
DLP Controller Board
Detector Board
DLP Controller
DLPC150
Flash
DMD
DLP2010NIR
DMD Flex
24-bit ADC
ADS1255
SPI
Microprocessor
TM4C129
USB Slave
I2C2
Amplifier
OPA2376
InGaAs
Detector
24bit RGB
Power
Management
TPS63036
TPS81256
TPS82671
TPS386596
TPS22904
SSI2
I2C 24bit RGB
SSSI3
UART3
Bluetooth
CC2564MODN
SSI1
PMIC
DLPA2005
LVDS
SPI SPI
Ctrl Ctrl
Grating
Processor
Interface
RF/IF
Amplifier
Logic
Power
ADC/DAC
Clocks
Others
LEGEND
Battery
Charger
BQ24250
Sample
Reflective
Module
Li-Polymer
Battery*
*Battery Not Included
Amp
OPA350
2.5V Ref
REF5025
I2C6
Hum & Temp Sensor
HDC1000
SENS
IR Temp
TMP006
I2C7
EPI0
SDRAM
AS4C16M16S (32MB)
I2C9
SSI0
Exp
Conn
UART4
Triggers
GPIOs
LEDs Buttons
On
/Off
Bluetooth
Scan
On/Off Scan/BT Pair
JTAG
ARM
10pin header
Lamp Driver
OPA567 INA213 TPS81256
T
*Thermistor Not Included
Thermistor
char
ging
USB Power
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What is the DLP NIRscan Nano EVM?
• Constant current lamp driver based on OPA567 and monitored by INA213
– Detector board
• Low-noise differential amplifier circuit
• ADS1255 30 kSPS analog-to-digital converter (ADC) with SPI
• TMP006 thermopile sensor for detector and ambient temperature measurement
• 1-mm non-cooled Hamamatsu G12180-010A InGaAs photodiode
– DMD board
• DLP2010NIR near-infrared digital micromirror device
Figure 1-1 shows the NIRscan Nano hardware block diagram.
Figure 1-1. DLP NIRscan Nano Block Diagram
1.2.1 Optical Engine
The DLP NIRscan Nano EVM spectrometer optical engine is mounted on top of the electronics
subsystem. The configuration is a post-dispersive architecture with a removable reflectance sample
module. The reflectance module includes two lens-end broadband tungsten filament lamps. In this specific
implementation, depicted in
Figure 1-2 , a sample is placed against the sapphire front window of the
reflectance head. During a scan, the sample absorbs a specific amount of NIR light and diffusely reflects
the non-absorbed light into the system. The amount of light absorbed at each wavelength is dependent on
the molecular makeup of the material, and is specific to that material, a
chemical fingerprint . The light
diffusely reflected from the sample is gathered by the collection lens and focused into the optical engine
9 DLPU030B – June 2015 – Revised July 2015 DLP NIRscan Nano Overview
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