ARRAY. TSL2301 Datasheet

TSL2301 Datasheet PDF


Part

TSL2301

Description

102 X 1 LINEAR OPTICAL SENSOR ARRAY

Manufacture

TAOS

Page 12 Pages
Datasheet
Download TSL2301 Datasheet


TSL2301 Datasheet
t TSL2301
102 × 1 LINEAR OPTICAL SENSOR ARRAY
t WITH ANALOGĆTOĆDIGITAL CONVERTER
TAOS007 – JULY 2000
D 102 × 1 Sensor Element Organization
D 300 Dots-per-Inch Pixel Pitch
D On-Chip 8-Bit Analog-to-Digital Converter
D Three-Zone Programmable Offset (Dark Level) and Gain
D High Speed (10 MHz) Clocked Serial Interface
D 1-MHz Pixel Rate
D Single 5-V Supply
(TOP VIEW)
SCLK
VDD
SDIN
SDOUT
1
2
3
4
8 NC
7 GND
6 GND
5 NC
NC – No internal connection
Description
The TSL2301 is a 300-dpi, 102-pixel linear optical sensor array with an integrated 8-bit analog-to-digital
converter. The pixels are on 85-µm centers and measure 85 µm (H) by 77 µm (W) with 8 µm between pixels.
Associated with each pixel is a charge integrator/amplifier and sample-hold circuit. All pixels have concurrent
integration periods and sampling times. Data communication is accomplished through a three-wire serial
interface. The array is split into three 34-pixel zones, with each zone having programmable gain and offset
levels.
www.DataSheet4U.com
The TSL2301 is intended for use in high-performance, cost-critical imaging and optical sensing applications.
Functional Block Diagram
PIXEL ARRAY WITH INTEGRATORS AND S-H
PIXCLK SI HOLD ZERO
LEFT EVEN RIGHT ODD
RIGHT EVEN IREF
SCLK
SDIN
SDOUT
DIGITAL I/O
AND
CONTROL
8
DB<7:0>
5 ADDR<4:0>
VREF
READ
OUTPUT CHARGE-TO-
VOLTAGE CONVERTER
IREF
WRITE
WITH PROGRAMMABLE
3
SECTOR
GAINS AND OFFSETS
BIAS
BLOCK
RESET/SAMPLE
START
ADCLK
DUAL 8-BIT
SA ADC
VREF
IREF
www.taosinc.com
Texas Advantced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 S Plano, TX 75074 S (972) 673-0759
t
Copyright E 2000, TAOS Inc.
1

TSL2301 Datasheet
TSL2301
102 × 1 LINEAR OPTICAL SENSOR ARRAY
WITH ANALOGĆTOĆDIGITAL CONVERTER
TAOS007 – JULY 2000
Terminal Functions
TERMINAL
NAME
NO.
GND
6, 7
SCLK
1
SDIN
3
SDOUT
4
VDD
2
I/O DESCRIPTION
Ground
Clock input for SDIN and SDOUT
Serial data input. Data is clocked in on the rising edge of CLK.
Serial data output. Data is clocked out on the falling edge of CLK.
Supply voltage, VDD is nominally 5 V.
Detailed Description
The sensor consist of 102 photodiodes, also called pixels, arranged in a linear array. Light energy impinging
on the pixels generates a photocurrent, which is then integrated by the active integration circuitry associated
with each pixel. During the integration period, a sampling capacitor connects to the output of the integrator
through an analog switch. The amount of charge accumulated at each pixel is directly proportional to the light
www.DataSheientt4enUs.ictyo(mEe) on that pixel and the integration time (tint).
The array is divided into three 34-pixel zones, with each zone having programmable gain and offset (dark signal)
correction. The offset correction is controlled by an 8-bit DAC and is performed in the analog domain prior to
the digital conversion. There is a separate offset DAC for each of the three zones. The offset value is signed,
with codes 0 – 7Fh corresponding to positive offset values and codes 80h – FFh corresponding to increasingly
negative offset values. Offset adjustments should be made before setting the gain, but may have to be
readjusted after the gain changes are made. The gain adjustment is controlled by a 5-bit DAC, with positive gain
values ranging from 0 to 1Fh. There is a separate gain DAC for each of the three zones. Table 1 lists the gain
settings and the resulting gain change.
Integration, sampling, output, and reset of the integrators are performed by the control logic in response to
commands input via the SDIN pin. A normal sequence of operation consists of a pixel reset (RESET), start of
integration (STARTInt), sampling of integrators (SAMPLEInt), and pixel output (READPixel). Reset sets all the
integrators to zero. Start of integration releases the integrators from the reset state and defines the beginning
of the integration period. Sampling the integrators ends the integration period and stores the charge
accumulated in each pixel in a sample and hold circuit. Reading the pixels causes the sampled value of each
pixel to be converted to 8-bit digital format and output on the SDOUT pin. All 102 pixels are output sequentially
unless interrupted by an abort (ABORTPixel) command or reset by a RESET command.
The commands coming from the controller via the SDIN line are synchronous with the SCLK, which nominally
operates at 10 MHz. The protocol for both the data and control words employs the USART convention of
start/stop delimiters. There is one start bit and one stop bit.
Copyright E 2000, TAOS Inc.
2
t
www.taosinc.com
t


Features Datasheet pdf t t TSL2301 102 × 1 LINEAR OPTICAL SE NSOR ARRAY WITH ANALOGĆTOĆDIGITAL CON VERTER TAOS007 – JULY 2000 D D D D D D D 102 × 1 Sensor Element Organizat ion 300 Dots-per-Inch Pixel Pitch On-Ch ip 8-Bit Analog-to-Digital Converter Th ree-Zone Programmable Offset (Dark Leve l) and Gain High Speed (10 MHz) Clocked Serial Interface 1-MHz Pixel Rate Sing le 5-V Supply (TOP VIEW) SCLK VDD SDI N SDOUT 1 2 3 4 8 7 6 5 NC GND GND N C NC – No internal connection Descr iption The TSL2301 is a 300-dpi, 102-pi xel linear optical sensor array with an integrated 8-bit analog-to-digital con verter. The pixels are on 85-µm center s and measure 85 µm (H) by 77 µm (W) with 8 µm between pixels. Associated w ith each pixel is a charge integrator/a mplifier and sample-hold circuit. All p ixels have concurrent integration perio ds and sampling times. Data communicati on is accomplished through a three-wire serial interface. The array is split i nto three 34-pixel zones, with each zone having programmable gain and offse.
Keywords TSL2301, datasheet, pdf, TAOS, 102, X, 1, LINEAR, OPTICAL, SENSOR, ARRAY, SL2301, L2301, 2301, TSL230, TSL23, TSL2, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)