TSPR1A170100 TI | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 15
Technical content
/C0083/C0112/C0114/C0101/C0101/C0116/C0097/C0084/C0077 TSPR1A170100 Spreeta Liquid Sensor Microcomponents Technology Center Analytical Sensors SLYS009B – MARCH 2000 1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 /C0068Real-Time Sensing /C0068Quantitative Analysis† /C0068Internal Fault Detection† /C0068On-Board Factory Set Calibration /C0068Robust Affordable Packaging /C0068Small and Lightweight /C0068Variety of Applications – Refractometry – Diagnostics – Quality Control – Distributed Process Control
description
The Texas Instruments (TI) TSPR1A170100 Spreeta/C0116 liquid analytical sensor allows you to measure the refractive index of liquids that come in contact with the sensing surface. This measurement is obtained using an ultrasensitive physical principle known as surface plasmon resonance (SPR). Electrical connections are made via pins that protrude from the bottom of the device. The pin configuration is similar to a standard 16-pin dual in-line device. The following sections provide detailed information. functional block diagram Clock Start Output 7,8128 X 1 Pixel Detector 128-Bit Shift Register LED 4K I2C Serial EEPROM SDA SCLCathode Anode 15 14 316 VDD Ground6 † When used in conjunction with processor board and Spreeta software ADVANCE INFORMATION Copyright 1999, Texas Instruments IncorporatedPRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. Analytical Sensors Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. I2C is a trademark of Philips Corporation. Spreeta is a trademark of Texas Instruments. Sensing Surface
Spreeta Liquid Sensor Microcomponents Technology Center Analytical Sensors SLYS009B – MARCH 2000
2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
NO. NAME I/O DESCRIPTION
1 NC No internal connection
2 NC No internal connection
3 SDA I/O Read/Write calibration data
4 NC No internal connection
5 CLOCK I Clocks the measurement and output cycles
6 GROUND Device ground
7 OUTPUT O SPR information output (analog) (See Note 1)
8 OUTPUT O SPR information output (analog) (See Note 1)
9 NC No internal connection
10 NC No internal connection
11 VDD Device power
12 NC No internal connection
13 START I Initiates output cycle and internal reset
14 SCL I Clocks calibration data out or data in
15 C O LED cathode
16 A I LED anode
NOTES: 1. Pins 7 and 8 are connected together internally. detailed description The Spreeta/C0116 sensor uses a physical principle called surface plasmon resonance (SPR) to measure the refractive index of liquids in contact with the sensing surface. The sensor consists of a light-emitting diode (LED), a sensing surface, and a light detector integrated into a unique optical package. Electrical connections are made to the sensor via pins at the bottom of the device. Detailed information on surface plasmon resonance can be found at http://www.ti.com/spreeta. When a liquid comes in contact with the sensing surface and the appropriate signals are applied to the pins, the sensor provides an output that corresponds with the refractive index of the liquid. The output of the Spreeta/C0116 sensor is a series of analog voltages, one per clock pulse, from which the refractive index of the liquid is derived when the voltages are digitized and processed with the proper algorithm. The TSPR1A170100 Spreeta/C0116 liquid sensor has a dynamic range of 1.320 to 1.368 refractive index units (RIU) with a resolution of 5 X 10–6 RIU. The physical dimensions of the Spreeta/C0116 are shown in Figure 13 on page 14. sensor operation See the functional block diagram and Figure 1 for this discussion. Using the Spreeta/C0116 sensor to measure the refractive index of a liquid requires the proper application of signals to the pins. See Figure 1 for a diagram of the measurement cycle. A pulse is applied to the START pin. On the subsequent positive edge of the CLOCK, the start pulse is clocked into the internal shift register initiating a reset cycle. Simultaneously, the data output cycle begins and the first data bit is presented to the OUTPUT pin. Data presented to the OUTPUT pin will always be data collected during the previous measurement cycle. An additional 127 clock pulses are required to complete the data output cycle. With each clock pulse during the data output cycle a new data bit is presented to the OUTPUT pin. One additional clock pulse, (129 th) is required to end the data output cycle and clear the internal shift register. ADVANCE INFORMATION
129 Clock
18 Clock Cycles
Figure 1. Timing Waveforms register. The minimum time allowed for the measurement cycle is 111 clock cycles (129 – 18 clock pulses). the internal shift register. the LED does not experience excessive currents. LED illuminated, the sensor in a dark environment, and with no liquid on the sensing surface.
4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Figure 2 illustrates operational waveforms for the Spreeta/C0116 sensor. Figure 2. Operational Waveforms implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 2: An external current-limiting resistor is required to avoid damaging the LED with excess currents. NOTE 3: The current-limiting resistor should be selected to limit the current based upon the selected duty cycle.
NOTES: 4. Actual resolution varies depending upon the analog-to-digital (A/D) converter and algorithm used. 14.0 mm long by 1.0 mm wide on the face of the sensor (see Figure 3). Figure 3. Spreeta/C0116 Sensor Active Sensing Region The memory device protocol supports a bidirectional 2-wire bus and data transmission protocol. Bus timing data is shown in Figure 4 and Figure 5. Data transfer may be initiated only when the bus is not busy. while the clock line is high is interpreted as a Start or Stop condition.
6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Figure 4. Bus Timing Start/Stop Figure 5. Bus Timing Data
Calibration storage characteristics are listed in Table 1. Table 1. Calibration Storage Characteristics falling edge of SCL. This is to avoid unintended generation of Start or Stop conditions. Figure 6 illustrates the bus conditions. The bus is considered not busy when both data and clock lines are high. A Start condition occurs when a high-to-low transition occurs on the SDA line while the SCL line is high. A Stop condition occurs when a low-to-high transition occurs on the SDA line while the SCL line is high. Start condition when the data is stable during a high period of the clock cycle. must be preceded by a Start condition. must be ended with a Stop condition.
8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Figure 6. Bus Conditions of the high period of the clock signal. occur, it replaces data in a first-in first-out (FIFO) manner.
master device must generate an extra clock pulse, which is associated with this acknowledge bit. the data line high to enable the master device to generate the Stop condition. defines the operation as read (if set to 1) or write (if set to 0). Figure 7. Control Byte Allocation Table 2. Control Byte Operation Byte write and page write operations are described here. a byte with a word address will follow after it has generated an acknowledge bit during the ninth clock cycle. The next byte transmitted is the word address and it is written into the address pointer of the memory device. acknowledge signals (See Figure 8).
10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Figure 8. Byte Write pointer bits are internally incremented by one. The high-order seven bits of the word address remain constant. condition is received, an internal write cycle begins (see Figure 9). Figure 9. Page Write bit set to one, the memory device issues an acknowledge (ACK) and transmits the 8-bit data word. Figure 10. Current Address Read
12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Table 4. Memory Map
1 Air reference raw data 256 2048 1 128 pixels; 16 bits per pixel
2 Factory use only 5 40 257 N/A
2 Spreeta model number 10 80 262 TSPR1A170100
2 Chip ID number—Date code and
2 LED setting (See Note 6) 1 8 292 0 to 15
2 Sensor integration time (See Note 7)1 8 293 0 to 15
2 Factory use only 1 8 294 N/A
1 Moment level 1 8 295 0 to 255
2 Factory set calibration point 1 4 32 296 TBD
2 Factory set calibration point 2 4 32 300 TBD
2 Factory set calibration point 3 4 32 304 TBD
2 User calibration point 1 4 32 308 TBD
2 User calibration point 2 4 32 312 TBD
2 User calibration point 3 4 32 316 TBD
LED setting number. There is no internal current limit; hence, this number is for reference only. The Spreeta/C0116 sensor is sensitive to high voltages, such as those produced by static electrical discharges. Normal handling is generally not a problem if you are properly grounded prior to handling the sensor. angstroms thick, handling of this surface must be done with care to avoid scratching and damaging it.
Spreeta Liquid Sensor Microcomponents Technology Center Analytical Sensors SLYS009B – MARCH 2000 13POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 ADDITIONAL INFORMATION For details on the TI Spreeta/C0116 liquid sensor and its components, see the Spreeta/C0116 website at: http://www.ti.com/spreeta This website expands on the operation and application of the Spreeta/C0116 liquid sensor, provides access to important documentation, and explains how you can order a Spreeta/C0116 Evaluation Kit. If you have questions or comments, please contact us through our website feedback form or email us at: spreeta@ti.com ADVANCE INFORMATION
14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
0.200 Nom
Figure 13. Spreeta/C0116 Sensor Dimensions
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated