SENSYLINK Microelectronics (CT1820S) Single-Wire Digital Temperature Sensor CT1820S is a Digital Temperature Sensor with±0.5 C Accuracy over -10 C to 80 C. Single-Wire Digital interface is Compatible with 1-wire Interface. It is ideally used in Industry System and General Temperature Monitor etc. 1
Description CT1820S is a digital temperature sensor with ± 0.5 o C(Max.) accuracy over -10 o C to 80 o C. Temperature data can be read out directly via Single- Wire interface (compatible with 1-wire bus in protocol) by MCU. It includes a high precision band-gap circuit, a 9-bit analog to digital converter that can offer 0.5 o C resolution, a calibration unit with non-volatile memory, 8-bit CRC generator and a digital interface block. Each chip has a unique 64-bit ROM ID, which allows multiple devices to connect the same Single- Wire bus. MCU can distinguish and access each device individually by different ROM ID. It has programmable temperature Alarm function for upper and lower trigger temperature. Features Operation Voltage: 1.8V to 5.5V Operating Current: 30uA during Temperature conversion; Average Consumption Current: 0.2uA (Typ.) with reading once temperature per second Standby Current: 50nA (Typ.), 150nA (Max.) Temperature Conversion time: 4ms at 9-bit Temperature Accuracy without calibration: ±0.5 o C(Max.) from -10 o C to 80 o C 9 bit ADC for 0.5 o C resolution Compatible with 1-wire interface Temperature Range: -50 o C to 125 o C Package: TO-92 Applications Industry System General Temperature Monitor PIN Configurations (Top View) 3 2 1 3 VCC 2 DIO 1 GND TO-92 (package code Z) Typical Application VCC MCU GPIO 1.0-4.7k VCC DIO GND CT1820S Figure 1. Typical Application of CT1820S 2
Pin Description CT1820S PIN No. PIN Name Description GND 1 Ground pin. DIO 2 VCC 3 Digital interface data input and output pin, Generally it needs a pull-up resistor to VCC in most applications, between 1.0k and 4.7k. Power supply input pin, it should connect a 100nF to 1.0uF ceramic cap at least to ground. Function Block VCC Regulator Amplifer &ADC 64-bit ROMID& 8-bit CRC Digital Logic & Interface DIO T-Sensor VREF Calibration Memory GND Figure 2. CT1820S function block 3
Ordering Information CT1820S X X Package Type Z : TO-92 Packing Blank: Bulk Order PN Accuracy Green 1 Package CT1820SZ ±0.5 o C Halogen free TO-92 Marking ID 2 Packing MPQ Operation Temperature 1820S Bulk 1,000-50 o C~+125 o C YWWAXX Notes 1. Based on ROHS Y2012 spec, Halogen free covers lead free. So most package types Sensylink offers only states halogen free, instead of lead free. 2. Marking ID includes 2 rows of characters. In general, the 1st row of characters are part number, and the 2nd row of characters are date code plus production information. 1) Generally, date code is represented by 3 numbers. The number stands for year and work week information. e.g. 501stands for the first work week of year 2015;621 stands for the 21st work week of year 2016. 2) Right after the date code information, the next 2-3 numbers or letters are specified to stands for supplier or production location information. 3. For very small outline package, there s 4 digits to stands for product information and date code, first 2 digits represent product code, and the other 2 digits stands for work week 4
Absolute Maximum Ratings (Note 3) Parameter Symbol Value Unit Supply Voltage V CC to GND -0.3 to 5.5 V I/O pin Voltage V IO to GND -0.3 to 5.5 V Operation junction temperature T J -50 to 150 ºC Storage temperature Range T STG -65 to 150 ºC Lead Temperature (Soldering, 10 Seconds) T LEAD 260 ºC ESD MM ESD MM 600 V ESD HBM ESD HBM 6000 V ESD CDM ESD CDM 1000 V Note 3 1. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at the "Absolute Maximum Ratings" conditions or any other conditions beyond those indicated under "Recommended Operating Conditions" is not recommended. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. 2. Using 2oz dual layer (Top, Bottom) FR4 PCB with 4x4 mm 2 cooper as thermal PAD Recommended Operating Conditions Parameter Symbol Value Unit Supply Voltage V CC 1.8 ~ 5.5 V Ambient Operation Temperature Range T A -50 ~ +125 C 5
Package Outline Dimensions (TO-92) TO-92 Unit (mm) Symbol Dimensions in Millimeters Dimensions in Inches Min. Max. Min. Max. A 3.300 3.800 0.130 0.150 A1 1.100 1.400 0.043 0.055 b 0.380 0.550 0.015 0.022 c 0.300 0.510 0.012 0.020 D 4.300 4.700 0.169 0.185 D1 3.430 0.014 E 4.300 4.700 0.169 0.185 e e1 1.270(TYP) 2.540(TYP) 0.050(TYP) 0.100(TYP) L 13.000 15.000 0.512 0.590 6
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