EL220X Series Logic Gate Photocoupler Datasheet - 8-Pin DIP Package - High Speed 5Mbd - Low Input Current 1.6mA - Isolation Voltage 5000Vrms - English Technical Document

1. Product Overview

Jerin EL220X yana wakiltar iyali na manyan ayyuka, sauri na logic gate photocouplers (opto-isolators) da aka tsara don keɓance siginar dijital. Babban aikin shine samar da keɓancewar galvanic tsakanin shigar da kewayen fitarwa yayin watsa siginar matakin logic tare da babban aminci da sauri. Na'urar tana haɗa infrared mai fitar da diode a hankali da aka haɗa zuwa babban sauri na haɗin photodetector tare da matakin fitarwa na ƙofar logic. Ana ba da shi a daidaitaccen fakitin 8-pin Dual In-line (DIP) kuma ana samunsa a cikin bambance-bambancen Na'urar Mount Surface (SMD).

Babban fa'idar wannan jerin yana ta'allaka ne a haɗuwa da babban sauri da ƙarancin buƙatun shigarwar halin yanzu. An ƙera shi don maye gurbin transformers na bugun jini da sauran hanyoyin keɓancewa a cikin mahimman hanyoyin haɗin dijital, yana ba da ƙarfin hali na ƙarfi, sauƙaƙan haɗin ƙira, da ingantaccen aiki a cikin kewayon zafin jiki mai faɗi.

1.1 Fa'idodi na Cibiyar da Kasuwar Manufa

EL220X photocoupler ya bambanta da sassa masu mahimmanci da yawa waɗanda ke ayyana sararin aikace-aikacensa:

• High-Speed Data Transmission: A typical signal rate of 5 Megabaud (Mbd) enables its use in fast digital communication links, microprocessor system interfaces, and computer peripheral interfaces where timing is critical.
• Excellent Noise Immunity: A minimum Common Mode Transient Immunity (CMTI) of 1kV/μs ensures reliable operation in electrically noisy environments, such as industrial controls and motor drives, by rejecting fast voltage transients between the input and output grounds.
• Low Input Drive Requirement: An input threshold current of 1.6mA (max) allows direct interfacing with low-power logic families like LSTTL and CMOS, simplifying driver circuit design and reducing system power consumption.
• Robust Isolation: A high isolation voltage of 5000 V_rms Tsakanin shigarwa da fitarwa yana ba da katanga mai ƙarfi na aminci da kariya ga da'irori masu hankali, mahimmanci ga kayan aikin likita, sarrafa masana'antu, da madaukai na amsawar wutar lantarki.
• Faɗin Kewayon Aiki: Tabbaccen aiki daga -40°C zuwa +85°C da ƙarfin wutar lantarki (V_CC) kewayon daga 4.5V zuwa 20V ya sa ya dace da motoci, masana'antu, da faɗaɗa aikace-aikacen zafin jiki na kasuwanci.

Kasuwonin da aka yi niyya sun haɗa da sarrafa masana'antu, masu sarrafa dabaru da aka tsara (PLCs), tsarin tattara bayanai, direbobin bas ɗin keɓe, kayan aikin likita masu buƙatar keɓewar marasa lafiya, kayan aikin sadarwa, da kowane aikace-aikacen da ke buƙatar kawar da madauki na ƙasa ko keɓewar babban ƙarfin lantarki don siginar dijital.

2. Zurfin Binciken Sigogi na Fasaha

Halayen lantarki da canja wuri na jerin EL220X an ƙayyade su a ƙarƙashin yanayi na T_A = -40°C zuwa 85°C, V_CC = 4.5V zuwa 20V, da takamaiman yanayi na shigarwa/ kunna, tabbatar da aiki mai dogaro a duk faɗin kewayon da aka bayyana.

2.1 Matsakaicin Matsakaici na Cikakke

Waɗannan ƙididdiga suna ayyana iyakokin damuwa waɗanda sama da su lahani na dindindin zai iya faruwa. Ba don ci gaba da aiki ba ne.

• Halin Gaba na Shigarwa (I_F): 50 mA (max). Wannan yana iyakance kololuwar halin yanzu ta cikin LED na ciki.
• Input Reverse Voltage (V_R): 5 V (max). The LED should not be subjected to reverse bias exceeding this value.
• Output Current (I_O): 25 mA (max). The maximum continuous current the output transistor can sink or source.
• Supply/Output Voltage (V_CC, V_O): 20 V (max). The maximum voltage applied to the output side supply pin or the output pin itself.
• Isolation Voltage (V_ISO): 5000 V_rms. This is the hi-pot test voltage for one minute, defining the basic insulation capability between input and output.
• Total Power Dissipation (P_T): 210 mW. The maximum power the entire package can dissipate at 25°C ambient.

2.2 Electrical Characteristics: Input & Output

Input Characteristics:

• Forward Voltage (V_F): Typically 1.4V, with a maximum of 1.8V at I_F=10mA. This parameter is essential for designing the current-limiting resistor for the input LED.
• Temperature Coefficient of V_F: Kusan da kusan -1.8 mV/°C. Ƙarfin gaba na LED yana raguwa yayin da zafin jiki ya karu, wata halayyar diode da aka saba da ita.
• Ƙarfin ƙarfin shigarwa (C_IN): Yawanci 60 pF. Wannan yana shafi amsawar mitar mai girma da buƙatun tuƙi na kewayon shigarwa.

Output & Supply Characteristics:

• Hanyoyin Wadata (I_CCH, I_CCL): The current drawn by the output-side IC. I_CCH (output high) is typically 2.3-3mA, and I_CCL (output low) is typically 3.7-4.5mA, depending on V_CC. These values are critical for system power budget calculations.
• Output Logic Levels:
  • High-Level Output Voltage (V_OH): Minimum of 2.4V when sinking -2.6mA (I_OH). This guarantees compatibility with TTL and CMOS logic high input thresholds.
  • Low-Level Output Voltage (V_OL): Maximum of 0.5V when sourcing 6.4mA (I_OL) at V_CC=4.5V. This ensures a solid logic low state.
• Enable Characteristics (EL2200 only): The three-state enable function has specific voltage (V_EH min 2.0V, V_EL max 0.8V) and current (I_EH, I_EL) requirements for proper control of the high-impedance output state.

2.3 Transfer Characteristics

These parameters define the signal transfer behavior from input to output.

• Input Threshold Current (I_FT): Maximum of 1.6mA. This is the guaranteed current needed at the input LED to force the output to a valid logic low state under specified conditions. It directly relates to the device's sensitivity.
• Input Current Hysteresis (I_HYS): Typically 0.03mA. This built-in hysteresis provides differential mode noise immunity, preventing output chatter when the input signal is near the switching threshold.
• Output Leakage Currents (I_OHH, I_OZL, I_OZH): These are the small currents that flow in the output high state or high-impedance state when the output is off. They are typically in the microamp range but must be considered in high-impedance bus applications.
• Short-Circuit Output Current (I_OSL, I_OSH): The current the output can deliver into a short circuit, typically 25-40mA. This indicates the output stage's robustness but is not a condition for continuous operation.

2.4 Switching Characteristics

Waɗannan sigogi suna ayyana aikin lokaci, mai mahimmanci ga watsa bayanai cikin sauri.

• Propagation Delays (t_PLH, t_PHL): Lokacin daga LED na shigarwa da ya ketare bakin kofa zuwa fitarwa da ya ketare bakin kofar dabaru. Ƙimar yau da kullun sune 100ns (ƙasa-zuwa-sama) da 105ns (sama-zuwa-ƙasa), tare da matsakaicin 300ns. Waɗannan jinkirin suna iyakance matsakaicin ƙimar bayanai da za a iya amfani da su.
• Rise/Fall Times (t_r, t_f): The output signal edge speeds. Typical t_r is 45ns and t_f is 10ns. Faster edges improve signal integrity but may increase EMI.
• Enable/Disable Times (EL2200 only): Parameters like t_PZH, t_PZL, t_PHZ, t_PLZ define how quickly the output enters or leaves the high-impedance state when the enable pin is toggled. These are critical for bus-sharing applications.
• Common Mode Transient Immunity (CM_H, CM_L): Minimum of 1000 V/μs. This quantifies the device's ability to maintain correct output logic states during fast voltage transients between the input and output grounds. The test is performed with |V_CM|=50V.

3. Device Variants and Truth Tables

The EL220X series includes specific variants with different output configurations.

3.1 EL2200 (Three-State Output)

The EL2200 features a three-state (tri-state) output. This allows multiple devices to be connected to a common data bus without contention. The output can be in a logic High, logic Low, or a high-impedance (Z) state. The high-impedance state is controlled by an active-low Enable (E) pin.

Truth Table for EL2200:

Lokacin da Enable ya yi high, ana kashe fitarwa (high-Z) ba tare da la'akari da shigarwa ba. Lokacin da Enable ya yi low, fitarwa tana bin yanayin shigarwa (non-inverting) a hankali.

3.2 EL2201/EL2202 (Standard Output)

EL2201 da EL2202 suna da daidaitaccen fitarwa, koyaushe mai aiki ba tare da ƙugiya ba. Fitarwa kai tsaye tana bin yanayin shigarwa. Bambanci tsakanin EL2201 da EL2202 yawanci yana cikin daidaitawar tashar zuwa tashar ko wasu zaɓuɓɓukan sigogi waɗanda ba a cika bayyana su ba a cikin wannan ɓangaren.

Teburin Gaskiya na EL2201/02:

Aikin canja wuri ba shi da juyawa.

4. Application Suggestions and Design Considerations

4.1 Typical Application Circuits

1. Microprocessor System Interface / Isolated Bus Driver: EL2200 yana dace da wannan. Ana iya haɗa fitarwa na EL2200 da yawa zuwa hanyar sadarwar bayanai na microprocessor. Ana sarrafa fil ɗin Enable na kowane na'ura ta hanyar maɓalli na adireshi. Kawai na'urar da aka zaɓa ce ke tuka bas, yayin da sauran suke cikin yanayin high-Z, yana hana takaddamar bas.

2. Ground Loop Elimination in Data Transmission: Lokacin aika siginar dijital (misali, RS-232, RS-485 siginar sarrafawa) tsakanin tsarin da ke da yuwuwar ƙasa daban-daban, EL220X yana karya haɗin galvanic, yana hana igiyoyin madauki na ƙasa waɗanda ke haifar da amo da kurakurai. Babban CMTI ɗinsa yana sarrafa canjin ƙasa.

3. Pulse Transformer Replacement: A cikin madaukai na amsawa na wutar lantarki mai sauya ko da'irori na tuƙi na ƙofar, EL220X na iya maye gurbin ƙananan masu canza bugun jini. Yana ba da fa'idodi kamar ƙira mafi sauƙi (babu damuwa game da jikewar canzawa, direba mafi sauƙi), ingantaccen kwanciyar hankali akan zafin jiki, da yuwuwar farashi mafi ƙasa.

4.2 Critical Design Considerations

• Input Current Limiting Resistor (R_LIM): This is the most critical external component. It must be calculated based on the forward voltage (V_F) of the LED, the drive voltage (V_DRIVE), and the desired forward current (I_F). I_F must be greater than I_FT (1.6mA max) for a guaranteed low output but should not exceed the Absolute Maximum Rating.
  Formula: R_LIM = (V_DRIVE - V_F) / I_F
  Example: For V_DRIVE=5V, V_F=1.4V, and I_F=5mA, R_LIM = (5 - 1.4) / 0.005 = 720Ω. Use a standard 680Ω or 750Ω resistor.
• Power Supply Decoupling: A bypass capacitor (typically 0.1µF ceramic) should be placed as close as possible between the V_CC and GND pins on the output side to minimize noise and ensure stable switching.
• Output Loading: Ensure the connected load does not require more sink/source current (I_OL/I_OH) than specified. For heavy loads, an external buffer may be needed. The sum of I_CC and the load current must be considered for the output side power supply.
• Enable Pin Handling (EL2200): The Enable pin must not be left floating. It should be tied to V_CC (via a resistor if necessary) to disable the output, or actively driven by control logic.
• PCB Layout for High CMTI: Don riƙe babban ƙimar CMTI, ƙara nisa na creepage da clearance akan PCB tsakanin sassan shigarwa da fitarwa. Guji gudanar da shigarwa da fitarwa a layi daya ko kusa da juna. Yi amfani da rami ko shinge a cikin PCB idan ya cancanta.

5. Mechanical, Packaging, and Assembly

5.1 Package Information

Na'urar tana cikin daidaitaccen kunshin DIP mai fil 8. Cikakkun ma'auni na jiki, tazarar jagora, da farantin zama ya kamata a samu daga cikakken zanen injiniya (ba a cika bayar da shi a cikin wannan ɓangaren ba). Muhimman abubuwa sun haɗa da:

• Daidaitaccen tazarar fil DIP: 2.54mm (0.1") tsakanin filaye a jere, da 7.62mm (0.3") tsakanin layuka.
• Kunshin yana samuwa a cikin salon through-hole da SMD.
• Polarity is indicated by a notch or dot at the end of the package corresponding to pin 1.

5.2 Soldering and Handling

• Soldering Temperature: The absolute maximum soldering temperature is 260°C. This refers to the peak temperature experienced by the package body during reflow or wave soldering processes.
• ESD Precautions: Photocouplers contain sensitive semiconductor junctions. Standard ESD (Electrostatic Discharge) handling procedures should be followed during assembly and handling.
• Storage Conditions: The storage temperature range is -55°C to +125°C. Devices should be stored in a dry, anti-static environment.

6. Technical Comparison and FAQs

6.1 Differentiation from Other Photocouplers

The EL220X series differentiates itself in the photocoupler market through its specific combination of attributes:

• vs. Standard Transistor-Output Optocouplers (e.g., 4N25): The EL220X is significantly faster (5Mbd vs. ~100kbd), has a defined logic output stage (vs. an analog transistor), and features much higher CMTI. It is designed for digital signals, not analog isolation.
• vs. Other High-Speed Logic Gate Optocouplers: Its competitive advantages include the very low 1.6mA input threshold current, which reduces driver burden, and the availability of a three-state version (EL2200) for bus applications, which is not common in all families.
• vs. Digital Isolators (Silicon-based): Digital isolators use capacitive or magnetic coupling and can achieve much higher speeds (e.g., 100Mbps+). However, optocouplers like the EL220X offer superior isolation voltage (5000Vrms vs. typically 2500-5000V_RMS for many digital isolators) and have a long-proven reliability record in high-noise, high-voltage environments. The choice depends on the required speed, isolation strength, and cost targets.

6.2 Frequently Asked Questions (Based on Parameters)

Q: What is the maximum data rate I can achieve with this device?
A: The typical signal rate is 5 Megabaud. The maximum practical data rate is limited by the propagation delays and rise/fall times. For a non-return-to-zero (NRZ) signal, a conservative estimate for the maximum frequency is 1/(2 * t_PLH). Yana amfani da t na yau da kullun_PLH na 100ns, wannan yana nuna matsakaicin mitar kusan 5 MHz, wanda ya dace da ƙimar 5 Mbd. Don aiki mai dogaro, ƙira tare da matsakaicin jinkirin da aka ƙayyade (300ns).

Q: Ta yaya zan yi amfani da aikin jiha uku na EL2200?
A> Connect the Enable (E) pin to your system's control logic. Drive it high (>\u20092.0V) to place the output in a high-impedance state, effectively disconnecting it from the bus or line. Drive it low (<\u20090.8V) to enable the output, allowing it to actively drive High or Low based on the input LED state. Never leave the pin unconnected.

Q: Takardar bayanan ta ambaci "hysteresis." Wane ma'ana wannan yake ga ƙirar ta?
A: Hysteresis na shigarwar yanzu yana nufin yanzun da ake buƙata don kunna fitarwa (I_FT) ya ɗan fi girma fiye da yanzun da yake kashewa. Wannan yana haifar da gefen amo. Idan siginar shigarwar ku tana da gefuna masu jinkiri ko amo a kan ta, hysteresis yana hana fitarwa daga jujjuyawa ko yin hira yayin da shigarwar ke wucewa ta bakin kofa, yana tabbatar da sauƙin canjin dijital.

Q: Zan iya amfani da wannan na'urar don ware siginoyin analog?
A: A'a, EL220X musamman ƙofar dabaru photocoupler. Fitowarsa matakin dabaru ne na dijital (High/Low/Z), ba wakilcin layi na igiyar LED shigarwa ba. Don ware siginar analog, ya kamata a yi amfani da mai haɗin gani na layi (mai fitar da phototransistor ko photodiode wanda ke aiki a yankinsa na layi) ko kuma amplifier warewa.

7. Operational Principle and Trends

7.1 Basic Operating Principle

Aikin ya dogara ne akan jujjuyawar haske da lantarki. Wani igiyar lantarki da aka yi amfani da shi a gefen shigarwa yana sa Infrared Emitting Diode (IRED) ya fitar da haske. Wannan hasken yana ratsa wani shinge na warewa mai gani a cikin kunshin. A gefen fitarwa, mai gano hoton silicon (yawanci photodiode da aka haɗa tare da IC gyara sigina) yana canza hasken da aka karɓa zuwa igiyar lantarki. Wannan igiyar hoto ana sarrafa ta ta hanyar kwatancen sauri ko da'irar dabaru tare da hysteresis don samar da tsaftataccen siginar fitarwa na dijital marar amo wanda ke kwafin yanayin dabaru na shigarwa. Mahimmin abu shine cewa ana watsa siginar ta hanyar haske, yana samar da warewar galvanic tsakanin da'irorin lantarki guda biyu.

7.2 Trends na Masana'antu

Teknolojia ya Photocoupler inaendelea kubadilika. Mienendo inayohusiana na vifaa kama EL220X ni pamoja na:

• Kasi ya Juu Zaidi: Mahitaji ya kutenganisha data kwa kasi katika mifumo ya Ethernet ya viwanda, madereva ya servo, na mifumo ya nishati mbadala yanasisitiza kwa photocouplers zenye viwango vya zaidi ya 10 Mbd na hata kufikia safu ya 25-50 Mbd.
• Matumizi ya Nishati ya Chini: Kupunguza I_F na I_CC ni lengo la kila wakati kukidhi mahitaji ya vifaa vinavyobebeka na vinavyotumia nishati kwa ufanisi.
• Ujumuishaji Ulioimarishwa: Combining multiple isolated channels in a single package (dual, quad) or integrating additional functions like fail-safe outputs or I2C isolation is becoming more common.
• Package Miniaturization: The move towards smaller, surface-mount packages like SOIC-8 and even smaller footprints to save board space in compact designs.
• Improved Reliability and Longevity: Focus on extending the operational lifetime, especially the LED's longevity, under high-temperature and continuous operation conditions.

The EL220X series, with its balanced set of speed, low input current, and robust isolation, occupies a well-established position in this evolving landscape, serving applications where its specific performance envelope is optimal.