DS1922T-F5 MAXIM [Maxim Integrated Products], DS1922T-F5 Datasheet

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... Industrial Temperature Monitoring) ORDERING INFORMATION PART TEMP RANGE DS1922L-F5 -40°C to +85°C DS1922T-F5 0°C to +125°C See page 12 for Common iButton Features and Examples of Accessories. Commands, Registers, and Modes are capitalized for clarity. iButton and 1-Wire are registered trademarks of Dallas Semiconductor, Corp ...

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... ABSOLUTE MAXIMUM RATINGS I/O Voltage to GND I/O Sink Current Operating Temperature Range (DS1922L) Operating Temperature Range (DS1922T) Junction Temperature Storage Temperature Range (DS1922L) Storage Temperature Range (DS1922T) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied ...

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... OVERDRIVE SPEED MAX MIN MAX (undef.) 7µs (undef.) (undef.) 48µs 80µs 60µs 2µs 6µs 240µs 8µs 24µs 120µs 6µs 16µ DS1922L/DS1922T 15 - δ 5 1.95 - δ δ δ t 1.95 RL See RTC Accuracy Graphs -300 -600 30 240 130 See Temperature Accuracy Graphs ...

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... Entity Concept for use in Class I, Division 1, Group and D Locations. Every 3 Min. Every 10 Min. No Samples Osc. Off Every 3 Min. Every 10 Min. Every 60 Min. Every 300 Min. Osc. Off DS1922L/DS1922T th Edit.); Intrinsically Safe Apparatus ...

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... DS1922L: Temperature (°C) Every Second Every 30 Sec. 100 -40 -30 -20 -10 DS1922L: Temperature (°C) Every 3 Sec. Every 10 Sec. Every 60 Sec Every 3 Sec. Every 10 Sec. Every 60 Sec DS1922L/DS1922T ...

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... DS1922T MINIMUM PRODUCT LIFETIME VS. TEMPERATURE, SLOW SAMPLING Every Minute Every 60 Min DS1922T: Temperature (°C) Every Minute Every 30 Min. No Samples DS1922T: Temperature (°C) Every 3 Min. Every 10 Min. No Samples Osc ...

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... DS1922T MINIMUM PRODUCT LIFETIME VS. TEMPERATURE, FAST SAMPLING Every Second Every 30 Sec. 350 300 250 200 150 100 DS1922T: Temperature (°C) Every Second Every 30 Sec. 100 DS1922T: Temperature (°C) Every 3 Sec. Every 10 Sec. Every 60 Sec. ...

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... DS1922L MINIMUM PRODUCT LIFETIME VS. SAMPLE RATE -40° 0.1 0.01 0.01 0.1 DS1922L: Minutes between Samples -40° 0.1 0.01 0.001 0.01 0.1 DS1922L: Minutes between Samples 0°C 40°C 60°C 1 0°C 40°C 60° DS1922L/DS1922T 75°C 85°C 10 100 75°C 85°C 10 100 ...

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... DS1922T MINIMUM PRODUCT LIFETIME VS. SAMPLE RATE 0°C 95° 0.1 0.01 0.01 0.1 DS1922T: Minutes between Samples 0°C 95° 0.1 0.01 0.001 0.01 DS1922T: Minutes between Samples 40°C 60°C 75°C 110°C 125°C 1 40°C 60°C 75°C 110°C 125°C 0 DS1922L/DS1922T 85°C 10 100 85° ...

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... DS1922L TEMPERATURE ACCURACY Uncorrected Max Error SW Corrected Max Error 2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 -40 -30 -20 -10 NOTE: The graphs are based on 11-bit data. DS1922T TEMPERATURE ACCURACY Uncorrected Max Error SW Corrected Max Error 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 -2 NOTE: The graphs are based on 11-bit data. Uncorrected Min Error SW Corrected Min Error ...

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... DS1922L RTC ACCURACY (TYPICAL) 2.0 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 -40 -30 -20 -10 DS1922T RTC ACCURACY (TYPICAL) 2.0 0.0 -2.0 -4.0 -6.0 -8.0 -10.0 -12 Temperature (° 100 110 120 Temperature (° DS1922L/DS1922T 70 80 ...

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... With its shifted temperature range, the DS1922T is suited to monitor processes that require temperatures close to the boiling point of water, such as pasteurization of food items. Note that the initial sealing level of DS1922L/T achieves IP56 ...

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... Function Control Internal Timekeeping & Control Reg. & Counters ADC Sense Control Logic Additional information about the Dallas 1-Wire Cyclic Redundancy DS1922L/DS1922T 64-Bit Parasite Lasered Powered ROM Circuitry Memory 256-Bit Function Scratchpad Control General-Purpose SRAM (512 Bytes) Register Pages ...

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... STAGE STAGE STAGE STAGE 1-Wire net DS1922L, DS1922T Available Commands: Read ROM Match ROM Search ROM Conditional Search ROM Skip ROM Resume Overdrive Skip Overdrive Match Write Scratchpad Read Scratchpad Copy Scratchpad w/PW Read Memory w/PW & w/CRC ...

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... Register Page 2 023FH 0240H to Calibration Memory Page 1 (R/W) 025FH 0260H to Calibration Memory Page 2 (R/W) 027FH 0280H to (Reserved For Future Extensions) 0FFFH 1000H to Datalog Memory (Read-Only) 2FFFH Page 0 Pages Page 16 Page 17 Page 18 Page 19 Pages 20 to 127 Pages 128 to 383 DS1922L/DS1922T ...

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... Low Byte Center Byte High Byte Low Byte Center Byte High Byte Configuration Code EPW First Byte … Eighth Byte First Byte … Eighth Byte DS1922L/DS1922T b1 b0 Function Access* Real- Time Clock Registers Sample Rate Temp. Alarms (N/ Latest Temp ...

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... TEMPERATURE CONVERSION The DS1922L measures temperatures in the range of -40°C to +85°C. With the DS1922T the temperature range begins at 0°C and ends at +125°C. Temperature values are represented 16-bit unsigned binary number with a resolution of 0.5°C in the 8-bit mode and 0.0625°C in the 16-bit mode. ...

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... TRH This equation is valid for converting temperature readings stored in the datalog memory as well as for data read from the Latest Temperature Conversion Result Register. The "-41" applies to the DS1922L. For the DS1922T use "-1" instead of "-41". To specify the temperature alarm thresholds, the equation above needs to be resolved to TALM = 2 * ϑ ...

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... During a mission, there is only read access to this register. Bits 6 and 7 have no function. They always read 1 and cannot be written to 0. Bits 1 and 3 control functions that are not available with the DS1922L and DS1922T. Bit 1 must be set to 0. Under this condition the setting of bit 3 becomes a “don’t care”. ...

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... There is only read access to this register. Bits have no function. They always read 1. Bits 2 and 3 have no function with the DS1922L and DS1922T. They always read 0. The alarm status bits are cleared simultaneously when the Clear Memory function is invoked. See Memory and Control Functions for details. ...

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... To clear WFTA manually before starting a new mission, set the high temperature alarm (address 0209h) to -40°C and perform a forced conversion Delay Low Byte Delay Center Byte Delay High Byte DS1922L/DS1922T b1 b0 MIP 0 DEFINITION b1 b0 ...

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... DS1922 iButtons. The table below shows the codes assigned to the various devices 10s Single Seconds Single Minutes 20hr 10hr Single Hours 10 Date Single Date 0 10m. Single Months Single Years Low Byte Center Byte High Byte Low Byte Center Byte High Byte DS1922L/DS1922T ...

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... RP58 FP5 FP4 FP3 FP2 FP13 FP12 FP11 FP10 — FP53 FP52 FP51 FP50 FP61 FP60 FP59 FP58 DS1922L/DS1922T RP1 RP0 RP9 RP8 — RP49 RP48 RP57 RP56 b1 b0 FP1 FP0 FP9 FP8 — FP49 FP48 ...

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... Earlier measurements cannot be reconstructed. Figure 7. Temperature Logging ETL = 1 TLFS = 0 1000h 8192 8-Bit Entries Temperature 2FFFh ETL = 1 TLFS = 1 1000h With 16-bit format, 4096 the most-significant 16-Bit Entries byte is stored at the Temperature lower address. 2FFFh DS1922L/DS1922T ...

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... Sample Rate Register and the EHSS bit. Note that for version AX devices, the start of the temperature logging mission may be delayed based on a residual countdown value left from a previous mission. Please see Application Note 3429, “Datalogger Start Delay Issue in DS2422, DS1923, DS1922L, and DS1922T” for a detailed explanation and workaround. ...

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... As soon as the DS1922L/T has received these bytes, it copies the data to the requested location beginning at the target address T14 T13 T12 T11 DS1922L/DS1922T T10 ...

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... Write Scratchpad command. With suitable password, the copy scratchpad always functions for the 16 pages of data memory and the 2 pages of calibration memory. While a mission is in progress, write attempts to the register pages are not successful. The AA bit (Authorization Accepted) remaining at 0 indicates this DS1922L/DS1922T ...

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... Flow Chart (Figure 11) 0FH DS1922 Incre- N ments Scratch- pad Offset Y Partial Y Byte Written DS1922L/DS1922T To Figure Part AAH N Read Scratchpad Y Master RX TA1 (T7:T0) Master RX TA2 (T15:T8) Master RX Ending Offset with Data Status (E/S) DS1922 sets Scratch- pad Offset = (T4:T0) ...

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... Code Match DS1922 Copies Scratchpad Data to Memory Master RX "1"s Copying Finished N Y DS1922 TX "0" Y Master TX Reset? N DS1922 TX "1" Master TX Reset DS1922L/DS1922T To Figure Authorization Code Master RX "1"s N Master TX Reset? Y From Figure Part Part ...

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... TX Reset? N End of Page? Y Master RX CRC16 of Command, Address, Data st (1 Pass); CRC16 of Data (Subsequent Passes) N Master TX CRC OK? Reset Y End of Memory? Y Master TX Reset DS1922L/DS1922T To Figure Part N N DS1922 Incre- ments Address Counter N N Master RX "1"s N From Figure Part ...

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... Samples Counter, Alarm Flags DS1922 sets MEMCLR = 1 N Master TX Reset? To Figure Part 96H DS1922L/DS1922T To Figure Part 55H N Forced Conversion? Y Master TX FFh dummy byte Y Mission in Progress? N DS1922 Performs a Temp. Conversion DS1922 copies Result to Address 020C/Dh ...

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... Temp. Alarm? Y DS1922 sets WFTA=0 DS1922 Waits One Sample Period DS1922 copies RTC Data to Mission Time Stamp Register DS1922 Starts Logging Taking First Sample End Of Process DS1922L/DS1922T 33H Stop Mission [w/PW] Y Master TX 64-Bits [Password] Y Master TX FFh dummy byte Password Accepted? Y Mission in ...

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... If SUTA = 1, the first sample is written to the data log memory at the time the temperature alarm occurred. However, the Mission Sample Counter does not increment. One sample period later, the Mission Time Stamp will be set and the regular sampling and logging begins. While the device DS1922L/DS1922T ...

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... CRC16 at the end of the memory page. Wait 0.5s, 1-Wire reset, address the device, and repeat Stop Mission. Perform a 1-Wire reset, address the device, read the general Status register at address 215h and check the MIP-bit. If the MIP-bit is 0, Stop Mission was successful DS1922L/DS1922T ...

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... The presence pulse lets the bus master know that the DS1922L the bus and is ready to operate. For more details, see the 1-Wire Signaling section. V PUP R PUP DATA 5µA Typ RECEIVE TX = TRANSMIT DS1922L/DS1922T DS1922L/T 1-Wire PORT RX TX 100Ω MOSFET ...

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... ROM code. If more than one slave is present on the bus and, for example, a Read command is issued following the Skip ROM command, data collision will occur on the bus as multiple slaves transmit simultaneously (open-drain pulldowns will produce a wired-AND result DS1922L/DS1922T ...

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... Slaves already in Overdrive mode from a previous Overdrive Skip or successful Overdrive Match command remain in Overdrive mode. All overdrive-capable slaves will return to standard speed at the next reset pulse of minimum 690µs duration. The Overdrive Match ROM command can be used with a single or multiple devices on the bus DS1922L/DS1922T ...

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... Y DS1922 TX Bit 63 DS1922 TX Bit 63 Master TX Bit Bit 63 Bit 63 Match? Match Memory Functions Flow Chart (Figure DS1922L/DS1922T From Figure 11 Figure 11 ECh N Cond. Search Command Condition Met? Y DS1922 TX Bit 0 DS1922 TX Bit 0 Master TX Bit 0 ...

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... Part A5h 3Ch N Resume Overdrive Command? Skip ROM Master TX Reset ? Y Master TX Reset ? DS1922L/DS1922T 69h N Overdrive Match ROM Master TX Bit 0 Y Bit 0 Match Master TX Bit 1 Bit 1 Match? Y Master TX Bit 63 Bit 63 Match? Y ...

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... MSP t t RSTL PDL t PDH MASTER , t , and t PDHMAX PDLMAX RECMIN DS1922L/DS1922T below the threshold get PUP TL . The time it takes for the voltage used and the PUP is no longer than 80µs the device RSTL t REC t RSTH DS1922L/T is crossed, TH ...

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... DS1922L/T needs a recovery TH ε t SLOT MASTER t W0L t SLOT MASTER t MSR Master Sampling Window δ t SLOT MASTER window, when responding with a 0, the DS1922L/T starts pulling the DS1922L/DS1922T threshold before the write-one TH TH ILMAX t REC t REC DS1922L/T until the TL ...

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... FPD HY REH t REH Case DS1922L/DS1922T is expired. This guarantees SLOT . If a negative glitch crosses V TH during which glitches will be ignored, REH < Deep voltage droops or glitches GL REH window cannot be filtered out and REH ≥ ...

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... STAGE STAGE STAGE STAGE STAGE STAGE STAGE DS1922L/DS1922T STAGE STAGE STAGE STAGE INPUT DATA CRC OUTPUT ...

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... Master to slave Slave to master WRITE SCRATCHPAD, REACHING THE END OF THE SCRATCHPAD (CANNOT FAIL) RST PD Select WS READ SCRATCHPAD (CANNOT FAIL) RST PD Select RS COPY SCRATCHPAD WITH PASSWORD (SUCCESS) RST PD Select CPS TA <data to EOS> CRC16\ TA-E/S <data to EOS> CRC16\ TA-E/S <PW/dummy> AA loop DS1922L/DS1922T FF loop FF loop ...

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... To verify success, read the General Status Register at address 0215h. If MIP is 0, the command was executed successfully. TA-E/S <PW/dummy> FF loop TA <PW/dummy> <data to EOP> TA <PW/dummy> FF loop <PW/dummy> FFh FF loop FFh FF loop <PW/dummy> FFh FF loop <PW/dummy> FFh FF loop DS1922L/DS1922T CRC16\ <32 bytes> CRC16\ FF loop Loop ...

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... CCh 96h <8 FFh bytes> FFh (Reset) (Presence) EXAMPLE VALUES of April in 2002 DS1922L/DS1922T COMMENTS Reset pulse Presence pulse Issue “Skip ROM” command Issue “Clear Memory” command Send dummy password Send dummy byte Reset pulse Presence pulse FUNCTION ...

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... TA2 E/S 1Fh <8 FFh bytes> Send dummy password (Reset) Reset pulse (Presence) Presence pulse DS1922L/DS1922T FUNCTION Clock through read-only registers Temperature Alarm Control (Not applicable with DS1922L/T) RTC Oscillator Control, sample rate selection General Mission Control Clock through read-only registers ...

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... Cold reference temperature, high-byte Cold reference temperature, low-byte Conversion result at cold reference temperature, high-byte Conversion result at cold reference temperature, low-byte Hot reference temperature, high-byte Hot reference temperature, low-byte Conversion result at hot reference temperature, high-byte Conversion result at hot reference temperature, low-byte DS1922L/DS1922T COMMENTS ...

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... Tr1 ) * (Tr3 - Tr1) + (Tr3 - Tr1 (convert from binary to °C) (the actual correction) Error values Err2 = 0.0672°C Err3 = -0.1483°C Err1 = 0.0672°C Application of Correction Coefficients to sample reading Tc = 22.500°C Tcorr = 22.647° DS1922L/DS1922T (Tr1 - Tr2)] ...

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... Thermochron in the DS9107 iButton capsule. The DS9107 provides a watertight enclosure that has been rated to IP68 (See ic.com/AN4126). DESCRIPTION www.maxim DS1922L/DS1922T PAGES CHANGED ...