DS2777G+T&R Maxim Integrated Products, DS2777G+T&R Datasheet
DS2777G+T&R
Specifications of DS2777G+T&R
Related parts for DS2777G+T&R
DS2777G+T&R Summary of contents
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... Commercial and Military Radios Portable Medical Equipment Selector Guide appears at end of data sheet. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication ABSOLUTE MAXIMUM RATINGS Voltage Range on PLS, CP, CC, DC Pins Relative to V .....................................................-0.3V to +18V SS Voltage Range SRC Pins ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication ELECTRICAL CHARACTERISTICS (continued +4.0V to +9.2V -20°C to +70°C, unless otherwise noted. Typical values are PARAMETER SYMBOL DQ, PIO, SDA Output ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication EEPROM RELIABILITY SPECIFICATION (V = +4.0V to +9.2V -20°C to +70°C, unless otherwise noted PARAMETER SYMBOL EEPROM Copy Time EEPROM Copy Endurance ELECTRICAL CHARACTERISTICS: 1-Wire ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication ELECTRICAL CHARACTERISTICS: 2-WIRE INTERFACE (DS2777/DS2778 ONLY +4.0V to +9.2V -20°C to +70°C PARAMETER SYMBOL SCL Clock Frequency Bus-Free Time Between a STOP and ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication (T = +25°C, unless otherwise noted.) A DISCHARGE-OVERCURRENT PROTECTION DELAY 2V/div 0V 2V/div 0V 1V/div 0V 20mV/div TIME (ms) DC ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication (T = +25°C, unless otherwise noted.) A CURRENT MEASUREMENT ACCURACY 125 75 -20°C +25°C 25 -25 +70°C -75 -125 -0.052 -0.032 -0.012 0.008 0.028 0.048 V (mV) SNS _______________________________________________________________________________________ ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication PIN NAME 1 CC Charge Control. Charge FET control output Chip-Supply Input. Bypass with 0.1μ Discharge Control. Discharge FET control output. Battery ...
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... Protector and Optional SHA-1 Authentication Li+ PLS PROTECTOR CC FET DRIVERS DC CP CHARGE V DD PUMP VOLTAGE REGULATOR VB VB INTERNAL FuelPack is a trademark of Maxim Integrated Products, Inc. _______________________________________________________________________________________ VOLTAGE POWER-MODE CONTROL TEMPERATURE CURRENT PRECISION ANALOG FuelPack™ OSCILLATOR ALGORITHM CONTROL AND STATUS REGISTERS PIO LOGIC 32-BYTE PARAMETER ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication PK+ 150Ω DATA 5.1V 0.1μF PK- PK+ 150Ω SDA SCL 150Ω 5.1V 5.1V PK- 10 ______________________________________________________________________________________ DS2775/DS2776 Typical Application Circuit 1kΩ 1kΩ 1kΩ CC SRC DC PLS V DD ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Detailed Description The DS2775–DS2778 function as an accurate fuel gauge, Li+ protector, and SHA-1-based authentication token (SHA-1-based authentication available only on the DS2776/DS2778). The fuel gauge provides accu- rate ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication ACTIVE RISING EDGE ON DQ PMOD = 0 UVEN = 0 CHARGER DETECT PULL DQ LOW ACTIVE < V IN1 IN2 UV PMOD = 0 UVEN ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Table 1. Li+ Protection Conditions and DS2775/DS2776 Responses CONDITION THRESHOLD Overvoltage (OV) (Note 1) V CELL Undervoltage (UV) (Note 1) V CELL Overcurrent, Charge (COC) V SNS Overcurrent, Discharge ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Undervoltage (UV) If the average of the voltages drops below the undervoltage threshold, IN1 for a period longer than undervoltage ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Temperature Measurement The DS2775–DS2778 use an integrated temperature sensor to measure battery temperature with a resolution of 0.125°C. Temperature measurements are updated every 440ms and placed in the Temperature ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Current Offset Correction Every 1024th conversion, the ADC measures its input offset to facilitate offset correction. Offset correction occurs approximately once per hour. The resulting cor- rection factor is ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication FRSGAIN value is provided to preserve the factory cali- bration value only and is not used to calibrate the current measurement. The 16-bit FRSGAIN value is readable from addresses ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Accumulation Bias In some designs a systematic error or an application preference requires the application of an arbitrary bias to the current accumulation process. The Current Accumulation Bias register ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication VOLTAGE (R) TEMPERATURE (R) CURRENT (R) ACCUMULATED CURRENT (ACR) (RW) AVERAGE CURRENT (R) CELL MODEL PARAMETERS (EEPROM) AGING CAPACITY (AC) (2 BYTES EE) AGE SCALAR (AS) (1 BYTE EE) ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication SEGMENT 1 100% DERIVATIVE (ppm/°C) Figure 14. Cell Model Example Diagram read from the Current register. The specified minimum voltage, or active-empty voltage (VAE), should be a 110ms average ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication -10 full with a resolution Standby empty at +40°C is, by definition, zero and therefore no storage is required. The slopes (derivatives) of the four segments ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Minimum Charge Current (IMIN) IMIN stores the charge-current threshold used to detect a fully charged state stored as a 1-byte value with units of 50µV (IMIN x ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication count-based estimation is reset after a learn cycle. The cycle-count-based estimation is used only in the absence of a learn cycle. ACR Housekeeping The ACR value is adjusted occasionally ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication MSB—ADDRESS 02h MSb Figure 16. Remaining Active Absolute Capacity (RAAC) [mAh] The RAAC register reports the capacity available under ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The Protection register reports events detected by the Li+ safety circuit on bits [3:2]. Bits 0 and 1 are used to disable the charge and discharge FET gate drivers. ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The Status register contains bits that report the device status. All bits are set internally. The CHGTF, AEF, SEF, and LEARNF bits are read-only. BIT 7 BIT 6 BIT ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication All Control register bits are read and write accessible. The Control register is recalled from parameter EEPROM memory at power-up. Register bit values can be modified in shadow RAM ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The 8-bit Overvoltage Threshold register (VOV) sets the overvoltage threshold for the protection circuitry. An over- voltage condition is detected if either of the voltages on V the VOV ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The overcurrent thresholds are set in the upper nibble of the RSGAIN register. The OC1 and OC0 bits set the over- current thresholds for the charge and discharge thresholds. ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The EEPROM register provides access control of the EEPROM blocks. EEPROM blocks can be locked to prevent alteration of data within the block. Locking a block disables write access ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication The DS2775–DS2778 have a 256-byte linear memory space with registers for instrumentation, status, and control, as well as EEPROM memory blocks to store parameters and user information. Byte addresses ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Table 8. Parameter EEPROM Memory Block ADDRESS DESCRIPTION (HEX) 60h Control Register 61h Accumulation Bias Register (AB) 62h Aging Capacity Register MSB (AC) 63h Aging Capacity Register LSB (AC) ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Table 9. Memory Map (continued) ADDRESS (HEX) 13h Accumulated Current Register LSB - 2 14h Age Scalar Register 15h Special Feature Register 16h Full Register MSB 17h Full Register ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Challenge command. The host then issues the Compute MAC or Compute MAC with ROM ID command. The MAC is computed per FIPS 180, and then returned as a 160-bit ...
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... CRC value from the first 56 bits of the address and compare it to the CRC from the DS2775/DS2776. MSb Figure 23. 1-Wire CRC Generation Block Diagram iButton is a registered trademark of Maxim Integrated Products, Inc. ______________________________________________________________________________________ HEX 5Ah Clears the 64-bit secret to 0000 0000 0000 0000h. ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication also used to provide verification of error-free data trans- fer as each EEPROM page is sent to the master during a Read Data/Generate CRC command and for the 8 ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Match Net Address [55h] This command allows the bus master to specifically address one DS2775/DS2776 on the 1-Wire bus. Only the addressed DS2775/DS2776 responds to any sub- sequent function ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication register, address 1Fh, bit the LOCK bit setting the LOCK bit to 1 does not immediately precede the Lock command, ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication 1-Wire SKIP-ROM RESET COMMAND PRESENCE COMPUTE PULSE MAC COMMAND Figure 25. Compute MAC Command 1-Wire SKIP-ROM RESET COMMAND PRESENCE COMPUTE PULSE NEXT SECRET COMMAND Figure 26. Compute Next Secret ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication 1-Wire SKIP-ROM RESET COMMAND PRESENCE PULSE Figure 28. Clear/Lock Secret, Set/Clear Overdrive Commands DQ LINE TYPE LEGEND: Figure 29. 1-Wire Initialization Sequence 1-Wire Signaling The 1-Wire bus requires strict ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Write Time Slots A write time slot is initiated when the bus master pulls the 1-Wire bus from a logic-high (inactive) level to a logic-low level. There are two ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication V PULLUP GND MIN MODE: 15μs 15μs STANDARD 2μs OVERDRIVE t RDV V PULLUP GND MODE: 15μs STANDARD 2μs OVERDRIVE LINE TYPE LEGEND: Figure 30. 1-Wire Write and Read ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication A byte of data consists of 8 bits ordered MSb first. The LSb of each byte is followed by the acknowledge bit. The DS2777/DS2778 registers composed of multibyte values ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Table 14. 2-Wire Protocol Key KEY S START Bit SAddr Slave Address (7-bit) FCmd Function Command Byte MAddr Memory Address Byte Data Data Byte Written by Master A Acknowledge ...
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Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication Table 15. Function Commands TARGET FUNCTION FCmd EEPROM COMMAND VALUE BLOCK 0 42h Copy Data 1 44h 0 B2h Recall Data 1 B4h 0 63h Lock 1 66h Read ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 46 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...