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MAX1497 Scheda tecnica(PDF) 2 Page - Maxim Integrated Products |
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MAX1497 Scheda tecnica(HTML) 2 Page - Maxim Integrated Products |
2 / 33 page 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers and µC Interface 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS 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. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. AVDD to GND (MAX1499).........................................-0.3V to +6V DVDD to GND (MAX1499) ........................................-0.3V to +6V AIN+, AIN- to GND (MAX1499) ...........VNEG to (AVDD to +0.3V) REF+, REF- to GND (MAX1499) ......... VNEG to (AVDD to +0.3V) LOWBATT to GND (MAX1499) ................-0.3V to (AVDD + 0.3V) CLK, EOC, CS, DIN, SCLK, DOUT to GND (MAX1499) .......................-0.3V to (DVDD + 0.3V) VNEG to GND (MAX1499) .......................-2.6V to (AVDD + 0.3V) LED_EN to GND (MAX1499)....................-0.3V to (DVDD + 0.3V) ISET to GND (MAX1499)..........................-0.3V to (AVDD + 0.3V) VDD to GND (MAX1497) ...........................................-0.3V to +6V AIN+, AIN- to GND (MAX1497)..............VNEG to (VDD to +0.3V) REF+, REF- to GND (MAX1497) ........... VNEG to (VDD to +0.3V) CLK, EOC, CS, DIN, SCLK, DOUT to GND (MAX1497)..........................-0.3V to (VDD + 0.3V) VNEG to GND (MAX1497)..........................-2.6V to (VDD + 0.3V) ISET to GND (MAX1497) ............................-0.3V to (VDD + 0.3V) VLED to GLED ..........................................................-0.3V to +6V GLED to GND ........................................................-0.3V to +0.3V SEG_ to GLED..........................................-0.3V to (VLED + 0.3V) DIG_ to GLED ..........................................-0.3V to (VLED + 0.3V) DIG_ Sink Current .............................................................300mA DIG_ Source Current...........................................................50mA SEG_ Sink Current ..............................................................50mA SEG_ Source Current..........................................................50mA Maximum Current Input into Any Other Pin ........................50mA Continuous Power Dissipation (TA = +70°C) 32-Pin TQFP (derate 20.7mW/°C above +70°C).....1652.9mW 28-Pin SSOP (derate 9.5mW/°C above +70°C) ...........762mW 28-Pin PDIP (derate 14.3mW/°C above +70°C)......1142.9mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-60°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C ELECTRICAL CHARACTERISTICS (AVDD = DVDD = VDD = +2.7V to +5.25V, GND = 0, GLED = 0, VLED = +2.7V to +5.25V, VREF+ - VREF- = 2.048V (external reference) CREF+ = CREF- = 0.1µF, CVNEG = 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY MAX1499 -19,999 +19,999 Noise-Free Resolution MAX1497 -1999 +1999 Count 2.000V range ±1 Integral Nonlinearity (Note 1) INL 200mV range ±1 Count Range Change Ratio (VAIN+ - VAIN- = 0.100V) on 200mV range (VAIN+ - VAIN- = 0.100V) on 2.0V range 10:1 Ratio Rollover Error VAIN+ - VAIN- = full scale VAIN- - VAIN+ = full scale ±1 Count Output Noise 10 µVP-P Offset Error (Zero Input Reading) Offset VIN = 0 (Note 2) -0 0 Reading Gain Error (Note 3) -0.5 +0.5 %FSR Offset Drift (Zero Reading Drift) VIN = 0 (Note 4) 0.1 µV/°C Gain Drift ±1 ppm/°C INPUT CONVERSION RATE External-Clock Frequency 4.9152 MHz External-Clock Duty Cycle 40 60 % Internal clock 5 Conversion Rate External clock, fCLK = 4.9152MHz 5 Hz |
Codice articolo simile - MAX1497 |
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Descrizione simile - MAX1497 |
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