Datasheet DS18B20 - 3

link to page 4 DS18B20 Programmable Resolution 1-Wire Digital Thermometer
AC Electrical Characteristics–NV Memory
(-55°C to +125°C; VDD = 3.0V to 5.5V)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
NV Write Cycle Time tWR 2 10 ms EEPROM Writes NEEWR -55°C to +55°C 50k writes EEPROM Data Retention tEEDR -55°C to +55°C 10 years
AC Electrical Characteristics
(-55°C to +125°C; VDD = 3.0V to 5.5V)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
9-bit resolution 93.75 10-bit resolution 187.5 Temperature Conversion Time tCONV (Note 12) ms 11-bit resolution 375 12-bit resolution 750 Time to Strong Pullup On tSPON Start convert T command issued 10 µs Time Slot tSLOT (Note 12) 60 120 µs Recovery Time tREC (Note 12) 1 µs Write 0 Low Time tLOW0 (Note 12) 60 120 µs Write 1 Low Time tLOW1 (Note 12) 1 15 µs Read Data Valid tRDV (Note 12) 15 µs Reset Time High tRSTH (Note 12) 480 µs Reset Time Low tRSTL (Notes 12, 13) 480 µs Presence-Detect High tPDHIGH (Note 12) 15 60 µs Presence-Detect Low tPDLOW (Note 12) 60 240 µs Capacitance CIN/OUT 25 pF
Note 12:
See the timing diagrams in Figure 2.
Note 13:
Under parasite power, if tRSTL > 960µs, a power-on reset can occur.
DS18B20 TYPICAL ERROR CURVE
0.5 0.4 ) 0.3 (°C +3s ERROR 0.2 0.1 0 -0.1 -0.2 -3s ERROR -0.3 THERMOMETER ERROR MEAN ERROR -0.4 -0.5 0 10 20 30 40 50 60 70 TEMPERATURE (°C) Figure 1. Typical Performance Curve www.maximintegrated.com Maxim Integrated │ 3