MAX6629MAX6632 12-Bit + Sign Digital Temperature Sensors with Serial Interface General Description Features The MAX6629MAX6632 are local digital temperature Low Power Consumption sensors with an SPI-compatible serial interface. The 32A typ (MAX6631/MAX6632) temperature is converted to a 12-bit + sign word with a 200A typ (MAX6629/MAX6630) resolution of 0.0625C/LSB. An extended temperature 12-Bit + Sign Resolution with 0.0625C/LSB range provides useful readings up to +150C. Accuracy These sensors are 3-wire serial interface SPI compatible, 1C (max) from 0C to +70C allowing the MAX6629MAX6632 to be readily connected +150C Extended Temperature Range to a variety of microcontrollers (Cs). The MAX6629 SPI-Compatible Serial Interface MAX6632 are read-only devices, simplifying their use in systems where only temperature data is required. +3.0V to +5.5V Supply Range All four digital temperature sensors require very little 6-Pin TDFN and SOT23 Packages supply current, making them ideal for portable systems. Lead-Free Version Available (TDFN Package) The MAX6631/MAX6632 perform a temperature-to-digital conversion once every 8s and require minimal average Ordering Information supply current, 32A (typ). The MAX6629/MAX6630 PART TEMP RANGE PIN-PACKAGE perform a conversion once every 0.5s and require only MAX6629MTT+ -55C to +125C 6 TDFN-EP* 200A (typ) supply current. Any of these temperature sensors can perform conversions more oftenup to MAX6629MUT G16 -55C to +125C 6 SOT23 approximately four conversions per second by reading the MAX6630MTT+ -55C to +125C 6 TDFN-EP* conversion results more often. MAX6630MUT G16 -55C to +125C 6 SOT23 Applications MAX6631MTT+ -55C to +125C 6 TDFN-EP* Cellular Industrial Control MAX6632MTT+ -55C to +125C 6 TDFN-EP* Hard Disk Drive Systems HVACs MAX6632MUT G16 -55C to +125C 6 SOT23 +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Typical Application Circuit +3V TO +5.5V Pin Configurations V CC MAX6629 TOP VIEW MAX6630 MAX6631 MAX6632 N.C. 1 6 SO GND 1 6 SO SO 0.1F MAX6629 MAX6630 MAX6631 MAX6632 GND 2 5 CS N.C. 2 5 CS C CS GND V 3 4 SCK CC V 3 4 SCK CC SCK SOT23 SOT23 TDFN TDFN 19-2047 Rev 6 11/16MAX6629MAX6632 12-Bit + Sign Digital Temperature Sensors with Serial Interface Absolute Maximum Ratings All voltages referenced to GND. Junction Temperature......................................................+150C V ...........................................................................-0.3V, +6.0V Operating Temperature Range (Note 1)...........-55C to +150C CC SO, SCK, CS....................................................-0.3V, V + 0.3V Storage Temperature Range.............................-65C to +150C CC SO .......................................................................-1mA to +50mA Lead Temperature (soldering, 10s).................................+300C Current into Any Pin ............................................................10mA Soldering Temperature (reflow) Continuous Power Dissipation (T = +70C) TDFN............................................................................+260C A 6-Pin SOT23 (derate 9.10mW/C above +70C).........727mW SOT23 (Ordering Information contains ).................+245C 6-Pin TDFN (derate 24.4mW/C above +70C).........1951mW SOT23 (Ordering Information contains -)..................+240C Note 1: It is not recommended to operate the device above +125C for extended periods of time. 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. Electrical Characteristics (V = +3.0V to +5.5V, T = -55C to +125C, unless otherwise noted. Typical values are at V = +3.3V and T = +25C.) (Notes CC A CC A 2 and 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TEMPERATURE T = room temp, V = +3.3V -0.8 0.2 +0.8 A CC 0C T +70C, V = +3.3V -1.0 0.2 +1.0 A CC -20C T +85C, V = +3.3V -1.6 +0.3 +1.6 A CC Accuracy -20C T +100C, V = +3.3V -2.3 +0.5 +2.3 C A CC -40C T +125C, V = +3.3V -3.2 +0.8 +3.2 A CC T -55C, V = +3.3V -1.0 +1.5 +3.5 A CC T = +150C, V = +3.3V -5.0 +1.5 +6.5 A CC Power-Supply Sensitivity PSS 0.2 0.6 C/V Resolution 0.0625 C MAX6629, MAX6630, CS high 0.37 0.5 0.65 Time Between Conversion t s SAMPLE Starts MAX6631, MAX6632, CS high 5.9 8 10.5 Conversion Time t 180 250 320 ms CONV POWER SUPPLY Supply Voltage Range V 3.0 5.5 V CC I Shutdown (Note 3), V = +0.8V 5 SD CC Supply Current, SCK Idle I ADC idle (Figure 2), CS = low 6 20 A IDLE I ADC converting (Figure 2) 360 650 CONV MAX6629, MAX6630 200 400 Average Operating Current I A CC MAX6631, MAX6632 32 50 Power-On Reset (POR) V falling 1.6 V CC Threshold Maxim Integrated 2 www.maximintegrated.com