NVT210 1 C Temperature Monitor with Series Resistance Cancellation The NVT210 is a dual-channel digital thermometer and undertemperature/overtemperature alarm, intended for use in thermal www.onsemi.com management systems. It is register-compatible with the NCT1008 and NCT72. A feature of the NVT210 is series resistance cancellation, where up to 1.5 k (typical) of resistance in series with the temperature monitoring diode can be automatically cancelled from the temperature result, allowing noise filtering. The NVT210 has a configurable ALERT MSOP8 WDFN8 output and an extended, switchable temperature measurement range. DM SUFFIX MT SUFFIX The NVT210 can measure the temperature of a remote thermal diode CASE 846A CASE 511AT accurate to 1C and the ambient temperature accurate to 3C. The temperature measurement range defaults to 0C to +127C, compatible PIN ASSIGNMENT with the NCT1008 and NCT72, but it can be switched to a wider measurement range of 64C to +191C. 1 The NVT210 communicates over a 2-wire serial interface, V SCLK DD 2 compatible with system management bus (SMBus/I C) standards. The D+ SDATA 2 default SMBus/I C address of the NVT210 is 0x4C. An NVT210D is ALERT/ D 2 THERM2 available with an SMBus/I C address of 0x4D. This is useful if more THERM GND 2 than one NVT210 is used on the same SMBus/I C. An ALERT output signals when the on-chip or remote temperature is (Top View) out of range. The THERM output is a comparator output that allows on/off control of a cooling fan. The ALERT output can be reconfigured MARKING DIAGRAMS as a second THERM output, if required. The NVT210 has been through Automotive Qualification according to 8 AECQ100 Grade 1 standards. XXXX Features AYW On-chip and Remote Temperature Sensor 1 0.25C Resolution/1C Accuracy on Remote Channel MSOP8 1C Resolution/1C Accuracy on Local Channel XXXX = Specific Device Code Series Resistance Cancellation Up to 1.5 k A = Assembly Location Extended, Switchable Temperature Measurement Range Y = Year 0C to +127C (Default) or 64C to +191C W = Work Week = Pb-Free Package Register-compatible with NCT1008 and NCT72 (Note: Microdot may be in either location) 2 2-wire SMBus/I C Serial Interface with SMBus Alert Support Programmable Over/Undertemperature Limits 1 Offset Registers for System Calibration VxM Up to Two Overtemperature Fail-safe THERM Outputs WDFN8 8-lead MSOP Package and a 2 2 WDFN8 Package 240 A Operating Current, 5 A Standby Current Vx = Device Code (Where x = C or D) M = Date Code Automotive Qualification According to AECQ100, Grade 1 = Pb-Free Package Pb-Free Packages are Available (Note: Microdot may be in either location) Applications ORDERING INFORMATION Automotive See detailed ordering and shipping information in the package Embedded Systems dimensions section on page 18 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: May, 2015 Rev. 8 NVT210/DNVT210 CONVERSION RATE ON-CHIP ADDRESS POINTER REGISTER TEMPERATURE REGISTER SENSOR LOCAL TEMPERATURE LOCAL TEMPERATURE VALUE REGISTER LOW-LIMIT REGISTER LOCAL TEMPERATURE D+ 2 HIGH-LIMIT REGISTER ANALOG A-TO-D MUX CONVERTER REMOTE TEMPERATURE D 3 LOW-LIMIT REGISTER BUSY RUN/STANDBY REMOTE TEMPERATURE REMOTE TEMPERATURE HIGH-LIMIT REGISTER VALUE REGISTER LOCAL THERM LIMIT REGISTERS REMOTE OFFSET EXTERNAL THERM REGISTER LIMIT REGISTERS CONFIGURATION REGISTERS EXTERNAL DIODE OPEN-CIRCUIT INTERRUPT STATUS REGISTER MASKING NVT210 2 SMBus/I C INTERFACE 1 5 7 8 4 6 V GND SDATA SCLK THERM ALERT/THERM2 DD Figure 1. Functional Block Diagram Table 1. PIN ASSIGNMENT Pin No. Mnemonic Description 1 V Positive Supply, 2.8 V to 3.6 V. DD 2 D+ Positive Connection to Remote Temperature Sensor. 3 D Negative Connection to Remote Temperature Sensor. 4 THERM Open-drain Output. Can be used as an overtemperature shutdown pin. Requires pullup resistor. 5 GND Supply Ground Connection. 6 ALERT/THERM2 Open-drain Logic Output Used as Interrupt or SMBus ALERT. This can also be configured as a second THERM output. Requires pullup resistor to V . DD 2 7 SDATA Logic Input/Output, SMBus/I C Serial Data. Open-drain Output. Requires pullup resistor. 2 8 SCLK Logic Input, SMBus/I C Serial Clock. Requires pullup resistor. Table 2. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit Positive Supply Voltage (V ) to GND 0.3, +3.6 V DD D+ 0.3 to V + 0.3 V DD D to GND 0.3 to +0.6 V SCLK, SDATA, ALERT, THERM 0.3 to +3.6 V Input Current, SDATA, THERM 1, +50 mA Input Current, D 1 mA ESD Rating, All Pins (Human Body Model) 1,500 V Maximum Junction Temperature (T ) 150 C J MAX Storage Temperature Range 65 to +150 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. NOTE: This device is ESD sensitive. Use standard ESD precautions when handling. www.onsemi.com 2 DIGITAL MUX LIMIT COMPARATOR DIGITAL MUX