EVALUATION KIT AVAILABLE MAX31730 3-Channel Remote Temperature Sensor General Description The MAX31730 temperature sensor monitors its own temperature and the temperatures of three external diodeconnected transistors. The operating supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates for high series resistance in circuit-board traces and the external thermal diode, while beta compensation corrects for temperature-measurement errors due to low-beta sensing transistors.
MAX31730 3-Channel Remote Temperature Sensor Absolute Maximum Ratings VDD, SCL, SDA, THERM, ADD.............................-0.3V to +3.7V All Other Pins............................................ -0.3V to (VDD + 0.3V) ESD Protection (All Pins, Human Body Model).....................2kV Continuous Power Dissipation (TA = +70°C) µMAX (derate at 8.8mW/°C above +70°C).............707.30mW TDFN (derate 24.4mW/°C above +70°C)................1951.2mW Operating Temperature Range..........................
MAX31730 3-Channel Remote Temperature Sensor Electrical Characteristics (continued) (3.0V ≤ VDD ≤ 3.6V, TA = -40°C to +125°C, unless otherwise noted) PARAMETER SYMBOL CONDITIONS TA = 0°C to +70°C Local Temperature Accuracy Temperature Hysteresis Conversion Time for All channels IRJ TA = -20°C to +85°C -1.5 +1.5 TA = -40°C to +125°C -2 +2 2 Input Leakage Current Output High Leakage Current °C 100 ms 150 ms 350 ms High level 180 Low level 12 µA 0.3 Beta compensation enabled 0.
MAX31730 3-Channel Remote Temperature Sensor I2C AC Electrical Characteristics (continued) (3.0V ≤ VDD ≤ 3.6V, TA = -40°C to +125°C, timing referenced to VIL(MAX) and VIH(MAX), unless otherwise noted) (Note 6) (Figures 2 and 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Clock Low Period tLOW 10% to 10% 1 µs Clock High Period tHIGH 90% to 90% 1 µs Data-In Hold Time tHD:DAT 0.
MAX31730 3-Channel Remote Temperature Sensor Typical Operating Characteristics (3.0V ≤ VDD ≤ 3.6V, TA = +25°C, unless otherwise noted.) ACTIVE CURRENT vs TEMPERATURE ACTIVE CURRENT (µA) ACTIVE CURRENT (µA) VDD = 3.6V 700 VDD = 3.0V 600 VDD = 3.3V -40 10 BETA COMPENSATION ENABLED; BETA = 0.1 1600 800 500 toc02 1800 BETA COMPENSATION DISABLED 900 400 ACTIVE CURRENT vs TEMPERATURE toc01 1000 1400 VDD = 3.6V 1200 1000 VDD = 3.0V 800 VDD = 3.
MAX31730 3-Channel Remote Temperature Sensor Pin Configurations DXP2 DXP3 9 SDA 8 ADD 4 7 THERM 5 6 GND MAX31730 DXN3 3 SCL GND 2 DXN 10 THERM DXP1 + ADD 1 SDA VDD SCL TOP VIEW TOP VIEW 12 11 10 9 8 7 MA31730 µMAX 4 5 6 DXN2 DXP3 DXP1 3 DXP2 2 DXN1 1 VDD + TDFN 3mm x 3mm Pin Description PIN µMAX TDFN 1 1 2 — 3 2 3 — www.maximintegrated.com NAME VDD FUNCTION Supply Voltage Input. Bypass to GND with a 0.1µF capacitor.
MAX31730 3-Channel Remote Temperature Sensor Pin Description (continued) PIN µMAX 4 — 5 TDFN 4 5 6 NAME FUNCTION DXP2 Combined Current Source and ADC Positive Input for Channel 2 Remote Diode. Connect DXP2 to the anode of a remote-diode-connected, temperature-sensing transistor. Leave DXP2 unconnected or connect to DXN or DXN2 if a remote diode is not used. Connect a capacitor (see the CEXT specification in the Electrical Characteristic table) between DXP2 and DXN or DXN2 for noise filtering.
MAX31730 3-Channel Remote Temperature Sensor Block Diagram VDD DXP1 CURRENT SOURCE MAX31730 DXN1 ALARM THERM DXP2 + DXN2 DXP3 REGISTER BANK ADC MUX - CONFIGURATION BYTES REMOTE TEMPERATURES LOCAL TEMPERATURES REF DXN3 SMBus ALERT THRESHOLD LOCAL TEMPERATURE THERMAL THRESHOLDS ALERT RESPONSE ADDRESS SMBus/I2C INTERFACE SCL Detailed Description The MAX31730 is a precision temperature monitor that features one local and three remote temperature-sensing channels, with programmable temperature
MAX31730 Series-Resistance Cancellation Some thermal diodes on high-power ICs have excessive series resistance that can cause temperature-measurement errors when used with conventional remote temperature sensors. External channels 1–3 of the device have a series-resistance cancellation feature that eliminates the effect of diode series resistance and interconnection resistance. The cancellation range is from 0 to 300Ω. Series-resistance cancellation is always enabled.
MAX31730 3-Channel Remote Temperature Sensor WRITE-BYTE FORMAT S ADDRESS WR ACK REGISTER 7 BITS ACK DATA 8 BITS ACK P 8 BITS SLAVE ADDRESS: EQUIVALENT TO CHIP-SELECT LINE OF A 3-WIRE INTERFACE 1 DATA BYTE: DATA GOES INTO THE REGISTER SET BY THE REGISTER BYTE MULTIPLE WRITE-BYTE FORMAT S ADDRESS WR ACK ACK REGISTER 7 BITS DATA 8 BITS ... DATA ... 8 BITS ACK DATA ... ACK ... 8 BITS ACK 8 BITS ... DATA ...
MAX31730 A 3-Channel Remote Temperature Sensor tLOW B C tHIGH D E F G H I J K L M SCL SDA tSU:STA tHD:STA tSU:STO tSU:DAT tBUF E = SLAVE PULLS SDA LINE LOW F = ACKNOWLEDGE BIT CLOCKED INTO MASTER G = MSB OF DATA CLOCKED INTO SLAVE H = LSB OF DATA CLOCKED INTO SLAVE A = START CONDITION B = MSB OF ADDRESS CLOCKED INTO SLAVE C = LSB OF ADDRESS CLOCKED INTO SLAVE D = R/W BIT CLOCKED INTO SLAVE I = SLAVE PULLS SDA LOW J = ACKNOWLEDGE CLOCKED INTO MASTER K = ACKNOWLEDGE CLOCK PULSE L = STOP
MAX31730 3-Channel Remote Temperature Sensor Comparator Mode Selecting comparator mode in the Configuration register causes the THERM output to assert based on a temperature measurement exceeding a trip threshold value, just as in interrupt mode. However, in comparator mode, the output deasserts automatically when the temperature crosses the threshold back into the acceptable range.
MAX31730 3-Channel Remote Temperature Sensor Temperature Channel Enable Register The Temperature Channel Enable register selects which temperature-sensing channels are enabled. Channels not selected are skipped during the temperature-conversion cycle and diode fault detection is not performed on them.
MAX31730 3-Channel Remote Temperature Sensor Thermal-Limit Registers The Thermal Limit registers (20h through 27h) store overtemperature and undertemperature thermal-threshold values. Access to these registers is provided through the I2C/SMBus-compatible interface. Alarms are masked at power-up. If a threshold is crossed, a bit is set in the Thermal Status registers (40h through 47h) to indicate the thermal fault. The THERM pin is also asserted unless the channel is masked using the THERM Mask register.
MAX31730 3-Channel Remote Temperature Sensor THERM Mask Register The THERM Mask register functions are described in Table 6. Bits [3:0] are used to mask the THERM pin output. Bit 0 masks assertion of THERM due to the local channel thermal faults and the remaining bits mask the remote thermal faults. The power-up state of this register is 0000 0000 (00h). Status Register Functions The status registers indicate temperature or diode fault status.
MAX31730 3-Channel Remote Temperature Sensor Table 7. Thermal High Status Register (32h) BIT NAME POR VALUE 7 (MSB) Reserved 0 Reserved. FUNCTION 6 Reserved 0 Reserved. 5 Reserved 0 Reserved. 4 Reserved 0 Reserved. 3 Remote 3 0 Channel 3 Remote-Diode High Thermal Bit. This bit is set to logic 1 when the channel 3 remote-diode temperature exceeds the threshold in the Remote 3 Thermal High Limit registers. 2 Remote 2 0 Channel 2 Remote-Diode High Thermal Bit.
MAX31730 3-Channel Remote Temperature Sensor Diode Fault Detection If a remote channel’s DXP_ and DXN_ inputs are unconnected or are shorted to each other, to ground, or to the supply voltage, the device detects a diode fault. A diode fault does not cause THERM to assert and does not allow an overtemperature or undertemperature event to be detected for the affected channel.
MAX31730 3-Channel Remote Temperature Sensor Table 9. Custom Ideality Factor Register (14h) (continued) SELECTION (HEX) IDEALITY FACTOR SELECTION (HEX) IDEALITY FACTOR 0x2C 1.0286 0x37 1.0402 0x2D 1.0296 0x38 1.0413 0x2E 1.0307 0x39 1.0424 0x2F 1.0317 0x3A 1.0435 0x30 1.0328 0x3B 1.0445 0x31 1.0338 0x3C 1.0456 0x32 1.0349 0x3D 1.0467 0x33 1.0360 0x3E 1.0478 0x34 1.0370 0x3F 1.0489 0x35 1.0381 ≥ 0x40 Not Valid 0x36 1.0392 Table 10.
MAX31730 3-Channel Remote Temperature Sensor Beta Compensation Beta compensation corrects for errors caused by low beta-sensing transistors. Note: it applies only to PNP transistors with their collectors grounded and their bases and emitters connected to DXN_ and DXP_, respectively (see Figure 4). Select the remote channels for which beta compensation are active using the Beta Compensation Enable register (Table 11).
MAX31730 3-Channel Remote Temperature Sensor Table 12. Beta Compensation Values (Registers 1Ah, 1Bh, and1Ch) (Read Only) VALUE (HEX) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 BETA (MIN) 0 (default) Reserved Reserved Reserved Reserved 0 0 0 0 0.67 1 Reserved Reserved Reserved Reserved 0 0 0 1 0.50 2 Reserved Reserved Reserved Reserved 0 0 1 0 0.36 3 Reserved Reserved Reserved Reserved 0 0 1 1 0.
MAX31730 3-Channel Remote Temperature Sensor Offset Registers If desired, an offset value can be applied to the data in any selected temperature channel. Select the offset value using the Custom Offset register (Table 14). The resolution of the custom offset value is 0.125°C, and the MSB is 16°C. The temperature offset is calculated using the following equation: -14.875°C + b[7:0]/8 = Temperature Offset The resulting offset range is -14.875°C to +17°C.
MAX31730 3-Channel Remote Temperature Sensor Register Map ADDRESS (HEX) POR VALUE (HEX) READ/ WRITE Local Temperature MSB 00 00 R Read local temperature MSB Local Temperature LSB 01 00 R Read local temperature LSB Remote 1 Temperature MSB 02 00 R Read channel 1 remote temperature MSB Remote 1 Temperature LSB 03 00 R Read channel 1 remote temperature LSB Remote 2 Temperature MSB 04 00 R Read channel 2 remote temperature MSB Remote 2 Temperature LSB 05 00 R Read channel 2 rem
MAX31730 3-Channel Remote Temperature Sensor Register Map (continued) ADDRESS (HEX) POR VALUE (HEX) READ/ WRITE DESCRIPTION Filter Enable 18 00 R/W Enable/disable filter for each remote channel (should be disabled when not in constant conversion mode). Beta Compensation Enable 19 00 R/W Enable/disable beta compensation for each remote channel. Beta Value Channel 1 1A 00 R Contains the beta compensation value for channel 1.
MAX31730 3-Channel Remote Temperature Sensor Register Map (continued) ADDRESS (HEX) POR VALUE (HEX) READ/ WRITE THERM Mask 34 00 R/W Mask faults from asserting the THERM pin for each channel. Temperature Channel Enable 35 0F R/W Read/write temperature channel enable. Diode Fault Status 36 00 R Read diode fault status for each channel. Local Reference Temperature MSB 40 00 R/W MSB of local reference temperature for determining content of the highest temperature registers.
MAX31730 3-Channel Remote Temperature Sensor Register 01h: Local Temperature LSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access R R R R R R R R 01h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Bit 7 Bit 0 Register 02h: Remote 1 Temperature MSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 02h ºC R R R R R R R R D15 D14 D13 D12 D11 D10 D9 D8 Sign 26 25 24 23 22 21 20 Bit 7 Bit 0 Register 03h:
MAX31730 3-Channel Remote Temperature Sensor Register 05h: Remote 2 Temperature LSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access R R R R R R R R 05h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Bit 7 Bit 0 Register 06h: Remote 3 Temperature MSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 06h ºC R R R R R R R R D15 D14 D13 D12 D11 D10 D9 D8 Sign 26 25 24 23 22 21 20 Bit 7 Bit 0 Register 07
MAX31730 3-Channel Remote Temperature Sensor Register 11h: Highest Temperature LSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access R R R R R R R R 11h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Bit 7 Bit 0 Highest current temperature value LSB. Value in the highest temperature register will be the greater of all (the temperature channel value minus the channel reference temperature value).
MAX31730 3-Channel Remote Temperature Sensor Register 13h: Configuration Factory Default Value: 10h Memory Type: SRAM, Volatile Memory Access 13h R/W R/W R/W R/W R/W R/W R/W R/W STOP POR TIMEOUT INTERRUPT / COMPARATOR FAULT QUEUE FAULT QUEUE EXTRANGE ONE SHOT Bit 7 Bit 0 Bit 7 STOP Standby-Mode Control Bit. Setting STOP to 1 disables the ADC and reduces supply current to 2.5µA. 0 = ADC enabled (default). 1 = ADC disabled. Bit 6 POR Power-On-Reset Bit.
MAX31730 3-Channel Remote Temperature Sensor Register 15h: Custom Ideality Enable Factory Default Value: 00h Memory Type: SRAM, Volatile N/A N/A N/A N/A R/W R/W R/W N/A Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Reserved Memory Access 15h Bit 7 Bit 0 Bit 7 Reserved Reserved. Bit 6 Reserved Reserved. Bit 5 Reserved Reserved. Bit 4 Reserved Reserved. Bit 3 Remote 3 Channel 3 Remote-Diode Ideality Enable Bit. 0 = Sets ideality factor to 1.008 (default).
MAX31730 3-Channel Remote Temperature Sensor Register 17h: Custom Offset Enable Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 17h N/A N/A N/A N/A R/W R/W R/W N/A Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Reserved Bit 7 Bit 0 Bit 7 Reserved Reserved. Bit 6 Reserved Reserved. Bit 5 Reserved Reserved. Bit 4 Reserved Reserved. Bit 3 Remote 3 Remote Channel 3 Offset Enable Bit: 0 = Offset not enabled (default). 1 = Offset enabled.
MAX31730 3-Channel Remote Temperature Sensor Register 18h: Filter Enable Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 1Ch N/A N/A N/A N/A R/W R/W R/W N/A Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Reserved Bit 7 Bit 0 Bit 7 Reserved Reserved. Bit 6 Reserved Reserved. Bit 5 Reserved Reserved. Bit 4 Reserved Reserved. Bit 3 Remote 3 Channel 3 Noise Filter Select Bit. 0 = Noise filtering disabled (default).
MAX31730 3-Channel Remote Temperature Sensor Register 19h: Beta Compensation Enable Factory Default Value: 00h Memory Type: SRAM, Volatile N/A N/A N/A N/A R/W R/W R/W N/A Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Reserved Memory Access 19h Bit 7 Bit 0 Bit 7 Reserved Reserved. Bit 6 Reserved Reserved. Bit 5 Reserved Reserved. Bit 4 Reserved Reserved. Bit 3 Remote 3 Channel 3 Beta Compensation Enable Bit. 0 = Beta compensation disabled (default).
MAX31730 3-Channel Remote Temperature Sensor Register 1Bh: Beta Value Channel 2 Factory Default Value: 00h Memory Type: SRAM, Volatile N/A N/A N/A N/A R R R R Reserved Reserved Reserved Reserved Beta Value Beta Value Beta Value Beta Value Memory Access 1Bh Bit 7 Bit 0 Bits [7:4] Reserved The bits in these locations are reserved.
MAX31730 3-Channel Remote Temperature Sensor Register 21h: Local Thermal High Limit LSB Factory Default Value: 00h Memory Type: SRAM, Volatile R/W R/W R/W R/W R/W R/W R/W R/W 21h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Memory Access Bit 7 Bit 0 When the extended format is selected, all limit and reference temperature registers must be written in this format. They are not automatically translated by toggling the extended format bit.
MAX31730 3-Channel Remote Temperature Sensor Register 24h: Remote 2 Thermal High Limit MSB Factory Default Value: 7Fh Memory Type: SRAM, Volatile Memory Access R/W R/W R/W R/W R/W R/W R/W R/W 24h D15 D14 D13 D12 D11 D10 D9 D8 Sign 26 25 24 23 22 21 20 ºC Bit 7 Bit 0 When the extended format is selected, all limit and reference temperature registers must be written in this format. They are not automatically translated by toggling the extended format bit.
MAX31730 3-Channel Remote Temperature Sensor Register 27h: Remote 3 Thermal High Limit LSB Factory Default Value: 00h Memory Type: SRAM, Volatile R/W R/W R/W R/W R/W R/W R/W R/W 27h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Memory Access Bit 7 Bit 0 When the extended format is selected, all limit and reference temperature registers must be written in this format. They are not automatically translated by toggling the extended format bit.
MAX31730 3-Channel Remote Temperature Sensor Register 32h: Thermal Status, High Temperature Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 32h N/A N/A N/A N/A R R R R Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Local Bit 7 Bits [7:4] Bit 3 Bit 2 Bit 1 Bit 0 Bit 0 Reserved Reserved. Remote 3 Channel 3 Remote-Diode High Thermal Bit. 0 = Default value.
MAX31730 3-Channel Remote Temperature Sensor Register 33h: Thermal Status, Low Temperature Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 33h N/A N/A N/A N/A R R R R Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Local Bit 7 Bits [7:4] Bit 3 Bit 2 Bit 1 Bit 0 Bit 0 Reserved Reserved. Remote 3 Channel 3 Remote-Diode Low Thermal Bit. 0 = Default value.
MAX31730 3-Channel Remote Temperature Sensor Register 34h: THERM Mask Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access 34h N/A N/A N/A N/A R/W R/W R/W R/W Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Local Bit 7 Bit 0 Bits [7:4] Reserved Reserved. Bit 3 Remote 3 Channel 3 Thermal Mask Bit. 0 = Default value. 1 = Masks the assertion of the THERM pin when a thermal fault on channel 3 occurs. Bit 2 Remote 2 Channel 2 Thermal Mask Bit.
MAX31730 3-Channel Remote Temperature Sensor Register 35h: Temperature Channel Enable Factory Default Value: 0Fh Memory Type: SRAM, Volatile Memory Access 35h N/A N/A N/A N/A R/W R/W R/W R/W Reserved Reserved Reserved Reserved Enable 3 Enable 2 Enable 1 Enable Local Bit 7 Bits [7:4] Bit 3 Bit 2 Bit 1 Bit 0 Bit 0 Reserved Reserved. Remote 3 Channel 3 Enable Bit. 0 = Channel 3 is not enabled and is skipped during the temperature conversion cycle.
MAX31730 3-Channel Remote Temperature Sensor Register 36h: Diode Fault Status Factory Default Value: 00h Memory Type: SRAM, Volatile N/A N/A N/A N/A R/W R/W R/W N/A Reserved Reserved Reserved Reserved Remote 3 Remote 2 Remote 1 Reserved Memory Access 36h Bit 7 Bit 0 Bits [7:4] Reserved Reserved. Bit 3 Remote 3 Channel 3 Diode Fault Bit. 0 = Default value. 1 = Indicates an open or short on the channel 3 remote-diode connection. Bit 2 Remote 2 Channel 2 Diode Fault Bit.
MAX31730 3-Channel Remote Temperature Sensor Register 41h: Local Reference Temperature LSB Factory Default Value: 00h Memory Type: SRAM, Volatile R/W R/W R/W R/W R/W R/W R/W R/W 41h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Memory Access Bit 7 Bit 0 LSB of the local reference temperature (used for determining the content of the highest temperature registers).
MAX31730 3-Channel Remote Temperature Sensor Register 44h: Remote 2 Reference Temperature MSB Factory Default Value: 00h Memory Type: SRAM, Volatile Memory Access R/W R/W R/W R/W R/W R/W R/W R/W 44h D15 D14 D13 D12 D11 D10 D9 D8 Sign 26 25 24 23 22 21 20 ºC Bit 7 Bit 0 MSB of the channel 2 reference temperature (used for determining the content of the highest temperature registers).
MAX31730 3-Channel Remote Temperature Sensor Register 47h: Remote 3 Reference Temperature LSB Factory Default Value: 00h Memory Type: SRAM, Volatile R/W R/W R/W R/W R/W R/W R/W R/W 47h D7 D6 D5 D4 D3 D2 D1 D0 ºC 2-1 2-2 2-3 2-4 0 0 0 0 Memory Access Bit 7 Bit 0 LSB of the channel 3 reference temperature (used for determining the content of the highest temperature registers).
MAX31730 Applications Information Remote-Diode Selection The device directly measures the die temperature of CPUs and other ICs that have on-chip temperature-sensing diodes (see the Typical Application Circuits), or it can measure the temperature of a discrete diode-connected transistor. Discrete Remote Diodes When the remote-sensing diode is a discrete transistor, its collector and base must be connected together; PNP or npn discrete transistors can be used.
MAX31730 3-Channel Remote Temperature Sensor ADC Noise Filtering The integrating ADC has good noise rejection for lowfrequency signals, such as power-supply hum. In environments with significant high-frequency EMI, connect an external 100pF capacitor between DXP_ and DXN_. Larger capacitor values can be used for added filtering; however, this can introduce errors due to the rise time of the switched current source. Noise can be minimized with careful PCB layout, as discussed in the PCB Layout section.
MAX31730 3-Channel Remote Temperature Sensor Package Information Ordering Information PART TEMP RANGE PIN-PACKAGE MAX31730AUB+ -40°C to +125°C 10 µMAX MAX31730AUB+T -40°C to +125°C 10 µMAX MAX31730ATC+* -40°C to +125°C 12 TDFN-EP** MAX31730ATC+T* -40°C to +125°C 12 TDFN-EP** +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *Future product—contact factory for availability. **EP = Exposed pad.
MAX31730 3-Channel Remote Temperature Sensor Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 0 3/14 Initial release — 1 12/14 Updated General Description and Benefits and Features sections 1 DESCRIPTION For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
