Datasheet ADT7411 (Analog Devices) - 8

ADT7411 Data Sheet PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS AIN6 1 16 AIN7 AIN5 2 15 AIN8 NC 3 ADT7411 14 AIN4 TOP VIEW CS 4 13 SCL/SCLK (Not to Scale) GND 5 12 SDA/DIN V 6 11 DD DOUT/ADD D+/AIN1 7 10 INT/INT D–/AIN2 8 9 AIN3
05 0 2- 88
NC = NO CONNECT
02 Figure 6. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 AIN6 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. 2 AIN5 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. 3 NC No Connection. 4 CS SPI—Active Low Control Input. This is the frame synchronization signal for the input data. When CS goes low, it enables the input register and data is transferred in on the rising edges and out on the falling edges of the subsequent serial clocks. It is recommended that this pin be tied high to VDD when operating the serial interface in I2C mode. 5 GND Ground Reference Point for All Circuitry on the Part. Analog and digital ground. 6 VDD Positive Supply Voltage, 2.7 V to 5.5 V. The supply should be decoupled to ground. 7 D+/AIN1 Positive Connection to External Temperature Sensor/Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to 5 V. 8 D−/AIN2 Negative Connection to External Temperature Sensor/Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to 5 V. 9 AIN3 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. 10 INT/INT Overlimit Interrupt. The output polarity of this pin can be set to give an active low or active high interrupt when temperature, VDD, or AIN limits are exceeded. Default is active low. Open-drain output needs a pull-up resistor. 11 DOUT/ADD DOUT—SPI Serial Data Output. Logic output. Data is clocked out of any register at this pin. Data is clocked out on the falling edge of SCLK. Open-drain output needs a pull-up resistor. ADD—I2C Serial Bus Address Selection Pin. Logic input. A low on this pin gives the Address 1001 000, while leaving it floating gives the Address 1001 010 and setting it high gives the Address 1001 011. The I2C address set up by the ADD pin is not latched by the device until after this address has been sent twice. On the eighth SCL cycle of the second valid communication, the serial bus address is latched in. Any subsequent changes on this pin have no effect on the I2C serial bus address. 12 SDA/DIN SDA—I2C Serial Data Input. I2C serial data to be loaded into the part’s registers is provided on this input. An open- drain configuration needs a pull-up resistor. DIN—SPI Serial Data Input. Serial data to be loaded into the part’s registers is provided on this input. Data is clocked into a register on the rising edge of SCLK. An open-drain configuration needs a pull-up resistor. 13 SCL/SCLK Serial Clock Input. This is the clock input for the serial port. The serial clock is used to clock data out of any register of the ADT7411 and to clock data into any register that can be written to. An open-drain configuration needs a pull- up resistor. 14 AIN4 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. 15 AIN8 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. 16 AIN7 Analog Input. Single-ended analog input channel. Input range is 0 V to 2.25 V or 0 V to VDD. Rev. C | Page 8 of 36 Document Outline Features Applications Pin Configuration General Description Revision History Specifications Functional Block Diagram Absolute Maximum Ratings ESD Caution Pin Configuration and Functional Descriptions Terminology Typical Performance Characteristics Theory of Operation Power-Up Calibration Conversion Speed Functional Description Analog Inputs Single-Ended Inputs Converter Operation ADC Transfer Function Analog Input ESD Protection AIN Interrupts Functional Description—Measurement Temperature Sensor VDD Monitoring On-Chip Reference Round Robin Measurement Single-Channel Measurement Temperature Measurement Method Internal Temperature Measurement External Temperature Measurement Layout Considerations Temperature Value Format Interrupts ADT7411 Registers Interrupt Status 1 Register (Read-Only) [Address = 00h] Interrupt Status 2 Register (Read-Only) [Address = 01h] Internal Temperature Value/VDD Value Register LSBs (Read-Only) [Address = 03h] External Temperature Value and AIN1 to AIN4 Register LSBs (Read-Only) [Address = 04h] AIN5 to AIN8 Registers LSBs (Read-Only) [Address = 05h] VDD Value Register MSBs (Read-Only) [Address = 06h] Internal Temperature Value Register MSBs (Read-Only) [Address = 07h] External Temperature Value or AIN1 Register MSBs (Read-Only) [Address = 08h] AIN2 Register MSBs (Read) [Address = 09h] AIN3 Register MSBs (Read) [Address = 0Ah] AIN4 Register MSBs (Read) [Address = 0Bh] AIN5 Register MSBs (Read) [Address = 0Ch] AIN6 Register MSBs (Read) [Address = 0Dh] AIN7 Register MSBs (Read) [Address = 0Eh] AIN8 Register MSBs (Read) [Address = 0Fh] Control Configuration 1 Register (Read/Write) [Address = 18h] Control Configuration 2 Register (Read/Write) [Address = 19h] Control Configuration 3 Register (Read/Write) [Address = 1Ah] Interrupt Mask 1 Register (Read/Write) [Address = 1Dh] Interrupt Mask 2 Register (Read/Write) [Address = 1Eh] Internal Temperature Offset Register (Read/Write) [Address = 1Fh] External Temperature Offset Register (Read/Write) [Address = 20h] VDD VHIGH Limit Register (Read/Write) [Address = 23h] VDD VLOW Limit Register (Read/Write) [Address = 24h] Internal THIGH Limit Register (Read/Write) [Address = 25h] Internal TLOW Limit Register (Read/Write) [Address = 26h] External THIGH/AIN1 VHIGH Limit Register (Read/Write) [Address = 27h] External TLOW/AIN1 VLOW Limit Register (Read/Write) [Address = 28h] AIN2 VHIGH Limit Register (Read/Write) [Address = 2Bh] AIN2 VLOW Limit Register (Read/Write) [Address = 2Ch] AIN3 VHIGH Limit Register (Read/Write) [Address = 2Dh] AIN3 VLOW Limit Register (Read/Write) [Address = 2Eh] AIN4 VHIGH Limit Register (Read/Write) [Address = 2Fh] AIN4 VLOW Limit Register (Read/Write) [Address = 30h] AIN5 VHIGH Limit Register (Read/Write) [Address = 31h] AIN5 VLOW Limit Register (Read/Write) [Address = 32h] AIN6 VHIGH Limit Register (Read/Write) [Address = 33h] AIN6 VLOW Limit Register (Read/Write) [Address = 34h] AIN7 VHIGH Limit Register (Read/Write) [Address = 35h] AIN7 VLOW Limit Register (Read/Write) [Address = 36h] AIN8 VHIGH Limit Register (Read/Write) [Address = 37h] AIN8 VLOW Limit Register (Read/Write) [Address = 38h] Device ID Register (Read-Only) [Address = 4Dh] Manufacturer’s ID Register (Read-Only) [Address = 4Eh] Silicon Revision Register (Read-Only) [Address = 4Fh] SPI Lock Status Register (Read-Only) [Address = 7Fh] Serial Interface Serial Interface Selection I2C Serial Interface Writing to the ADT7411 Writing to the Address Pointer Register for a Subsequent Read Writing Data to a Register Reading Data from the ADT7411 SPI Serial Interface Write Operation Read Operation SMBus/SPI INT/INTB SMBus Alert Response Outline Dimensions Ordering Guide