ADT7516 datasheet(30/44 Pages) AD

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ADT7516/ADT7517/ADT7519

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Internal Temperature Value/VDD Value Register LSBs

(Read-Only) [Add. = 03h]

This 8-bit read-only register stores the two LSBs of the 10-bit

temperature reading from the internal temperature sensor and

the two LSBs of the 10-bit supply voltage reading.

Table 15. Internal Temperature/VDD LSBs

N/A

LSB

N/A

*Default settings at power-up.

Table 16.

Bit

Function

LSB of Internal Temperature Value.

B1 of Internal Temperature Value.

LSB of VDD Value.

B1 of VDD Value.

External Temperature Value and Analog Inputs 1 to 4

This is an 8-bit read-only register. Bits D2:D7 store the two LSBs

of the analog inputs AIN2–AIN4. Bits D0:D1 store the two LSBs

of either the external temperature value or AIN1 input value.

The type of input for D0 and D1 is selected by Bits C1:C2 of the

Control Configuration Register 1.

Table 17. External Temperature and AIN1 to AIN4 LSBs

A4LSB

A3LSB

A2LSB

T/A

T/ALSB

*Default settings at power-up.

Table 18.

Bit

Function

LSB of External Temperature Value or AIN1 Value.

Bit 1 of External Temperature Value or AIN1 Value.

LSB of AIN2 Value.

Bit 1 of AIN2 Value.

LSB of AIN3 Value.

Bit 1 of AIN3 Value.

LSB of AIN4 Value.

Bit 1 of AIN4 Value.

VDD Value Register MSBs (Read-Only) [Add. = 6h]

This 8-bit read-only register stores the supply voltage value. The

eight MSBs of the 10-bit value are stored in this register.

Table 19. VDD Value MSBs

*Loaded with VDD value after power-up.

Internal Temperature Value Register MSBs (Read-Only)

[Add. = 07h]

This 8-bit read-only register stores the internal temperature

value from the internal temperature sensor in twos complement

format. The eight MSBs of the 10-bit value are stored in this

Table 20. Internal Temperature Value MSBs

*Default settings at power-up.

External Temperature Value or Analog Input AIN1

This 8-bit read-only register stores, if selected, the external

temperature value or the analog input AIN1 value. Selection is

done in the Control Configuration 1 register. The external

temperature value is stored in twos complement format. The

eight MSBs of the 10-bit value are stored in this register.

Table 21. External Temperature Value/Analog Inputs MSBs

T/A9

T/A8

T/A7

T/A6

T/A5

T/A4

T/A3

T/A2

*Default settings at power-up.

AIN2 Register MSBs (Read) [Add. = 09h]

This 8-bit read register contains the eight MSBs of the AIN2

analog input voltage word. The value in this register is com-

bined with Bits D2:3 of the external temperature value and

Analog Inputs 1 to 4 register LSBs, Address 04h, to give the full

10-bit conversion result of the analog value on the AIN2 pin.

Table 22. AIN2 MSBs

MSB

*Default settings at power-up.

AIN3 Register MSBs (Read) [Add. = 0Ah]

This 8-bit read register contains the eight MSBs of the AIN3

analog input voltage word. The value in this register is com-

bined with Bits D4:5 of the external temperature value and

Analog Inputs 1 to 4 register LSBs, Address 04h, to give the full

10-bit conversion result of the analog value on the AIN3 pin.

Table 23. AIN3 MSBs

MSB

*Default settings at power-up.

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