ADT7318_15 Datasheet, PDF(30/44 Page) Analog Devices – 0.5C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs

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ADT7318_15 Datasheet, PDF (30/44 Pages) Analog Devices – 0.5C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs

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ADT7316/ADT7317/ADT7318

DAC D Register LSBs (Read/Write) [Address 0x16]

This 8-bit read/write register contains the 4/2 LSBs of the

ADT7316/ADT7317 DAC D word, respectively. The value in

this register is combined with the value in the DAC D register

MSBs and converted to an analog voltage on the VOUT-D pin.

On power-up, the voltage output on the VOUT-D pin is 0 V.

Table 31. DAC D (ADT7316) LSBs

D7 D6 D5 D4 D3 D2 D1 D0

B3 B2 B1 LSB N/A N/A N/A N/A

N/A N/A N/A N/A

1 Default settings at power-up.

Table 32. DAC D (ADT7317) LSBs

D7 D6 D5 D4 D3 D2 D1 D0

B1 LSB N/A N/A N/A N/A N/A N/A

N/A N/A N/A N/A N/A N/A

1 Default settings at power-up.

DAC D Register MSBs (Read/Write) [Address 0x17]

This 8-bit read/write register contains the 8 MSBs of the DAC D

word. The value in this register is combined with the value in

the DAC D register LSBs and converted to an analog voltage on

the VOUT-D pin. On power-up, the voltage output on the VOUT-D

pin is 0 V.

Table 33. DAC D MSBs

D6 D5 D4 D3 D2 D1 D0

MSB B8 B7 B6 B5 B4 B3 B2

1 Default settings at power-up.

Control Configuration 1 Register (Read/Write)

[Address 0x18]

This configuration register is an 8-bit read/write register that

is used to setup some of the operating modes of the ADT7316/

ADT7317/ADT7318.

Table 34. Control Configuration 1

D7 D6 D5 D4 D3 D2 D1 D0

PD C6 C5 C4 C3 C2 C1 C0

1 Default settings at power-up.

Table 35. Control Configuration 1 Bit Descriptions

Bit Function

C0 This bit enables/disables conversions in round robin

mode and single-channel mode. The

ADT7316/ADT7317/ ADT7318 power up in round-robin

mode, but monitoring is not initiated until this bit is set.

0 = Stop monitoring (default).

1 = Start monitoring.

C1:4 Reserved. Only write 0s.

C5 0 = Enable INT/INT output. 1 = Disable INT/INT output.

C6 Configures INT/INT output polarity. 0 = Active low.

1 = Active high.

PD Power-Down Bit. Setting this bit to 1 puts the ADT7316/

ADT7317/ADT7318 into standby mode. In this mode,

both the ADC and the DACs are fully powered down, but

the serial interface is still operational. To power up the

part again, write 0 to this bit.

Control Configuration 2 Register (Read/Write)

[Address 0x19]

This configuration register is an 8-bit, read/write register that

is used to set up some of the operating modes of the ADT7316/

ADT7317/ADT7318.

Table 36. Control Configuration 2

D7 D6 D5 D4 D3 D2 D1 D0

C7 C6 C5 C4 C3 C2 C1 C0

1 Default settings at power-up.

Table 37. Control Configuration 2

Bit

Function

C0:1 In single-channel mode, these bits select between VDD,

the internal temperature sensor, and the external

temperature sensor for conversion.

00 = VDD (default).

01 = Internal temperature sensor.

10 = External temperature sensor.

11 = Reserved.

C2:3 Reserved.

Selects between single-channel and round robin

conversion cycle. Default is round robin.

0 = Round robin.

1 = Single channel.

Default condition is to average every measurement on

all channels 16 times. This bit disables this averaging.

Channels affected are temperature and VDD.

0 = Enable averaging.

1 = Disable averaging.

SMBus timeout on the serial clock puts a 25 ms limit

on the pulse width of the clock. Ensures that a fault

on the master SCL does not lock up the SDA line.

SMBus timeout.

0 = Disable.

1 = Enable SMBus timeout.

Software reset. Setting this bit to 1 causes a software

reset. All registers and DAC outputs reset to their

default settings.

Rev. B | Page 30 of 44

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