EVAL-ADT7410EBZ Просмотр технического описания (PDF) - Analog Devices

Номер в каталоге

Компоненты Описание

производитель

EVAL-ADT7410EBZ

±0.5°C Accurate, 16-Bit Digital I²C Temperature Sensor

Analog Devices 

ADT7410

STATUS REGISTER

This 8-bit read-only register reflects the status of the overtempera-

ture and undertemperature interrupts that can cause the CT and

INT pins to go active. It also reflects the status of a temperature

conversion operation. The interrupt flags in this register are

reset by a read operation to the status register and/or when

the temperature value returns within the temperature limits,

including hysterisis. The RDY bit is reset after a read from the

temperature value register. In one-shot and 1 SPS modes, the

RDY bit is reset after a write to the one-shot bits.

CONFIGURATION REGISTER

This 8-bit read/write register stores various configuration modes

for the ADT7410, including shutdown, overtemperature and

undertemperature interrupts, one-shot, continuous conversion,

interrupt pins polarity, and overtemperature fault queues.

Table 10. Status Register (Register Address 0x02)

Default

Bit

Value Type Name Description

[0:3] 0000

R

Unused Reads back 0.

[4]

0

R

TLOW

This bit is set to 1 when the temperature goes below the TLOW temperature limit. The bit clears to 0

when the status register is read and/or when the temperature measured goes back above the limit

set in the setpoint TLOW + THYST registers.

[5]

0

R

THIGH

This bit is set to 1 when the temperature goes above the THIGH temperature limit. The bit clears to 0

when the status register is read and/or when the temperature measured goes back below the limit

set in the setpoint THIGH − THYST registers.

[6]

0

R

TCRIT

This bit is set to 1 when the temperature goes above the TCRIT temperature limit. This bit clears to 0

when the status register is read and/or when the temperature measured goes back below the limit

set in the setpoint TCRIT − THYST registers.

[7]

1

R

RDY

This bit goes low when the temperature conversion result is written into the temperature value

register. It is reset to 1 when the temperature value register is read. In one-shot and 1 SPS modes,

this bit is reset after a write to the one-shot bits.

Table 11. Configuration Register (Register Address 0x03)

Default

Bit Value Type Name

Description

[0:1] 00

R/W Fault queue

These two bits set the number of undertemperature/overtemperature faults that can occur before

setting the INT and CT pins. This helps to avoid false triggering due to temperature noise.

00 = 1 fault (default).

01 = 2 faults.

10 = 3 faults.

11 = 4 faults.

[2] 0

R/W CT pin polarity This bit selects the output polarity of the CT pin.

0 = active low.

1 = active high.

[3] 0

R/W INT pin polarity This bit selects the output polarity of the INT pin.

0 = active low.

1 = active high.

[4] 0

R/W INT/CT mode This bit selects between comparator mode and interrupt mode.

0 = interrupt mode

1 = comparator mode

[5:6] 00

R/W Operation mode These two bits set the operational mode for the ADT7410.

00 = continuous conversion (default). When one conversion is finished, the ADT7410 starts

another.

01 = one shot. Conversion time is typically 240 ms.

10 = 1 SPS mode. Conversion time is typically 60 ms. This operational mode reduces the average

current consumption.

11 = shutdown. All circuitry except interface circuitry is powered down.

[7] 0

R/W Resolution

This bit sets up the resolution of the ADC when converting.

0 = 13-bit resolution. Sign bit + 12 bits gives a temperature resolution of 0.0625°C.

1 = 16-bit resolution. Sign bit + 15 bits gives a temperature resolution of 0.0078°C.

Rev. 0 | Page 14 of 24

Share Link: