AD7415ART-1500RL7 Analog Devices Inc, AD7415ART-1500RL7 Datasheet - Page 10

• Manufacturer Part Number: AD7415ART-1500RL7
• Description: IC SENSOR TEMP 10BIT SOT23-5 TR
• Manufacturer: Analog Devices Inc

Specifications of AD7415ART-1500RL7

• Rohs Status: RoHS non-compliant
• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25

AD7414/AD7415
In the AD7415, only three of the bits are used (D7, D6, and D2)
to set the operating modes (see Table 12). D0, D1, and D3 to D5
are used for factory settings and must have zeros written to
them during normal operation.
Table 12. AD7415 Configuration Register Settings
D7
D6
D2
If the AD7414/AD7415 are in power-down mode (D7 = 1), a
temperature conversion can still be initiated by the one-shot
operation. This involves a write operation to the configuration
register and setting the one-shot bit to 1 (D2 = 1), which causes
the AD7414/AD7415 to power up, perform a single conversion,
and power down again. This is a very power efficient mode.
TEMPERATURE VALUE REGISTER (ADDRESS 0
The temperature value register is a 10-bit, read-only register
that stores the temperature reading from the ADC in twos
complement format. Two reads are necessary to read data from
this register. Table 13 shows the contents of the first byte to be
read, while Table 14 and Table 15 show the contents of the
second byte to be read from the AD7414 and AD7415,
respectively. In Table 14, D3 to D5 of the second byte are used
as flag bits and are obtained from other internal registers. They
function as follows:
ALERT_Flag: The state of this bit is the same as that of the
T
T
The full theoretical span of the ADC is 255°C, but in practice
the temperature measurement range is limited to the operating
range of the device, −40°C to +125°C for the A grade.
HIGH
LOW
_Flag:
_Flag:
Full power-down if = 1.
Bypass SDA and SCL filtering if = 0.
Initiate a one-shot temperature conversion if set to 1.
The bit status is not stored; thus this bit is 0 if read.
ALERT pin.
This flag is set to 1 when the temperature
measured goes above the T
when the second temperature byte (Table 14) is
read. If the temperature is still greater than the
T
again.
This flag is set to 1 when the temperature
measured goes below the T
when the second temperature byte (Table 14) is
read. If the temperature is still less than the T
limit after the read operation, the flag is set again.
HIGH
limit after the read operation, the flag is
HIGH
LOW
limit. It is reset
limit. It is reset
X
00)
LOW
Rev. F | Page 10 of 20
Table 13. Temperature Value Register (First Read)
D15
MSB
Table 14. AD7414 Temperature Value Register (Second Read)
D7
B1
Table 15. AD7415 Temperature Value Register (Second Read)
D7
B1
AD7414 T
The T
that stores the upper limit that activates the ALERT output.
Therefore, if the value in the temperature value register is
greater than the value in the T
activated (that is, if ALERT is enabled in the configuration
register). Because it is an 8-bit register, the temperature
resolution is 1°C.
Table 16. T
D7
MSB
AD7414 T
The T
that stores the lower limit that deactivates the ALERT output.
Therefore, if the value in the temperature value register is less
than the value in the T
deactivated (that is, if ALERT is enabled in the configuration
register).
Because it is an 8-bit register, the temperature resolution is 1°C.
Table 17. T
D7
MSB
D6
LSB
HIGH
LOW
D6
LSB
D14
B8
register (see Table 17) is an 8-bit read/write register
register (see Table 16) is an 8-bit, read/write register
D6
B6
D6
B6
HIGH
LOW
D5
ALERT_Flag
HIGH
LOW
D5
N/A
Register
Register
REGISTER (ADDRESS 0
REGISTER (ADDRESS 0
D13
B7
D5
B5
D5
B5
LOW
D4
N/A
D4
B4
register, the ALERT pin is
D4
B4
D12
B6
D4
T
HIGH
HIGH
_Flag
D3
N/A
register, the ALERT pin is
D3
B3
D3
B3
D11
B5
D3
T
LOW
D2
N/A
D2
B2
D2
B2
_Flag
D10
B4
X
X
03)
02)
D1
N/A
D1
B1
D1
B1
D2
0
D9
B3
D1
0
D0
N/A
D0
B0
D0
B0
D8
B2
D0
0