AD7416-7418 Analog Devices, AD7416-7418 Datasheet - Page 12

• Manufacturer Part Number: AD7416-7418
• Description: 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
• Manufacturer: Analog Devices

AD7416/AD7417/AD7418
3. Writing two bytes of data to the T
If 9-bit resolution is required for the temperature setpoints,
then two bytes of data must be written to the T
T
register address, written to the address pointer register, fol-
lowed by two data bytes written to the selected data register.
This is illustrated in Figure 9.
HYST
Figure 9. Writing to the Address Pointer Register Followed by a Two Bytes of Data to the T
(CONTINUED)
(CONTINUED)
SDA
SCL
START BY
MASTER
registers. This consists of the serial bus address, the
SCL
SDA
SDA
SCL
SDA
SCL
START BY
MASTER
START BY
MASTER
1
1
D15
1
1
1
1
1
0
Figure 10. Reading a Single Byte of Data from the Configuration Register
D14
SERIAL BUS ADDRESS BYTE
0
0
0
SERIAL BUS ADDRESS BYTE
Figure 11. Reading Two Bytes of Data from T
SERIAL BUS ADDRESS BYTE
D13
0
MOST SIGNIFICANT DATA BYTE
0
1
FRAME 1
OTI
1
D12
FRAME 1
1
A2
FRAME 1
or T
FRAME 3
A2
D11
A2
HYST
A1
SDA (CONTINUED)
SCL (CONTINUED)
A1
D10
A1
Register.
A0
OTI
A0
D9
R/W
A0
and
R/W
ACK. BY
AD7416
ACK. BY
AD7416
R/W
D8
9
ACK. BY
AD7416
9
ACK. BY
AD7416
–12–
D7
9
P7
9
1
1
D7
1
READING DATA FROM THE AD7416/AD7417/AD7418
Reading data from the AD7416/AD7417/AD7418 is a one or
two byte operation. Reading back the contents of the Configura-
tion Register is a single byte read operation, as shown in Figure
10, the register address previously having been set by a single-
byte write operation to the address pointer register.
Reading data from the temperature value, T
ters is a two-byte operation, as shown in Figure 11. It is also
possible to read the most significant bit of a 9-/10-bit register in
this manner.
STOP BY
MASTER
D7
D15
LEAST SIGNIFICANT DATA BYTE FROM AD7416
D6
1
P6
1
D6
ADDRESS POINTER REGISTER BYTE
D6
D14
SINGLE DATA BYTE FROM AD7416
D5
MOST SIGNIFICANT DATA BYTE FROM AD7416
P5
D5
OTI
LEAST SIGNIFICANT DATA BYTE
D5
D13
D4
P4
D4
or T
FRAME 3
FRAME 2
FRAME 2
D12
D4
D3
D3
P3
HYST
FRAME 4
FRAME 2
D3
D10
D2
D2
P2
Register
D2
D11
D1
D1
P1
D1
D0
NO ACK. BY
D9
D0
P0
NO ACK. BY
MASTER
MASTER
OTI
ACK. BY
AD7416
D0
9
D8
9
or T
9
ACK. BY
ACK. BY
MASTER
AD7416
OTI
HYST
STOP BY
MASTER
9
STOP BY
MASTER
9
, or T
Register
STOP BY
MASTER
HYST
REV. B
regis-