AD7294 Analog Devices, AD7294 Datasheet - Page 33

• Manufacturer Part Number: AD7294
• Description: 12-Bit Monitor and Control System with Multichannel ADC, DACs, Temperature Sensor, and Current Sense
• Manufacturer: Analog Devices

Specifications of AD7294

• Resolution (bits): 12bit
• # Chan: 9
• Sample Rate: 200kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (Vref) p-p,2 V p-p,Uni (Vref),Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
T
The
ters for both Remote Channel T
It allows the user to add or subtract an offset to the temperature.
The offset registers for T
registers that store data in a twos complement format. This data
is subtracted from the temperature readings taken by T
and T
before the values are stored in the T
SENSE
AD7294
SENSE
OFFSET REGISTERS (0x26 AND 0x27)
2 temperature sensors. The offset is implemented
has temperature offset, 8-bit twos complement regis-
SENSE
1 and T
SENSE
1 and Remote Channel T
SENSE
SENSE
result register.
2 are 8-bit read/write
SENSE
SENSE
1
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2.
The offset registers can be used to compensate for transistors
with different ideality factors because the T
based on the 2N3906 transistor ideality factor. Different
transistors with different ideality factors result in different
offsets within the region of interest, which can be compensated
for by using this register.
Table 33. T
Input
Value (°C)
SENSE
MSB
D7
−32
Offset Data Format
D6
+16
D5
+8
D4
+4
D3
+2
SENSE
D2
+1
results are
D1
+0.5
AD7294
LSB
D0
+0.25