NXP Semiconductors
FXPS7115D4
Digital absolute pressure sensor, 40 kPa to 115 kPa
TEMPERATURE
∑
SINC
FILTER
MOVING
AVERAGE
OFFSET
AND
to temperature output
temperature sensor
CONVERTER
GAIN TRIM
aaa-023461
Figure 12.ꢀTemperature sensor signal chain block diagram
7.3.5.2 Temperature sensor output scaling equation
Equation 5 is used to convert temperature readings with the variables specified in
Table 7.
(5)
where:
TDEGC = The temperature output in degrees C
TLSB = The temperature output in LSB
T0LSB = The expected temperature output in LSB at 0 °C
TSENSE = The expected temperature sensitivity in LSB/°C
Table 7.ꢀTemperature conversion variables
Data reading
T0LSB (LSB)
TSENSE LSB/C)
8-bit register read
68
1
7.3.6 Common mode error detection signal chain
The device includes a continuous pressure transducer common mode error detection.
A simplified block diagram is shown in Figure 13. The common mode error signal is
compared against the normal absolute pressure signal. If the comparison falls outside
of pre-determined limits, the CM_ERROR bit in the DSP_STAT register is set. Once the
error condition is removed, the CM_ERROR bit is cleared as specified in Section 7.7.16
"DSP_STAT - DSP-specific status register (address 60h)".
common mode
signal from ADC
common mode
error signal
SINC
FILTER
LOW PASS
FILTER
COMPENSATION
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Figure 13.ꢀCommon mode error detection signal chain block diagram
7.4 Inter-integrated circuit (I2C) interface
The device includes an interface compliant to the NXP I2C-bus specification[3]. The
device operates in slave mode and includes support for standard mode, fast mode, and
fast mode plus, although the maximum practical operating frequency for I2C in a given
system implementation depends on several factors including the pull-up resistor values
and the total bus capacitance.
FXPS7115D4
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© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 3 — 5 December 2019
13 / 72
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