FXPS7400A4
Rev. 4.1 — 29 May 2019
Analog absolute pressure sensor, 20 to 400 kPA
Product data sheet
1
General description
The FXPS7400A4 high-performance, high-precision absolute pressure sensor consists of
a compact capacitive micro-electro-mechanical systems (MEMS) device coupled with a
digital integrated circuit (IC) producing a fully calibrated analog output.
This sensor is ideal for many automotive applications such as manifold air pressure
(MAP), turbo MAP, comfort seating and other applications requiring operating absolute
pressure ranges up to 400 kPa.
The sensing element is based on NXP's high precision capacitive pressure cell
technology. The architecture benefits from redundant pressure transducers as an
expanded quality measure. It delivers highly accurate ratiometric analog readings of
absolute pressure while operating from either a 3.3 V or 5.0 V power supply.
The sensor operates over a pressure range of 20 kPa to 400 kPa and over a wide
temperature range of –40 ºC to 130 ºC
The sensor comes in an industry-leading 4 mm x 4 mm x 1.98 mm, restriction of
hazardous substances (RoHS) compliant, high-power quad flat no-lead (HQFN)
[1]
package suitable for small printed circuit board (PCB) integration. Its AEC-Q100
compliance, high accuracy, reliable performance and high media resistivity make it ideal
for use in automotive, industrial, and consumer applications.
[2]
2
Features and benefits
•
•
•
•
•
•
•
•
Absolute pressure range: 20 to 400 kPa
Operating temperature range: –40 °C to 130 °C
Analog output for monitoring of the absolute pressure signal
Pressure transducer and digital signal processor (DSP)
–
Internal self test
Capacitance to voltage converter with anti-aliasing filter
Sigma delta ADC plus sinc filter
800 Hz or 1000 Hz low-pass filter for absolute pressure
Lead-free, 16-pin HQFN, 4 mm x 4 mm x 1.98 mm package
3
Applications
3.1 Automotive
•
Manifold air pressure
–
MAP, TurboMAP
•
Small engine control
•
Liquid propane gas (LPG) or compressed natural gas (CNG) engine management
NXP Semiconductors
Analog absolute pressure sensor, 20 to 400 kPA
FXPS7400A4
3.2 Industrial
•
•
•
•
Compressed air
Manufacturing line control
Gas metering
Weather stations
3.3 Medical/Consumer
•
Blood pressure monitor
•
Medicine dispensing systems
•
White goods
4
Ordering information
Package
Name
Description
HQFN16, plastic, thermal enhanced quad flat pack; no leads; 16 terminals; 0.8 mm
pitch; 4 mm x 4 mm x 1.98 mm body
Version
SOT1573-1
HQFN16
Table 1. Ordering information
Type number
FXPS7400A4
4.1 Ordering options
Table 2. Ordering options
Device
FXPS7400A4T1
Range (kPa)
20 to 400 kPa
Packing
Packing Tape and Reel
Temperature range
–40 °C to 130 °C
FXPS7400A4
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 4.1 — 29 May 2019
2 / 22
NXP Semiconductors
Analog absolute pressure sensor, 20 to 400 kPA
FXPS7400A4
5
Block diagram
V
CC
INTERNAL VOLTAGE
REGULATOR
V
REG
V
REGA
V
SS
REFERENCE
VOLTAGE
V
REF
LOW VOLTAGE
DETECTION
OSCILLATOR
LOW VOLTAGE
DETECTION
CONTROL
LOGIC
OTP
ARRAY
TEST
TEST
I/O
TEST
TEST
V
REF
P-CELL 0
V
REF
P-CELL 1
C2V
GAIN
AAF
P
ABS
Σ
CONVERTER
V
REG
ANALOG
FILTER
AND
BUFFER
TEST
TEST
PCM
ENCODER
ANALOG_OUT
SINC
FILTER
TRIM
IIR
LPF
USER
OFFSET
ADJUST
P
ABS
COMMON
MODE
ERROR
DETECTION
DSP
aaa-029725
Figure 1. Block diagram of FXPS7400A4
6
Pinning information
6.1 Pinning
V
CC
V
CC
13
12
11
10
9
5
6
7
8
V
SS
15
NC
14
terminal 1
index area
V
CC
TEST
TEST
V
SS
1
2
3
4
16
17
ANALOG_OUT
TEST
TEST
TEST
NC
TEST
NC
TEST
aaa-029728
Transparent top view
Figure 2. Pin configuration for 16-pin HQFN
FXPS7400A4
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 4.1 — 29 May 2019
3 / 22
NXP Semiconductors
Analog absolute pressure sensor, 20 to 400 kPA
FXPS7400A4
6.2 Pin description
Table 3. Pin description
Pin
2, 5, 8, 9, 10, 11
3
4, 15
6, 7, 14
12
1, 13, 16
17
Pin name
TEST
TEST
V
SS
NC
ANALOG_OUT
V
CC
PAD
Description
Pins 2, 5, 8, 9, 10 and 11 are test pins and must be left unterminated in the
application.
Pin 3 is required to be tied to V
CC
for device operation.
Pins 4 and 15 are the supply return nodes and are connected internally to the die
attach pad (pin 17).
Pins 6, 7 and 14 are not internally connected and can be left unconnected in the
application.
Pin 12 provides a ratiometric analog output proportional to the absolute pressure
sensor data.
Pins 1, 13 and 16 supply power to the device. An external capacitor must be
connected between these pins and V
SS
, as shown in the application diagram.
Pin 17 is the die attach flag and must be connected to V
SS
.
7
Functional description
7.1 Voltage regulators
The device derives its internal supply voltage from the V
CC
and V
SS
pins. An external
filter capacitor is required for V
CC
, as shown in
Figure 12.
A reference generator provides a reference voltage for the ΣΔ converter.
FXPS7400A4
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 4.1 — 29 May 2019
4 / 22
NXP Semiconductors
Analog absolute pressure sensor, 20 to 400 kPA
V
CC
FXPS7400A4
V
REGA
V
REF
V
REGA
BIAS
GENERATOR
BANDGAP
REFERENCE
VOLTAGE
REGULATOR
OSCILLATOR
TRIM
TRIM
TRIM
C2V
REFERENCE
GENERATOR
V
REG_MOD
Σ
CONVERTER
V
CC
OTP
ARRAY
V
REG
DIGITAL
LOGIC
V
REF
VOLTAGE
REGULATOR
DSP
V
CC
COMPARATOR
VCC_UV_ERR
V
REG
COMPARATOR
POR
COMPARATOR
aaa-029736
V
REGA
V
REF
Figure 3. Voltage regulation and monitoring
7.2 Pressure sensor signal path
7.2.1 ΣΔ converter
A second order sigma delta modulator converts the voltage from the analog front end to a
data stream that is input to the DSP. A simplified block diagram is shown in
Figure 4.
FXPS7400A4
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
Product data sheet
Rev. 4.1 — 29 May 2019
5 / 22
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