PGA331-Q1 Datasheet, PDF (1/3 Pages) Texas Instruments – Pressure Sensor Signal Conditioner

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PGA331-Q1 Pressure Sensor Signal Conditioner
PGA331-Q1
SLDS224 – MARCH 2016
1 Features
•1 Analog Features
– Analog Front-End for Resistive Bridge Sensors
– On-Chip Temperature Sensor
– Programmable Gain
– 16-Bit, 1-MHz Sigma-Delta Analog-to-Digital
Converter for Signal Channel
– 10-Bit Sigma-Delta Analog-to-Digital Converter
for Temperature Channel
– One 12-Bit DAC Outputs
• Digital Features
– Compensation Equation
– 2nd order Temperature Compensation
– On-Chip Oscillator
– Memory
– 89 Bytes of EEPROM
• Peripheral Features
– One-Wire Interface (OWI)
– Software Watchdog Timer
– Oscillator Watchdog
– Power Management Control
– Analog Low-Voltage Detect
• General Features
– Automotive Temperature Range: –40°C to
125°C
– Power Supply: 4.5-V to 5.5-V Operational,
–5.5-V to 16-V Absolute Maximum
– Qualified in Accordance With AEC-Q100
– QFN-36 Package
2 Applications
• Capacitive Pressure Sensor Signal Conditioning
3 Description
The PGA331-Q1 is an interface device for capacitive
sense elements. The device incorporates the analog
front end that directly connects to the sense element
and has voltage regulators and oscillator. The device
also includes sigma-delta analog-to-digital converter,
2nd order compensation and EEPROM memory. The
PGA331-Q1 also includes one ratiometric voltage
output.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PGA331QRHHRQ1 QFN (36)
6.00 × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Functional Block Diagram
Bridge
Sensor
ICAP1
PGA331-Q1
Bridge Excitation
EEPROM
SPI/I²C
SCK/
SDI/
SDO
CP1
CR1
CP2
CR2
VIN3
Gain
ADC1
Resistive Sensing AFE
Gain
ADC2
Control and
Status
Registers
OWI_EN
DAC1
DAC2
VOUT1
/OWI
VOUT2
Optional External
Temperature
Sensor
Temperature Sensing AFE
Internal
Temperature
Sensor
Diagnostics
2^nd Order TC & 2^nd
Order NL Sensor
Compensation
Internal Oscillator
and XTAL
Interface
XTAL
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.