PGA300 Datasheet, PDF (1/70 Pages) Texas Instruments – Transmitter for Pressure Sensors

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PGA300
SLDS204A – OCTOBER 2014 – REVISED JUNE 2016
PGA300 Signal Conditioner and Transmitter for Pressure Sensors
1 Features
•1 Analog Features
– Analog Front-End for Resistive Bridge Sensors
– Accommodates Sensor Sensitivities From
1 mV/V to 135 mV/V
– On-Chip Temperature Sensor
– Programmable Gain
– 16-Bit Sigma-Delta Analog-to-Digital Converter
for Signal Channel
– 16-Bit Sigma-Delta Analog-to-Digital Converter
for Temperature Channel
– 14-Bit Output DAC
• Digital Features
– <0.1% FSO Accuracy Across Temperature
– System Response Time <220 µs
– Third-Order Offset, Gain, and Nonlinearity
Temperature Compensation
– Diagnostic Functions
– Integrated EEPROM for Device Operation,
Calibration Data and User Data
• Peripheral Features
– One-Wire Interface Enables Communication
Through the Power Supply Pin Without Using
Additional Lines
– 4-mA to 20-mA Current Loop Interface
– Ratiometric and Absolute Voltage Output
– Power Management Control
– Analog Low-Voltage Detect
• General Features
– Industrial Temperature Range: –40°C to 150°C
– Power Supply:
– On-Chip Power Management Accepts Wide
Power-Supply Voltage From 3.3 V to 30 V
– Integrated Reverse-Protection Circuit
2 Applications
• Pressure-Sensor Transmitter and Transducer
• Liquid-Level Meter, Flow Meter
• Resistive Field Trasmitter
3 Description
The PGA300 device provides an interface for
piezoresistive and strain-gauge pressure-sense
elements. The device is a full system-on-chip (SoC)
solution that incorporates programmable analog front
end (AFE), ADC, and digital signal processing that
enable direct connection to the sense element.
Further, the PGA300 device includes integrated
voltage regulators and an oscillator, thus minimizing
the number of external components. The device
achieves high accuracy by employing third-order
temperature and nonlinearity compensation. External
communication is achieved by using a one-wire serial
interface (OWI) through the power-supply pin in order
to simplify the system calibration process. An
Integrated DAC supports absolute-voltage,
ratiometric-voltage, and 4-mA to 20-mA current-loop
outputs.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PGA300
VQFN (36)
6.00 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
PGA300 Simplified Block Diagram
Bridge
Sensor
PGA300
BRG+
INP+
INP–
BRG–
INT+
INT–
Ratiometric
Bridge Excitation
Reference
PGA
16-Bit
ADC
Resistive Sensing AFE
PGA
16-Bit
ADC
Temperature Sensing AFE
Optional
External
Temperature
Sensor
Internal
Temperature
Sensor
Diagnostics
EEPROM
Power Management
OWI
PWR
(3.3 V – 30 V)
Control
and Status
Registers
14-Bit
DAC
GAIN
OUT
Third-Order TC and
Third-Order NL
Sensor
Compensation
Internal
Oscillator
Copyright © 2016, Texas Instruments Incorporated
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. PRODUCTION DATA.