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PGA900
SLDS258 – APRIL 2019
PGA900 Programmable Resistive Sensing Conditioner With Digital and Analog Outputs
1 Features
2 Applications
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High accuracy, low noise, low power, small size
resistive sensing signal conditioner
User-programmable temperature and nonlinearity
compensation
On-chip ARM® Cortex® M0 microprocessor allows
users to develop and implement calibration
software
One-wire interface enables the communication
through power supply pin without using additional
lines
On-chip power management accepts wide power
supply voltage from 3.3 V to 30 V
Operating temperature range: –40°C to +150°C
Memory:
– 8-kB software memory
– 128 bytes EEPROM
– 1-kB data SRAM
Accommodates sensor sensitivities from 1 mV/V
to 135 mV/V
Two individual analog-front end (AFE) chains,
each including:
– Low-noise programmable gain amplifier
– 24-bit sigma-delta analog-to-digital converter
Built-in internal temperature sensor with option to
use external temperature sensor
14-bit DAC with programmable gain amplifier
Output options:
– Ratiometric and absolute voltage output
– 4- to 20-mA current loop interface
– One-wire interface (OWI) over power line
– PWM output
– Serial peripheral interface (SPI)
– Inter-integrated circuit (I2C)
Depletion MOSFET gate driver
Diagnostic functions
•
Pressure sensor transmitters and transducers
Liquid level meters and flow meters
Weight scales, load meters, and strain gauges
Thermocouples, thermistors, and 2-wire
resistance thermometers (RTD)
Resistive field transmitters
3 Description
The PGA900 is a signal conditioner for resistive
sensing applications. It can accommodate various
sensing element types. The PGA900 conditions its
input signals by amplification and digitization through
two analog front end channels. With the user
programmed software in the on-chip ARM Cortex M0
processor, the PGA900 can perform linearization,
temperature compensation, and other user defined
compensation algorithms. The conditioned signal can
be output as ratiometric voltage, absolute voltage, 4to 20-mA current loop or PWM. The data and
configuration registers can also be accessed through
SPI, I2C, UART, and two GPIO ports. In addition, the
unique OWI allows communication and configuration
through the power supply pin without using additional
lines. The PGA900 operating voltage is from 3.3 V to
30 V and it can operate in temperatures from –40°C
to +150°C.
Device Information(1)
NUMBER
PACKAGE
PGA900
BODY SIZE (NOM)
VQFN (36)
6.00 mm × 6.00 mm
DSBGA (36)
3.66 mm × 3.66 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
PGA900 Simplified Block Diagram
PGA900
VBRGP
BRIDGE
SENSOR
RATIOMETRIC
BRIDGE EXCITATION
REFERENCE
VINPP
PGA
VINPN
24-bit
ADC
EEPROM
SOFTWARE
AND DATA
MEMORY
POWER MANAGEMENT
OWI
VDD
(3.3 ± 30 V)
SPI,
UART
MISO/TX,
MOSI/RX,
CSN, SCK
I2C
SCL, SDA
RESISTIVE SENSING AFE
VBRGN
VINTN
MUX
VINTP
PGA
24-bit
ADC
CONTROL
AND
STATUS
REGISTERS
TOPDIG,
TONDIG
PWM
14-bit
DAC
OR GAIN
VOUT
GPIO1
TEMPERATURE SENSING AFE
OPTIONAL
EXTERNAL
TEMPERATURE
SENSOR
INTERNAL
TEMPERATURE
SENSOR
DIAGNOSTICS
ARM
CORTEX M0
(PROGRAMMABLE
BY USERS)
INTERNAL
OSCILLATOR
DEBUGGER
GPIO2
SWDIO,
SWDCLK
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.
PGA900
SLDS258 – APRIL 2019
www.ti.com
4 Device and Documentation Support
4.1 Documentation Support
4.1.1 Related Documentation
For related documentation see the following:
• Texas Instruments, PGA900 as a Capacitive Load Driver application note
• Texas Instruments, PGA900 as a 4- to 20-mA Current Loop Transmitter application note
• Texas Instruments, Understanding Open Loop Gain of the PGA900 DAC Gain Amplifier application note
• Texas Instruments, Connecting PGA900 Instrumentation Amplifier to Resistive Bridge Sensor application note
• Texas Instruments, Understanding Open Loop Output Impedance of the PGA900 DAC Gain Amplifier
application note
• Texas Instruments, System Noise Analysis of a Resistive Bridge Pressure Sensor Connected to the PGA900
application note
• Texas Instruments, PGAxxxEVM-034 user’s guide
• Texas Instruments, PGA900 Software user's guide
• Texas Instruments, PGA900 Pressure and Temperature Sensor Signal Conditioner user's guide
4.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
4.3 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
4.4 Trademarks
E2E is a trademark of Texas Instruments.
ARM, Cortex are registered trademarks of ARM Ltd.
All other trademarks are the property of their respective owners.
4.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
4.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
5 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
2
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: PGA900
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
PGA900ARHHR
ACTIVE
VQFN
RHH
36
2500
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 150
PGA900A
RHH
PGA900ARHHT
ACTIVE
VQFN
RHH
36
250
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 150
PGA900A
RHH
PGA900AYZSR
ACTIVE
DSBGA
YZS
36
1500
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 150
PGA900A
YZS
PGA900AYZST
ACTIVE
DSBGA
YZS
36
250
RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 150
PGA900A
YZS
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
