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Home > Products > Integrated Circuits (ICs) > Interface > Sensor and Detector Interfaces

Texas Instruments PGA302EPWT

Name: PGA302EPWT
Brand: Texas Instruments
SKU: PGA302EPWT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PGA302EPWT

Manufacturer:: Texas Instruments

Category:: Sensor and Detector Interfaces

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: PGA302EPWT.pdf

Description:: SENSOR SIGNAL CONDITIONER WITH 0

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Product details

Overview

PGA302EPWT from Texas Instruments is a dual-channel, ratiometric sensor signal conditioner IC designed for precision resistive bridge sensing in industrial transmitters. It integrates two chopper-stabilized programmable gain amplifiers (up to 200 V/V), a 16-bit sigma-delta ADC, on-chip temperature sensor, and a 14-bit ratiometric DAC delivering 0 V to 5 V output referenced to VDDP. It supports pressure, temperature, flow, and level transmitter applications with built-in diagnostics and EEPROM-based calibration storage.

For engineers reviewing the PGA302EPWT datasheet, PGA302EPWT pinout, PGA302EPWT application, or PGA302EPWT equivalent, this page delivers verified technical context including bridge excitation (2.5 V), I²C/one-wire interface support, 3rd-order digital linearity compensation, thermal drift performance (±250 ppm/°C), and TSSOP-16 package–specific layout and supply requirements.

Technical Context

The PGA302EPWT implements two independent analog front-end (AFE) channels: one for bridge sensor inputs (VINPP/VINPN) with programmable gain up to 200 V/V and offset cancellation (±54.75 mV), and another for temperature sensing (VINTP/VINTN) with configurable current source (45–1000 µA). Each channel feeds a shared 16-bit sigma-delta ADC operating at 4 MHz with 11.4 ENOB and ±0.8%FS linearity.

Digital processing includes third-order temperature coefficient and nonlinearity compensation, executed using coefficients stored in 128-byte EEPROM. Output is generated by a 14-bit DAC followed by a fixed 4 V/V ratiometric buffer, ensuring 0 V–5 V output scales precisely with VDDP. Communication occurs via I²C (SDA/SCL) or one-wire interface (OWI) over the power rail, enabling minimal-wire calibration in sealed transmitter housings.

Key Specifications

Parameter	Value and Actual Design Meaning
ADC Resolution	16-bit sigma-delta with 11.4 effective number of bits (ENOB) - enables high-precision digitization of low-level bridge outputs.
Programmable Gain Range	1.33 V/V to 200 V/V in 8 discrete steps - supports wide span of bridge sensitivities without external amplification.
Bridge Excitation	2.5 V ±0.1 V ratiometric supply - stable reference for resistive sensors; mismatch drift ≤ ±250 ppm/°C vs ADC reference.
DAC Output	14-bit ratiometric DAC + 4 V/V buffer → 0 V to 5 V output - fully referenced to VDDP, minimizing supply-induced error.
Temperature Sensor	Integrated silicon sensor with 20 LSB/°C gain and ±6 °C total error post-calibration - provides on-chip thermal reference for compensation.
Nonvolatile Memory	128-byte EEPROM with 1000 write cycles and 10-year data retention - stores calibration coefficients, configuration, and user data.
Interface Options	I²C (SCL/SDA) and one-wire over power line (OWI) - enables flexible system integration and field calibration without dedicated comms lines.

Pinout & Package

Packaged in a 16-pin TSSOP (PW), the PGA302EPWT measures 5 mm × 6.4 mm and features exposed pad thermal enhancement. Pin functions are validated per TI SLDS216B Rev. FEBRUARY 2025.

Pin/Terminal	Circuit Role	Design Meaning
1 VINTN	Temperature sensor negative input	Accepts differential input from external thermistor or RTD; paired with VINTP for precision temperature measurement.
2 VINTP	Temperature sensor positive input	Completes temperature-sensing AFE path; supports optional external sensor or internal sensor selection.
3 VINPP	Bridge sensor positive input	High-impedance (+10 MΩ) input for resistive bridge's positive leg; supports common-mode range up to +4.38 V.
4 VBRGN	Bridge drive negative output	Provides low-impedance return path for 2.5 V bridge excitation; rated for 8.5 mA continuous, 25 mA short-circuit limit.
5 VINPN	Bridge sensor negative input	Differential complement to VINPP; enables true differential bridge readout with >110 dB CMRR at 50 Hz.
6 VBRGP	Bridge drive positive output	Delivers regulated 2.5 V bridge excitation; ratiometric tracking ensures matched drift with ADC reference.
7 DACCAP	DAC low-pass filter capacitor terminal	Connects external capacitor (0.1–1000 nF) to set DAC output bandwidth and reduce noise; critical for stable 0–5 V output.
9 VOUT	Analog voltage output	Final buffered 0–5 V ratiometric output; drives loads up to ±2.5 mA with 100 µs settling time and <80 µVpp noise (10 Hz–1 kHz).
10 VDD	Analog power supply	4.5–5.5 V main supply; powers analog blocks and enables overvoltage shutdown at 5.65 V to protect internal circuitry.
13 SDA	I²C serial data I/O	Open-drain bidirectional interface for register access, EEPROM programming, and real-time configuration updates.
14 SCL	I²C serial clock input	Controls synchronous communication timing; supports standard/fast-mode I²C up to 400 kHz.
15 GND	Analog/digital ground reference	Common return for all analog and digital circuits; requires low-impedance PCB connection to minimize noise coupling.
16 DVDD	Digital logic regulator capacitor	Connects 100 nF decoupling capacitor to stabilize internal 1.8 V digital regulator; essential for reliable I²C and OWI operation.

Key Features

Feature	Design Value
Dual independent AFE chains	Separate P-gain (bridge) and T-gain (temperature) paths with dedicated programmable amplifiers and diagnostics - eliminates crosstalk and enables simultaneous sensor/thermal compensation.
Third-order digital compensation	On-chip algorithm corrects both temperature coefficient (TC) and nonlinearity (NL) errors using EEPROM-stored coefficients - achieves <±0.8%FS residual error without host MCU intervention.
Ratiometric 0–5 V output	14-bit DAC + 4 V/V buffer referenced to VDDP - ensures full-scale output tracks supply variations, eliminating need for external voltage references in 5 V systems.
One-wire interface (OWI)	Configurable communication over VDD rail at 2.4–9.6 kbps - reduces wiring count in sealed transmitter assemblies and enables final-system calibration without added connectors.
Comprehensive diagnostics	Real-time monitoring of bridge supply (OV/UV), sensor open/short, gain-stage over/under-voltage, and memory BIST - meets functional safety requirements for industrial transmitters.

Applications

Pressure Transmitter	Temperature Transmitter
Use Scenario: Industrial process control loop measuring gas or liquid pressure in pipelines with 4–20 mA or 0–5 V analog output. IC Role / Device Role / Timing Role: Primary signal conditioner converting millivolt-level piezoresistive bridge output into calibrated, temperature-compensated 0–5 V ratiometric voltage. Use Value: Enables single-chip solution with <±0.8%FS linearity and ±250 ppm/°C bridge-reference drift matching - reduces calibration labor and improves long-term stability in harsh environments.	Use Scenario: Remote temperature monitoring in HVAC, boiler controls, or chemical reactors using RTD or thermistor sensors. IC Role / Device Role / Timing Role: Dual-role conditioner: supplies precise current to external temperature sensor while digitizing its output and compensating for self-heating and lead resistance. Use Value: Integrated 45–1000 µA programmable current source and 20 LSB/°C internal sensor eliminate external biasing components and simplify thermal modeling.
Flow Transmitter	Level Transmitter
Use Scenario: Differential pressure-based flow metering in water treatment or oil & gas facilities requiring high accuracy across wide temperature ranges. IC Role / Device Role / Timing Role: Processes differential bridge signals from DP cell, applies 3rd-order TC/NL compensation, and outputs linearized analog voltage synchronized to system clock. Use Value: On-chip 3rd-order compensation replaces complex MCU firmware, reducing BOM cost and enabling deterministic latency (<96 µs sample period) for fast-loop control.	Use Scenario: Hydrostatic tank level sensing in chemical storage tanks where sensor must operate reliably from –40°C to +150°C ambient. IC Role / Device Role / Timing Role: Front-end conditioner for strain gauge or capacitive level sensors, providing excitation, amplification, digitization, and ratiometric analog output. Use Value: Ratiometric 0–5 V output and matched thermal drift (±250 ppm/°C) between bridge supply and ADC reference ensure consistent accuracy across extreme temperature swings.

Pressure Transmitter

Temperature Transmitter

Use Scenario: Industrial process control loop measuring gas or liquid pressure in pipelines with 4–20 mA or 0–5 V analog output.

IC Role / Device Role / Timing Role: Primary signal conditioner converting millivolt-level piezoresistive bridge output into calibrated, temperature-compensated 0–5 V ratiometric voltage.

Use Value: Enables single-chip solution with <±0.8%FS linearity and ±250 ppm/°C bridge-reference drift matching - reduces calibration labor and improves long-term stability in harsh environments.

Use Scenario: Remote temperature monitoring in HVAC, boiler controls, or chemical reactors using RTD or thermistor sensors.

IC Role / Device Role / Timing Role: Dual-role conditioner: supplies precise current to external temperature sensor while digitizing its output and compensating for self-heating and lead resistance.

Use Value: Integrated 45–1000 µA programmable current source and 20 LSB/°C internal sensor eliminate external biasing components and simplify thermal modeling.

Flow Transmitter

Level Transmitter

Use Scenario: Differential pressure-based flow metering in water treatment or oil & gas facilities requiring high accuracy across wide temperature ranges.

IC Role / Device Role / Timing Role: Processes differential bridge signals from DP cell, applies 3rd-order TC/NL compensation, and outputs linearized analog voltage synchronized to system clock.

Use Value: On-chip 3rd-order compensation replaces complex MCU firmware, reducing BOM cost and enabling deterministic latency (<96 µs sample period) for fast-loop control.

Use Scenario: Hydrostatic tank level sensing in chemical storage tanks where sensor must operate reliably from –40°C to +150°C ambient.

IC Role / Device Role / Timing Role: Front-end conditioner for strain gauge or capacitive level sensors, providing excitation, amplification, digitization, and ratiometric analog output.

Use Value: Ratiometric 0–5 V output and matched thermal drift (±250 ppm/°C) between bridge supply and ADC reference ensure consistent accuracy across extreme temperature swings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar sensor signal conditioning applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7793BRUZ	24-bit Σ-Δ ADC with PGA (1–128×), no integrated DAC or EEPROM; requires external microcontroller for compensation.	Lacks ratiometric 0–5 V output and on-chip 3rd-order compensation - suitable only when host MCU handles full calibration math.	Select AD7793BRUZ if higher resolution (24-bit) is required and system already includes a capable processor for real-time compensation.
MAX1452ACM+T	16-bit signal conditioner with 16-bit DAC, but no integrated temperature sensor or one-wire interface; EEPROM limited to 64 bytes.	Requires external temperature sensing and lacks OWI - less suited for sealed, minimal-wire transmitter designs.	Choose MAX1452ACM+T when legacy compatibility with MAX1452 register map is needed and diagnostics/I²C-only comms suffice.

Compared with AD7793BRUZ and MAX1452ACM+T, the PGA302EPWT uniquely integrates ratiometric 0–5 V output, on-chip 3rd-order compensation, internal temperature sensor, and one-wire interface - reducing system component count and enabling standalone operation in space-constrained transmitters.

Availability

PGA302EPWT is available at Aetrix Electronics and suitable for pressure transmitters, temperature transmitters, and flow transmitters requiring stable component supply, long-term calibration integrity, and automotive-grade reliability under extended temperature operation.

Supply support for PGA302EPWT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and industrial interface solutions.

The PGA302 product line was engineered specifically for high-accuracy, low-drift resistive bridge signal conditioning in industrial process transmitters - emphasizing ratiometric stability, integrated diagnostics, and minimal external component count.

FAQ

What is the maximum programmable gain of the PGA302EPWT?

The PGA302EPWT supports eight discrete gain settings ranging from 1.33 V/V to 200 V/V. The highest gain step (111) delivers 185–215 V/V typical, enabling direct interface with low-output bridge sensors (e.g., 2 mV/V) while maintaining 11.4 ENOB performance. This gain is applied in the chopper-stabilized P-gain amplifier stage before the 16-bit sigma-delta ADC. PGA302EPWT's gain temperature drift is tightly controlled at ±250 ppm/°C at 200 V/V.

Does the PGA302EPWT include an internal temperature sensor?

Yes, the PGA302EPWT integrates a calibrated silicon temperature sensor with a nominal sensitivity of 20 LSB/°C and ±6 °C total error after end-of-line calibration. It connects internally to the T-gain AFE chain and can be selected as the temperature input source instead of external VINTP/VINTN pins. The sensor operates across –40°C to +150°C and is used directly by the on-chip 3rd-order compensation engine. PGA302EPWT's internal temperature sensor eliminates the need for external thermal components in many transmitter designs.

How does the ratiometric 0–5 V output of the PGA302EPWT work?

The PGA302EPWT generates its 0–5 V output using a 14-bit DAC referenced to 0.25 × VDDP, followed by a fixed 4 V/V ratiometric gain buffer. Because both the DAC reference and gain stage track VDDP, the full-scale output scales linearly with the supply - e.g., at VDDP = 4.8 V, full scale is 4.8 V; at VDDP = 5.2 V, it is 5.2 V. This architecture ensures system-level accuracy remains stable despite supply variation, and PGA302EPWT's ratiometric error is specified at ±12 mV over 4.5–5.5 V VDD range.

What diagnostic capabilities does the PGA302EPWT provide?

The PGA302EPWT implements comprehensive hardware diagnostics including bridge supply OV/UV detection (±7.5%/–4% thresholds), sensor open/short detection via pulldown resistors (1 MΩ on VINPP/VINPN and VINTP/VINTN), gain-stage over/under-voltage monitoring, and memory built-in self-test (MBIST) for EEPROM integrity. Diagnostics generate status flags accessible via I²C registers and trigger watchdog reset if unhandled. These features support functional safety compliance in industrial transmitters, and PGA302EPWT's diagnostic coverage is explicitly validated per its datasheet Section 5.20.

Can the PGA302EPWT communicate without dedicated I²C lines?

Yes, the PGA302EPWT supports One-Wire Interface (OWI) communication over the VDD power rail, eliminating the need for separate SDA/SCL traces. OWI operates at 2.4–9.6 kbps and is activated by a pulse sequence on VDD, allowing configuration and calibration during final assembly inside sealed enclosures. This capability is unique to PGA302EPWT among comparable signal conditioners and is documented in Section 5.16 of its datasheet.

PGA302EPWT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Signal Conditioner

Input Type:: Logic

Output Type:: Voltage

Current - Supply:: 6.5 mA

Operating Temperature:: -40°C ~ 150°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP

PGA302EPWT FAQ

1.How can I place an order for PGA302EPWT through Aetrix?

Please submit a Request for Quotation (RFQ) for PGA302EPWT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PGA302EPWT reliable?

The price and inventory of PGA302EPWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA302EPWT is usually 5 days.

3.What payment methods are accepted for PGA302EPWT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA302EPWT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PGA302EPWT?

PGA302EPWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PGA302EPWT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PGA302EPWT?

For technical support, including PGA302EPWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA302EPWT requirements.

6.How does Aetrix verify that PGA302EPWT is sourced from the original manufacturer or authorized distributors?

All PGA302EPWT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PGA302EPWT meets industry standards.

7.What is the process for return or replacement of PGA302EPWT?

All PGA302EPWT units undergo pre-shipment inspection (PSI). If there is an issue with PGA302EPWT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PGA302EPWT part is unused and in its original packaging.

Return procedure for PGA302EPWT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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