PGA309AIPWR - Programmable Sensor Conditioner | TI | 16-TSSOP
MPN: PGA309AIPWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.17 | $61.70 |
| 100 | $5.48 | $548.00 |
| 500 | $4.93 | $2,465.00 |
| 1,000 | $4.38 | $4,380.00 |
PGA309AIPWR Overview
A programmable sensor conditioner is an integrated circuit that amplifies and calibrates the small differential output of a bridge sensor, such as a strain gauge or pressure sensor, converting it into a linear, temperature-compensated voltage output. It sits between the sensor and the ADC or microcontroller, forming a complete sensor signal chain. This category falls under sensor interface ICs within the broader analog signal processing domain.
Key features include a programmable gain amplifier (PGA) with adjustable gain, a digital-to-analog converter (DAC) for offset and span calibration, and an internal temperature sensor for drift compensation. The device supports a supply voltage up to 5.5V and provides a ratiometric or absolute voltage output. Its digital interface allows in-system calibration via a two-wire serial interface, simplifying production trimming.
The PGA309 employs a chopper-stabilized amplifier architecture to achieve low offset and drift, ensuring high accuracy over temperature. The integrated calibration engine uses look-up tables to linearize the sensor response, reducing the need for external components. This architecture provides a complete, factory-calibrated solution that minimizes assembly cost and improves yield.
Typical applications include industrial pressure transmitters, automotive manifold absolute pressure (MAP) sensors, and precision weigh scales. The device's wide temperature range and programmable features make it ideal for harsh environments where sensor accuracy is critical.
When designing with the PGA309AIPWR, ensure proper decoupling of the supply pins and careful layout of the analog input traces to minimize noise. The calibration coefficients should be stored in an external EEPROM, as the device does not have non-volatile memory on-chip.
Drop-in alternatives for PGA309AIPWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PGA309AIPWRG4
✅ Drop-In📋 Reference alternative (not in catalog)
PGA308AIPWR
✅ Drop-In📋 Reference alternative (not in catalog)
PGA308AIPWRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
PGA309AIPWT
✅ Drop-In📋 Reference alternative (not in catalog)
PGA309AIPWR Maximum Ratings & Electrical Characteristics
| Type | Voltage Output Programmable Sensor Conditioner |
| Number of Channels | 1 |
| Input Type | Differential |
| Output Type | Voltage |
| Supply Voltage - Max | 5.5 V |
| Supply Voltage - Min | 2.7 V |
| Operating Temperature Range | -40°C to +125°C |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Mounting Style | Surface Mount |
| Interface Type | 2-Wire Serial |
| Programmable Gain | Yes |
| DAC for Calibration | Yes |
| Internal Temperature Sensor | Yes |
| RoHS | Compliant |
| MSL Level | 1 - Unlimited |
PGA309AIPWR Pin Configuration
| Pin 1 | VINP — Positive analog input |
| Pin 2 | VINN — Negative analog input |
| Pin 3 | VREF — Voltage reference output |
| Pin 4 | VREFN — Negative voltage reference |
| Pin 5 | VREFP — Positive voltage reference |
| Pin 6 | VOUT — Analog output |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Power supply |
| Pin 9 | SCL — Serial clock |
| Pin 10 | SDA — Serial data |
| Pin 11 | TEST — Test pin |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Typical Applications
PGA309AIPWR is suitable for 6 applications: Industrial Pressure Transmitters, Automotive MAP Sensors, Precision Weigh Scales, Medical Pressure Monitoring, HVAC Pressure Sensors, Test and Measurement Equipment.
Industrial Pressure Transmitters
The PGA309AIPWR is ideal for industrial pressure transmitters that require high accuracy over a wide temperature range. Its programmable gain and digital calibration correct offset, span, and drift errors of bridge sensors. The device operates from 2.7V to 5.5V, allowing use in 3.3V or 5V systems. With a -40°C to +125°C range, it withstands harsh industrial environments. The 2-wire serial interface enables in-system calibration, reducing production cost. The voltage output simplifies interface to ADCs or PLCs.
Recommended
Automotive MAP Sensors
In automotive manifold absolute pressure (MAP) sensors, the PGA309AIPWR provides precise signal conditioning for the bridge sensor. Its wide temperature range (-40°C to +125°C) meets AEC-Q100 requirements. The programmable calibration compensates for sensor non-linearity and temperature drift, ensuring accurate engine control. The device's small 16-TSSOP package fits in compact sensor modules. The 2-wire interface allows factory calibration, and the voltage output is directly compatible with the ECU's ADC.
Recommended
Precision Weigh Scales
The PGA309AIPWR is suitable for precision weigh scales using load cells. Its low offset and drift ensure accurate weight measurement. The programmable gain amplifies the small bridge output, and the DAC calibrates zero and span. The internal temperature sensor compensates for thermal drift. The device operates from 2.7V to 5.5V, compatible with battery-powered scales. The voltage output can be directly read by a microcontroller's ADC, simplifying the design.
Recommended
Medical Pressure Monitoring
In medical devices like blood pressure monitors, the PGA309AIPWR conditions the bridge sensor output with high accuracy. Its low noise and drift ensure reliable readings. The programmable calibration allows adjustment for sensor variations. The device's small package and low power consumption are suitable for portable devices. The 2-wire interface enables calibration during manufacturing. The voltage output is easily interfaced with medical-grade ADCs.
Recommended
HVAC Pressure Sensors
The PGA309AIPWR is used in HVAC pressure sensors for monitoring refrigerant pressure. Its wide temperature range and programmable calibration ensure accurate readings in varying environmental conditions. The device operates from 2.7V to 5.5V, compatible with standard HVAC control boards. The voltage output simplifies interface to microcontrollers. The 2-wire serial interface allows field calibration, reducing maintenance costs.
Recommended
Test and Measurement Equipment
In test and measurement equipment, the PGA309AIPWR provides precise signal conditioning for pressure or force sensors. Its high accuracy and low drift are essential for calibration instruments. The programmable gain and DAC allow fine adjustment. The device's wide temperature range ensures stable performance in lab environments. The voltage output is compatible with data acquisition systems. The 2-wire interface enables remote calibration.
Recommended
Recommended Products Summary
Engineering reference data for PGA309AIPWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PGA309AIPWRG4 | PGA308AIPWR | PGA308AIPWRQ1 | PGA309AIPWT |
|---|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Internal Temperature Sensor | Yes | Yes | No | No | Yes |
| Calibration DAC | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade | No | No | No | Yes | No |
| RoHS Compliant | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated temperature sensor for drift compensation (vs PGA308AIPWR)
- Higher calibration resolution (vs PGA308AIPWR)
- Wider operating temperature range (vs PGA308AIPWR)
Design Notes
Ensure a clean power supply for the PGA309AIPWR. Use a 0.1uF ceramic capacitor close to the VDD pin and a 10uF bulk capacitor. The supply voltage range is 2.7V to 5.5V; avoid exceeding 5.5V to prevent damage. For noisy environments, consider an LC filter on the supply line.
Keep analog input traces short and shielded to minimize noise. Use a ground plane under the device and route the VINP and VINN traces symmetrically. Place the sensor excitation and reference components close to the IC. Follow the layout guidelines in the TI datasheet for optimal performance.
Do not forget to store calibration coefficients in an external EEPROM, as the PGA309 has no internal non-volatile memory. Also, ensure the serial interface is properly initialized after power-up. Incorrect calibration can lead to inaccurate sensor readings. Refer to the TI application notes for calibration routines.
Compliance Information
RoHS compliant per PartGenie. Not AEC-Q100 qualified; use PGA308AIPWRQ1 for automotive.
