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Texas Instruments PGA308AIDGSRG4
- Part No.:
- PGA308AIDGSRG4
- Manufacturer:
- Texas Instruments
- Category:
- Sensor and Detector Interfaces
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PGA308AIDGSRG4.pdf
- Description:
- IC PROG SENSOR SGL COND 10-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
PGA308AIDGSRG4 from Texas Instruments is a single-supply, auto-zero programmable analog sensor signal conditioner optimized for bridge sensors. It integrates a 2×2 input multiplexer, coarse/fine offset DACs (7-bit+sign and 16-bit), coarse/fine gain control (front-end PGA up to ×1600 + output amplifier up to ×6), over/under-scale limits, and fault monitoring - all in a DGS (MSOP-10) package rated for –40°C to +125°C operation.
For engineers reviewing the PGA308AIDGSRG4 datasheet, PGA308AIDGSRG4 pinout, PGA308AIDGSRG4 application, or PGA308AIDGSRG4 equivalent, key selection criteria include its one-wire UART interface for digital calibration, VOUT/VCLAMP dual-function pin, integrated OTP memory (7 banks), ±100 mV coarse offset range, and 0.33–1 fine gain adjust capability.
Technical Context
The PGA308AIDGSRG4 implements a fully analog signal path with front-end auto-zeroing at 40 kHz, enabling ultra-low drift and high DC precision. Its architecture separates coarse offset (7-bit+sign DAC, RTI ±100 mV) and fine offset (16-bit DAC, ±0.5×VREF) adjustment, while gain is split across a front-end PGA (×4 to ×1600 in 16 steps) and an output amplifier (×2 to ×6 in 7 steps), each with independent fine-tuning via 16-bit DACs.
Digital configuration occurs via a UART-compatible one-wire interface (1W pin), supporting both real-time programming and permanent storage in OTP memory. Fault detection uses four external comparators (INP_HI/INN_HI/INP_LO/INN_LO) configurable for bridge fault or common-mode fault modes, with thresholds referenced to either VS or VREF and programmable over/under-scale limits (8 OS/8 US levels).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +2.7 V to +5.5 V - supports direct connection to 3.3 V or 5 V systems without level-shifting. |
| Operating Temperature | –40°C to +125°C - qualified for automotive and industrial under-hood/enclosure environments. |
| Total Differential Gain | Up to ×9600 - enables full-scale conditioning of low-sensitivity bridge sensors (e.g., 0.08 mV/V) into 4 V output span. |
| Coarse Offset Range | ±100 mV RTI - covers typical initial bridge offset errors without external trimming components. |
| Fine Gain Adjust | 0.33 to 1.00 V/V in 65,536 steps - allows sub-0.0015% resolution gain trimming for system-level calibration. |
| One-Wire Interface Speed | 4.8 kbps to 114 kbps - enables fast factory calibration or field reconfiguration via single-wire UART link. |
| Input Bias Current | ±0.3 nA typical - minimizes error from high-impedance bridge sensor sources. |
Pinout & Package
PGA308AIDGSRG4 is housed in a 3 mm × 4.9 mm MSOP-10 (DGS) package with exposed thermal pad, optimized for space-constrained PCB layouts and thermal performance in industrial sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DOUT/VCLAMP | Dual-function terminal | Configurable as programmable digital output or VOUT over-voltage clamp (e.g., limit to 3.2 V for 3.3 V ADC protection). |
| 2 - 1W | One-wire UART interface | Single-pin serial programming and calibration port; supports three-terminal sensor module programming when tied to VOUT. |
| 3 - GND | Analog/digital ground reference | Common return for all internal circuitry; requires low-impedance connection to minimize noise coupling. |
| 4 - VS | Positive supply input | Provides power for entire analog signal path and digital logic; also serves as optional reference for fault monitor and scale limits. |
| 5 - VIN1 / 6 - VIN2 | Differential sensor inputs | Accept bridge outputs; internal 2×2 mux enables electronic lead swapping to correct wiring errors or sensor orientation. |
| 7 - VSJ | Output amplifier summing junction | Enables external compensation for capacitive loads >200 pF or custom gain setting with external resistors. |
| 8 - VFB | VOUT feedback sense | Allows external filtering/protection circuits without degrading VOUT accuracy; required for over/under-scale monitoring. |
| 9 - VOUT | Analog conditioned output | High-precision, rail-to-rail capable output (0.05 V to VS – 0.05 V) driving 10 kΩ load with <15 ms settling to 0.01% FSR. |
| 10 - VREF | Reference voltage input | Source for coarse/fine offset DACs; selectable as reference for fault monitor and over/under-scale thresholds (VS or VREF). |
Key Features
| Feature | Design Value |
|---|---|
| Seven-bank OTP memory | Stores calibrated gain/offset settings permanently; POR bank supports up to four programming cycles for production flexibility. |
| Bridge fault monitor | Detects open-circuit (burnout), short-circuit, and common-mode faults using four configurable comparators with hysteresis. |
| Auto-zero front-end PGA | 40 kHz auto-zero frequency eliminates 1/f noise and drift, achieving ±0.2 mV/°C offset drift and <50 nV/√Hz noise density at 1 kHz. |
| Programmable over/under-scale limits | Eight selectable thresholds per limit (OS0–OS7, US0–US7) enable robust system-level diagnostics and fail-safe response. |
| Input mux for lead swap | Electronic reversal of VIN1/VIN2 polarity corrects sensor wiring mismatches without hardware modification or board rework. |
Applications
| Strain Gauge Load Cell Interface | Remote 4–20 mA Transmitter Front-End |
|---|---|
|
Use Scenario: High-accuracy weight measurement in industrial scales using full-bridge strain gauges with ±20 mV/V initial offset and 0.5–2 mV/V sensitivity. IC Role / Device Role / Timing Role: Primary signal conditioner performing auto-zeroed amplification, digital offset/gain calibration, and fault detection before ADC digitization. Use Value: Eliminates manual potentiometer trimming; enables factory calibration stored in OTP; detects broken gauge wires via bridge fault monitor. |
Use Scenario: Sensor signal conditioning in loop-powered 4–20 mA transmitters where supply headroom is limited to 3.3 V or less. IC Role / Device Role / Timing Role: Single-chip analog front-end providing ratiometric gain/offset correction referenced to VREF, with VCLAMP limiting VOUT to match downstream ADC range. Use Value: Reduces component count by integrating mux, PGA, DACs, and clamp; supports 2.7 V minimum supply for low-power loop designs. |
| Automotive Pressure Sensor Module | Industrial Weigh Scale with Diagnostics |
|
Use Scenario: Conditioning piezoresistive pressure sensor outputs in engine manifold or brake line applications requiring AEC-Q100-compliant operation. IC Role / Device Role / Timing Role: Signal conditioner with extended temperature range (–40°C to +125°C), fault monitoring, and OTP-based calibration for EOL programming. Use Value: Enables on-board self-test via over/under-scale limits; detects sensor disconnection or shorting during vehicle startup sequence. |
Use Scenario: Legal-for-trade weighing systems requiring traceable calibration, long-term stability, and diagnostic reporting for regulatory compliance. IC Role / Device Role / Timing Role: Precision analog conditioner storing NIST-traceable calibration coefficients in OTP memory and reporting fault status via DOUT pin. Use Value: Supports audit-ready calibration logs; provides real-time fault flags (e.g., overload, underload, sensor burnout) for HMI or PLC integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable sensor signal conditioner applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA351AIDGSR | Lacks OTP memory, one-wire interface, and over/under-scale limits; no coarse/fine DAC architecture; only fixed-gain options (10, 100, 500 V/V). | Suitable for cost-sensitive, non-calibratable applications where factory trim is acceptable and diagnostics are handled externally. | Select INA351AIDGSR only if system-level calibration is performed externally and fault monitoring is implemented separately. |
| PGA460TPWR | Ultrasonic-specific signal conditioner with integrated ultrasonic driver and time-of-flight processing; no bridge sensor optimization or coarse/fine offset DACs. | Designed exclusively for ultrasonic distance sensing; incompatible with resistive bridge topologies and analog output requirements. | PGA460TPWR is not functionally substitutable - it serves a different sensor modality and lacks bridge sensor support. |
Compared with INA351AIDGSR and PGA460TPWR, PGA308AIDGSRG4 uniquely combines OTP-based digital calibration, dual-range offset/gain DACs, bridge-specific fault monitoring, and one-wire configurability - making it the only option among the three qualified for high-accuracy, self-contained bridge sensor modules requiring field-programmable or factory-permanent calibration.
Availability
PGA308AIDGSRG4 is available at Aetrix Electronics and suitable for bridge sensor interfaces, remote 4–20 mA transmitters, and automotive pressure sensing applications requiring stable component supply, long-term calibration retention, and industrial temperature operation.
Supply support for PGA308AIDGSRG4 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 sensor interface ICs.
The PGA308AIDGSRG4 belongs to TI's programmable analog sensor signal conditioner product line, designed specifically to replace discrete op-amp/DAC/mux solutions in bridge-based measurement systems requiring factory or field calibration and built-in diagnostics.
FAQ
What is the primary function of the DOUT/VCLAMP pin on the PGA308AIDGSRG4?
The DOUT/VCLAMP pin on the PGA308AIDGSRG4 serves two mutually exclusive roles: as a programmable digital output (DOUT) for status signaling or configuration acknowledgment, or as a voltage clamp (VCLAMP) to limit VOUT to a safe level (e.g., 3.2 V) for interfacing with lower-voltage ADCs. Selection is made via configuration register bits, and the pin must be externally biased when used as VCLAMP.
Can the PGA308AIDGSRG4 perform calibration without external equipment?
Yes - the PGA308AIDGSRG4 supports self-contained calibration using its one-wire (1W) interface. When connected to a microcontroller or host system with UART capability, the PGA308AIDGSRG4 can execute offset/gain sweeps, store results in its seven-bank OTP memory, and retain calibration across power cycles without requiring external DACs, trim pots, or PC-based tools.
Does the PGA308AIDGSRG4 support ratiometric operation with respect to bridge excitation voltage?
Yes - the PGA308AIDGSRG4 supports true ratiometric operation: VREF may be driven directly from the bridge excitation source, and both coarse/fine offset DACs, over/under-scale thresholds, and fault monitor references can be selected to track VREF rather than VS. This ensures output scaling remains proportional to excitation voltage variations.
How does the PGA308AIDGSRG4 handle sensor lead reversal errors?
The PGA308AIDGSRG4 includes a 2×2 input multiplexer that electronically swaps VIN1 and VIN2 connections under digital control. This allows correction of sensor lead reversal - whether due to manufacturing error or field installation mistake - without hardware changes, simply by updating the configuration register via the 1W interface.
What is the maximum total differential gain achievable with the PGA308AIDGSRG4?
The PGA308AIDGSRG4 achieves a maximum total differential gain of ×9600, calculated as front-end PGA gain (up to ×1600) × output amplifier gain (up to ×6) × fine gain adjust (maximum 1.0). This enables conditioning of very low-sensitivity bridge sensors (e.g., 0.08 mV/V) into a full 4 V output span with a +5 V excitation and supply.
PGA308AIDGSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Signal Conditioner
- Input Type:
- Voltage
- Output Type:
- Voltage
- Current - Supply:
- 1.6 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
PGA308AIDGSRG4 FAQ
1.How can I place an order for PGA308AIDGSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA308AIDGSRG4 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 PGA308AIDGSRG4 reliable?
The price and inventory of PGA308AIDGSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA308AIDGSRG4 is usually 5 days.
3.What payment methods are accepted for PGA308AIDGSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA308AIDGSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA308AIDGSRG4?
PGA308AIDGSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA308AIDGSRG4 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 PGA308AIDGSRG4?
For technical support, including PGA308AIDGSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA308AIDGSRG4 requirements.
6.How does Aetrix verify that PGA308AIDGSRG4 is sourced from the original manufacturer or authorized distributors?
All PGA308AIDGSRG4 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 PGA308AIDGSRG4 meets industry standards.
7.What is the process for return or replacement of PGA308AIDGSRG4?
All PGA308AIDGSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with PGA308AIDGSRG4, 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 PGA308AIDGSRG4 part is unused and in its original packaging.
Return procedure for PGA308AIDGSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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