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Texas Instruments PGA308AQDGSRQ1
- Part No.:
- PGA308AQDGSRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Sensor and Detector Interfaces
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PGA308AQDGSRQ1.pdf
- Description:
- IC OP AMP AUTO-ZERO SGL 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
PGA308AQDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified programmable analog sensor signal conditioner for bridge sensors, featuring auto-zero instrumentation amplifier architecture, 7-bit + sign coarse offset DAC (±100 mV RTI), 16-bit fine offset DAC (±0.5 VREF), and 16-bit output gain DAC (0.33–1 V/V). It delivers differential gains up to 1600 V/V with <0.25% initial error and supports automotive temperature range (–40°C to +125°C) in MSOP-10 package.
For engineers reviewing the PGA308AQDGSRQ1 datasheet, PGA308AQDGSRQ1 pinout, PGA308AQDGSRQ1 application, or PGA308AQDGSRQ1 equivalent, this page provides verified technical context, calibrated performance specifications, OTP memory configuration details, fault monitor thresholds, and real-world bridge sensor interface design guidance - all aligned to TI SBOS599A revision March 2012.
Technical Context
The PGA308AQDGSRQ1 integrates a 2×2 input multiplexer for lead-swap compensation, front-end auto-zero PGA with 15 selectable coarse gains (4–1600 V/V), and output amplifier with 7 discrete internal gains (2–6 V/V) plus 16-bit fine gain adjustment. Its analog path includes dedicated over/under-scale limit comparators referenced to VREF or VS, and dual-mode fault monitor supporting bridge burnout and common-mode fault detection.
Digital calibration occurs via 1-Wire UART interface (4.8 kbps to 114 kbps), with parameters stored in seven banks of one-time programmable (OTP) memory - including POR bank reprogrammable up to four times. The DOUT/VCLAMP pin serves as either programmable digital output or precision voltage clamp (1.25 V to 4.95 V), enabling safe interfacing with lower-voltage ADCs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | +2.7 V to +5.5 V - supports direct connection to automotive 3.3 V or 5 V rails without external LDO. |
| Total Differential Gain Range | 2.67 to 9600 V/V - product of front-end PGA (4–1600), output amplifier (2–6), and fine gain (0.33–1). |
| Offset Voltage (RTI) | ±5 μV typical (coarse offset disabled) - enables high-precision zeroing of low-output bridge sensors. |
| Input Voltage Noise Density | 50 nV/√Hz at 1 kHz (coarse offset = 0 V) - critical for resolving microvolt-level strain signals. |
| Slew Rate | 0.6 V/μs (compensation off) - sufficient for 100 Hz–1 kHz sensor bandwidths with fast step response. |
| Quiescent Current | 1.3–1.6 mA - optimized for always-on automotive modules with thermal constraints. |
| ESD Rating | HBM Level H2 (2 kV), CDM Level C3B (750 V) - meets AEC-Q100 stress test requirements. |
Pinout & Package
PGA308AQDGSRQ1 is housed in a 3 mm × 4 mm MSOP-10 package (DGS) with exposed pad for thermal dissipation. Pinout validated per TI SBOS599A Figure 19 (top view) and PIN DESCRIPTIONS table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DOUT/VCLAMP | Dual-function terminal | Configurable as open-drain digital output (4 mA sink) or precision voltage clamp (1.25–4.95 V) to protect downstream ADC inputs. |
| 2 - 1W | One-Wire UART interface | Single-wire calibration port supporting 4.8–114 kbps; connects to VOUT for 3-terminal sensor module programming. |
| 3 - GND | Analog ground reference | Low-impedance return for front-end PGA, DACs, and fault monitor comparators - must be star-connected to minimize noise coupling. |
| 4 - VS | Positive supply rail | Accepts +2.7 V to +5.5 V; powers all analog blocks and internal OTP programming circuitry (VS-PGM = 4.5–5.5 V). |
| 5 - VIN1 / 6 - VIN2 | Differential sensor inputs | Front-end multiplexed inputs accepting ±10 mA; support lead-swap correction and EMI filtering (f3dB = 40 MHz). |
| 7 - VSJ | Output amplifier summing junction | Enables external compensation for capacitive loads >200 pF or custom gain resistor networks. |
| 8 - VFB | VOUT feedback sense | Provides accurate feedback point for over/under-scale limits and output amplifier regulation - required for external filter integrity. |
| 9 - VOUT | Analog conditioned output | Rail-to-rail capable (0.05 V to VS – 0.05 V); drives 10 kΩ load with <15 μs settling time (0.01% FSR) at G = 200. |
| 10 - VREF | Reference voltage input | Accepts 1.8 V to VS; sets coarse offset DAC range (±100 mV) and selects fault monitor reference (VS or VREF). |
Key Features
| Feature | Design Value |
|---|---|
| Bridge Fault Monitor | Detects open-circuit or short-circuit conditions using configurable INP_HI/INN_HI and INP_LO/INN_LO comparators with ±10 mV offset and 7 mV hysteresis. |
| Seven-Bank OTP Memory | Stores gain/offset calibrations across 7 independent banks; POR bank supports up to 4 reprogramming cycles for field updates. |
| Input Mux for Lead Swap | Electronically swaps VIN1/VIN2 polarity to correct sensor wiring errors without hardware modification - critical for production line flexibility. |
| Over/Under-Scale Limits | Eight register-selectable thresholds (OS0–OS7, US0–US7) with ±3 ppm/°C tempco enable system-level diagnostics and fail-safe signaling. |
| Auto-Zero Architecture | 40 kHz internal chopper frequency eliminates 1/f noise and drift; achieves ±0.2 μV/°C offset drift (coarse offset enabled). |
| Dual-Use DOUT/VCLAMP | Eliminates need for external clamp diodes or level-shifters when interfacing with 3.3 V ADCs - reduces BOM count and layout area. |
Applications
| Automotive Pressure Sensing | Industrial Load Cell Interface |
|---|---|
|
Use Scenario: Signal conditioning for piezoresistive pressure transducers in engine manifold, brake, or HVAC systems. IC Role / Device Role / Timing Role: Front-end amplifier with programmable gain/offset, fault monitoring, and over-voltage clamping to 3.3 V ADC inputs. Use Value: Enables single-chip calibration of sensor nonlinearity and thermal drift across –40°C to +125°C, reducing post-production trimming labor. |
Use Scenario: Analog signal chain for strain-gauge-based weigh scales and industrial force measurement. IC Role / Device Role / Timing Role: Auto-zero instrumentation amplifier with 16-bit fine offset DAC and 7-bit coarse offset DAC for microvolt-level zero stability. Use Value: Achieves <±5 μV RTI offset and ±0.2 μV/°C drift - directly supports 24-bit ADC resolution without external zeroing circuitry. |
| Remote 4–20 mA Transmitter | Strain Gauge-Based Tire Pressure Monitoring |
|
Use Scenario: Sensor front-end in loop-powered 4–20 mA current transmitters for process control. IC Role / Device Role / Timing Role: Low-quiescent-current (1.3 mA) signal conditioner with DOUT/VCLAMP pin used as digital alarm output. Use Value: Integrates fault detection (bridge burnout), programmable scaling, and current-loop interface logic - cuts component count by ≥3 ICs. |
Use Scenario: Miniaturized TPMS sensor module requiring ultra-low power and high EMC immunity. IC Role / Device Role / Timing Role: EMI-hardened front-end (40 MHz input filter) with internal pull-up current sources (15–45 nA) for remote sensor biasing. Use Value: Input EMI filter and VIN1/VIN2 pull-up matching (±7 nA) ensure reliable operation in noisy RF environments near vehicle antennas. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable sensor amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA351EVM | Fixed-gain (10 V/V), no OTP memory, no One-Wire interface, no over/under-scale limits. | Lacks programmable calibration and fault diagnostics - suitable only for static, factory-trimmed designs. | Select PGA308AQDGSRQ1 when field recalibration, bridge fault detection, or multi-point scale adjustment is required. |
| PGA460TPWR | Ultrasonic transducer driver with integrated DSP, not a general-purpose bridge amplifier; different pinout and no coarse/fine offset DACs. | Designed for ultrasonic distance measurement, not resistive bridge sensors - incompatible signal path architecture. | Choose PGA308AQDGSRQ1 for bridge-based pressure, load, or torque sensing where analog signal conditioning dominates system requirements. |
Compared with INA351EVM and PGA460TPWR, the PGA308AQDGSRQ1 uniquely combines automotive-grade OTP calibration, dual-mode fault monitoring, and dual-use DOUT/VCLAMP functionality - making it the only option supporting full-field programmability and safety-critical diagnostics in bridge sensor systems.
Availability
PGA308AQDGSRQ1 is available at Aetrix Electronics and suitable for automotive pressure sensing, industrial load cell interface, remote 4–20 mA transmitter design, and strain gauge-based tire pressure monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PGA308AQDGSRQ1 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain and automotive electronics.
The PGA308-Q1 product line was designed specifically for AEC-Q100-compliant bridge sensor signal conditioning - integrating programmable gain, offset, fault monitoring, and OTP calibration into a single MSOP-10 IC for automotive and industrial sensing applications.
FAQ
What is the maximum total differential gain achievable with PGA308AQDGSRQ1?
The PGA308AQDGSRQ1 achieves a maximum total differential gain of 9600 V/V, calculated as the product of its front-end PGA gain (up to 1600 V/V), output amplifier gain (up to 6 V/V), and fine gain adjustment (up to 1 V/V). This is confirmed in the Electrical Characteristics table under "VOUT/VIN Differential Signal Gains" with GF = 1600, output amplifier gain = 6, and fine gain = 1.0.
How does the DOUT/VCLAMP pin function in clamp mode for PGA308AQDGSRQ1?
In clamp mode, the DOUT/VCLAMP pin on the PGA308AQDGSRQ1 limits VOUT to a user-defined voltage between 1.25 V and 4.95 V - preventing overvoltage damage to downstream 3.3 V ADCs. The clamp point is set by an external resistor divider from VS, and the actual clamping threshold is VCLAMP ±0.05 V, as specified in the Electrical Characteristics section under "Output Voltage Clamp."
Can PGA308AQDGSRQ1 perform lead-swap correction without changing PCB layout?
Yes. The PGA308AQDGSRQ1 includes an internal 2×2 input multiplexer that electronically swaps the connections of VIN1 and VIN2, correcting sensor lead reversal errors in software via OTP configuration - eliminating the need for board rework or manual jumper adjustments during production or field service.
What is the resolution and range of the coarse offset adjust DAC in PGA308AQDGSRQ1?
The coarse offset adjust DAC in the PGA308AQDGSRQ1 is a 7-bit + sign DAC with ±100 mV RTI range and 1 mV resolution when VREF = +5 V. This is explicitly stated in the Electrical Characteristics table under "Coarse Offset Adjust (RTI of Front-End PGA)" with "Resolution: 7 bit + sign, VREF = +5 V" and "Range: –100 to +100 mV."
Does PGA308AQDGSRQ1 support operation at 125°C ambient temperature?
Yes. The PGA308AQDGSRQ1 is AEC-Q100 Grade 1 qualified for ambient operating temperatures from –40°C to +125°C, with full electrical performance guaranteed across this range. The datasheet specifies "Specified Performance Range: –40°C to +125°C" and confirms operation up to +150°C in degraded-performance mode.
PGA308AQDGSRQ1 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:
- Active
- Programmable:
- Not Verified
- Type:
- Signal Conditioner
- Input Type:
- Voltage
- Output Type:
- Voltage
- Current - Supply:
- 1.6 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
PGA308AQDGSRQ1 FAQ
1.How can I place an order for PGA308AQDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PGA308AQDGSRQ1 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 PGA308AQDGSRQ1 reliable?
The price and inventory of PGA308AQDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PGA308AQDGSRQ1 is usually 5 days.
3.What payment methods are accepted for PGA308AQDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PGA308AQDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PGA308AQDGSRQ1?
PGA308AQDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PGA308AQDGSRQ1 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 PGA308AQDGSRQ1?
For technical support, including PGA308AQDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PGA308AQDGSRQ1 requirements.
6.How does Aetrix verify that PGA308AQDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All PGA308AQDGSRQ1 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 PGA308AQDGSRQ1 meets industry standards.
7.What is the process for return or replacement of PGA308AQDGSRQ1?
All PGA308AQDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with PGA308AQDGSRQ1, 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 PGA308AQDGSRQ1 part is unused and in its original packaging.
Return procedure for PGA308AQDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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