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Analog Devices Inc./Maxim Integrated MAX40109IATP+T
- Part No.:
- MAX40109IATP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX40109IATP+T.pdf
- Description:
- IC SIGNAL CONDITIONER 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
MAX40109IATP+T from Analog Devices is a low-power, precision sensor interface SoC featuring a programmable analog front-end (AFE), 12.4-bit noise-free effective resolution ADC, third-order polynomial calibration memory, and dual analog/digital outputs. It supports Wheatstone-bridge pressure sensors with 20 PGA gain options (5–2520 V/V), 3V–36V supply operation, and operates across –40°C to +125°C for industrial pressure transducer signal conditioning.
For engineers reviewing the MAX40109IATP+T datasheet, MAX40109IATP+T pinout, MAX40109IATP+T application, or MAX40109IATP+T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative AFEs for bridge-based sensor systems requiring zero-pressure offset compensation, EMI rejection, and I²C/1-Wire programmability.
Technical Context
The MAX40109IATP+T integrates a high-precision PGA with 20 discrete gain settings (5–2520 V/V), configurable bridge drive (1.8–4.0 V) and current source (150–750 µA), plus on-chip calibration memory storing third-order temperature/nonlinearity compensation coefficients. Its analog output stage supports both ratiometric voltage output and 4mA–20mA loop driving via integrated DAC and buffer.
Digital interfaces include I²C (configurable slave address), 1-Wire (64-bit ROM code, CRC-8), and Power Line Communication (PLC); all support programming of PGA gain, bridge excitation, calibration parameters, and alarm thresholds. Internal diagnostics monitor over/under-voltage at INP+, INP−, DRV, and INT pins with 8-bit threshold resolution and ±3 LSB accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise-Free Resolution | 12.4 bits @ G=252 V/V, 1kHz BW - enables sub-0.03% FS pressure measurement repeatability in noisy industrial environments |
| PGA Gain Range | 5–2520 V/V (20 steps) - matches wide bridge sensitivity range (0.5–100 mV/V) without external amplification |
| Bridge Drive Voltage | 1.8 V / 2.3 V / 3.3 V / 4.0 V - selectable excitation ensures optimal SNR across sensor full-scale output |
| EMI Rejection Ratio | 80 dB @ 400–2400 MHz - suppresses RF interference from motors, radios, and switching power supplies |
| Supply Voltage Range | 3 V to 36 V - supports direct connection to 24 V industrial bus without LDO, reducing BOM count |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive pressure sensing and factory-floor process control |
| Zero-Pressure Offset Compensation | 12-bit resolution (44 μV/V), ±93 mV/V range - corrects mechanical stress-induced null shifts in sealed-gauge transducers |
Pinout & Package
The MAX40109IATP+T is housed in a 20-pin thin quad flat no-lead (TQFN) package, outline 21-0139, land pattern 90-0429, RoHS-compliant with exposed thermal pad. Package thermal resistance is θJA = 48°C/W (single-layer board) and 33°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDHV | High-Voltage Supply Input | Accepts 3–36 V main supply; powers internal regulators, PGA, and analog output stage |
| GND | Analog/Digital Ground | Common reference for all analog signals and digital I/O; requires low-impedance PCB plane |
| INP+, INP− | Differential Bridge Input | High-Z inputs accepting Wheatstone bridge output; support common-mode range up to 2.8 V |
| DRV | Bridge Excitation Output | Programmable voltage source (1.8–4.0 V) driving top of bridge; includes diagnostic OV/UV monitoring |
| INT | Temperature Sensor Current Source | Sinks 150–750 µA for external thermistor or RTD; enables dual-sensor calibration |
| OUT | Analog Output Driver | Buffered voltage output (ratiometric or fixed) or 4–20 mA loop driver; supports load up to 1 kΩ |
| SCL, SDA | I²C Interface | Standard 100/400 kHz I²C bus; used for configuration, data readout, and alarm generation |
| DQ | 1-Wire Interface | Single-wire bidirectional communication with 64-bit ROM ID; enables multi-drop sensor networks |
| ALERT | Interrupt Output | Open-drain active-low signal asserting on pressure/temperature threshold violation or fault condition |
| FB+, FB− | Output Feedback | Connect to OUT for closed-loop 4–20 mA operation; sets current compliance and linearity |
Key Features
| Feature | Design Value |
|---|---|
| Third-order polynomial calibration memory | Stores temperature- and nonlinearity-compensation coefficients per sensor unit, eliminating host MCU computation overhead |
| Programmable zero-pressure offset compensation | 12-bit adjustable null correction (±93 mV/V) applied before ADC conversion, correcting packaging-induced drift |
| Dual bridge excitation modes | Voltage source (1.8–4.0 V) or current source (250–750 µA) - adapts to sensor type (piezoresistive vs. thin-film) |
| Integrated EMI filtering | On-die RC network and layout-hardened input stage provide 80 dB rejection at cellular/WiFi frequencies without external ferrites |
| Multi-interface digital control | I²C, 1-Wire, and PLC enable flexible integration into legacy 4–20 mA loops, smart sensor nodes, or PLC-connected field devices |
Applications
| Industrial Pressure Transmitters | Automotive Brake/Engine Oil Pressure Sensors |
|---|---|
Use Scenario: 4–20 mA output pressure transmitter mounted on hydraulic manifold in factory automation system. IC Role / Device Role / Timing Role: Precision AFE digitizing mV-level bridge output, applying sensor-specific calibration, and driving current loop with ratiometric stability. Use Value: Delivers <0.1% FS total error over –25°C to +85°C using on-chip temperature compensation and EMI-hardened front-end. | Use Scenario: Compact oil pressure sensor embedded in engine bay with exposure to EMI from ignition coils and alternators. IC Role / Device Role / Timing Role: Signal conditioner interfacing piezoresistive bridge, rejecting broadband RF noise, and providing calibrated analog output to ECU. Use Value: 80 dB EMI rejection ratio prevents false pressure readings during spark events; 125°C rating ensures reliability at under-hood temperatures. |
| Medical Ventilator Flow/Pressure Modules | Strain Gauge-Based Load Cells |
Use Scenario: Critical-care ventilator requiring precise airway pressure feedback with fail-safe diagnostics. IC Role / Device Role / Timing Role: Dual-sensor AFE acquiring pressure and temperature simultaneously, performing real-time offset correction, and triggering ALERT on out-of-range conditions. Use Value: Integrated OV/UV diagnostics on INP+, INP−, DRV, and INT pins enable ISO 13485-compliant self-test without external comparators. | Use Scenario: High-accuracy platform scale using four-wire strain gauge bridge with thermal drift compensation. IC Role / Device Role / Timing Role: Programmable-gain AFE with 20-step PGA gain and 12.4-bit ENOB enabling 1:5000 resolution without external instrumentation amplifier. Use Value: 0.062 µV/°C input offset drift and third-order polynomial calibration reduce thermal error to <0.02% FS over –10°C to +50°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision bridge sensor interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7124-8BCPZ | 24-bit ΣΔ ADC with PGA only; no integrated bridge drive, DAC, or calibration memory | Requires external excitation source, op-amp output stage, and host-based compensation algorithm | Select when highest resolution (24-bit) is required and system has processing capability for calibration math |
| INA238IRGER | Current-sense AFE with 16-bit ADC, no bridge excitation, no temperature channel, no calibration memory | Limited to shunt-based current measurement; lacks Wheatstone bridge interface and dual-sensor support | Select for cost-sensitive current monitoring where bridge sensing is not needed |
Compared with AD7124-8BCPZ and INA238IRGER, the MAX40109IATP+T uniquely integrates bridge excitation, analog output driver, on-chip calibration memory, and multi-interface programmability-reducing system component count by ≥4 ICs and eliminating host-side compensation firmware.
Availability
MAX40109IATP+T is available at Aetrix Electronics and suitable for industrial pressure transmitters, automotive oil/brake pressure sensors, medical ventilator modules, and strain gauge load cells requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX40109IATP+T 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX40109IATP+T belongs to Analog Devices' precision sensor interface product line, engineered specifically for Wheatstone-bridge pressure and force sensors requiring integrated excitation, calibration, and analog/digital output in harsh environments.
FAQ
What is the operating temperature range of the MAX40109IATP+T?
The MAX40109IATP+T is specified for continuous operation from –40°C to +125°C. This extended range is validated across all electrical characteristics including PGA offset drift, ADC performance, and bridge drive accuracy. The device's thermal design supports reliable use in engine compartments, industrial ovens, and outdoor process instrumentation where ambient extremes are common. All test data in the datasheet reflects performance across this full range.
Does the MAX40109IATP+T support both voltage and current excitation for bridge sensors?
Yes, the MAX40109IATP+T supports programmable voltage excitation (1.8 V, 2.3 V, 3.3 V, or 4.0 V on DRV pin) and programmable current excitation (250–750 µA sourced from DRV pin). The selection is configured via I²C or 1-Wire registers. This dual-mode flexibility allows the MAX40109IATP+T to interface accurately with both voltage-driven and current-driven Wheatstone bridges, including thin-film and silicon piezoresistive elements.
How does the MAX40109IATP+T handle temperature compensation for pressure sensors?
The MAX40109IATP+T performs temperature compensation using on-chip third-order polynomial coefficients stored in MTP memory. It measures temperature either from the bridge itself (via ratiometric method) or from an external thermistor connected to the INT pin. The digital signal processor applies real-time correction to pressure output before delivering calibrated data via I²C or 1-Wire. No host MCU computation is required - the MAX40109IATP+T outputs fully compensated pressure values directly.
Can the MAX40109IATP+T generate a 4mA–20mA output signal?
Yes, the MAX40109IATP+T includes a dedicated analog output stage with integrated DAC and buffer capable of driving a 4mA–20mA current loop. Configuration is done via I²C or 1-Wire registers, and feedback is taken from FB+ and FB− pins to close the loop. The device maintains ratiometric accuracy even under varying supply and load conditions, meeting industrial 4–20 mA loop standards without external components.
What digital interfaces does the MAX40109IATP+T support for configuration and data readout?
The MAX40109IATP+T supports three digital interfaces: standard I²C (with configurable slave address), 1-Wire (with unique 64-bit ROM ID and CRC-8), and Power Line Communication (PLC). All three interfaces allow full register access for configuring PGA gain, bridge drive mode, calibration parameters, alarm thresholds, and reading calibrated pressure/temperature data. This multi-interface capability enables deployment in legacy 4–20 mA systems, distributed sensor networks, and PLC-connected field devices.
MAX40109IATP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 20-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Signal Conditioner
- Input Type:
- Logic
- Output Type:
- 1-Wire®, I2C
- Current - Supply:
- 2.57 mA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (4x4)
MAX40109IATP+T FAQ
1.How can I place an order for MAX40109IATP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40109IATP+T 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 MAX40109IATP+T reliable?
The price and inventory of MAX40109IATP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40109IATP+T is usually 5 days.
3.What payment methods are accepted for MAX40109IATP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40109IATP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40109IATP+T?
MAX40109IATP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40109IATP+T 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 MAX40109IATP+T?
For technical support, including MAX40109IATP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40109IATP+T requirements.
6.How does Aetrix verify that MAX40109IATP+T is sourced from the original manufacturer or authorized distributors?
All MAX40109IATP+T 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 MAX40109IATP+T meets industry standards.
7.What is the process for return or replacement of MAX40109IATP+T?
All MAX40109IATP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40109IATP+T, 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 MAX40109IATP+T part is unused and in its original packaging.
Return procedure for MAX40109IATP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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