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Analog Devices Inc./Maxim Integrated MAX11254ATJ+
- Part No.:
- MAX11254ATJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX11254ATJ+.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:386
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Product details
Overview
The MAX11254ATJ+ from Maxim Integrated is a 24-bit, 6-channel delta-sigma ADC with integrated 6.2nV/√Hz programmable gain amplifier (PGA), SPI interface, 64ksps maximum sample rate, and operation from single 2.7V–3.6V or split ±1.8V analog supplies-designed for high-precision DC measurements in battery-powered instrumentation and industrial analog I/O systems.
For engineers reviewing the MAX11254ATJ+ datasheet, MAX11254ATJ+ pinout, MAX11254ATJ+ application, or MAX11254ATJ+ equivalent, key selection criteria include its 133dB SNR at 50sps, 2.2mA active current, -40°C to +125°C operating range, AEC-Q100 qualification, and TQFN-32 package with fully differential inputs and user-programmable gain/offset calibration.
Technical Context
The MAX11254ATJ+ employs a fourth-order delta-sigma modulator with unconditional stability and a variable-decimation SINC digital filter supporting data rates from 1.9sps to 64ksps. Its built-in sequencer enables automated channel scanning, programmable conversion delay, and on-the-fly math operations for sensor monitoring.
It integrates a low-noise PGA (gain 1x–128x) with input-referred noise of 6.2nV/√Hz in low-noise mode, and supports both internal 8.192MHz oscillator and external clock synchronization via GPIO0/CLK. The device features dual supply domains (AVDD/AVSS and DVDD), independent power states (SLEEP, STANDBY, ACTIVE), and robust fault detection including overrange reporting in status registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit effective resolution with 133dB SNR at 50sps-enables ultra-precise DC measurement of microvolt-level signals in weigh scales and pressure sensors. |
| Sample Rate | Up to 64ksps in continuous mode-supports fast transient capture while maintaining >124dB SNR at 1ksps for high-fidelity sensor digitization. |
| PGA Noise Density | 6.2nV/√Hz (low-noise mode)-preserves signal integrity when interfacing directly with high-impedance bridges or thermocouples without external amplification. |
| Supply Range | Analog: 2.7V–3.6V single or ±1.8V split; Digital: 1.7V–3.6V-allows direct interfacing with 1.8V/2.5V/3.3V logic and sampling below ground in bipolar configurations. |
| Power Consumption | 2.2mA active current (AVDD), 1µA sleep current-extends battery life in portable instrumentation and enables always-on sensing in low-power IoT nodes. |
| Operating Temperature | -40°C to +125°C-qualified for under-hood automotive, industrial PLC, and harsh-environment embedded applications. |
| AEC-Q100 Grade | Grade 2 qualified (–40°C to +105°C ambient) per ordering information-validates reliability for automotive subsystems requiring functional safety support. |
Pinout & Package
MAX11254ATJ+ is housed in a 5mm × 5mm, 32-pin TQFN package with exposed pad (EP) connected to AVSS. Pin functions are validated per Maxim's official pin description table and functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDYB (Pin 1) | Active-low data ready output | Signals valid conversion result availability; drives low synchronously with new data in register-enables deterministic SPI read timing without polling. |
| AIN0P/AIN0N to AIN5P/AIN5N (Pins 7–8, 9–10, 11–12, 13–14, 15–16, 17–18) | Differential analog input channels | 6 fully differential input pairs support simultaneous high-accuracy measurement of bridge sensors, RTDs, or strain gauges with >140dB channel-to-channel isolation. |
| REFP/REFN (Pins 5–6) | Differential reference voltage inputs | Accept external reference up to VAVDD; common-mode range 0.75V to (VAVDD – 0.75V)-enables ratiometric or absolute measurements with precision references. |
| CAPP/CAPN (Pins 19–20) | PGA filter terminals | Require 1nF C0G capacitor between pins to stabilize PGA output-critical for achieving specified 6.2nV/√Hz noise performance and linearity. |
| GPO0/GPO1 (Pins 24, 22) | General-purpose outputs (current sink only) | Register-controlled switches connecting to GPOGND (Pin 21); support analog multiplexer control or LED driving up to 30mA per output. |
| GPIO0/CLK (Pin 23) | External clock input or GPIO | Accepts 8.192MHz clock (or lower) to synchronize multiple MAX11254ATJ+ devices-essential for phase-aligned multi-channel acquisition in motor control or power quality analyzers. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (1x–128x) | Enables direct connection to mV-range sensors (e.g., load cells) while preserving full 24-bit dynamic range-eliminates need for external signal conditioning stages. |
| User-Programmable Offset & Gain Registers | Allows on-demand system-level calibration without host MCU intervention-reduces firmware overhead and improves long-term drift compensation in field-deployed equipment. |
| Single-Cycle Conversion Mode | Delivers deterministic latency of 5/data rate seconds-supports real-time closed-loop control where timing predictability is critical (e.g., servo feedback). |
| Integrated Sequencer with Math Operations | Automates channel scanning, averaging, and min/max tracking-reduces host processor load in programmable logic controllers and data loggers. |
| Robust Fault Detection | Reports overrange, reference fault, and PGA saturation in status register-enables fail-safe behavior in safety-critical industrial and automotive applications. |
Applications
| Weigh Scales | Pressure Sensors |
|---|---|
Use Scenario: High-resolution weight measurement in platform scales and tank level systems using strain gauge bridges. IC Role / Device Role / Timing Role: Delta-sigma ADC with PGA buffers millivolt-level bridge outputs and digitizes at 50–200sps with 133dB SNR. Use Value: Resolves sub-gram changes in 100kg capacity systems; eliminates external instrumentation amplifiers and reduces BOM cost by 30%. |
Use Scenario: Industrial pressure transducers measuring 0–100bar with temperature-compensated analog outputs. IC Role / Device Role / Timing Role: Digitizes differential pressure sensor outputs with 124dB SNR at 1ksps and rejects 50/60Hz interference via 110dB CMR. Use Value: Achieves 0.01%FS accuracy across -40°C to +125°C without recalibration-meets IEC 61000-4-5 surge immunity requirements. |
| Battery-Powered Instrumentation | Analog I/O for Programmable Logic Controllers |
Use Scenario: Portable multimeters and handheld calibrators requiring >6½-digit resolution and >200-hour battery life. IC Role / Device Role / Timing Role: ADC operates in low-power mode (2.2mA) with 1µA sleep current and supports wake-on-event via RDYB interrupt. Use Value: Enables 3.7V Li-ion battery operation for >12 months in periodic measurement mode-exceeds EN 61000-6-2 emission limits. |
Use Scenario: Modular PLC backplanes acquiring analog inputs from 6 distributed sensors (e.g., temperature, flow, position) per module. IC Role / Device Role / Timing Role: 6-channel sequencer scans all inputs every 10ms with synchronized sampling and stores calibrated results in SPI-accessible registers. Use Value: Reduces scan cycle time by 40% vs. discrete ADC solutions; supports hot-swap and diagnostics via status register flags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1263IPBS | 32-pin TQFP package; 24-bit resolution; 38ksps max rate; integrated VREF and burn-out current sources; no AEC-Q100 qualification. | Preferred for lab-grade bench instruments requiring internal reference and sensor diagnostics-not suitable for automotive environments. | Select ADS1263IPBS when internal reference and sensor excitation are required, and AEC-Q100 is not mandated. |
| AD7177-2BRUZ | 32-pin TQFP; 32-bit resolution; 10ksps max rate; 2.5V internal reference; higher 130dB SNR at 10sps but larger 7mm × 7mm footprint. | Used in high-end process analyzers needing ultra-low drift (<10nV/°C) and metrology-grade linearity-not optimized for battery life or small PCB area. | Choose AD7177-2BRUZ for applications demanding <1ppm INL and traceable calibration-accept trade-offs in size and power. |
Compared with ADS1263IPBS and AD7177-2BRUZ, the MAX11254ATJ+ uniquely balances AEC-Q100 qualification, 5mm × 5mm TQFN packaging, 64ksps throughput, and 1µA sleep current-making it optimal for space-constrained, automotive-qualified, and battery-sensitive industrial measurement nodes.
Availability
MAX11254ATJ+ is available at Aetrix Electronics and suitable for weigh scales, pressure sensors, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX11254ATJ+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and medical applications-with emphasis on low-power, high-accuracy signal chains.
The MAX11254ATJ+ belongs to Maxim's high-performance delta-sigma ADC product line, engineered specifically for industrial process control, test equipment, and automotive sensor interfaces where resolution, noise, and reliability are mission-critical.
FAQ
What is the maximum sample rate of the MAX11254ATJ+ in continuous conversion mode?
The MAX11254ATJ+ achieves a maximum sample rate of 64ksps in continuous conversion mode. This is five times the single-cycle rate (e.g., 12.8ksps), enabled by pipelined SINC filter operation. At this rate, SNR remains at 124dB, supporting high-speed precision acquisition for applications like motor current sensing and power quality analysis.
Does the MAX11254ATJ+ support both unipolar and bipolar input ranges?
Yes, the MAX11254ATJ+ supports both unipolar (0 to VREF) and bipolar (–VREF to +VREF) input ranges. The U/B bit in the CTRL1 register configures the transfer function. Bipolar mode is essential for AC-coupled sensor interfaces and differential measurements where input signals swing above and below ground.
How does the PGA in the MAX11254ATJ+ improve interface with high-impedance sensors?
The MAX11254ATJ+'s integrated PGA provides gain settings from 1x to 128x with 6.2nV/√Hz input-referred noise and high input impedance (>1GΩ). It isolates high-Z sources (e.g., piezoresistive pressure sensors) from the switched-capacitor sampling network-preserving signal integrity and eliminating external op-amp stages required by most discrete ADCs.
What is the purpose of the CAPP and CAPN pins on the MAX11254ATJ+?
CAPP and CAPN are the differential output terminals of the MAX11254ATJ+'s programmable gain amplifier. A 1nF C0G capacitor must be placed between them to stabilize the PGA's frequency response and ensure specified noise performance (6.2nV/√Hz) and linearity. Omitting this capacitor degrades SNR and introduces gain error.
Is the MAX11254ATJ+ qualified for automotive applications?
Yes, the MAX11254ATJ+ is AEC-Q100 qualified (Grade 2: –40°C to +105°C ambient) as indicated in the official ordering information. This qualification validates its reliability for under-hood and chassis-mounted automotive subsystems, including battery management, brake pressure monitoring, and HVAC sensor interfaces.
MAX11254ATJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 64k
- Number of Inputs:
- 6
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±1.8V, 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.7V ~ 3.6V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-TQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11254ATJ+ FAQ
1.How can I place an order for MAX11254ATJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11254ATJ+ 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 MAX11254ATJ+ reliable?
The price and inventory of MAX11254ATJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11254ATJ+ is usually 5 days.
3.What payment methods are accepted for MAX11254ATJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11254ATJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11254ATJ+?
MAX11254ATJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11254ATJ+ 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 MAX11254ATJ+?
For technical support, including MAX11254ATJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11254ATJ+ requirements.
6.How does Aetrix verify that MAX11254ATJ+ is sourced from the original manufacturer or authorized distributors?
All MAX11254ATJ+ 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 MAX11254ATJ+ meets industry standards.
7.What is the process for return or replacement of MAX11254ATJ+?
All MAX11254ATJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11254ATJ+, 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 MAX11254ATJ+ part is unused and in its original packaging.
Return procedure for MAX11254ATJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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