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Analog Devices Inc./Maxim Integrated MAX1230BETI+
- Part No.:
- MAX1230BETI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX1230BETI+.pdf
- Description:
- IC ADC 12BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,832
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Product details
Overview
MAX1230BETI+ from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over -40°C to +85°C), 16-entry FIFO, internal 4.096V reference, and true differential track/hold. It supports 16 single-ended or 8 differential input channels in unipolar/bipolar modes and operates from a single +5V supply. Used in industrial control systems for multichannel voltage and temperature monitoring.
For engineers reviewing the MAX1230BETI+ datasheet, MAX1230BETI+ pinout, MAX1230BETI+ application, or MAX1230BETI+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, package-validated pin functions, and two confirmed alternative parts for system-level trade-off analysis.
Technical Context
The MAX1230BETI+ employs a fully differential successive-approximation register (SAR) architecture with on-chip track-and-hold, enabling simultaneous acquisition of true differential pairs (e.g., AIN0/AIN1, AIN12/AIN13) and supporting both unipolar (0 to VREF) and bipolar (±VREF/2) input ranges. Its internal oscillator enables autonomous scan mode without external timing control.
It integrates a dedicated temperature-sensing path using the internal reference, delivering 1/8°C resolution in two's complement format. The 16-deep FIFO buffers conversion results-including temperature data-allow burst acquisition without serial bus contention, while AutoShutdown reduces current to 0.2µA during idle periods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 300ksps max - supports high-speed transient capture in data-acquisition systems with undersampling capability up to 1MHz input bandwidth. |
| INL / DNL | ±1 LSB - ensures <0.025% full-scale linearity error, critical for precision instrumentation calibration and closed-loop control accuracy. |
| Internal Reference | 4.096V ±72mV (±20ppm/°C TC) - provides stable scaling without external components; used for all temperature measurements and optional for voltage conversions. |
| Temp Sensor Accuracy | ±1.2°C over -40°C to +85°C - enables reliable board-level thermal monitoring without external sensors or calibration. |
| Supply Current | 2.3mA at 300ksps (internal ref) - enables low-power operation in battery-backed or energy-constrained industrial nodes. |
| Digital Interface | 10MHz SPI/QSPI/MICROWIRE-compatible 3-wire - interoperates with standard microcontroller peripherals without protocol translation logic. |
Pinout & Package
The MAX1230BETI+ is packaged in a 28-pin 5mm × 5mm thin QFN with exposed pad (EP), thermally connected to GND for enhanced power dissipation in compact industrial layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog Input Channels | 16 configurable inputs; each can be assigned as single-ended or paired for true differential measurement (e.g., AIN12/AIN13); AIN12–AIN15 available only on MAX1230. |
| REF+/REF− | Reference Inputs | REF+ accepts 1.0V to VDD+50mV; REF− serves as negative reference or analog input (AIN14); enables external differential reference or extended channel count. |
| CNVST/AIN15 | Conversion Start / Analog Input | Active-low hardware trigger for conversion start; when configured as CNVST, AIN15 is disabled - prevents signal conflict during triggered acquisition. |
| SCLK, DIN, DOUT, CS | Serial Interface | Standard 3-wire SPI interface: SCLK up to 10MHz; DOUT updates on falling edge; CS enables tri-state output and initiates frame sync. |
| EOC | End-of-Conversion Flag | Active-low open-drain output signals completion of last requested operation; asserted in clock modes 00/01/10; always high in externally clocked mode (11). |
| VDD, GND, EP | Power & Ground | +5V supply with 0.1µF local bypass; EP must be soldered to large ground plane for thermal management and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| 16-entry FIFO buffer | Stores up to 16 ADC results plus one temperature reading, enabling background scanning without CPU intervention or serial bus blocking. |
| True differential track/hold | Rejects common-mode noise and DC offsets on matched input pairs (e.g., AIN12/AIN13), preserving signal integrity in noisy industrial environments. |
| Internal temperature sensor | Delivers calibrated Celsius readings at 1/8°C resolution using internal reference - eliminates need for external sensor and associated layout complexity. |
| AutoShutdown™ mode | Reduces supply current to 0.2µA during idle periods, extending operational life in intermittently active monitoring applications like remote data loggers. |
| Configurable clock modes | Four modes (00–11) support hardware-triggered, software-initiated, internally timed, or externally clocked acquisition - adapts to diverse system timing architectures. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow sensor outputs across 12+ analog points in PLC-based factory automation. IC Role / Device Role / Timing Role: Central multichannel ADC performing synchronized voltage and on-die temperature sampling every 3.3ms (300ksps aggregate) with FIFO buffering. Use Value: Eliminates external multiplexer and reference ICs; internal 4.096V reference and ±1 LSB INL ensure <0.025% measurement consistency across channels and temperature range. | Use Scenario: Compact bedside monitor acquiring ECG lead voltages, respiration impedance, and ambient/skin temperature in portable medical devices. IC Role / Device Role / Timing Role: Dual-role signal digitizer: performs true differential ECG channel acquisition and concurrent on-chip die temperature sensing for thermal drift compensation. Use Value: Single-chip solution replaces discrete ADC + temp sensor; ±1.2°C sensor accuracy enables real-time thermal correction of analog front-end gain/offset without calibration tables. |
| Data Logger with Thermal Awareness | Energy Metering Subsystem |
Use Scenario: Battery-powered environmental logger recording temperature, humidity (via analog output sensor), and supply rail voltage over weeks in remote locations. IC Role / Device Role / Timing Role: Low-power ADC managing periodic wake-up cycles: acquires temperature every 10s and voltage every 60s using AutoShutdown between samples. Use Value: 0.2µA shutdown current extends battery life; integrated FIFO allows burst sampling during active window without MCU polling overhead. | Use Scenario: Secondary metering channel in smart electricity meters measuring auxiliary parameters (e.g., transformer temperature, enclosure humidity, DC bias rails). IC Role / Device Role / Timing Role: Auxiliary ADC interfacing with isolation amplifiers and RTD signal conditioners, providing 12-bit resolution at 1ksps per channel with programmable averaging. Use Value: Internal averaging (up to 64x) reduces noise in low-bandwidth sensor paths; unipolar/bipolar register control simplifies firmware handling of AC-coupled current sense signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit, 1MSPS, 16-channel, SPI interface; no integrated temp sensor; requires external reference; 32-pin VQFN. | Lacks on-die temperature sensing and internal reference - demands additional BOM components for thermal monitoring and voltage scaling. | Select when higher throughput (1MSPS) is required and system already includes precision reference and thermal sensing infrastructure. |
| AD7490BRUZ | 12-bit, 1MSPS, 16-channel, SPI interface; no FIFO; no integrated temp sensor; internal reference selectable (2.5V/4.096V); 28-pin TSSOP. | Missing FIFO and temperature sensor - requires continuous MCU polling and external thermal solution; lower integration increases PCB area and firmware complexity. | Choose for cost-sensitive designs where FIFO buffering and die temperature are not needed, and 1MSPS sampling is prioritized over autonomous operation. |
Compared with ADS7953IRHBT and AD7490BRUZ, the MAX1230BETI+ uniquely combines FIFO buffering, integrated temperature sensing, and internal reference in a single 28-pin QFN - reducing component count, layout area, and firmware overhead for embedded monitoring systems requiring autonomous multichannel acquisition.
Availability
MAX1230BETI+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, data logging with thermal awareness, and energy metering subsystems requiring stable component supply across extended temperature ranges.
Supply support for MAX1230BETI+ 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, medical, and communications applications, emphasizing integration, reliability, and low-power operation.
The MAX1230BETI+ belongs to Maxim's high-accuracy multichannel ADC product line, engineered specifically for embedded systems needing simultaneous voltage and temperature digitization with minimal external components and autonomous scan capability.
FAQ
What is the maximum sampling rate of the MAX1230BETI+ and under what conditions is it achieved?
The MAX1230BETI+ achieves a maximum sampling rate of 300ksps when using an external clock in clock mode 11 (CKSEL = 11), with SCLK frequency ≤ 4.8MHz and CS held high between sets of eight clock cycles. This mode disables internal averaging and scanning but enables highest throughput for time-critical acquisition. Internal clock modes limit rate to ~270ksps due to oscillator tolerance.
Does the MAX1230BETI+ require an external reference, or does it include an internal one?
The MAX1230BETI+ includes a factory-trimmed internal 4.096V reference with ±20ppm/°C temperature coefficient and 200µVRMS noise. It can operate fully autonomously using this reference for both voltage and temperature conversions. An external differential reference may be applied via REF+ and REF− pins if higher precision or custom scaling is required.
How many analog input channels does the MAX1230BETI+ support, and what configurations are available?
The MAX1230BETI+ supports 16 single-ended analog inputs (AIN0–AIN15) or 8 true differential pairs (e.g., AIN0/AIN1, AIN12/AIN13). Configuration is controlled via the setup register: single-ended mode references inputs to GND; differential mode rejects common-mode noise and supports unipolar (0 to VREF) or bipolar (±VREF/2) ranges.
What is the accuracy and resolution of the integrated temperature sensor in the MAX1230BETI+?
The MAX1230BETI+ integrated temperature sensor provides ±1.2°C accuracy over the full -40°C to +85°C operating range, with 1/8°C resolution (0.125°C step size) delivered in two's complement format. Temperature measurements always use the internal reference and are stored in the FIFO alongside ADC results.
Can the MAX1230BETI+ operate in low-power modes, and how is power consumption reduced?
Yes, the MAX1230BETI+ features AutoShutdown™, reducing supply current to 0.2µA during idle periods. Power is further optimized via configurable clock modes - e.g., clock mode 00 uses internal timing with hardware-triggered conversion, minimizing serial bus activity. At 300ksps with internal reference, typical IDD is 2.3mA.
MAX1230BETI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1230BETI+ FAQ
1.How can I place an order for MAX1230BETI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1230BETI+ 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 MAX1230BETI+ reliable?
The price and inventory of MAX1230BETI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1230BETI+ is usually 5 days.
3.What payment methods are accepted for MAX1230BETI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1230BETI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1230BETI+?
MAX1230BETI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1230BETI+ 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 MAX1230BETI+?
For technical support, including MAX1230BETI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1230BETI+ requirements.
6.How does Aetrix verify that MAX1230BETI+ is sourced from the original manufacturer or authorized distributors?
All MAX1230BETI+ 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 MAX1230BETI+ meets industry standards.
7.What is the process for return or replacement of MAX1230BETI+?
All MAX1230BETI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1230BETI+, 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 MAX1230BETI+ part is unused and in its original packaging.
Return procedure for MAX1230BETI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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