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Analog Devices Inc./Maxim Integrated MAX1230BETI+T
- Part No.:
- MAX1230BETI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX1230BETI+T.pdf
- Description:
- IC ADC 12BIT SAR 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,493
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Product details
Overview
MAX1230BETI+T 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. It is used in industrial control systems for multichannel voltage and temperature monitoring.
For engineers reviewing the MAX1230BETI+T datasheet, MAX1230BETI+T pinout, MAX1230BETI+T application, or MAX1230BETI+T equivalent, key selection criteria include FIFO depth for burst acquisition, internal temperature sensing accuracy, SPI/QSPI/MICROWIRE interface timing compliance, and 28-pin TQFN thermal performance in extended-temperature embedded systems.
Technical Context
The MAX1230BETI+T implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables internally timed conversions in clock modes 00, 01, and 10, while mode 11 supports externally clocked operation up to 10MHz SCLK.
It features configurable scan sequencing, per-channel unipolar/bipolar mode selection via dedicated registers, and automatic temperature measurement interleaving with analog conversions. The 16-deep FIFO buffers conversion results and temperature data independently, enabling background acquisition without serial bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB INL/DNL accuracy with no missing codes across -40°C to +85°C. |
| Sampling Rate | 300ksps max - achievable only in externally clocked mode (CKSEL=11) with ≤4.8MHz SCLK; internal clock limits to ~275ksps. |
| Input Channels | 16 single-ended or 8 true differential - AIN0–AIN15 mapped to dedicated pins; differential pairs fixed (e.g., AIN0/AIN1, AIN14/AIN15). |
| Internal Reference | 4.096V ±1.7% (4.024V–4.168V) - TCREF ≤ ±20ppm/°C; powers temperature sensor and enables reference-free system design. |
| Temperature Sensor | ±1.2°C error over full range - resolution 0.125°C (1/8°C), noise 0.1°CRMS; always uses internal reference regardless of analog reference source. |
| Digital Interface | 10MHz 3-wire SPI/QSPI/MICROWIRE - supports CPOL=CPHA=0 or 1; DOUT valid on SCLK falling edge; CS-active-low enable. |
| Supply Current | 2.3mA at 300ksps - drops to 0.2–5µA in AutoShutdown™; internal reference active during temp sense increases IDD by ~1mA. |
Pinout & Package
MAX1230BETI+T is housed in a 28-pin 5mm × 5mm thin QFN package with exposed pad (EP), rated for -40°C to +85°C operation. The EP must be soldered to a large ground plane for thermal management and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17, 19, 25 | No Connection | Not internally bonded; leave floating or grounded per layout best practice - no signal routing required. |
| 2–12, 26–28 | AIN0–AIN13 | Analog input channels - support single-ended or differential pairing; AIN14/AIN15 available on pins 13/14. |
| 13 | REF-/AIN14 | Negative reference input or analog channel 14 - function selected via setup register; not simultaneously usable. |
| 14 | CNVST/AIN15 | Active-low conversion start or analog channel 15 - dual-role pin; configured in setup register; pulse width ≥1.4µs for voltage conversion. |
| 15 | REF+ | Positive reference input - requires 0.1µF bypass capacitor to GND; accepts external reference or connects to internal REF output. |
| 16 | GND | Analog/digital ground - common return for VDD, REF+, and all analog inputs; tie EP directly to this node. |
| 18 | VDD | +5V power supply - 4.75V–5.25V range; bypass with 0.1µF ceramic capacitor close to pin. |
| 20 | SCLK | Serial clock input - 40–60% duty cycle required; clocks DIN on rising edge, DOUT on falling edge. |
| 21 | CS | Chip-select input - active-low; enables serial interface and tri-states DOUT when high. |
| 22 | DIN | Serial data input - latched on SCLK rising edge; carries 8-bit command bytes (setup, conversion, averaging registers). |
| 23 | DOUT | Serial data output - outputs 16-bit result (MSB first, 4 leading zeros) on SCLK falling edge; high-impedance when CS = VDD. |
| 24 | EOC | End-of-conversion flag - active-low pulse indicates completion of last requested operation; high in CKSEL=11 mode. |
| EP | Exposed Pad | Internally connected to GND - mandatory thermal and electrical connection to PCB ground plane; not a signal pin. |
Key Features
| Feature | Design Value |
|---|---|
| 16-entry FIFO buffer | Stores up to 16 analog results plus one temperature reading - eliminates serial bus blocking during multi-channel scans. |
| True differential track/hold | Supports fixed differential pairs (e.g., AIN0/AIN1) with common-mode rejection - enables noise-immune bipolar measurements without external amplifiers. |
| Integrated temperature sensor | ±1.2°C accuracy over -40°C to +85°C with 0.125°C resolution - calibrated against internal reference, requiring no external components. |
| AutoShutdown™ mode | Reduces supply current to 0.2–5µA between conversions - extends battery life in portable data loggers and remote sensors. |
| Configurable clock modes | Four CKSEL options (00–11) - supports software-triggered, CNVST-pulse-triggered, or externally clocked acquisition with independent scan/averaging control. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous logging of thermocouple voltages, pressure transducer outputs, and ambient temperature in PLC-based factory automation. IC Role / Device Role / Timing Role: Multichannel ADC with integrated temperature sensor performs synchronized voltage and local die temperature sampling every 3.3ms (300ksps ÷ 16 channels). Use Value: Eliminates need for external reference and discrete temperature IC, reducing BOM count and calibration complexity in DIN-rail mounted I/O modules. | Use Scenario: Portable ECG and SpO₂ monitor acquiring lead voltages and skin temperature for artifact correction. IC Role / Device Role / Timing Role: Simultaneous 12-bit sampling of 8 electrode inputs and on-chip temperature at 1ksps per channel using FIFO burst read. Use Value: Internal 4.096V reference ensures stable scaling across battery voltage droop; temperature data enables real-time baseline drift compensation. |
| Data Logger for Environmental Sensors | Test Equipment Signal Conditioning |
Use Scenario: Battery-powered outdoor weather station measuring humidity, barometric pressure, and enclosure temperature over 10-year deployment. IC Role / Device Role / Timing Role: Low-power ADC wakes periodically via CNVST pulse to acquire 16 sensor outputs and internal temperature, then enters AutoShutdown™. Use Value: 2.3mA active current and sub-5µA shutdown current enable >5-year operation on two AA cells; FIFO allows rapid capture before sleep. | Use Scenario: Modular benchtop instrument digitizing analog outputs from calibrated sensors (e.g., strain gauges, RTDs) with traceable reference. IC Role / Device Role / Timing Role: Precision ADC with ±1 LSB INL/DNL and 73dB SINAD provides metrology-grade digitization for front-end signal chains. Use Value: Internal 4.096V reference (±20ppm/°C) meets Class II accuracy requirements without external ovenized reference; SPI interface simplifies FPGA controller integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, temperature-integrated ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500ksps, SPI interface, no integrated temp sensor, external reference required | Better resolution and speed but lacks on-die temperature sensing and internal reference | Choose when higher resolution outweighs need for self-contained temperature monitoring and reference simplicity. |
| AD7949BCPZ-RL7 | 14-bit, 250ksps, SPI, no temp sensor, internal reference only (4.096V), 16-channel | Lower speed and resolution than MAX1230BETI+T; no temperature sensing capability | Choose when 14-bit precision suffices and temperature monitoring is handled externally. |
Compared with ADS8688IPWR and AD7949BCPZ-RL7, the MAX1230BETI+T uniquely integrates a calibrated temperature sensor and internal reference in a single 28-pin TQFN, enabling compact, low-component-count designs for embedded monitoring where simultaneous voltage and temperature acquisition is required.
Availability
MAX1230BETI+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, environmental data loggers, and test equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX1230BETI+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1230BETI+T belongs to Maxim's high-accuracy, multichannel SAR ADC product line, engineered for embedded systems needing integrated temperature sensing, low-power operation, and SPI-compatible digital interfacing without external reference components.
FAQ
What is the maximum sampling rate achievable with the MAX1230BETI+T?
The MAX1230BETI+T achieves a maximum sampling rate of 300ksps only in externally clocked mode (CKSEL1/CKSEL0 = 11) with SCLK ≤ 4.8MHz. In internally clocked modes (00, 01, 10), the effective rate is lower due to oscillator tolerance and overhead. At 300ksps, the MAX1230BETI+T consumes 2.3mA from a +5V supply and maintains ±1 LSB INL/DNL performance across -40°C to +85°C.
Does the MAX1230BETI+T require an external reference voltage?
No, the MAX1230BETI+T includes a factory-trimmed 4.096V internal reference with ±20ppm/°C temperature coefficient and 200µVRMS noise. REF+ can be driven by this internal source or an external differential reference. The internal reference is mandatory for temperature measurements and remains active even when external reference is selected for analog conversions.
How many analog input channels does the MAX1230BETI+T support in differential mode?
The MAX1230BETI+T supports eight true differential input channels: AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7, AIN8/AIN9, AIN10/AIN11, AIN12/AIN13, and AIN14/AIN15. These are hardwired pairs; configuration is done via the setup register. All 16 pins (AIN0–AIN15) are accessible on the 28-pin TQFN package, enabling full 8-channel differential operation.
What is the accuracy of the integrated temperature sensor in the MAX1230BETI+T?
The MAX1230BETI+T's integrated temperature sensor has a measurement error of ±1.2°C over the full -40°C to +85°C operating range, with ±0.7°C typical accuracy at +25°C. It provides 0.125°C (1/8°C) resolution in two's complement format and uses the internal 4.096V reference exclusively - no external components or calibration are needed.
Can the MAX1230BETI+T operate from a single +3.3V supply?
No, the MAX1230BETI+T requires a +5V ±5% supply (4.75V to 5.25V). Its internal reference, SAR core, and digital interface are designed for 5V operation. Attempting to power it from +3.3V will prevent proper reference generation, disable the temperature sensor, and cause communication failures on the SPI interface. For 3.3V systems, level-shifting or a compatible 3.3V ADC (e.g., MAX11100) is required.
MAX1230BETI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX1230BETI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1230BETI+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 MAX1230BETI+T reliable?
The price and inventory of MAX1230BETI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1230BETI+T is usually 5 days.
3.What payment methods are accepted for MAX1230BETI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1230BETI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1230BETI+T?
MAX1230BETI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1230BETI+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 MAX1230BETI+T?
For technical support, including MAX1230BETI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1230BETI+T requirements.
6.How does Aetrix verify that MAX1230BETI+T is sourced from the original manufacturer or authorized distributors?
All MAX1230BETI+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 MAX1230BETI+T meets industry standards.
7.What is the process for return or replacement of MAX1230BETI+T?
All MAX1230BETI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1230BETI+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 MAX1230BETI+T part is unused and in its original packaging.
Return procedure for MAX1230BETI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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