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Analog Devices Inc./Maxim Integrated MAX1230BEEG+
- Part No.:
- MAX1230BEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1230BEEG+.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
MAX1230BEEG+ from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±0.7°C accuracy), 16-entry FIFO, internal 4.096V reference, and SPI/QSPI/MICROWIRE-compatible interface. It features 16 single-ended or 8 true differential analog input channels, operates from a single +5V supply, and is specified for -40°C to +85°C industrial environments - used in precision system supervision and patient monitoring.
For engineers reviewing the MAX1230BEEG+ datasheet, MAX1230BEEG+ pinout, MAX1230BEEG+ application, or MAX1230BEEG+ equivalent, this page delivers verified specifications, package-validated pin functions, real-world use contexts, and two confirmed alternative parts - all grounded in Maxim's official documentation and pinout diagrams for the 28-pin TQFN variant.
Technical Context
The MAX1230BEEG+ implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both unipolar (0 to VREF) and bipolar (±VREF/2) differential modes plus single-ended operation referenced to GND. Its internal oscillator enables autonomous scan mode with programmable averaging and FIFO buffering.
It integrates an on-die temperature sensor with 1/8°C resolution and ±1.2°C max error over temperature, always using the internal reference. The 3-wire serial interface supports CPOL/CPHA = 0 or 1, with EOC signaling and CS-controlled tri-state DOUT - enabling seamless integration into microprocessor-based data acquisition systems without 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 maximum - achievable only in externally clocked mode (CKSEL=11) with ≤4.8MHz SCLK. |
| Analog Inputs | 16 single-ended or 8 true differential channels - configurable per setup register; AIN12–AIN15 exclusive to MAX1230. |
| Internal Reference | 4.096V ±1.7% (4.024V–4.168V) - TCREF ≤ ±20ppm/°C; powers temperature sensor and supports external reference option. |
| Temperature Sensor | ±0.7°C accuracy at +25°C, ±1.2°C over full range - outputs two's complement code at 1/8°C resolution. |
| Supply Current | 2.3mA at 300ksps (internal ref); 0.2–5µA in AutoShutdown™ - enables low-power battery-operated sensing. |
| Digital Interface | 10MHz SPI/QSPI/MICROWIRE-compatible - 3-wire, MSB-first, supports CPOL=CPHA=0 or 1; EOC active-low status signal. |
Pinout & Package
MAX1230BEEG+ is packaged in a 28-pin 5mm × 5mm thin QFN with exposed pad (EP), RoHS-compliant and lead-free. The EP must be soldered to a large ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17, 19, 25 | N.C. | No internal connection - leave unconnected; not usable as I/O or ground. |
| 2–12, 26–28 | AIN0–AIN13 | Analog input channels - support single-ended or differential pairing (e.g., AIN0/AIN1); AIN12–AIN15 available only on MAX1230. |
| 13 | REF-/AIN14 | Negative reference input or analog channel 14 - dual-function pin; REF- mode disables AIN14 usage. |
| 14 | CNVST/AIN15 | Active-low conversion start or analog channel 15 - configured via setup register; CNVST mode disables AIN15. |
| 15 | REF+ | Positive reference input - requires 0.1µF bypass capacitor to GND; accepts internal or external reference. |
| 16 | GND | Analog/digital ground - common return for VDD, REF+, and analog inputs; connect EP to this node. |
| 18 | VDD | +5V power supply - 4.75V to 5.25V range; bypass with 0.1µF capacitor near pin. |
| 20 | SCLK | Serial clock input - 10MHz max; 40–60% duty cycle required; controls data latching on rising edge. |
| 21 | CS | Active-low chip select - enables serial interface when low; places DOUT in high-impedance state when high. |
| 22 | DIN | Serial data input - 8-bit setup byte (MSB first) latched on SCLK rising edge. |
| 23 | DOUT | Serial data output - 16-bit result (MSB first, 4 leading zeros) clocked on SCLK falling edge. |
| 24 | EOC | End-of-conversion output - active-low pulse signals completion of last requested operation (except CKSEL=11). |
| EP | Exposed Pad | Internally connected to GND - must be soldered to PCB ground plane for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| 16-entry FIFO buffer | Stores up to 16 ADC results + 1 temperature reading - eliminates serial bus contention during multi-channel scans. |
| True differential track-and-hold | Supports 8 differential pairs (e.g., AIN0/AIN1) with common-mode noise rejection - enables accurate bipolar measurements. |
| AutoShutdown™ mode | Reduces supply current to 0.2–5µA - automatically activates after conversion completes, minimizing idle power. |
| Internal temperature sensor | ±0.7°C accuracy at +25°C, 1/8°C resolution - calibrated die temperature measurement independent of external components. |
| Configurable clock modes | Four CKSEL options (00–11) - enable autonomous scanning, CNVST-triggered sampling, or external timing with full 300ksps rate. |
Applications
| System Supervision | Patient Monitoring |
|---|---|
Use Scenario: Real-time voltage, current, and temperature monitoring of power rails and thermal zones in industrial PLCs and telecom equipment. IC Role / Device Role / Timing Role: Primary ADC for multi-point analog sensing with autonomous FIFO-driven burst acquisition and on-chip temperature compensation. Use Value: Eliminates external multiplexer and reference ICs; 16-channel capability reduces board space and BOM count by consolidating sensing functions. |
Use Scenario: Biopotential signal digitization (ECG, EEG) and environmental temperature tracking in portable medical devices. IC Role / Device Role / Timing Role: High-accuracy, low-noise front-end ADC with integrated temp sensor for calibration and safety-critical thermal margining. Use Value: ±0.7°C sensor accuracy and 73dB SINAD enable reliable physiological signal integrity without external calibration hardware. |
| Data Acquisition Systems | Industrial Control Systems |
Use Scenario: Modular DAQ modules acquiring sensor data from thermocouples, RTDs, and strain gauges in lab and field instruments. IC Role / Device Role / Timing Role: Core sampling engine with programmable scan mode, internal averaging, and SPI interface for host MCU coordination. Use Value: 16-entry FIFO allows uninterrupted acquisition while host processes prior data - critical for deterministic real-time logging. |
Use Scenario: Closed-loop feedback control in motor drives and HVAC systems requiring simultaneous voltage, current, and temperature feedback. IC Role / Device Role / Timing Role: Multichannel analog monitor interfacing with FPGA or ARM Cortex-M controller via SPI with EOC handshaking. Use Value: True differential inputs reject common-mode noise from high-power switching circuits; internal reference ensures stable scaling across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel, temperature-sensing ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit, 500ksps, SAR ADC with internal reference and 4-channel MUX; no integrated temperature sensor; requires external temp IC. | Higher resolution and speed, but lacks on-die temperature sensing - adds component count and calibration complexity. | Select when absolute precision >12-bit and sampling >300ksps is required, and temperature is measured separately. |
| AD7949BCPZ-RL7 | 14-bit, 250ksps, 8-channel SAR ADC with internal reference; no FIFO or temperature sensor; SPI interface with BUSY instead of EOC. | Lower channel count (8 vs. 16), no FIFO or temp sensor; simpler control but less autonomous operation. | Choose for cost-sensitive designs where 12-bit resolution and integrated temp sensing are noncritical. |
Compared with MAX1230BEEG+, ADS8684IPWR offers higher resolution and speed but requires external temperature sensing, while AD7949BCPZ-RL7 provides lower channel density and no FIFO - making MAX1230BEEG+ uniquely suited for compact, self-contained 16-channel industrial monitoring with embedded thermal awareness.
Availability
MAX1230BEEG+ is available at Aetrix Electronics and suitable for system supervision, patient monitoring, and industrial control applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX1230BEEG+ 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 - emphasizing integration, reliability, and low-power operation.
The MAX1226/MAX1228/MAX1230 family was engineered to consolidate high-channel-count data acquisition with on-die temperature sensing and FIFO buffering - targeting space-constrained, low-maintenance embedded monitoring systems.
FAQ
What is the maximum sampling rate supported by the MAX1230BEEG+?
The MAX1230BEEG+ 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 rate is limited by the ±10% tolerance of the internal 4.4MHz oscillator and additional overhead for FIFO management and temperature measurement. The MAX1230BEEG+ datasheet specifies 300ksps as the absolute maximum under ideal conditions with external timing.
Does the MAX1230BEEG+ require an external reference voltage?
No, the MAX1230BEEG+ includes a factory-trimmed internal 4.096V reference with ±20ppm/°C temperature coefficient and 200µVRMS noise - sufficient for most precision applications. An external differential reference can be applied between REF+ and REF-/AIN14 if tighter initial accuracy or custom scaling is needed, but the internal reference remains mandatory for temperature sensor operation.
How many analog input channels does the MAX1230BEEG+ support in differential mode?
The MAX1230BEEG+ supports eight true differential analog input pairs: AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7, AIN8/AIN9, AIN10/AIN11, AIN12/AIN13, and AIN14/AIN15. This 8-channel differential capability is exclusive to the MAX1230 variant; MAX1228 supports six pairs, and MAX1226 supports four - confirmed in the Pin Description and Functional Diagram sections of the MAX1230BEEG+ datasheet.
What is the function of the exposed pad (EP) on the MAX1230BEEG+ TQFN package?
The exposed pad (EP) on the MAX1230BEEG+ is internally connected to GND and must be soldered to a large PCB ground plane. It serves dual purposes: thermal dissipation (derating 20.8mW/°C above +70°C) and improved analog noise immunity. Maxim explicitly states EP is "not intended as an electrical connection point" beyond its GND tie - no vias or traces should isolate it from the main ground plane.
Can the MAX1230BEEG+ perform temperature measurements simultaneously with analog conversions?
Yes, the MAX1230BEEG+ can interleave temperature measurements with analog conversions using the FIFO. A temperature reading occupies one FIFO slot and is always acquired using the internal reference - even when external reference is selected for voltage conversions. The temperature result appears as a 16-bit two's complement value with 1/8°C resolution, and is overwritten if a new measurement occurs before the previous one is read from DOUT.
MAX1230BEEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- 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:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1230BEEG+ FAQ
1.How can I place an order for MAX1230BEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1230BEEG+ 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 MAX1230BEEG+ reliable?
The price and inventory of MAX1230BEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1230BEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1230BEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1230BEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1230BEEG+?
MAX1230BEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1230BEEG+ 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 MAX1230BEEG+?
For technical support, including MAX1230BEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1230BEEG+ requirements.
6.How does Aetrix verify that MAX1230BEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1230BEEG+ 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 MAX1230BEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1230BEEG+?
All MAX1230BEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1230BEEG+, 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 MAX1230BEEG+ part is unused and in its original packaging.
Return procedure for MAX1230BEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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