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Analog Devices Inc./Maxim Integrated MAX1230ACEG+
- Part No.:
- MAX1230ACEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1230ACEG+.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
The MAX1230ACEG+ 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 configurable 16-channel single-ended or 8-channel true differential input capability. It operates from a single +5V supply, supports SPI/QSPI/MICROWIRE-compatible 3-wire interface up to 10MHz, and is specified for industrial temperature range (–40°C to +85°C).
For engineers reviewing the MAX1230ACEG+ datasheet, MAX1230ACEG+ pinout, MAX1230ACEG+ application, or MAX1230ACEG+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in system supervision and patient monitoring, and validated alternative options for multichannel precision data acquisition.
Technical Context
The MAX1230ACEG+ implements a fully differential successive-approximation register (SAR) architecture with on-chip track-and-hold, supporting 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 AutoShutdown™.
It features a 16-deep FIFO buffer that stores both ADC results and temperature measurements, allowing burst acquisition without serial bus contention. The device uses an internal 4.096V reference (±20ppm/°C TC) or accepts external differential references, with dedicated REF+ and REF− pins configurable as analog inputs when not used for reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB INL/DNL accuracy with no missing codes over temperature. |
| Sampling Rate | 300ksps max - achievable only with external clocking (CKSEL = 11); internal clock supports lower rates. |
| Input Channels | 16 single-ended or 8 true differential - full channel set available only on MAX1230, not MAX1226/MAX1228. |
| Temperature Sensor | ±0.7°C error at +25°C - integrated sensor provides 1/8°C resolution in two's complement format. |
| Reference | Internal 4.096V ±20ppm/°C - eliminates need for external reference; REF+/REF− pins support external differential reference. |
| Interface | 10MHz 3-wire SPI/QSPI/MICROWIRE - compatible with standard microcontroller peripherals; CS-active-low, DOUT tri-state. |
| Supply Current | 2.3mA at 300ksps - low-power operation suitable for battery-backed or energy-constrained systems. |
| Operating Temp | –40°C to +85°C - qualified for industrial and medical environments without derating. |
Pinout & Package
The MAX1230ACEG+ is packaged in a 28-pin 5mm × 5mm thin QFN with exposed pad (EP), where EP must be connected to GND for thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN15 | Analog Input Multiplexer Terminals | 16 configurable inputs; each can serve as single-ended channel or differential pair (e.g., AIN0/AIN1); AIN12–AIN15 exclusive to MAX1230. |
| REF+/REF− | Differential Reference Inputs | Accept external reference; when unused, REF− doubles as AIN14 and REF+ as AIN15 per setup register configuration. |
| CNVST/AIN15 | Active-Low Conversion Start / Analog Input | In clock modes 00/01, CNVST initiates conversion; in other modes, AIN15 functions as analog input - mutually exclusive usage. |
| SCLK, DIN, DOUT, CS | 3-Wire Serial Interface | Fully SPI/QSPI/MICROWIRE-compatible; DOUT active on falling SCLK edge; CS enables serial interface and controls DOUT tri-state. |
| EOC | End-of-Conversion Indicator | Active-low pulse signals completion of last requested operation; behavior varies by clock mode (e.g., per-scan vs. per-conversion). |
| VDD, GND, EP | Power and Ground | +5V supply with 0.1µF bypassing required; EP is internally tied to GND and must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 16-entry FIFO | Enables autonomous multi-channel acquisition without CPU intervention; prevents data loss during serial bus contention. |
| Configurable scan & averaging | Programmable NSCAN and NAVG registers allow flexible channel sequencing and noise reduction via hardware averaging (up to 16 samples). |
| True differential T/H architecture | Rejects common-mode noise and DC offsets; supports bipolar input ranges (±VREF/2) with two's complement output format. |
| AutoShutdown™ mode | Reduces supply current to ≤5µA during idle periods - critical for portable and low-duty-cycle monitoring applications. |
| Internal temperature sensor | Monitors die temperature with ±0.7°C accuracy at +25°C; measurement always uses internal reference, independent of external VREF selection. |
Applications
| System Supervision | Patient Monitoring |
|---|---|
Use Scenario: Real-time voltage, current, and temperature monitoring of power rails and thermal zones in industrial PLCs and server management units. IC Role / Device Role / Timing Role: Primary multichannel ADC capturing analog sensor outputs and internal die temperature at up to 300ksps with FIFO buffering. Use Value: Eliminates need for external reference and discrete temperature sensor; reduces BOM count and layout area while maintaining ±1 LSB linearity. | Use Scenario: Acquisition of biopotential signals (ECG, EEG) and environmental parameters (skin temperature, ambient humidity) in portable diagnostic devices. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple analog front-end channels with true differential inputs to suppress EMI and motion artifacts. Use Value: 16-channel flexibility supports modular sensor expansion; internal FIFO allows burst capture during wireless transmission gaps. |
| Data Logging | Industrial Control Systems |
Use Scenario: Battery-powered field instruments logging temperature, pressure, and vibration over extended periods using low-duty-cycle sampling. IC Role / Device Role / Timing Role: Low-power ADC performing periodic conversions with AutoShutdown™ between samples; internal temperature sensor validates calibration stability. Use Value: 2.3mA active current and ≤5µA shutdown current extend battery life; integrated reference ensures consistent accuracy across temperature swings. | Use Scenario: Closed-loop feedback in motor drives and HVAC controllers requiring synchronized sampling of current sense, position, and thermal feedback. IC Role / Device Role / Timing Role: High-precision ADC providing time-aligned digital representations of analog control loop variables with minimal latency. Use Value: Scan mode and internal clock enable deterministic acquisition timing; ±1 LSB INL guarantees repeatability in PID computation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500ksps, SPI interface, internal 4.096V ref, 8-channel, –40°C to +125°C rating | Higher resolution and speed but fewer channels; wider temp range suits automotive under-hood use | Select when 16-bit resolution and extended temperature tolerance outweigh 16-channel requirement |
| AD7949BCPZ-RL7 | 14-bit, 250ksps, SPI interface, no internal ref (requires external), 8-channel, –40°C to +85°C | Lacks integrated temperature sensor and internal reference; requires external 4.096V ref and thermal sensing circuitry | Choose when system already includes precision reference and separate temperature IC, enabling cost-optimized BOM |
Compared with ADS8688IPWR and AD7949BCPZ-RL7, the MAX1230ACEG+ uniquely combines 16 analog inputs, integrated temperature sensing, and internal reference in a single 28-pin QFN - reducing component count and board space for compact industrial data loggers and embedded supervisory systems.
Availability
The MAX1230ACEG+ 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 RoHS-compliant packaging.
Supply support for MAX1230ACEG+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.
The MAX1230ACEG+ belongs to Maxim's precision data-acquisition product line, engineered for applications demanding multichannel, low-power, and self-contained analog-to-digital conversion with integrated diagnostics and thermal awareness.
FAQ
What is the maximum sampling rate of the MAX1230ACEG+ and under what conditions is it achieved?
The MAX1230ACEG+ achieves its maximum sampling rate of 300ksps only when configured in externally clocked mode (CKSEL1/CKSEL0 = 11) with SCLK up to 10MHz. In internal clock modes (00, 01, 10), the effective sampling rate is lower due to oscillator tolerance (±10%) and added overhead from FIFO management and temperature measurement. The 300ksps specification assumes optimal timing, no averaging, and no temperature readback - all confirmed in the Electrical Characteristics table of the MAX1230ACEG+ datasheet.
Does the MAX1230ACEG+ require an external reference, or does it include one internally?
The MAX1230ACEG+ includes a precision internal 4.096V reference with ±20ppm/°C temperature coefficient, eliminating the need for an external reference in most applications. REF+ and REF− pins support optional external differential reference configurations, but when unused, they function as analog inputs AIN15 and AIN14 respectively. All temperature measurements within the MAX1230ACEG+ exclusively use the internal reference, regardless of voltage conversion reference selection.
How many analog input channels does the MAX1230ACEG+ support, and are they configurable for differential operation?
The MAX1230ACEG+ supports 16 single-ended analog input channels (AIN0–AIN15) or 8 true differential pairs (e.g., AIN0/AIN1, AIN2/AIN3, ..., AIN14/AIN15). Configuration is performed via the setup register - DIFFSEL bits select differential mode, and unipolar/bipolar registers define input range. Channels AIN12–AIN15 are exclusive to the MAX1230ACEG+ and unavailable on MAX1226/MAX1228 variants, as explicitly stated in the Pin Description and Feature tables.
What is the function of the FIFO buffer in the MAX1230ACEG+, and how does it improve system design?
The MAX1230ACEG+ integrates a 16-entry FIFO that stores both ADC conversion results and temperature measurements. This allows the device to autonomously perform multiple conversions (including scan sequences and temperature reads) without requiring continuous CPU polling or serial bus access. As a result, the MAX1230ACEG+ reduces microcontroller interrupt load, enables deterministic acquisition timing, and prevents data loss during bus contention - a key advantage in real-time embedded systems where the MAX1230ACEG+ serves as the primary data acquisition engine.
Is the MAX1230ACEG+ pin-compatible with other members of the MAX1226/MAX1228/MAX1230 family, such as the MAX1228?
No, the MAX1230ACEG+ is not pin-compatible with the MAX1228 or MAX1226. While all three share the same functional architecture and serial interface, the MAX1230ACEG+ is offered in a 28-pin thin QFN package (and 24-pin QSOP), whereas the MAX1228 is only available in 20-pin QSOP and the MAX1226 in 16-pin QSOP. Pin counts, layouts, and channel allocations differ significantly - for example, AIN12–AIN15 and associated REF−/CNVST multiplexing exist only on the MAX1230ACEG+ and have no physical counterparts on the smaller packages.
MAX1230ACEG+ 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:
- Obsolete
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1230ACEG+ FAQ
1.How can I place an order for MAX1230ACEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1230ACEG+ 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 MAX1230ACEG+ reliable?
The price and inventory of MAX1230ACEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1230ACEG+ is usually 5 days.
3.What payment methods are accepted for MAX1230ACEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1230ACEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1230ACEG+?
MAX1230ACEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1230ACEG+ 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 MAX1230ACEG+?
For technical support, including MAX1230ACEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1230ACEG+ requirements.
6.How does Aetrix verify that MAX1230ACEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1230ACEG+ 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 MAX1230ACEG+ meets industry standards.
7.What is the process for return or replacement of MAX1230ACEG+?
All MAX1230ACEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1230ACEG+, 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 MAX1230ACEG+ part is unused and in its original packaging.
Return procedure for MAX1230ACEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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