Analog Devices Inc./Maxim Integrated MAX1230BCEG+T

Overview

The MAX1230BCEG+T from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±0.7°C accuracy at +25°C), 16-entry FIFO, internal 4.096V reference, and true differential track-and-hold. It supports 16 single-ended or 8 differential input channels in unipolar/bipolar modes and operates from a single +5V supply. It targets precision data acquisition in industrial control and patient monitoring systems.

For engineers reviewing the MAX1230BCEG+T datasheet, MAX1230BCEG+T pinout, MAX1230BCEG+T application, or MAX1230BCEG+T equivalent, key selection considerations include its 16-channel count, internal FIFO buffering for burst sampling, ±1 LSB INL/DNL performance over –40°C to +85°C, SPI/QSPI/MICROWIRE-compatible 10MHz interface, and on-chip temperature sensing with 1/8°C resolution.

Technical Context

The MAX1230BCEG+T uses a fully differential successive-approximation register (SAR) architecture with on-chip track-and-hold, enabling both single-ended and true differential input configurations. Its internal oscillator supports clock modes 00, 01, and 10 for internally timed conversions up to 300ksps, while clock mode 11 enables externally clocked operation.

It integrates a 16-deep FIFO that stores ADC results and one temperature reading, allowing autonomous multi-channel scanning without serial bus contention. The device implements AutoShutdown™, reducing supply current to ≤5µA in shutdown mode, and supports internal averaging across configurable numbers of samples per result.

Key Specifications

Pinout & Package

The MAX1230BCEG+T is housed in a 28-pin 5mm × 5mm thin QFN package with exposed pad (EP), requiring connection to ground for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel SAR ADC applications.

Compared with ADS8688IPWR and AD7928BRUZ, the MAX1230BCEG+T uniquely combines 16-channel count, on-chip FIFO, integrated temperature sensor, and internal reference in a single +5V-supply device-reducing system-level component count and calibration complexity for embedded data acquisition.

Availability

The MAX1230BCEG+T is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, data logging in harsh environments, and test & measurement equipment requiring stable component supply across extended temperature ranges.

Supply support for MAX1230BCEG+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 MAX1230BCEG+T belongs to Maxim's high-accuracy, low-power SAR ADC product line, engineered for embedded data acquisition systems needing multichannel digitization, on-chip intelligence, and thermal awareness without external support components.

FAQ

What is the operating temperature range specified for the MAX1230BCEG+T?

The MAX1230BCEG+T is specified over the extended industrial temperature range of –40°C to +85°C. All key specifications-including ±1 LSB INL/DNL, 73dB SINAD, and ±0.7°C temperature sensor accuracy at +25°C-are guaranteed across this range. The device uses grade-B screening and is packaged in a RoHS-compliant 28-pin thin QFN with exposed pad.

Does the MAX1230BCEG+T require an external reference voltage?

No, the MAX1230BCEG+T includes a factory-trimmed internal 4.096V reference with ±20ppm/°C temperature coefficient, eliminating the need for an external reference in most applications. An external differential reference can be applied via REF+ and REF− pins if higher precision or custom scaling is required-but doing so disables the internal reference and temperature sensor functionality.

How many analog input channels does the MAX1230BCEG+T support, and how are they configured?

The MAX1230BCEG+T supports 16 single-ended analog inputs (AIN0–AIN15) or 8 true differential pairs (e.g., AIN0/AIN1, AIN2/AIN3, ..., AIN14/AIN15). Configuration is controlled via the setup register: bits DIFFSEL1/DIFFSEL0 select differential mode, and unipolar/bipolar registers determine input range. AIN12–AIN15 are exclusive to the MAX1230 family and unavailable on MAX1226/MAX1228.

What is the function of the FIFO buffer in the MAX1230BCEG+T, and how deep is it?

The MAX1230BCEG+T contains a 16-entry first-in/first-out (FIFO) buffer that stores 12-bit ADC conversion results and one temperature reading. This allows the device to autonomously perform multiple conversions-such as scanning all 16 channels or executing internal averaging-without occupying the SPI bus. When full, new results overwrite the oldest entries, ensuring continuous data capture in time-critical applications.

Can the MAX1230BCEG+T perform temperature measurements simultaneously with analog voltage conversions?

Yes-the MAX1230BCEG+T can interleave temperature measurements with analog conversions within the same scan sequence. Writing TEMP = 1 in the conversion register triggers a die temperature reading, which occupies one FIFO slot and appears as a two's complement value with 1/8°C resolution. Temperature results are always acquired using the internal reference and are stored alongside voltage data, enabling real-time thermal calibration of analog signal chains.