Analog Devices Inc./Maxim Integrated MAX1230BCEG+

Overview

The MAX1230BCEG+ 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+ datasheet, MAX1230BCEG+ pinout, MAX1230BCEG+ application, or MAX1230BCEG+ equivalent, key selection criteria include its 16-channel multiplexing capability, on-chip FIFO for burst sampling, internal temperature sensing without external components, and SPI/QSPI/MICROWIRE-compatible 10MHz serial interface with support for scan mode and internal averaging.

Technical Context

The MAX1230BCEG+ implements a fully differential successive-approximation register (SAR) ADC architecture with integrated track-and-hold, enabling simultaneous sampling of differential pairs (e.g., AIN0/AIN1, AIN12/AIN13). Its internal oscillator supports clock modes 00–10 for autonomous conversions, while clock mode 11 enables externally timed acquisitions up to 300ksps using SCLK.

It features configurable input routing via setup registers: CHSEL bits select active channels; SCAN bits enable scanning across up to 16 channels; TEMP bit triggers integrated temperature measurement; and CKSEL bits define timing source (internal vs. external). The FIFO stores up to 16 voltage results plus one temperature result, each as two-byte words with MSB-first output.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8688IPWR and AD7949BCPZ-RL7, the MAX1230BCEG+ uniquely combines 16-channel count, integrated temperature sensing, and 16-deep FIFO in a single +5V device-enabling compact, self-contained data acquisition nodes without external support components.

Availability

The MAX1230BCEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and environmental data logging requiring stable component supply and long-term production continuity.

Supply support for MAX1230BCEG+ 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 demanding industrial, medical, and communications applications.

The MAX1230BCEG+ belongs to Maxim's high-performance data acquisition product line, engineered for systems requiring multichannel, low-power, and integrated sensor functionality without external reference or temperature components.

FAQ

What is the maximum sampling rate supported by the MAX1230BCEG+?

The MAX1230BCEG+ supports a maximum sampling rate of 300ksps when using an external clock source in clock mode 11. This rate is achieved with SCLK up to 10MHz and requires proper timing alignment per the serial interface specification. Internally clocked modes deliver lower effective rates due to oscillator tolerance and overhead.

Does the MAX1230BCEG+ require an external reference voltage?

No, the MAX1230BCEG+ includes an internal 4.096V reference with ±1.7% initial accuracy and ±20ppm/°C temperature coefficient. An external reference may be used via REF+ and REF- pins for improved stability, but it is not required. The internal reference is mandatory for temperature measurements.

How many analog input channels does the MAX1230BCEG+ support in differential mode?

The MAX1230BCEG+ supports eight true differential input channels (AIN0/AIN1 through AIN14/AIN15), enabled by configuring the setup register. Each pair shares common-mode rejection and full-scale range of ±VREF/2 in bipolar mode, making it suitable for current-sense and bridge sensor applications.

What is the function of the exposed pad (EP) on the MAX1230BCEG+ package?

On the MAX1230BCEG+, the exposed pad (EP) is internally connected to GND and must be soldered to a large PCB ground plane. It serves exclusively for thermal dissipation-not electrical signaling-and improves junction-to-board thermal resistance by up to 40%, critical for maintaining performance at 300ksps continuous operation.

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

Yes, the MAX1230BCEG+ can interleave temperature measurements with analog channel conversions using the FIFO. When the TEMP bit is set in the conversion register, one temperature result (16-bit two's complement, 1/8°C resolution) is inserted into the FIFO alongside voltage results, allowing synchronized thermal context for acquired data.