Analog Devices Inc./Maxim Integrated MAX1030BCTI+

Overview

MAX1030BCTI+ from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±0.7°C accuracy at +25°C), 16-entry FIFO, and internal 4.096V reference. It supports 16 single-ended or 8 true differential input channels in unipolar/bipolar modes, operates from a single +5V supply, and interfaces via 10MHz SPI/QSPI/MICROWIRE-compatible 3-wire serial port. It is used in industrial control systems for multichannel voltage and temperature monitoring.

For engineers reviewing the MAX1030BCTI+ datasheet, MAX1030BCTI+ pinout, MAX1030BCTI+ application, or MAX1030BCTI+ equivalent, this page delivers verified technical context, exact pin functions for the 28-pin TQFN package, real-world application mappings, and two confirmed alternative parts with documented functional and packaging differences - all grounded in Maxim's official datasheet Rev 4 (April 2011).

Technical Context

The MAX1030BCTI+ uses a fully differential successive-approximation register (SAR) architecture with on-chip track-and-hold, supporting both single-ended and true differential acquisition. Its internal oscillator enables autonomous conversion timing in clock modes 00/01/10, while mode 11 accepts external SCLK up to 10MHz for precise 300ksps sampling.

It integrates an analog multiplexer, 16-deep FIFO buffer, internal averaging (up to 4×), AutoShutdown™, and a calibrated silicon temperature sensor referenced to its internal 4.096V bandgap. All conversions - including temperature - use the internal reference; external differential reference is optional and disables internal reference operation.

Key Specifications

Pinout & Package

The MAX1030BCTI+ is packaged in a 28-pin 5mm × 5mm TQFN with exposed pad (EP), RoHS-compliant and lead-free. The exposed pad must be soldered to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1030BCTI+, ADS7953IRHBT offers higher speed and resolution but requires external temperature sensing and reference design, while AD7946BCPZ-RL7 provides superior DC accuracy at the cost of losing FIFO buffering, true differential support, and integrated thermal monitoring - making MAX1030BCTI+ uniquely suited for compact, self-contained multichannel monitoring where size, power, and thermal awareness are co-constrained.

Availability

MAX1030BCTI+ is available at Aetrix Electronics and suitable for industrial control systems, patient monitoring devices, and environmental data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1030BCTI+ 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 RF ICs for industrial, medical, and communications applications, emphasizing integration, reliability, and low-power operation.

The MAX1026/MAX1028/MAX1030 product line was engineered specifically for space-constrained, multichannel data acquisition systems needing simultaneous voltage and temperature measurement - delivering ADC, FIFO, reference, and sensor in one 5mm × 5mm package.

FAQ

What is the maximum sampling rate of the MAX1030BCTI+ and under what conditions is it achieved?

The MAX1030BCTI+ achieves a maximum sampling rate of 300ksps when using an external clock in clock mode 11 (CKSEL1/CKSEL0 = 11) with SCLK up to 10MHz. This requires CS held high between each set of eight SCLK cycles and disables internal averaging and scan mode. Internally clocked modes deliver lower sustained rates due to oscillator tolerance and overhead.

Does the MAX1030BCTI+ support true differential input, and how many differential channels does it provide?

Yes, the MAX1030BCTI+ supports true differential input across eight independent pairs: AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7, AIN8/AIN9, AIN10/AIN11, AIN12/AIN13, and AIN14/AIN15. Each pair can be independently configured for unipolar or bipolar differential operation via the setup register - a capability not available on MAX1026 or MAX1028.

How is the internal temperature sensor of the MAX1030BCTI+ calibrated, and what is its accuracy specification?

The MAX1030BCTI+ internal temperature sensor is factory-calibrated to ±0.7°C accuracy at +25°C (Grade B). Over the full -40°C to +85°C operating range, measurement error is ±1.2°C (typical) to ±3.0°C (max), with 1/8°C digital resolution in two's complement format. Temperature readings always use the internal reference and cannot be overridden by external REF.

Can the MAX1030BCTI+ operate with an external reference, and what are the voltage limits for REF+ and REF−?

Yes, the MAX1030BCTI+ supports external differential reference via REF+ and REF− pins. REF+ accepts 1.0V to VDD + 50mV (i.e., up to +5.3V at VDD = +5.25V); REF− accepts 0V to 500mV. Using external reference disables the internal 4.096V reference and reduces supply current - but temperature measurements remain tied to the internal reference regardless of voltage source selection.

What package type is used for the MAX1030BCTI+, and is the exposed pad electrically connected?

The MAX1030BCTI+ is supplied in a 28-pin 5mm × 5mm TQFN package with exposed pad (EP). The exposed pad is electrically connected to GND and must be soldered to a PCB ground plane for proper thermal dissipation, noise immunity, and device reliability - it is not optional or floating.