Analog Devices Inc./Maxim Integrated MAX1029BCEP+T

Overview

MAX1029BCEP+T from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor, internal 2.5V reference, and 16-entry FIFO. It supports 12 single-ended or 6 true differential input channels, operates from a +3V supply, and delivers ±1 LSB INL/DNL accuracy over 0°C to +70°C - used in industrial data acquisition and system supervision where compact multichannel sensing is required.

For engineers reviewing the MAX1029BCEP+T datasheet, MAX1029BCEP+T pinout, MAX1029BCEP+T application, or MAX1029BCEP+T equivalent, key selection criteria include its QSOP-20 package, SPI/QSPI/MICROWIRE-compatible 10MHz interface, internal temperature measurement (±0.7°C at +25°C), unipolar/bipolar input configuration flexibility, and low-power 1mA operation at full sampling rate.

Technical Context

The MAX1029BCEP+T implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both single-ended and true differential inputs across 12 configurable analog channels. Its internal oscillator enables autonomous scan mode with programmable averaging and FIFO buffering.

It integrates a calibrated temperature sensor with 1/8°C resolution and ±1.2°C error over temperature, always referenced to its internal 2.5V reference (±30ppm/°C TC). Conversion timing is selectable via four clock modes - including CNVST-triggered, internally timed, and externally clocked (up to 300ksps) - with EOC signaling and 3-wire serial control.

Key Specifications

Pinout & Package

MAX1029BCEP+T is housed in a 20-pin QSOP (Quarter Size Outline Package) with 0.65mm lead pitch and exposed pad not present (TQFN variant applies only to MAX1031). The package is RoHS-compliant and tape-and-reel ready (T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and AD7490BRUZ, the MAX1029BCEP+T uniquely combines 10-bit accuracy, 12-channel flexibility, on-chip temperature sensing, and FIFO buffering in a 20-QSOP package - making it optimal for compact, self-contained monitoring nodes where integration reduces design risk and BOM complexity.

Availability

MAX1029BCEP+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, environmental data loggers, and embedded system supervision requiring stable component supply and long-term manufacturability.

Supply support for MAX1029BCEP+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 and mixed-signal ICs for demanding industrial, medical, and communications applications - emphasizing integration, reliability, and low-power operation.

The MAX1027/MAX1029/MAX1031 family was engineered for compact, multichannel data acquisition in space-constrained systems - integrating ADC, FIFO, temperature sensor, and reference to replace discrete signal chains in supervisory and measurement roles.

FAQ

What is the operating temperature range for MAX1029BCEP+T?

The MAX1029BCEP+T is specified for 0°C to +70°C operation (C-grade). This commercial temperature range aligns with its "BCEP" ordering code, distinguishing it from the extended-range "BEEP" variant (-40°C to +85°C). All electrical specifications - including INL, DNL, reference stability, and temperature sensor accuracy - are guaranteed within this range. The internal temperature sensor maintains ±0.7°C accuracy at +25°C and ±1.2°C across the full 0°C to +70°C span.

Does MAX1029BCEP+T require an external reference voltage?

No, the MAX1029BCEP+T includes a factory-trimmed 2.50V ±10mV internal reference with ±30ppm/°C temperature coefficient, eliminating the need for external reference components in most applications. An external differential reference can be applied between REF+ and REF− if higher precision or custom full-scale range is required, but doing so disables the internal reference and temperature sensor functionality. The internal reference is always used for temperature measurements.

How many analog input channels does MAX1029BCEP+T support?

The MAX1029BCEP+T supports 12 single-ended analog inputs (AIN0–AIN11) or 6 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.). This is fixed per the MAX1029 variant - distinct from the 8-channel MAX1027 and 16-channel MAX1031. Channel configuration (single-ended vs. differential, unipolar vs. bipolar) is controlled via the setup and mode registers, and certain pins (REF−/AIN10, CNVST/AIN11) serve dual functions depending on register settings.

What package type is used for MAX1029BCEP+T?

The MAX1029BCEP+T uses a 20-pin QSOP (Quarter Size Outline Package) with standard 0.65mm lead pitch and RoHS-compliant lead finish. The "P" in the part number denotes QSOP packaging, differentiating it from TQFN variants used exclusively by the MAX1031. The package has no exposed thermal pad, and pin 1 is marked by a notch or dot per JEDEC standards. Footprint dimensions and soldering profiles follow standard QSOP-20 specifications.

Can MAX1029BCEP+T perform simultaneous sampling of multiple channels?

No, the MAX1029BCEP+T performs sequential sampling using a single SAR core and analog multiplexer - it does not support true simultaneous sampling across channels. However, its fast 300ksps maximum rate, 16-entry FIFO, and programmable scan modes enable rapid interleaved acquisition that approximates concurrent sampling for many applications. True differential pairs (e.g., AIN0/AIN1) are sampled simultaneously within each conversion cycle, but channel-to-channel sampling is time-multiplexed.