Analog Devices Inc./Maxim Integrated MAX1029BEEP+T

Overview

MAX1029BEEP+T from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C accuracy over –40°C to +85°C), 16-entry FIFO, and internal 2.5V reference. It supports 12 single-ended or 6 true differential input channels in unipolar/bipolar modes, operates from a single +3V supply, and interfaces via 10MHz SPI/QSPI/MICROWIRE-compatible 3-wire serial port.

For engineers reviewing the MAX1029BEEP+T datasheet, MAX1029BEEP+T pinout, MAX1029BEEP+T application, or MAX1029BEEP+T equivalent, this device is selected for embedded system supervision, industrial data acquisition, and patient monitoring where multichannel voltage + on-chip temperature sensing, low-power operation (1mA at 300ksps), and FIFO-buffered conversions are required.

Technical Context

The MAX1029BEEP+T implements a fully differential successive-approximation register (SAR) ADC architecture with integrated track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables autonomous scan mode operation in clock modes 00, 01, and 10 - eliminating external timing dependencies for internally timed conversions.

It features a dedicated 16-deep FIFO that stores up to 16 ADC results plus one temperature reading, enabling burst acquisition without serial bus contention. The internal temperature sensor uses the same 2.5V reference and SAR core as voltage measurements, delivering 1/8°C resolution in two's complement format with ±1.2°C max error across –40°C to +85°C.

Key Specifications

Pinout & Package

MAX1029BEEP+T is housed in a 20-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with lead(Pb)-free/RoHS-compliant finish. The exposed pad is absent - unlike the TQFN variant - confirming its surface-mount QSOP identity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7953IRHBT and AD7923BRUZ, the MAX1029BEEP+T uniquely integrates temperature sensing, FIFO buffering, and internal reference in a 12-channel 10-bit ADC - reducing system-level complexity for thermally aware data acquisition without sacrificing timing autonomy or supply flexibility.

Availability

MAX1029BEEP+T is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and embedded system supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1029BEEP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX1027/MAX1029/MAX1031 product line was designed for compact, low-power data acquisition systems needing integrated temperature sensing, multichannel scanning, and autonomous FIFO-based conversion - targeting space- and energy-constrained embedded applications.

FAQ

What is the operating temperature range of the MAX1029BEEP+T?

The MAX1029BEEP+T is specified for operation from –40°C to +85°C, matching the extended industrial temperature grade denoted by the "E" in its part number. Its internal temperature sensor maintains ±1.2°C accuracy across this full range, and all DC and dynamic specifications (e.g., ±1 LSB INL, 300ksps sampling) are guaranteed within these limits.

Does the MAX1029BEEP+T require an external reference voltage?

No, the MAX1029BEEP+T includes a factory-trimmed internal 2.5V reference with ±0.8% initial accuracy and ±30ppm/°C temperature coefficient - sufficient for most industrial and medical applications. An external differential reference can be applied via REF+ and REF- pins if higher precision or custom voltage scaling is needed, but it is not required for basic operation of the MAX1029BEEP+T.

How many analog input channels does the MAX1029BEEP+T support?

The MAX1029BEEP+T supports 12 single-ended analog inputs (AIN0–AIN11) or 6 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.). This is confirmed by the ordering information table specifying "MAX1029BEEP+T" as the –40°C to +85°C version in 20-pin QSOP, and by the Pin Description table listing AIN0–AIN11 and CNVST/AIN11 as functional inputs.

What is the purpose of the FIFO in the MAX1029BEEP+T?

The 16-entry FIFO in the MAX1029BEEP+T stores ADC conversion results (and one temperature reading) to decouple acquisition from host read operations. This allows the device to perform multiple internally timed conversions - including scan sequences and temperature measurements - without holding the SPI bus, improving system responsiveness and enabling deterministic data capture in interrupt-driven or low-overhead firmware.

Can the MAX1029BEEP+T perform simultaneous sampling of multiple channels?

No, the MAX1029BEEP+T uses a single SAR ADC core with a multiplexer and track-and-hold circuit - it performs sequential sampling, not true simultaneous sampling. However, its fast 300ksps rate and 16-deep FIFO enable rapid scanning of all 12 channels with minimal inter-channel skew, making it suitable for applications where near-simultaneous acquisition (e.g., motor phase currents) is acceptable.