Analog Devices Inc./Maxim Integrated MAX1082ACUE+T

Overview

MAX1082ACUE+T from Maxim Integrated is a 10-bit, 4-channel serial analog-to-digital converter (ADC) with internal +2.5V reference, 400ksps sampling rate, and single +4.5V to +5.5V supply operation. It integrates a track/hold circuit, 4-channel analog multiplexer, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. Used in portable data loggers for high-accuracy voltage monitoring under battery-constrained conditions.

For engineers reviewing the MAX1082ACUE+T datasheet, MAX1082ACUE+T pinout, MAX1082ACUE+T application, or MAX1082ACUE+T equivalent, this page delivers verified electrical specs, real-world timing behavior, power-mode trade-offs, and validated alternative options - all confirmed against Maxim's official 19-1690 Rev 2 datasheet and ordering documentation.

Technical Context

The MAX1082ACUE+T employs successive-approximation register (SAR) architecture with integrated track-and-hold, supporting software-configurable unipolar/bipolar and single-ended/pseudo-differential input modes. Its internal reference buffer provides ±1.5% adjustment range around 2.500V (±10mV typical), and conversion is clocked externally via SCLK (up to 6.4MHz).

It features four distinct power modes - normal (2.5mA), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA) - with automatic wake-up on serial interface access. The device uses a 12-clock conversion cycle and requires ≤120µs total conversion time to prevent T/H droop-induced error.

Key Specifications

Pinout & Package

MAX1082ACUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin functions are electrically validated per Maxim's 19-1690 Rev 2 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit, multi-channel, serial ADC applications.

Compared with ADS7822U and MAX11131ETE+, the MAX1082ACUE+T uniquely balances 10-bit precision, 5V compatibility, integrated 2.5V reference, and flexible input configuration - making it optimal for cost-sensitive, battery-operated 5V systems requiring field-calibration-free performance across 0°C to +70°C.

Availability

MAX1082ACUE+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered instruments requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for MAX1082ACUE+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 consumer applications - emphasizing integration, reliability, and ease of use.

The MAX1082/MAX1083 family was engineered for compact, low-power data acquisition systems needing multi-channel sampling without external references or complex support circuitry - targeting handheld test equipment and portable diagnostics.

FAQ

What is the maximum sampling rate of the MAX1082ACUE+T?

The MAX1082ACUE+T achieves a maximum sampling rate of 400ksps under specified conditions: VDD = +4.5V to +5.5V, fSCLK = 6.4MHz, and 50% duty cycle. This rate is sustained across its full operating temperature range (0°C to +70°C) and requires ≤120µs total conversion time to avoid T/H droop errors. The MAX1082ACUE+T does not support higher rates even with faster clocks due to fixed 12-clock conversion cycle timing.

Does the MAX1082ACUE+T require an external reference voltage?

No, the MAX1082ACUE+T includes an internal +2.500V ±10mV reference buffer, eliminating the need for an external reference in most applications. An external reference (1V to VDD) may be used by disabling the internal buffer via REFADJ, but doing so forfeits the ±1.5% adjustability and increases system component count. The MAX1082ACUE+T reference is fully characterized and temperature-compensated per Maxim's 19-1690 Rev 2 datasheet.

How many power modes does the MAX1082ACUE+T support, and what are their current draws?

The MAX1082ACUE+T supports four software-selectable power modes: normal (2.5mA at 400ksps), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA). All modes retain register state except full power-down, which resets on wake-up. Power mode selection is controlled via PD1/PD0 bits in the 8-bit control byte. The MAX1082ACUE+T automatically wakes from any power-down mode upon CS assertion or serial interface activity.

Can the MAX1082ACUE+T interface directly with a TMS320-series DSP?

Yes, the MAX1082ACUE+T supports direct connection to TMS320-family DSPs via its dedicated SSTRB (serial strobe) output, which pulses high for one SCLK period before the MSB decision - enabling precise synchronous data capture. No external logic or timing adjustment is required. The MAX1082ACUE+T's 4-wire SPI-compatible interface aligns with TMS320 McBSP timing requirements when configured with CPOL = 0 and CPHA = 0.

What is the input voltage range for single-ended operation on the MAX1082ACUE+T?

In single-ended mode, the MAX1082ACUE+T accepts input voltages from GND to VDD1 (i.e., 0V to +5.5V) on CH0–CH3, with COM grounded or set to a stable reference. For full-scale accuracy, inputs must stay within GND + 50mV to VDD1 – 50mV; excursion beyond this risks clipping or nonmonotonic behavior. Input protection diodes clamp to GND and VDD1, allowing transient overvoltage up to ±0.3V - but sustained overvoltage above limits degrades INL and DNL performance.