Analog Devices Inc./Maxim Integrated MAX1082BCUE+T

Overview

MAX1082BCUE+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 amplifier, software-configurable unipolar/bipolar and single-ended/pseudo-differential inputs, and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface - used in portable data loggers for high-accuracy sensor digitization.

For engineers reviewing the MAX1082BCUE+T datasheet, MAX1082BCUE+T pinout, MAX1082BCUE+T application, or MAX1082BCUE+T equivalent, this page delivers verified electrical specs, power-mode behavior, timing constraints, and real-world interface guidance - critical for battery-powered instrumentation and medical device signal chains requiring stable 10-bit resolution at ≤400ksps.

Technical Context

The MAX1082BCUE+T employs successive-approximation register (SAR) architecture with integrated track/hold and 4-channel analog multiplexer. Its conversion cycle requires 16 SCLK periods (at up to 6.4MHz), delivering 400ksps throughput with aperture jitter <50ps and acquisition time of 400ns.

It supports four software-selectable power modes: normal (2.5mA), reduced-power (1.3mA), fast power-down (0.9mA), and full power-down (2µA). The internal reference buffer provides ±1.5% adjustment range via REFADJ, and external reference input (1V to VDD) is supported when buffer is disabled.

Key Specifications

Pinout & Package

MAX1082BCUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADS7822U and AD7490BRUZ, the MAX1082BCUE+T uniquely balances 10-bit accuracy, 400ksps throughput, ultra-low full-power-down current (2µA), and integrated reference in a compact 16-pin TSSOP - making it optimal for space- and energy-constrained portable instrumentation where 10-bit fidelity is mandatory.

Availability

MAX1082BCUE+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX1082BCUE+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, medical, and communications applications.

The MAX1082/MAX1083 family was designed for low-power, multi-channel data acquisition in space-constrained, battery-operated systems - emphasizing integration, configurability, and supply flexibility without sacrificing 10-bit DC accuracy.

FAQ

What is the operating temperature range for MAX1082BCUE+T?

The MAX1082BCUE+T is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its intended use in portable instrumentation and non-automotive industrial applications. The device maintains ±1 LSB INL and ±1.0 LSB DNL across this full range, with gain-error temperature coefficient of ±1.6ppm/°C ensuring stable calibration in varying thermal environments. All electrical characteristics in the datasheet are guaranteed within this interval.

Does MAX1082BCUE+T support external reference input?

Yes, MAX1082BCUE+T supports external reference input. When the internal reference buffer is disabled by pulling REFADJ to VDD1, the REF pin accepts an external reference voltage from 1V to VDD. This configuration bypasses the internal 2.500V source and allows system-level reference sharing or higher-precision external references. The REF input current is specified at 200–350µA, and load regulation is 0.05–2.0mV/mA - requiring careful decoupling (4.7µF recommended) for stability.

How does the SHDN pin function on MAX1082BCUE+T?

The SHDN pin on MAX1082BCUE+T is an active-low hardware shutdown control. Pulling SHDN low reduces supply current to 2µA (typical), placing the device in full power-down mode. Unlike software power modes, this state persists regardless of serial interface activity. Release of SHDN returns the device to normal operation after a typical 1µs wake-up time. This pin enables rapid, deterministic power gating - critical for intermittent-sampling applications like duty-cycled sensor nodes.

What are the key timing requirements for reliable SPI communication with MAX1082BCUE+T?

MAX1082BCUE+T requires strict adherence to SPI timing: SCLK period ≤156ns (≥6.4MHz max), CS pulse width high ≥100ns, and setup/hold times (e.g., tDS = 35ns, tDH = 0ns) must be met. The device uses CPOL = 0 and CPHA = 0 mode. Critical timing signals include SSTRB (strobe valid 80ns after SCLK rise) and DOUT (data valid 80ns after SCLK rise). Violating these windows risks corrupted conversion results or missed MSB alignment in DSP interfaces.

Can MAX1082BCUE+T operate in pseudo-differential mode, and how is it configured?

Yes, MAX1082BCUE+T supports pseudo-differential mode using CH0/CH1 and CH2/CH3 pairs. Configuration is done via the 8-bit control byte sent to DIN: bit 6 = 0 selects differential mode, and bits [5:4] choose the pair (00 = CH0/CH1, 01 = CH2/CH3). In this mode, only the positive input (IN+) is sampled; the negative input (IN−) must remain stable to ±0.5LSB during conversion. This architecture enables common-mode rejection while retaining single-ended simplicity in PCB layout.