Analog Devices Inc./Maxim Integrated MAX1077ETC+T

Overview

MAX1077ETC+T from Maxim Integrated is a 10-bit, true-differential, serial-output analog-to-digital converter (ADC) with internal 2.048V reference, operating at up to 1.5Msps on a single +2.7V to +3.6V supply. It features unipolar input range (0 to V_REF), ±0.5 LSB INL, and 61dB SINAD at 525kHz - optimized for high-accuracy industrial data acquisition and motor control systems.

For engineers reviewing the MAX1077ETC+T datasheet, MAX1077ETC+T pinout, MAX1077ETC+T application, or MAX1077ETC+T equivalent, this page delivers verified technical context, real-world timing behavior, differential input interface constraints, and validated alternative options - all grounded in the official MAX1077/MAX1079 datasheet (Rev 1, 3/11).

Technical Context

The MAX1077ETC+T employs a successive-approximation register (SAR) architecture with an integrated true-differential track-and-hold (T/H), enabling precise sampling of differential analog signals without external amplification. Its T/H acquires input in ≤125ns and holds on the falling edge of CNVST, with aperture jitter specified at 30ps.

It uses a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface: SCLK clocks conversion and data output, CNVST initiates sampling, and DOUT outputs 10-bit MSB-first data plus 2 sub-bits and 3 leading zeros over 16 clock cycles - no pipeline delay, no latency beyond one conversion cycle.

Key Specifications

Pinout & Package

MAX1077ETC+T is housed in a 12-pin 3mm × 3mm TQFN-EP package with exposed paddle (EP) internally connected to GND. The package supports reflow soldering (260°C) and is RoHS-compliant (+ suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1077ETC+T, ADS8325IDRCT trades speed for resolution and adds system-level BOM cost, while AD7476ARTZ-REEL7 reduces size but increases design complexity due to missing integrated reference and differential capability - MAX1077ETC+T uniquely balances speed, integration, and noise immunity in a 12-pin TQFN.

Availability

MAX1077ETC+T is available at Aetrix Electronics and suitable for industrial process control, motor control, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX1077ETC+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 MAX1077ETC+T belongs to Maxim's precision data acquisition ADC family, designed specifically for low-power, high-speed, true-differential sampling in noise-sensitive environments - emphasizing integration, accuracy, and ease of digital interface.

FAQ

What is the maximum guaranteed sampling rate for MAX1077ETC+T at 1.8V digital supply (VL)?

The MAX1077ETC+T guarantees 1.5Msps operation only when VL > 2.7V. At VL = 1.8V, the maximum recommended f_SCLK drops to ~17MHz (per Figure 1), limiting throughput to approximately 1.06Msps. For full 1.5Msps performance, VL must be ≥2.7V - confirmed in the Timing Characteristics table (Note 7) and Typical Operating Characteristics (Figure toc01).

Does MAX1077ETC+T support bipolar input signals?

No. The MAX1077ETC+T is explicitly specified for unipolar differential input (0 V to V_REF), as stated in the Ordering Information table and General Description. The bipolar variant is the MAX1079ETC+T. Using MAX1077ETC+T with bipolar signals will clip negative excursions below 0V and violate absolute maximum ratings for AIN−.

How does the MAX1077ETC+T handle power-up initialization?

The MAX1077ETC+T requires one complete conversion cycle after hardware power-up to initialize internal calibration - no external command needed. This initialization is mandatory only after full power cycling; exiting partial or full power-down modes does not require re-initialization. The device is ready for normal operation immediately after that first conversion completes.

Can MAX1077ETC+T's REF pin drive external circuitry?

Yes. The MAX1077ETC+T's REF pin provides a buffered 2.048V output capable of sourcing up to 2mA (per Electrical Characteristics table). It is intended for use as a precision reference for external components - but must be bypassed with 0.01µF + 4.7µF capacitors to RGND, and its voltage drift (±50ppm/°C) must be considered in system-level accuracy budgets.

What happens to the internal reference during full power-down mode?

In full power-down mode, the MAX1077ETC+T disables its internal 2.048V reference to minimize current draw (≤1µA). After exiting full power-down, a minimum 2ms recovery time is required for the reference to settle within specification - documented in the Timing Characteristics table (t_PWR-UP = 2ms) and Applications Information section.