Analog Devices Inc./Maxim Integrated MAX1075ETC

Overview

The MAX1075ETC from Maxim Integrated is a 10-bit, true-differential, serial-output analog-to-digital converter (ADC) with 1.8Msps sampling rate, bipolar input range (±VREF/2), and ±0.5 LSB INL accuracy. It operates from a single +4.75V to +5.25V analog supply and supports 1.8V–VDD digital logic via separate VL pin. Designed for high-noise industrial motor control and base-station data acquisition systems requiring low power and high AC performance.

For engineers reviewing the MAX1075ETC datasheet, MAX1075ETC pinout, MAX1075ETC application, or MAX1075ETC equivalent, this page delivers verified technical context, real-world timing behavior, confirmed bipolar transfer function (two's complement output), and validated SPI/QSPI/MICROWIRE interface compatibility - all specific to the MAX1075ETC variant in 12-pin TQFN.

Technical Context

The MAX1075ETC uses a successive-approximation register (SAR) architecture with an internal true-differential track-and-hold (T/H), enabling accurate digitization of differential signals up to 20MHz small-signal bandwidth. Its conversion is initiated by CNVST falling edge and clocked by SCLK, requiring exactly 16 clock cycles per 10-bit result plus 2 sub-bits and 3 leading zeros.

It features two low-power states: partial power-down (1mA IDD) and full power-down (1µA max IDD), both entered via precise CNVST/SCLK sequencing. The device requires an external reference (1.0V to VDD), supports unidirectional 3-wire serial communication, and exhibits no pipeline delay - delivering deterministic latency critical for closed-loop control.

Key Specifications

Pinout & Package

The MAX1075ETC is housed in a 12-pin 3mm × 3mm TQFN package with exposed paddle (EP) internally connected to GND. Pin 1 is AIN−, pin 12 is AIN+, and pin 6 (GND) and EP provide low-inductance analog ground return.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8326IPW and AD7457BRMZ, the MAX1075ETC uniquely combines 1.8Msps throughput, true-differential input architecture, 1.8V–5.25V flexible digital I/O, and sub-µA shutdown - making it optimal for battery-constrained, noise-prone, real-time control systems demanding deterministic latency and bipolar signal fidelity.

Availability

MAX1075ETC is available at Aetrix Electronics and suitable for industrial motor control, base-station IF sampling, and portable test equipment requiring stable component supply, extended temperature operation (−40°C to +85°C), and RoHS-compliant packaging.

Supply support for MAX1075ETC 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, communications, and computing applications.

The MAX1075ETC belongs to Maxim's high-speed, low-power SAR ADC product line, engineered specifically for noise-immune, real-time data acquisition in space- and power-constrained systems where differential signaling and deterministic latency are mandatory.

FAQ

What is the exact input voltage range for the MAX1075ETC?

The MAX1075ETC has a true-differential bipolar input range of −VREF/2 to +VREF/2. With a standard 4.096V reference, this yields ±2.048V across AIN+ and AIN−. Absolute input voltage on each pin must stay within 0V to VDD (4.75V–5.25V). The MAX1075ETC does not support unipolar input - that function is exclusive to the MAX1072ETC variant.

Does the MAX1075ETC require an external reference, and what are the bypassing requirements?

Yes, the MAX1075ETC requires an external reference applied to the REF pin, with a valid range of +1.0V to VDD. For optimal performance, REF must be bypassed to RGND using both a 0.01µF ceramic capacitor (for high-frequency noise) and a 4.7µF tantalum or ceramic capacitor (for low-frequency stability). The MAX1075ETC does not include an internal reference, and omitting either capacitor degrades INL and SINAD.

How does the MAX1075ETC enter and exit full power-down mode?

The MAX1075ETC enters full power-down mode by first entering partial power-down (CNVST high after the 3rd but before the 14th SCLK rising edge), then repeating the same sequence. Exit requires pulling CNVST low and waiting ≥14 SCLK cycles before pulling CNVST high. Full power-down draws ≤1µA, and recovery time is 2ms. This two-step sequence is mandatory - direct entry is not supported.

What is the data format and timing structure of the MAX1075ETC serial output?

The MAX1075ETC outputs 16-bit frames on DOUT: three leading zeros, ten 10-bit two's complement data bits (MSB first), two sub-bits (S1, S0), and one trailing zero. Data shifts out on SCLK rising edges starting at the 4th edge. The MAX1075ETC guarantees tDOUT (24ns) and tDHOLD (4ns) timing margins, enabling reliable capture by standard SPI peripherals without additional synchronization logic.

Can the MAX1075ETC interface directly with a 1.8V microcontroller without level shifters?

Yes - the MAX1075ETC supports direct 1.8V logic interfacing via its dedicated VL pin, which accepts +1.8V to VDD. When VL = 1.8V, the DOUT high-level output is VL − 0.5V (≥1.3V), and input thresholds are 0.3×VL and 0.7×VL - fully compatible with 1.8V CMOS logic families. No external level translation is needed, reducing BOM count and board area.