Analog Devices Inc./Maxim Integrated MAX1192ETI

Overview

MAX1192ETI from Maxim Integrated is an ultra-low-power, dual 8-bit analog-to-digital converter (ADC) with 22Msps sampling rate and fully differential 440MHz input bandwidth. It delivers 48.6dB SINAD at 5.5MHz input frequency while consuming only 27.3mW, operates from 2.7V–3.6V analog supply and 1.8V–3.6V digital supply, and features internal/external reference selection. It is used in battery-powered ultrasound imaging and IQ baseband sampling systems.

For engineers reviewing the MAX1192ETI datasheet, MAX1192ETI pinout, MAX1192ETI application, or MAX1192ETI equivalent, key selection considerations include its dual-channel interleaved timing, 5-cycle channel A / 5.5-cycle channel B latency, tri-state multiplexed CMOS outputs, ±0.512V full-scale range, and three power-down modes enabling sub-µA shutdown current.

Technical Context

The MAX1192ETI employs a seven-stage fully differential pipelined architecture with digital error correction to ensure no missing codes and ±1.0 LSB INL over temperature. Each pipeline stage uses flash ADCs followed by DAC-based residue generation and ×2 gain, enabling high-speed conversion with low power.

Its dual track-and-hold circuits support both fully differential and single-ended analog inputs with matched impedance requirements and VDD/2 common-mode biasing. The internal reference generates ±0.512V differential range (VREFP–VREFN), configurable via REFIN voltage (VDD = internal, 1.024V = buffered external, GND = unbuffered external).

Key Specifications

Pinout & Package

The MAX1192ETI is housed in a 5mm × 5mm, 28-pin thin QFN package with exposed paddle (EP), rated for -40°C to +85°C operation. Pin 3 and EP are internally connected and must be externally tied to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 8-bit ADC applications.

Compared with MAX1192ETI, MAX1193ETI trades higher power for doubled sampling throughput and extended bandwidth, while MAX1191ETI reduces power by 61% at the expense of halving maximum input signal frequency support-enabling optimized trade-offs across speed, accuracy, and energy efficiency.

Availability

MAX1192ETI is available at Aetrix Electronics and suitable for ultrasound imaging front-ends, IQ baseband sampling receivers, and battery-powered portable instrumentation requiring stable component supply and guaranteed industrial temperature operation.

Supply support for MAX1192ETI 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 demanding industrial, medical, and communications applications.

The MAX1192ETI belongs to Maxim's ultra-low-power, high-speed ADC product line, engineered specifically for portable and power-sensitive systems requiring dual-channel synchronization, wide analog bandwidth, and minimal thermal footprint.

FAQ

What is the absolute maximum analog supply voltage for the MAX1192ETI?

The MAX1192ETI specifies an absolute maximum analog supply voltage (VDD) of +3.6V. Exceeding this rating-even momentarily-may cause permanent damage. The recommended operating range is 2.7V to 3.6V. Operation at 3.0V is typical for characterization, and the internal reference voltage (VREFP–VREFN) remains stable within ±3% across this range, as confirmed in the Electrical Characteristics table on page 3 of the MAX1192 datasheet.

Does the MAX1192ETI support single-ended analog inputs?

Yes, the MAX1192ETI supports single-ended analog inputs on both channels. For Channel A, connect the signal source to INA+ and tie INA− to COM; for Channel B, connect to INB+ and tie INB− to COM. The device maintains 440MHz bandwidth and 48.6dB SINAD in single-ended mode, though common-mode rejection and distortion performance are optimized for fully differential drive with matched impedances on both inputs.

How does the power-down mode configuration work on the MAX1192ETI?

The MAX1192ETI uses two digital inputs-PD0 and PD1-to select among four power states: Normal (PD0=1, PD1=1), Idle (PD0=1, PD1=0), Standby (PD0=0, PD1=1), and Shutdown (PD0=0, PD1=0). In Shutdown mode, analog supply current drops to 0.6µA and digital supply current to 0.1µA. Wake-up time from Shutdown is 20µs, enabling rapid resumption of sampling without reinitialization overhead.

What is the latency difference between Channel A and Channel B in the MAX1192ETI?

The MAX1192ETI exhibits a fixed latency difference: Channel A data is valid 5 clock cycles after CLK rising edge, while Channel B data is valid 5.5 clock cycles after CLK rising edge. This asymmetry is inherent to the dual-pipeline architecture and is documented in the Timing Characteristics table (page 6). Designers must account for this 0.5-cycle offset in FPGA or ASIC logic that aligns or processes both channels synchronously.

Can the MAX1192ETI use an external reference, and what are the configuration requirements?

Yes, the MAX1192ETI supports buffered and unbuffered external reference modes. For buffered mode, apply 1.024V ±10% to REFIN; for unbuffered mode, tie REFIN to GND and drive REFP, REFN, and COM externally at precise voltages (±0.256V around VDD/2). All reference pins require 0.33µF bypass capacitors. Internal reference mode is selected by leaving REFIN open or connecting it to VDD.