Analog Devices Inc./Maxim Integrated MAX1106EUB+T

Overview

MAX1106EUB+T from Maxim Integrated is a low-power, single-channel, 8-bit successive-approximation ADC with integrated track/hold, internal +2.048V reference, SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, and pin-selectable power-down mode. It operates from +2.7V to +3.6V, draws only 96µA at 25ksps, and supports unipolar single-ended or pseudo-differential analog inputs with 0–VDD range - ideal for portable data loggers and solar-powered remote sensors.

For engineers reviewing the MAX1106EUB+T datasheet, MAX1106EUB+T pinout, MAX1106EUB+T application, or MAX1106EUB+T equivalent, key selection criteria include its guaranteed no-missing-codes performance over –40°C to +85°C, 35µs max conversion time, ±0.15 LSB INL (typ), 49dB SINAD at 10kHz, and µMAX-10 package compatibility with space-constrained embedded systems.

Technical Context

The MAX1106EUB+T uses a charge-redistribution SAR architecture with auto-zeroed comparator and internal 400kHz oscillator, eliminating need for external clocking. Its track/hold acquires input in ≤1µs (min) and holds during conversion, with acquisition time dependent on source impedance per t_ACQ = 6(R_S + 6.5kΩ)·18pF.

All configuration modes - internal vs. external reference, unipolar single-ended vs. pseudo-differential input, and active vs. shutdown - are controlled solely by pin states (REFIN, SHDN, CONVST), requiring no register writes or firmware overhead. The DOUT output is three-state, synchronized to SCLK falling edge, and automatically tri-states after eighth bit.

Key Specifications

Pinout & Package

MAX1106EUB+T is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), footprint 20% of an 8-pin plastic DIP. Pinout validated per Maxim's official datasheet Rev 0 (19-1432).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV1543IDR, MAX1106EUB+T offers the lowest active and shutdown current in a miniature µMAX package, with pin-configurable reference and input modes - making it optimal for compact, long-life, single-channel measurement systems where 8-bit resolution suffices.

Availability

MAX1106EUB+T is available at Aetrix Electronics and suitable for portable data logging, hand-held instrumentation, and solar-powered remote sensing requiring stable component supply across industrial temperature ranges.

Supply support for MAX1106EUB+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 demanding industrial, medical, and communications applications.

The MAX1106EUB+T belongs to Maxim's low-power serial ADC product line, engineered specifically for battery-operated and space-constrained measurement systems requiring integrated reference, track/hold, and minimal external components.

FAQ

What is the operating temperature range for MAX1106EUB+T?

The MAX1106EUB+T is rated for –40°C to +85°C, matching the "E" grade designation in its ordering code. This extended industrial temperature range ensures reliable operation in outdoor sensor nodes, automotive cabin modules, and industrial control cabinets without derating. All key specifications - including INL, DNL, and reference stability - are guaranteed across this full range, as confirmed in the Electrical Characteristics tables of the official datasheet.

Does MAX1106EUB+T require an external reference voltage?

No, MAX1106EUB+T does not require an external reference voltage. It integrates a precise +2.048V bandgap reference accessible at REFOUT, which can be connected directly to REFIN to enable internal reference operation. A 1µF capacitor at REFOUT is mandatory for stability and <0.5LSB settling. External references from 1V to VDD are supported only when REFIN is disconnected from REFOUT - providing design flexibility without added cost.

How is the analog input configured for single-ended versus pseudo-differential mode on MAX1106EUB+T?

MAX1106EUB+T analog input mode is pin-configured: for single-ended unipolar operation, tie IN− to GND; for pseudo-differential mode, apply a stable reference (e.g., mid-supply or sensor common) to IN−. The device samples only IN+, while IN− serves as the comparison baseline - requiring IN− to remain within ±0.5LSB of its nominal value during conversion. No software or register setting is involved; configuration is purely hardware-defined.

What is the minimum acquisition time required before starting a conversion with MAX1106EUB+T?

The minimum acquisition time (t_ACQ) for MAX1106EUB+T is 1µs, as specified in the datasheet. This time begins immediately after the previous conversion completes and ends at the falling edge of CONVST. For source impedances up to 1kΩ, 1µs is sufficient; for higher impedances, t_ACQ increases per t_ACQ = 6(R_S + 6.5kΩ)·18pF. In practice, holding CONVST low for ≥1µs after data readout ensures adequate acquisition before the next toggle.

Can MAX1106EUB+T interface directly with a 3.3V microcontroller SPI port?

Yes, MAX1106EUB+T interfaces directly with a 3.3V microcontroller SPI port. Its digital inputs (SCLK, CONVST, SHDN) accept logic-high thresholds down to 0.7×VDD (≥2.1V at VDD=3.0V), and its DOUT output drives VOH ≥ VDD–0.5V (≥2.5V) and VOL ≤ 0.4V - fully compatible with standard 3.3V CMOS levels. No level shifters or pull-ups are needed, and the SPI timing (up to 2MHz SCLK, 200ns setup/hold) meets typical MCU peripheral requirements.