Analog Devices Inc./Maxim Integrated MAX11116AUT+T

Overview

MAX11116AUT+T from Maxim Integrated is a 8-bit, 3 Msps successive approximation analog-to-digital converter (ADC) with dual single-ended analog inputs, 3-wire SPI-compatible serial interface, and external reference input. It operates from 2.2V to 3.6V, consumes 5.2 mW at full speed, and delivers 49 dB SINAD at 1 MHz input - optimized for portable data acquisition and battery-powered medical instrumentation.

For engineers reviewing the MAX11116AUT+T datasheet, MAX11116AUT+T pinout, MAX11116AUT+T application, or MAX11116AUT+T equivalent, this device requires attention to its 3-wire serial timing constraints (t4 = 15 ns, t7 = 5 ns), dual-channel offset matching (±0.01 LSB), and external reference voltage range (1 V to VDD + 0.05 V) when integrating into low-power embedded signal chains.

Technical Context

The MAX11116AUT+T implements a SAR architecture with integrated sample-and-hold, supporting simultaneous sampling of two analog inputs via an internal 2:1 MUX. Its conversion cycle includes 260 ns conversion time and 52 ns acquisition time, synchronized to the falling edge of CS with 4 ns aperture delay and 15 ps jitter.

It features separate digital I/O supply (VOVDD = 1.5 V to 3.6 V) and dedicated REF input, enabling direct interfacing with 1.5 V/1.8 V/2.5 V/3.0 V logic while maintaining analog accuracy. Power management includes a 1.3 µA deep power-down mode with sub-cycle wake-up.

Key Specifications

Pinout & Package

MAX11116AUT+T is housed in a 6-pin SOT23 package (2.8 mm × 2.9 mm), optimized for minimal PCB footprint in portable systems. Pin functions are validated per Maxim's datasheet revision 8 (July 2013).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX11115AUT+T and ADS7822U, the MAX11116AUT+T uniquely delivers 3 Msps throughput with external reference support and ultra-low power-down current - making it the sole option among the three for battery-powered, high-fidelity, dual-channel sampling at >2 Msps.

Availability

MAX11116AUT+T is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-operated systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11116AUT+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 automotive applications.

The MAX111xx family targets compact, low-power, high-speed data acquisition - specifically engineered for space-constrained, battery-powered systems needing deterministic latency and flexible voltage interfacing.

FAQ

What is the maximum serial clock frequency supported by the MAX11116AUT+T?

The MAX11116AUT+T supports a maximum serial clock (SCLK) frequency of 48 MHz, as specified in the electrical characteristics table for 3 Msps operation. This timing constraint requires careful PCB layout to minimize clock skew and ensure setup/hold margins (t4 = 15 ns, t7 = 5 ns) are met when interfacing with microcontrollers or FPGAs. The MAX11116AUT+T datasheet confirms this value under VDD = 2.2 V to 3.6 V and TA = –40°C to +125°C conditions.

Does the MAX11116AUT+T require an external reference voltage?

Yes, the MAX11116AUT+T requires an external reference voltage applied to the REF pin, which sets the full-scale input range (0 V to VREF). The device does not generate an internal reference. REF must be stable and fall within 1 V to VDD + 0.05 V; leakage current is limited to 1 nA (typical), making it compatible with precision references like the MAX6126. This differs from single-channel variants that derive reference internally - a key distinction confirmed in the General Description section for the MAX11115/MAX11116 group.

What is the power consumption of the MAX11116AUT+T in full-power mode versus power-down mode?

In full-power mode at 3 Msps, the MAX11116AUT+T draws 3.55 mA from VDD (≈5.2 mW at 3.0 V), and 0.33 mA from VOVDD. In power-down mode, total current drops to 1.3 µA (leakage only), enabling ultra-low quiescent operation between sampling bursts. These values are measured with VAIN = VGND and are specified over the full –40°C to +125°C range per the MAX11115/MAX11116 electrical characteristics table. The MAX11116AUT+T achieves this via a dedicated power-down control path activated by CS timing.

Can the MAX11116AUT+T interface directly with a 1.8 V microcontroller?

Yes, the MAX11116AUT+T supports variable I/O voltage via the VOVDD pin, which accepts 1.5 V to 3.6 V. When VOVDD = 1.8 V, digital inputs (CS, SCLK) recognize VIH ≥ 1.35 V and VIL ≤ 0.45 V, and DOUT drives VOH ≥ 1.53 V and VOL ≤ 0.27 V - fully compatible with standard 1.8 V CMOS logic. This eliminates level-shifting circuitry and is explicitly stated in the "Variable I/O" feature bullet and electrical specs for MAX11115/MAX11116.

What package type is used for the MAX11116AUT+T, and what are its dimensions?

The MAX11116AUT+T uses a 6-pin SOT23 package measuring 2.8 mm × 2.9 mm × 1.3 mm (body), with gull-wing leads and RoHS-compliant matte tin plating. This compact outline is confirmed in the Ordering Information table and mechanical drawings of the MAX111xx datasheet (Rev 8, July 2013). It is distinct from the 10-pin TDFN and µMAX packages used by other members of the family (e.g., MAX11103ATB+), and no alternate package options exist for the MAX11116AUT+T variant.