Analog Devices Inc./Maxim Integrated MAX1166BCUP+

Overview

MAX1166BCUP+ from Maxim Integrated is a 16-bit, byte-wide parallel-output successive-approximation ADC with internal 4.096V reference, ±2.5 LSB INL, 165ksps sample rate, and AutoShutdown™ reducing current to 0.1µA at 10ksps. It operates from single +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies, targeting high-accuracy, low-power data acquisition in space-constrained industrial systems.

For engineers reviewing the MAX1166BCUP+ datasheet, MAX1166BCUP+ pinout, MAX1166BCUP+ application, or MAX1166BCUP+ equivalent, this page delivers verified electrical specs, TSSOP-20 package mapping, real-world timing behavior (tCONV = 4.7µs, tDO = 40–80ns), and validated alternatives for battery-powered sensor interfaces and precision I/O boards.

Technical Context

The MAX1166BCUP+ implements a SAR architecture with integrated track-and-hold, factory-trimmed 4.096V internal reference (±25ppm/°C), and dual-reference support (internal or external 3.8V–5.25V). Its byte-wide D0–D7/D8–D15 output uses HBEN to toggle between high/low bytes, enabling direct interfacing with 8-bit microcontrollers without glue logic.

Power management is controlled via R/C pin sequencing across three CS falling edges: first enables acquisition, second selects standby (reference on) or shutdown (reference off), third loads data. Internal clock eliminates external timing components, and EOC provides asynchronous conversion-complete signaling.

Key Specifications

Pinout & Package

MAX1166BCUP+ is housed in a 20-pin thin shrink small-outline package (TSSOP) with exposed pad for thermal enhancement. Pin pitch is 0.65mm; body dimensions are 4.4mm × 6.5mm × 1.1mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit parallel ADC applications.

Compared with MAX1166BCUP+, ADS8860IDRCT offers higher speed and lower voltage operation but removes the hardware simplicity of byte-wide parallel access, while AD7682BRMZ trades interface flexibility for superior noise immunity and compactness - neither replicates the MAX1166BCUP+'s combination of internal reference, AutoShutdown™, and HBEN-controlled 8-bit bus.

Availability

MAX1166BCUP+ is available at Aetrix Electronics and suitable for industrial process control, portable data-acquisition systems, and precision sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MAX1166BCUP+ 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, medical, and communications markets - emphasizing low power, high accuracy, and integration.

The MAX1165/MAX1166 family targets battery-powered and space-constrained data-acquisition systems needing 16-bit resolution with minimal external components and deterministic timing - delivering SAR performance without FPGA or high-speed serial overhead.

FAQ

What is the operating temperature range for MAX1166BCUP+?

The MAX1166BCUP+ is specified for the extended industrial temperature range of -40°C to +85°C. This rating applies to all electrical specifications including ±2.5 LSB INL, 165ksps sample rate, and 4.096V internal reference stability. The device uses the 'E' suffix in its ordering code (MAX1166BEUP+ would be the -40°C to +85°C version), but MAX1166BCUP+ itself is the commercial-grade variant rated for 0°C to +70°C per Maxim's official datasheet ordering table - confirming its suitability for office, lab, and non-extreme ambient environments.

Does MAX1166BCUP+ require an external reference?

No, MAX1166BCUP+ does not require an external reference. It integrates a factory-trimmed 4.096V internal reference with ±25ppm/°C temperature coefficient and 4.054V to 4.136V output tolerance. External reference is optional and supported via the REF pin (3.8V to 5.25V range) or REFADJ pin (5kΩ input impedance), but the internal reference enables fully self-contained operation with only two bypass capacitors (0.1µF at REFADJ, 4.7µF at REF).

How does the HBEN pin function on MAX1166BCUP+?

The HBEN (High-Byte Enable) pin on MAX1166BCUP+ controls byte multiplexing on the 8-bit data bus: when HBEN = 1, the most significant byte (D8–D15) appears on D0–D7; when HBEN = 0, the least significant byte (D0–D7) appears on D0–D7. This allows 16-bit results to be read using an 8-bit microcontroller port without external latches or address decoding - a key differentiator from the 16-bit-wide MAX1165 series.

What is the minimum acquisition time for MAX1166BCUP+?

The minimum acquisition time (tACQ) for MAX1166BCUP+ is 1.1µs, defined as the maximum time required for the internal sampling capacitor to settle after the second falling edge of CS. This value assumes a source impedance ≤1kΩ; for higher impedances, tACQ increases per the formula tACQ = 11 × (RS + 800Ω) × 35pF. The 1.1µs spec enables reliable 165ksps operation with minimal dead time between conversions.

Can MAX1166BCUP+ operate from a 3.3V digital supply?

Yes, MAX1166BCUP+ supports digital supply voltages from +2.7V to +5.25V, making it fully compatible with 3.3V logic systems. DVDD = 3.3V meets all timing and drive specifications: VOH ≥ DVDD – 0.4V (≥2.9V), VOL ≤ 0.4V, and tDO ≤ 80ns under 20pF load. However, AVDD must remain within +4.75V to +5.25V to maintain reference accuracy and analog performance - requiring separate 5V analog rail or LDO regulation.