Analog Devices Inc./Maxim Integrated MAX1165BCUI

Overview

The MAX1165BCUI from Maxim Integrated is a 16-bit, low-power, successive-approximation ADC with parallel interface, internal 4.096V reference, ±2.5 LSB INL, and 165ksps sample rate. It operates from single +4.75V to +5.25V analog and +2.7V to +5.25V digital supplies, consuming 2.7mA with internal reference. Designed for high-accuracy, space-constrained data-acquisition systems including industrial I/O boards and sensor monitoring.

For engineers reviewing the MAX1165BCUI datasheet, MAX1165BCUI pinout, MAX1165BCUI application, or MAX1165BCUI equivalent, this page delivers verified technical context, real-world timing behavior, supply current vs. sample rate trade-offs, and validated alternatives for battery-powered or thermally sensitive embedded measurement designs.

Technical Context

The MAX1165BCUI implements a SAR architecture with integrated track-and-hold, factory-trimmed 4.096V internal reference (±25ppm/°C), and automatic power-down controlled via R/C pin sequencing. Conversion is initiated by CS falling edges, with acquisition time fixed at 1.1µs minimum and total conversion time ≤4.7µs.

It supports both internal and external reference modes: internal mode uses REFADJ and REF pins with 4.7µF/0.1µF bypassing; external mode disables the internal buffer by tying REFADJ to AVDD and accepts 3.8V–5.25V reference input at REF. Digital outputs D0–D15 are three-state, driven only after third CS edge with R/C high.

Key Specifications

Pinout & Package

MAX1165BCUI is housed in a 28-pin TSSOP package (4.4mm × 9.7mm, 0.65mm pitch), optimized for compact PCB layouts in space-constrained instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7606BSTZ, the MAX1165BCUI uniquely balances 16-bit precision, 5V-compatible parallel interface, ultra-low shutdown current, and compact 28-pin TSSOP-making it optimal for cost-sensitive, space-constrained, single-channel industrial measurement where bus simplicity and battery longevity are critical.

Availability

MAX1165BCUI is available at Aetrix Electronics and suitable for industrial process control, temperature monitoring, and I/O board designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX1165BCUI 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) is a semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.

The MAX1165BCUI belongs to Maxim's low-power precision ADC product line, engineered for high-resolution data acquisition in thermally constrained, battery-operated, or space-limited embedded systems demanding minimal external components.

FAQ

What is the guaranteed INL specification for MAX1165BCUI over its full operating temperature range?

The MAX1165BCUI guarantees ±2.5 LSB integral nonlinearity across its specified 0°C to +70°C commercial temperature range. This value is confirmed in the Electrical Characteristics table under "Relative Accuracy (INL)" for the MAX116_B grade, and applies to all operating conditions including full-scale input and maximum sample rate. The MAX1165BCUI achieves this performance using end-point calibration and does not require user trimming.

How does the R/C pin control power-down behavior in MAX1165BCUI?

In the MAX1165BCUI, the R/C pin determines post-conversion power state during the second falling edge of CS: low selects standby mode (internal reference remains active, enabling fast wake-up), while high selects shutdown mode (reference and buffer powered down, reducing current to 0.5µA). This behavior is deterministic and documented in the "Selecting Standby or Shutdown Mode" section of the datasheet. The MAX1165BCUI requires 10ms reference settling time after shutdown before accurate conversion.

Can MAX1165BCUI operate with an external reference, and what are the voltage limits?

Yes, the MAX1165BCUI supports external reference operation. To enable it, tie REFADJ to AVDD, then apply a stable reference voltage between +3.8V and +5.25V to the REF pin. The external reference must drive ≥100µA DC load with ≤10Ω output impedance. When using external reference, the MAX1165BCUI consumes 1.8mA at 165ksps-0.9mA less than with internal reference-making it ideal for power-optimized designs.

What is the function of the EOC signal in MAX1165BCUI, and how is it timed relative to CS?

The EOC (End of Conversion) signal in the MAX1165BCUI is an active-low, open-drain flag that falls at conversion completion, indicating valid data is ready on D0–D15. Its timing is defined relative to CS: EOC falls within tEOC (max 40ns) after the second falling edge of CS, and data becomes valid tDO (max 80ns) after the third falling edge of CS when R/C is high. This allows precise hardware handshaking without polling, essential for deterministic real-time acquisition.

Does MAX1165BCUI require a reset sequence after power-up, and if so, what is the recommended method?

The MAX1165BCUI does not require a dedicated reset pin assertion at power-up, but may enter an undefined state after wake-up from shutdown. Maxim recommends either performing one "dummy" conversion (full CS/R/C sequence) to establish known operation, or asserting the RESET pin (active-high, synchronous with CS high) to initialize internal logic. Both methods ensure reliable first-data validity. The MAX1165BCUI datasheet confirms RESET functionality is fully supported in the BCUI variant.