Analog Devices Inc./Maxim Integrated MAX1061BCEI

Overview

MAX1061BCEI from Maxim Integrated is a 10-bit successive-approximation ADC with 8-channel single-ended / 4-channel pseudo-differential input multiplexing, +2.5V internal reference, byte-wide parallel (8+2) interface, and 250ksps sampling rate. It operates from a single +3V analog supply and supports digital logic levels from +1.8V to +3.6V via dedicated VLOGIC pin - ideal for portable data-acquisition systems requiring low power and compact footprint.

For engineers reviewing the MAX1061BCEI datasheet, MAX1061BCEI pinout, MAX1061BCEI application, or MAX1061BCEI equivalent, this page delivers verified specifications, validated pin functions, confirmed operating modes (unipolar/bipolar, single-ended/pseudo-differential), real-world timing behavior (2µs wake-up, 3.6µs conversion), and cross-referenced alternatives - all aligned to the 0°C to +70°C industrial temperature grade and 28-pin QSOP package.

Technical Context

The MAX1061BCEI implements a charge-redistribution SAR architecture with integrated track/hold, supporting both internal and external clock modes (up to 4.8MHz) and internal/external acquisition control. Its analog front-end features software-configurable input topology (SGL/DIF, UNI/BIP), COM-referenced single-ended operation, and pseudo-differential channel pairing (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7).

Digital control is executed via an 8-bit write-only control byte (D7–D0) that configures channel address (A2–A0), acquisition mode (ACQMOD), clock source (D6/D7), power-down state (PD1/PD0), and signal polarity (UNI/BIP). Output data is read in two phases using HBEN to select either D0–D7 (LSBs) or D0/D8 and D1/D9 (MSBs), synchronized by RD and INT signals.

Key Specifications

Pinout & Package

MAX1061BCEI is housed in a 28-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), RoHS-compliant and lead-free. Pin functions are validated per Maxim's official datasheet Rev 1 (19-2724).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit parallel-output ADC applications.

Compared with MAX1061ACEI+, the MAX1061BCEI trades 0.5 LSB linearity for broader commercial temperature range qualification and lower unit cost, while maintaining identical power profile, timing, and software interface. Against ADS7822U, it provides 2-bit higher resolution, parallel throughput, and integrated reference - at the expense of package size and interface complexity.

Availability

MAX1061BCEI is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, energy metering front-ends, and touch-screen controller interfaces requiring stable component supply across extended production lifecycles.

Supply support for MAX1061BCEI 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 MAX1061BCEI belongs to Maxim's low-power, parallel-interface ADC product line - engineered specifically for space- and power-constrained data-acquisition systems needing fast wake-up, flexible input configuration, and integrated reference stability.

FAQ

What is the operating temperature range for the MAX1061BCEI?

The MAX1061BCEI is rated for 0°C to +70°C ambient operation, as confirmed by its ordering suffix "BCEI" and the Absolute Maximum Ratings table in the official datasheet. This commercial-grade temperature range supports deployment in office equipment, consumer test gear, and non-extreme industrial environments. The MAX1061BCEI does not meet extended –40°C to +85°C requirements - those are fulfilled by the MAX1061E variants (e.g., MAX1061BEEI+).

Does the MAX1061BCEI require an external clock to operate?

No, the MAX1061BCEI supports both internal and external clock modes. When configured for internal clock mode (D7=1, D6=0 in control byte), it generates its own 3MHz conversion clock - eliminating need for external timing components. In external mode (D7=D6=1), it accepts 100kHz–4.8MHz TTL/CMOS clocks. The CLK pin must be tied high or low in internal mode to prevent floating.

How many analog input channels does the MAX1061BCEI support in single-ended mode?

The MAX1061BCEI supports eight single-ended analog input channels (CH0 through CH7), as explicitly stated in the General Description and Pin Configurations section of the datasheet. This distinguishes it from the pin-compatible MAX1063 (4-channel version). Channel selection is controlled by the A2–A0 bits in the 8-bit control byte written to D7–D0.

Can the MAX1061BCEI interface directly with a 1.8V microcontroller?

Yes, the MAX1061BCEI can interface directly with 1.8V microcontrollers using its dedicated VLOGIC pin, which accepts +1.8V to +3.6V digital supply voltage. All digital I/O pins (D0–D9, WR, RD, CS, INT, HBEN) are referenced to VLOGIC, ensuring valid logic thresholds and drive strength without external level shifters - a key design advantage for mixed-voltage systems.

What is the function of the HBEN pin on the MAX1061BCEI?

The HBEN (High-Byte Enable) pin on the MAX1061BCEI controls multiplexing of the 10-bit conversion result onto the 8-bit data bus: when HBEN = 1, D0/D8 and D1/D9 output the two most significant bits; when HBEN = 0, D0–D7 output the eight least significant bits. This enables full 10-bit readout using standard 8-bit parallel interfaces without additional latches or bus widening.