Analog Devices Inc./Maxim Integrated MAX174CCPI

Overview

MAX174CCPI from Maxim Integrated is a monolithic 12-bit successive-approximation analog-to-digital converter (ADC) with integrated buried-zener voltage reference (10.00 V ±2 mV), on-chip clock, and BiCMOS process architecture. It delivers 8 μs max conversion time, 150 mW power dissipation at ±15 V supplies, and supports ±5 V or 0 to +10 V analog input ranges via pin strapping. It is used in high-speed data acquisition systems requiring stable, self-contained digitization without external timing or reference components.

For engineers reviewing the MAX174CCPI datasheet, MAX174CCPI pinout, MAX174CCPI application, or MAX174CCPI equivalent, this page provides verified electrical specifications, microprocessor interface timing (full-control and stand-alone modes), bipolar/unipolar input configuration guidance, and validated alternative part selection for industrial signal conditioning and embedded measurement designs.

Technical Context

The MAX174CCPI employs a 12-bit successive approximation register (SAR) architecture with internal 2.5 kΩ-output DAC and zero-crossing comparator. Its conversion cycle is fully self-timed by an on-chip oscillator, eliminating external clock dependency. The internal 10 V buried-zener reference provides 10 ppm/°C temperature coefficient and supports both unipolar (0 to +10 V) and bipolar (±5 V) operation via REFIN/BIPOFF pin strapping.

Digital interfacing is configurable for 8-, 12-, or 16-bit buses using CS, CE, R/C, A0, and 12/8 control inputs. Three-state outputs (D0–D11) support byte- or word-oriented reads, with STS indicating conversion completion. Stand-alone mode enables direct R/C pulse-triggered operation without bus arbitration logic.

Key Specifications

Pinout & Package

MAX174CCPI is supplied in a 28-pin plastic DIP (PDIP) package with 0.6-inch width, compliant with JEDEC MS-001. Pin assignments are electrically identical across MAX174/MX574A/MX674A families but calibrated per grade.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit ADC applications.

Compared with MX574AKI+, MAX174CCPI offers faster throughput (8 μs vs. 15 μs) but narrower temperature range; compared with AD7874KN, it trades lower power for greater integration-eliminating clock generation and simplifying analog input configuration at the cost of higher quiescent dissipation.

Availability

MAX174CCPI is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive feedback systems, and electro-mechanical control units requiring stable component supply and long-term obsolescence management.

Supply support for MAX174CCPI 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 high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.

The MAX174CCPI belongs to Maxim's industry-standard complete ADC family, designed to replace discrete ADC + reference + clock solutions in space-constrained, high-reliability embedded systems where rapid time-to-market and reduced validation effort are critical.

FAQ

What is the operating temperature range of the MAX174CCPI?

The MAX174CCPI is specified for operation from 0°C to +70°C (Commercial grade). This range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official Maxim datasheet (Rev 4, 6/18). It does not support extended or military temperature grades-those are assigned to other variants like MAX174E or MAX174M. For designs requiring −40°C operation, MX574AKI+ is a validated alternative.

Does the MAX174CCPI require an external clock source?

No, the MAX174CCPI does not require an external clock source. It integrates a precision on-chip oscillator that fully controls the 12-bit successive approximation conversion cycle. This is explicitly stated in the General Description and Functional Diagram sections of the datasheet. External clocking is neither supported nor necessary-removing a common source of timing jitter and layout complexity in sensitive measurement systems.

How is the analog input range selected on the MAX174CCPI?

The MAX174CCPI supports 0 to +10 V, 0 to +20 V, ±5 V, or ±10 V input ranges via pin strapping: connect REFIN to REFOUT and BIPOFF to REFOUT for ±5 V operation; tie BIPOFF to AGND and apply signal to 10VIN for 0 to +10 V. These configurations are detailed in Figures 12–15 and Table 3 of the datasheet. No register writes or software commands are involved-only passive resistor connections.

What is the purpose of the STS pin on the MAX174CCPI?

The STS (Status) pin on the MAX174CCPI is an open-drain, active-high output that goes high at conversion start and returns low upon completion. It provides hardware-level notification of conversion status-used for polling or generating interrupts in microprocessor systems. Timing parameters (e.g., tDSC = 100 ns min delay from CE) are guaranteed in the Timing Characteristics table, enabling deterministic synchronization without software delays.

Can the MAX174CCPI operate in stand-alone mode without a microprocessor bus?

Yes, the MAX174CCPI supports stand-alone mode: wire CS and A0 low, CE and 12/8 high, then use R/C as the sole control signal. A low-to-high R/C transition initiates conversion; STS indicates completion; data appears on D0–D11 after access time. This mode is fully documented in the "Stand-Alone Operation" section (page 10) and eliminates need for address decoding logic-ideal for FPGA or simple GPIO-driven systems.