Analog Devices Inc./Maxim Integrated MAX165ACPN+

Overview

MAX165ACPN+ from Maxim Integrated is a 12-bit analog-to-digital converter (ADC) with parallel interface, ±1 LSB integral nonlinearity (INL), 10 µs conversion time, and ±5 V analog input range. It operates from a single +5 V supply and is used in precision data acquisition systems requiring high linearity and fast throughput.

For engineers reviewing the MAX165ACPN+ datasheet, MAX165ACPN+ pinout, MAX165ACPN+ application, or MAX165ACPN+ equivalent, key selection criteria include its 12-bit resolution, parallel 8-bit byte-wide output format, internal reference option, and CMOS-compatible digital interface timing.

Technical Context

The MAX165ACPN+ employs a successive-approximation register (SAR) architecture with internal track-and-hold, enabling accurate sampling of DC and low-frequency signals. It supports both internal (2.5 V) and external reference inputs, and features TTL/CMOS-compatible control signals including CONVST, RD, and CS.

Its parallel 8-bit data bus outputs conversion results in two bytes (high/low), synchronized to RD timing. The device guarantees monotonicity over temperature and maintains ±1 LSB differential nonlinearity (DNL) across its full operating range of 0°C to +70°C.

Key Specifications

Pinout & Package

MAX165ACPN+ is housed in a 28-pin plastic DIP (dual in-line package) with 0.6-inch width. Pin assignments are validated per Maxim's official MAX165 datasheet Rev. 3 (1997).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7892BN-10 and MAX196ACNI+, the MAX165ACPN+ uniquely balances 12-bit accuracy, internal reference, bipolar input support, and parallel byte interface in a single +5 V supply DIP package-making it optimal for legacy industrial controllers and retrofit data acquisition designs.

Availability

MAX165ACPN+ is available at Aetrix Electronics and suitable for industrial data loggers, test equipment, and medical instrumentation requiring stable component supply and long-lifecycle support.

Supply support for MAX165ACPN+ 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, automotive, and communications applications.

The MAX165ACPN+ belongs to Maxim's legacy high-accuracy data-conversion product line, engineered for applications demanding guaranteed linearity, simple interface, and robust operation in commercial-temperature environments.

FAQ

What is the maximum sampling rate achievable with the MAX165ACPN+?

The MAX165ACPN+ achieves a maximum sustained sampling rate of 100 kSPS under ideal timing conditions, based on its guaranteed 10 µs conversion time and two-byte parallel read cycle. Real-world throughput depends on host processor RD and CS timing margins, and the MAX165ACPN+ does not support automatic continuous conversion mode-each sample requires explicit CONVST assertion.

Does the MAX165ACPN+ require an external reference voltage?

No-the MAX165ACPN+ includes an internal 2.5 V reference that can be used directly for full-scale accuracy. The REF pin functions as both input and output: it sources 2.5 V when internal reference is enabled, or accepts an external reference from 1.2 V to 5 V. Using the internal reference eliminates external component count for the MAX165ACPN+ in many applications.

Can the MAX165ACPN+ interface directly with an 8-bit microcontroller?

Yes-the MAX165ACPN+ outputs conversion results via an 8-bit parallel bus (DB0–DB7), with upper 4 bits (DB8–DB11) delivered on a second RD pulse. This two-byte structure allows seamless connection to 8-bit microcontrollers like the 8051 or PIC18F series using standard I/O port handshaking, without address decoding or additional logic for the MAX165ACPN+.

What is the purpose of separate AGND and DGND pins on the MAX165ACPN+?

The MAX165ACPN+ uses separate analog ground (AGND) and digital ground (DGND) pins to isolate noise-sensitive analog circuitry-including the SAR core and track-and-hold-from digital switching transients. Proper star grounding or split-plane layout with single-point connection is required to maintain ±1 LSB linearity; mixing AGND and DGND degrades MAX165ACPN+ performance.

Is the MAX165ACPN+ compatible with modern PCB assembly processes?

The MAX165ACPN+ uses a through-hole 28-pin PDIP package, which is compatible with wave soldering and selective soldering processes. While not RoHS-compliant by original manufacture date (1990s), Aetrix Electronics supplies MAX165ACPN+ in fully traceable, tested, and lead-free-reflow-compatible lots meeting IPC-A-610 Class 2 requirements for the MAX165ACPN+.