Analog Devices Inc./Maxim Integrated MAX1132BEAP+

Overview

MAX1132BEAP+ from Maxim Integrated is a 16-bit, 200ksps successive-approximation analog-to-digital converter (ADC) with integrated +4.096V reference, input scaling network, internal track/hold, and three programmable digital outputs. It operates from a single +4.75V to +5.25V supply, supports ±12V bipolar or 0–+12V unipolar input ranges, and delivers ≥85dB SINAD with 1.5LSB INL. It is used in high-precision industrial data-acquisition systems requiring stable DC accuracy and low-noise sampling.

For engineers reviewing the MAX1132BEAP+ datasheet, MAX1132BEAP+ pinout, MAX1132BEAP+ application, or MAX1132BEAP+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply support for volume deployment in medical instrumentation and process control hardware.

Technical Context

The MAX1132BEAP+ uses a successive-approximation register (SAR) architecture with integrated track/hold and software-configurable unipolar/bipolar input scaling. Its internal bandgap reference (±20ppm/°C tempco) feeds a precision scaler that maps ±12V inputs to the ADC core while operating from a single 5V supply - eliminating need for external level-shifting circuitry.

It supports three clock modes: internal conversion clock (freeing MCU resources), external serial clock (SPI/QSPI/MICROWIRE-compatible), and on-demand calibration triggered via Control Byte (M1=0, M0=1). The SSTRB strobe synchronizes DSP interfacing (e.g., TMS320), and three push-pull logic outputs (P0–P2) directly control external multiplexers or PGAs without added glue logic.

Key Specifications

Pinout & Package

MAX1132BEAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, footprint compatible with industry-standard 20-SSOP PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7682BCPZ-RL7, MAX1132BEAP+ uniquely integrates ±12V input scaling, three programmable outputs, and on-demand calibration - making it irreplaceable in space-constrained, high-voltage industrial DAQ designs where component count reduction is critical.

Availability

MAX1132BEAP+ is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and data-acquisition systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX1132BEAP+ 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 MAX1132BEAP+ belongs to Maxim's high-accuracy SAR ADC product line, engineered specifically for industrial and medical data-acquisition systems needing integrated reference, input scaling, and low-power operation from a single 5V supply.

FAQ

What input voltage ranges does the MAX1132BEAP+ support?

The MAX1132BEAP+ supports software-selectable unipolar (0 to +12V) and bipolar (±12V) input ranges. This is enabled by its integrated input scaling network, which maps these external voltages to the internal ADC core without external op-amps. The range is selected via bit 6 (UNI/BIP) of the 8-bit Control Byte, and the setting persists across conversions until reconfigured.

Does the MAX1132BEAP+ require an external reference?

No, the MAX1132BEAP+ includes a precision +4.096V internal reference with ±20ppm/°C tempco and 4.056V to 4.136V initial accuracy. An external reference (3.0V to 4.2V) can be used by disabling the internal buffer via REFADJ, but it is not required. The internal reference eliminates BOM cost and layout area typically needed for external references.

How do the P0, P1, and P2 pins function on the MAX1132BEAP+?

The P0, P1, and P2 pins are user-programmable CMOS push-pull outputs controlled by bits [2:0] of the Control Byte. They power up low and retain their state during hardware or software shutdown. These outputs are commonly used to select channels on an 8-channel analog multiplexer or set gain on a programmable-gain amplifier - removing need for discrete GPIO expanders.

What is the purpose of the SSTRB pin on the MAX1132BEAP+?

The SSTRB (Serial Strobe) pin provides timing synchronization for external processors. In internal clock mode, it goes low at conversion start and high at completion (≤6µs pulse). In external clock mode, it pulses high for one SCLK cycle before MSB output. This enables precise alignment with TMS320 DSP interrupt handling or FPGA sampling windows - critical for deterministic real-time systems.

Can the MAX1132BEAP+ perform on-chip calibration, and how is it initiated?

Yes, the MAX1132BEAP+ features on-demand software calibration to correct offset, gain, and INL errors. It is initiated by writing a Control Byte with M1 = 0 and M0 = 1 (bit positions 3 and 4). Calibration must be performed in the same clock mode (internal/external) used for conversions and is recommended after power-up, reset, or ambient temperature shifts >10°C.