Analog Devices Inc./Maxim Integrated MAX1134BEAP

Overview

The MAX1134BEAP from Maxim Integrated is a 16-bit, 150ksps successive-approximation analog-to-digital converter (SAR ADC) with integrated input scaling, track/hold, internal clock, and three programmable digital outputs. It operates from a single 3.3V supply (3.135V–3.465V), supports ±6V or 0 to +6V analog input ranges, delivers −100dB THD and 1LSB typical INL, and targets high-precision industrial process control and medical instrumentation.

For engineers reviewing the MAX1134BEAP datasheet, MAX1134BEAP pinout, MAX1134BEAP application, or MAX1134BEAP equivalent, key selection considerations include its 20-pin SSOP package, −40°C to +85°C temperature rating, SPI/QSPI/MICROWIRE-compatible serial interface, on-demand calibration capability, and software-selectable unipolar/bipolar input modes.

Technical Context

The MAX1134BEAP implements a capacitive DAC-based SAR architecture with an integrated input scaler that maps ±6V or 0–+6V external signals to the internal ADC core while operating from a single 3.3V supply. Its internal track/hold circuit enables accurate sampling at up to 150ksps in bipolar mode without external components.

It supports three clocking modes-internal clock, short acquisition (24-clock), and long acquisition (32-clock)-with SSTRB providing precise conversion timing feedback. Calibration corrects offset, gain, INL, and DNL errors via software command, and the three push-pull P0–P2 outputs support direct control of external multiplexers or PGAs.

Key Specifications

Pinout & Package

MAX1134BEAP is housed in a 20-pin SSOP package (0.154" wide, 0.025" pitch), specified for operation from −40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7682BRMZ, the MAX1134BEAP uniquely combines ±6V input scaling, three programmable outputs, and on-demand calibration in a single 3.3V 20-pin SSOP package-making it optimal for space-constrained, multi-sensor industrial and medical systems requiring field-reconfigurable analog front ends.

Availability

MAX1134BEAP is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and portable data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1134BEAP 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 MAX1134BEAP belongs to Maxim's high-accuracy SAR ADC product line, engineered specifically for systems needing wide-input-range digitization, low-power operation, and integrated signal conditioning without external components.

FAQ

What input voltage ranges does the MAX1134BEAP support?

The MAX1134BEAP supports software-selectable unipolar (0 to +6V) or bipolar (±6V) analog input ranges. This is enabled by its integrated input scaling network, which maps external signals to the internal ADC core while operating from a single 3.3V supply. The MAX1134BEAP does not support the ±2.048V range-that is specific to the MAX1135 variant. Input range selection is controlled via bit 6 (UNI/BIP) of the serial control byte.

How does the MAX1134BEAP handle calibration, and when is it required?

The MAX1134BEAP features on-demand software calibration that corrects offset, gain, integral nonlinearity (INL), and differential nonlinearity (DNL). Calibration is initiated by writing a control byte with M1 = 0 and M0 = 1. It must be performed after power-up or reset, and repeated if ambient temperature changes by more than +10°C, supply voltage shifts by 100mV, or the reference voltage changes. Calibration in the MAX1134BEAP runs in the same clock mode used for conversions to ensure accuracy alignment.

What is the function of the SSTRB pin on the MAX1134BEAP?

The SSTRB (Serial Strobe) pin on the MAX1134BEAP provides precise timing feedback for synchronization. In internal clock mode, SSTRB goes low at conversion start and high at completion (pulse width ≤7 µs). In external clock mode, it pulses high for one clock cycle before the MSB decision. SSTRB enables direct interfacing with TMS320 DSPs and simplifies FPGA-based data capture by eliminating the need for internal timing counters-ensuring deterministic read timing for the MAX1134BEAP conversion result.

Can the MAX1134BEAP operate from a single 3.3V supply, and what are the supply current requirements?

Yes, the MAX1134BEAP operates from a single 3.3V supply (AVDD and DVDD both at 3.135V–3.465V). Typical analog supply current is 8.0 mA at 150ksps in bipolar mode; digital supply current adds ~1–2 mA. In shutdown mode (SHDN = low), total current drops to 1.2 µA. The MAX1134BEAP also supports software power-down, reducing current to <20 µA at slower data rates-making it suitable for battery-powered portable equipment where the MAX1134BEAP's low-quiescent operation extends runtime.

What are the roles of the P0, P1, and P2 pins on the MAX1134BEAP?

The P0, P1, and P2 pins on the MAX1134BEAP are user-programmable push-pull CMOS outputs controlled by bits 0–2 of the serial control byte. They retain their state during hardware or software shutdown and are initialized to low at power-on reset. These outputs enable direct control of external components such as 8-channel analog multiplexers or programmable-gain amplifiers-reducing MCU GPIO usage and simplifying signal-path configuration in multi-sensor systems using the MAX1134BEAP as the central ADC.