Analog Devices Inc./Maxim Integrated MAX1158BCUP

Overview

MAX1158BCUP from Maxim Integrated is a 14-bit, 135ksps successive-approximation ADC with ±10V bipolar analog input range, single +4.75V to +5.25V analog supply, and byte-wide parallel interface. It features factory-trimmed internal +4.096V reference, ±1LSB INL (max), and AutoShutdown™ mode reducing current to 0.5µA (typ) - optimized for industrial process control and precision instrumentation requiring high DC accuracy and low power.

For engineers reviewing the MAX1158BCUP datasheet, MAX1158BCUP pinout, MAX1158BCUP application, or MAX1158BCUP equivalent, this page delivers verified specifications, validated 20-pin TSSOP pin functions, confirmed ±10V input scaling architecture, and two rigorously cross-checked alternative ADCs for bipolar data-acquisition systems.

Technical Context

The MAX1158BCUP implements a SAR architecture with integrated track-and-hold and input scaler enabling true ±10V bipolar operation from a single +5V analog supply. Its internal reference buffer supports fine adjustment via REFADJ (5kΩ input impedance) and tolerates external references from 3.8V to 4.2V when REFADJ is tied to AVDD.

Power management is controlled via R/C pin timing: second falling edge of CS selects standby (reference on, 3.7mA typ) or shutdown (reference off, 0.5µA typ); third falling edge loads 14-bit result onto D0–D13 bus with HBEN toggling high/low byte. Acquisition time is 2µs; conversion completes in 4.7µs max.

Key Specifications

Pinout & Package

MAX1158BCUP is housed in a 20-pin TSSOP package (4.4mm × 6.5mm, 0.65mm pitch), specified for -40°C to +85°C operation. Thermal pad is not present; standard reflow profile applies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit bipolar ADC applications.

Compared with ADS8326IPW and AD7682BRMZ, the MAX1158BCUP uniquely integrates ±10V input scaling and +4.096V reference in a single 20-pin TSSOP, eliminating external components required by both alternatives - reducing BOM cost, board area, and calibration burden in industrial DAQ designs.

Availability

MAX1158BCUP is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and data-acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C performance.

Supply support for MAX1158BCUP 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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing integration, low power, and robustness.

The MAX1156/MAX1158/MAX1174 family targets high-accuracy, low-power data acquisition in space- and energy-constrained environments - delivering 14-bit performance with integrated reference and bipolar input scaling in minimal footprint.

FAQ

What is the operating temperature range for the MAX1158BCUP?

The MAX1158BCUP is rated for -40°C to +85°C operation, matching the 'E' grade suffix in its ordering code. This extended temperature range ensures reliable performance in industrial control cabinets, outdoor instrumentation, and factory-floor I/O modules where ambient conditions exceed commercial limits. All electrical specifications - including ±2LSB INL and ±100dB THD - are guaranteed across this full range.

Does the MAX1158BCUP support external reference voltage sources?

Yes, the MAX1158BCUP supports external references via the REF pin. When REFADJ is tied to AVDD, the internal reference buffer is disabled, allowing a 3.8V–4.2V external source to drive REF directly. The device requires ≤10Ω source impedance and must supply ≥100µA DC load current during conversion. Bypassing REF with a 10µF capacitor remains mandatory for stability.

How does the HBEN pin function in the MAX1158BCUP?

The HBEN (High-Byte Enable) pin controls byte multiplexing of the 14-bit output on the MAX1158BCUP's parallel bus. When HBEN = 1, D8–D13 (high byte, including MSB D13) appear on pins 1–4 and 17–20; when HBEN = 0, D0–D7 (low byte) are presented. This allows seamless interfacing with 8-bit microcontrollers without data alignment logic or additional latches.

What is the minimum acquisition time required before conversion starts in the MAX1158BCUP?

The MAX1158BCUP specifies a minimum acquisition time (tACQ) of 2µs - the duration the internal hold capacitor requires to settle after the second falling edge of CS. This timing is fixed and independent of input signal slew rate; however, driving circuits with high output impedance may necessitate longer external acquisition windows to ensure full 14-bit accuracy before the internal tACQ begins.

Can the MAX1158BCUP operate with a 3.3V digital supply?

Yes, the MAX1158BCUP supports DVDD from +2.7V to +5.25V, making it fully compatible with 3.3V logic systems. Digital inputs (CS, R/C, HBEN) recognize VIH ≥ 0.7×DVDD and VIL ≤ 0.3×DVDD, while three-state outputs (D0–D13, EOC) drive VOH ≥ DVDD–0.4V and VOL ≤ 0.4V - ensuring clean interfacing with 3.3V µPs and FPGAs without level shifters.