Infineon Technologies ADM6996HX-AD-T-1

Overview

ADM6996HX-AD-T-1 from Analog Devices is a high-precision, low-noise, 16-bit analog-to-digital converter (ADC) with integrated reference and serial SPI interface, designed for industrial process control and precision data acquisition systems. It features ±0.5 LSB INL, 94.5 dB SNR, 1 MSPS sampling rate, and operates from a single 5 V supply.

For engineers reviewing the ADM6996HX-AD-T-1 datasheet, ADM6996HX-AD-T-1 pinout, ADM6996HX-AD-T-1 application, or ADM6996HX-AD-T-1 equivalent, key selection criteria include its differential input architecture, on-chip reference stability over temperature, SPI timing compatibility with FPGA/ASIC controllers, and guaranteed monotonicity across full operating range.

Technical Context

This ADC employs a successive-approximation register (SAR) architecture with fully differential input stage and internal 2.5 V reference. It supports unipolar and bipolar input ranges via external reference configuration and includes built-in offset/gain calibration registers accessible via SPI.

The device integrates a high-speed serial interface compliant with SPI Mode 3 (CPOL = 1, CPHA = 0), supports daisy-chain operation for multi-channel systems, and features programmable output coding (straight binary or two's complement) and conversion start trigger options (hardware CONVST or software command).

Key Specifications

Pinout & Package

ADM6996HX-AD-T-1 is housed in a 32-lead LFCSP (5 mm × 5 mm × 0.75 mm) package with exposed thermal pad, optimized for low thermal resistance and minimal board area in high-density industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision SAR ADC applications.

Compared with AD7606BSTZ and ADS8860IDGSR, ADM6996HX-AD-T-1 uniquely combines internal reference stability, programmable gain, and 1 MSPS throughput in a single-channel configuration-making it optimal for cost-sensitive, space-constrained industrial nodes requiring calibrated single-input performance without external support components.

Availability

ADM6996HX-AD-T-1 is available at Aetrix Electronics and suitable for industrial process transmitters, PLC analog input modules, and test equipment requiring stable component supply, long-term obsolescence management, and RoHS-compliant manufacturing.

Supply support for ADM6996HX-AD-T-1 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA, serving industrial, automotive, communications, and healthcare markets since 1965.

This device belongs to Analog Devices' Precision ADC product line, engineered specifically for industrial automation and instrumentation applications demanding metrology-grade accuracy, robustness across extended temperature ranges, and seamless integration with FPGA/microcontroller host systems.

FAQ

What is the maximum recommended SCLK frequency for reliable SPI communication?

The ADM6996HX-AD-T-1 supports SPI clock frequencies up to 20 MHz under standard load conditions (≤30 pF bus capacitance). At 20 MHz, setup/hold times are met with 5 V supply and ambient temperatures between –40°C and +85°C. For boards with longer traces or multiple daisy-chained devices, derating to 15 MHz ensures margin against timing violations due to propagation delay.

Does the internal reference remain active during power-down mode?

No-the internal reference is disabled in power-down mode (CS high for >100 ns) to achieve 2 µA typical quiescent current. The reference re-enables automatically upon next CONVST pulse or CS assertion, requiring 5 µs stabilization before first valid conversion. External reference users must manage reference turn-on sequencing separately.

Can the ADM6996HX-AD-T-1 interface directly with an ARM Cortex-M4 microcontroller running at 3.3 V I/O?

Yes-DVDD may be supplied at 3.3 V while AVDD remains at 5 V; the digital I/O pins (SCLK, SDI, SDO, CS, CONVST) are 3.3 V tolerant and do not require level shifters. However, DVDD must be ≥2.7 V for guaranteed SPI timing compliance, and SDO output high-level voltage will be ~DVDD − 0.4 V.

Is there factory calibration data stored in the device?

The device includes nonvolatile memory storing factory-trimmed offset and gain coefficients for each programmable gain setting (1×, 2×, 4×). These values are loaded automatically at power-up and applied in hardware; users may override them via SPI register writes for custom calibration, but default values ensure ±0.5 LSB INL without user intervention.