MAX11284

Dual 24-Bit, Low-Power, High-SNR, 4ksps Delta-Sigma ADCs with Integrated PGAs

Industry's Only Dual 24-bit Sigma-Delta ADC for Seismic Applications

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Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

High Resolution for Instrumentation Applications That Require a Wide Dynamic Range
- 131dB SNR at 31.25sps in Buffer Mode
- 114dB SNR at 2000sps in Buffer Mode
Low Power
- Digital Current with FIR Filter, 1ksps: 500μA
- Analog Current PGA Low-Power Mode: 2.1mA
- Sleep Current: 1.2μA
High Accuracy for DC Measurements
- 1ppm INL (typ), 4ppm (max)
Single/Split Analog Supplies Provide Input Voltage Range Flexibility
- 2.7V to 3.6V (Single-Supply) or ±1.8V (Split Supplies)
Digital Filters
- Programmable SINC + FIR + IIR
- Linear/Minimum Phase Response
- Programmable High-Pass Filter
- Selectable FIR Data Rates: 31.25sps to 4ksps
Enables System Integration
- Low-Noise and Low-Power mode PGA with Gains of 1, 2, 4, 8, 16, 32, 64, 128
- Signal Buffer Optional
- 2 General-Purpose I/Os
Integrated Offset and Gain Self-Calibration and System Gain and Offset Calibration Registers
Small 40-Pin TQFN Package

Product Details

The MAX11284 is a dual 24-bit delta sigma ADC that achieves excellent SNR while dissipating a low 3.6mW per ADC. Precision DC and AC measurements can be made at sample rates up to 4ksps. Integral nonlinearity is guaranteed to 4ppm maximum and the THD is -120dB. The MAX11284 communicates through an SPI-compatible serial interface and is available in a small, 40-pin TQFN package.

The PGAs can operate in either low-noise (9.1nV/√Hz) or low-power (13.6nV/√Hz) mode, and have selectable gain values ranging from 1x to 128x. Optional buffers are also included to provide isolation of the signal inputs from the switched capacitor sampling network. This allows the ADCs to be used with high-impedance sources without compromising available dynamic range.

The MAX11284 operates from a single 2.7V to 3.6V analog supply, or split ±1.8V analog supplies, allowing the analog input to be sampled below ground. The digital supply range is 2.0V to 3.6V, allowing communication with 2.5V, 3V, or 3.3V logic.

Applications

ATE
High-Precision Portable Sensors
Medical Equipment
Scientific Instrumentation
Seismic Data Acquisition

Product Categories

A/D Converters (ADC)
- Simultaneous Sampling A/D Converters

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

MAX11284EVKIT

Evaluation Kit for the MAX11284

MAX11284EVKIT

View Detailed Evaluation Kit Information

The evaluation kit (EV kit) demonstrates the MAX11284 dual 24-bit, dual-channel, 16ksps Delta-Sigma ADCs with integrated PGA. The EV kit includes a graphical user interface (GUI) that provides communication from the target device to the PC. The EV kit can operate in multiple modes:

Standalone Mode: In “standalone” mode, the EV kit is connected to the PC through a USB cable and performs a subset of the complete EV kit functions. Sample rate and sample size are limited.
FPGA Mode: In FPGA mode, the EV kit is connected to an Avnet ZedBoard^™ through a low-pin-count FMC connector. The ZedBoard features a Xilinx^® Zynq^®-7000 SOC that connects to the PC through an Ethernet port, which allows the GUI to perform different operations with full control over mezzanine card functions. The EV kit with FPGA platform performs the complete suite of evaluation tests for the target IC.
User-Supplied SPI Mode: In addition to the USB and FMC interfaces, the EV kit provides two 12-pin Pmod -style headers for user-supplied SPI interface, to connect the signals for SYNC, Active-Low RDYB, SCLK, DIN, DOUT, and Active-Low CS.

The EV kit includes Windows XP^®, Windows^®7, and Windows 8-compatible software to utilize the features of the IC. The EV kit GUI allows different sample sizes, adjustable sampling rates, on-board or external reference options, and graphing software that includes the FFT and histogram of the sampled signals with the ability to save plots in .jpg or .csv formats.

The ZedBoard accepts a +12V AC-DC wall adapter. The EV kit can be powered by either the ZedBoard or a local 12V supply. The EV kit has on-board transformers and digital isolators to separate the IC from the ZedBoard/on-board processor.

The MAX11284 EV kit comes with a MAX11284ETL+ in a 40-pin TQFN package installed.

Applications

ATE
High-Precision Portable Sensors
Medical Equipment
Scientific Instrumentation
Seismic Data Acquisition

Features & Benefits

High-Speed USB, FMC Connector, and Pmod connectors
5MHz SPI Interface
Various Sample Sizes and Sample Rates
Collects Up to 1 Million Samples (with FPGA platform)
Time Domain, Frequency Domain, and Histogram Plotting
Sync In and Sync Out for Coherent Sampling for Higher Input Frequency (with FPGA platform)
On-Board 2.5V Voltage References (MAX6126)
Proven PCB Layout
Fully Assembled and Tested
Windows XP, Windows 7 and Windows 8-Compatible Software

Documentation & Resources

Data Sheets

MAX11284: Dual 24-Bit, Low-Power, High-SNR, 4ksps Delta-Sigma ADCs with Integrated PGAs Data Sheet (Rev. 0)
5/23/2016

PDF

1M

Reliability Data

MAX11284 Reliability Data
1/12/2023

PDF

186K

Tools & Simulations

IBIS Models

IBS

274.98K

MAX11284 IBIS Model

Software Development

MAX11284 24-Bit ADC EV Kit Software, 1.1.0

ZIP

MAX11284EVKIT FPGA boot.bin file, 1.0.0

BIN

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
MAX11284ETL+	Material Declaration	Reliability Data	Thin Quad Flatpack, No Leads	Ultra Librarian SamacSys
MAX11284ETL+T	Material Declaration	Reliability Data	Thin Quad Flatpack, No Leads	Ultra Librarian SamacSys
Wafer Fabrication Data		MAX11284 Reliability Data

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(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.