DS8500

PRODUCTION

HART Modem

Fewer External Components and a Small 20-Pin TQFN Package Reduce System Cost and Size

Data Sheet (Rev. 3)

Part Models: 2
1ku List Price: Starting From $6.23

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Part Details

Single-Chip, Half-Duplex Modem Overlays 1200bps FSK Digital Communication on Top of Installed 4mA–20mA Current Loop Infrastructure
Digital Signal Processing Provides Reliable Input Signal Detection in Noisy Conditions
Standard Component 3.6864MHz Crystal Reduces System Cost
Fully Tested and Verified as a HART-Registered Modem IC
Integrated Solution Requires Minimal Power and Space
- 2.7V to 3.6V Operating Voltage
- 285µA (max) Current Consumption
- Space-Saving, 5mm x 5mm x 0.8mm, 20-Pin TQFN Package
- Few External Components Required

Part Models: 2
1ku List Price: Starting From $6.23

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
DS8500-JND+	20-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
DS8500-JND+T&R	20-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

Software Development 2

Evaluation Kits

Evaluation Kit for the DS8500

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Features and Benefits

The EV Kit Provides Fast and Simple Evaluation by Providing a Total HART Communications Chain on Board
Example HART Master and Field Device Circuits Demonstrate Usage in the Two Most Common HART Connection Configurations
HART Registered Modem IC
On-Board Isolated 4mA–20mA Communications Loop
MAXQ622 USB Microcontroller with Demo Firmware
External Connections Allow for Advanced Evaluation of the DS8500 in Other Configurations

Product Details

The DS8500 evaluation kit (EV kit) provides a convenient and a quick platform to evaluate the DS8500 HART® modem. It allows quick evaluation through a demonstration mode and in-depth evaluation using HART Communication Foundation (a part of FieldComm Group) tools.

Applications

4-20mA Loop-Powered Transmitters for Temperature, Pressure, Flow, and Level Measurement
HART Modem Interface Connectivity
HART Multiplexers

Reference Designs

Novato (MAXREFDES16#): 4-20mA Loop-Powered Temperature Sensor with HART

View Detailed Reference Design

Features and Benefits

2-, 3-, or 4-wire RTD sensor input
-200°C to +850°C measured temperature range
-40°C to +85°C operating range
0.03°C temperature resolution
< 0.05% span error or ±0.2°C at +23°C (whichever is greater)
< 0.1% span error or ±1.0°C over operating range
12V to 40V supply voltage range
200µA RTD excitation current
Auto compensation of wire resistance for 3-wire RTD
4–20mA current loop output
10Ω to 1kΩ loop load
Highway addressable remote transducer (HART) communication protocol requires minimum load of 230Ω
Sensor burnout detection
NAMUR down scale: < 3.2mA
NAMUR up scale: programmable from 20.5mA to > 24mA
Loop current limiter: 30mA ±5mA
HART protocol compatible