AC4790 Series

Recommended for New Design (RND)

Overview

The high-performance AC4790 radio modules utilize Laird's masterless protocol, allowing each radio module to communicate with any other in-range radio module for true peer-to-peer operation. Using field-proven 900MHz FHSS technology that needs no additional site licensing*, AC4790s reject interference, enable co-located system operation, and ensure data integrity. The AC4790's protocol features a dynamic addressing scheme, that simplifies node-to-node communication. The radio module enables identification of the most efficient transmission path, so OEMs can design routing sequences that optimize the RF network. This makes the AC4790 ideal for a wide variety of industrial applications that must rely on smooth, constant data flow. Developer tools and comprehensive technical support are available to aid integration. Let Laird help you find the best fit for your application.

Note: Some variants of the AC4790 and related DVK and SDK variants have reached end of production and are available on a limited basis only. Find the End of Life Announcement in the Documentation tab below. Only the following part numbers are affected:

- AC4790-1000M-485

- AC4790-200A

- AC4790LR-200M

Specifications

Wireless Specification
900 MHz FHSS
Chipset (Wireless)
TI CC1010
Antenna Options
MMCX Connector
Antenna Type
AC4790–200: Integral or external antenna, AC4790–1000: External antenna
Channels
AC4790-1x1/-200: 16 channels, US/Canada AC4790-1x1/-1000: 32 channels, US/Canada AC4790-1x1/-200/-1000: 8 channels, Australia/US/Canada
Connector Type
SDIO
Dimension (Height - mm)
5 mm
Dimension (Length - mm)
49 mm
Dimension (Width - mm)
42 mm
Frequency
902 – 928 MHz US/Canada, 915 – 928 MHz Australia, US/Canada (optional)
Interface (Serial)
Serial Interface Options: 3.3V
Logical Interfaces
20-Pin Mini Connector
Max Transmit Power
AC4790-1x1: 10 mW typical Conducted (no antenna), 20 mW typical EIRP (3dBi gain antenna); AC4790-200: 100 mW typical (no antenna), 200 mW typical (3dBi gain antenna); AC4790-1000: 743 mW typical (no antenna),1486 mW typical (3dBi gain antenna)
Other
RF Baud Rate: 76.8kbps Fixed
Protocols
FHSS Wireless Protocol
Safety Standards
Meets all safety and emissions requirements but requires separation from the end-user to adhere to safety standards.
Security
One byte System ID. 56-bit DES encryption key.
Voltage
AC4790–200: 3.3V-5.5V, AC4790–1000: pin 10: 3.3V-5.5V; pin 11: 3.3V +/-3%
Weight
< 0.75 oz (< 21 g)
Channels Output Power Data Rate Dimension (Height - mm) Dimension (Length - mm) Dimension (Width - mm) Receive Sensitivity Compliance Operating Humidity Input Power Logical Interfaces Network Architecture Power Consumption Power Consumption (Rx) Power Consumption (Tx) Storage Humidity Frequency Frequency Range (Max) Frequency Range (Min)
AC4790-1000m 32 Channels US/Canada 743 mW - 1486 mW 76.8 Kbps 5.08 mm 48.26 mm 41.91 mm -110 dBm None 10% - 90% Pin 10: 3.3 – 5.5V ±50 mV ripple, Pin 11: 3.3 ±3%, ±100 mV ripple SDIO Peer-to-peer Up to 1300 mA 30 mA 1300 mA 10% - 90% 902 – 928 MHz US/Canada 915 – 928 MHz Australia, US/Canada (optional) 928 MHz 902 MHz
Antenna Options Channels Output Power Connector Type Data Rate Dimension (Height - mm) Dimension (Length - mm) Dimension (Width - mm) Receive Sensitivity Compliance Weight Operating Humidity Input Power Logical Interfaces Network Architecture Power Consumption Power Consumption (Rx) Power Consumption (Tx) Protocols Security Storage Humidity Wireless Specification Frequency Frequency Range (Max) Frequency Range (Min)
AC4790LR-1000M MMCX Connector 32 Channels 743 mW - 1486 mW 20-Pin Mini Connector 76.8 Kbps 5.08 mm 48.26 mm 41.91 mm -110 dBm None .705 oz (20 g) 10% - 90% 3.3 V SDIO Peer-to-peer Up to 1300 mA 30 mA 1300 mA FHSS Wireless Protocol One-byte system ID 10% - 90% 900 MHz FHSS 900 MHz 928 MHz 902 MHz
Channels Output Power Data Rate Dimension (Height - mm) Dimension (Length - mm) Dimension (Width - mm) Receive Sensitivity Compliance Operating Humidity Input Power Logical Interfaces Network Architecture Power Consumption Power Consumption (Rx) Power Consumption (Tx) Storage Humidity Frequency Frequency Range (Max) Frequency Range (Min)
AC4790-200M 16 Channels US/Canada, 8 channels, Australia/US/Canada 5mW-200mW variable 76.8 Kbps 5.08 mm 48.26 mm 41.91 mm -100 dBm None 10% - 90% 3.3 – 5.5V, ±50 mV ripple SDIO Peer-to-peer Up to 106 mA 106 mA 38 mA 10% - 90% 900 MHz 928 MHz 902 MHz

Documentation

Name Part Type Last Updated
Application Note - Enabling the Security Pane in the RAMP Configuration Utility All Application Note 03-01-19
Radio Equipment Directive (RED) Updates - May 2017 All Certification 03-01-19
RoHSII - EU WEEE Compliance BT RAMP v1 8 All Certification 07-12-19
User Guide - AC4790 Module All Documentation 03-01-19
Hardware Integration Guide - AC4790 Module All Documentation 03-01-19
EOL - RAMP - Nov-15-2015 All Documentation 03-01-19
Product Brief - AC4790 All Datasheet 03-01-19
Product Brief - RAMP Development Kits All Brochure 05-16-19
Laird Configuration and Test Utility Software - RAMP Modules All Documentation 03-01-19
RAMP Config Tool v6.07.zip All Software 01-17-19

FAQ

I have TX API/RX API enabled on my RM024/AC4490/AC4790/CL4490/CL4790 and I'm seeing errors when I run the Range Test, why?

The API features in the RAMP radios allow for dynamically addressing packets (TX API), getting the sender's information when receiving a packet (RX API), and knowing when a packet was successfully transmitted (Send Data Complete). TX API and RX API both append a header to transmitted or received data while Send Data Complete is a separate message that gets sent to the transmitting radio's host when the packet that was transmitted is received successfully at the other end. The Laird Configuration and Test Utility Range Test does not account for these additional headers or packets when 'Create Data' is used in the 'Transmit Packet Selection' field. It will not append headers to the transmitted data so if TX API is enabled all packets for transmission will be tossed because of the lack of a header. It will not account for the additional header that is added to the received packet when RX API is enabled so all packets received will be received as "Data Error". It will not account for the extra packet sent to the transmitting radio's Host when Send Data Complete is enabled so anytime this message is sent it will be seen as a "Data Error".  In order to work with the API features on the RAMP radios you should use the scripting feature to write an API script and load it in the 'Transmit Packet Selection' field as 'Load File'.

More information about scripting can be found in Appendix 1 of the Laird Configuration and Test Utility Software - RAMP Modules.pdf

 

What is the main difference between the AC4490 and the AC4790?

The AC4790 and AC4490 are identical hardware modules, they only differ in the firmware that is loaded to them. The AC4490 has a server / client architecture while the AC4790 has a masterless architecture. The AC4490 requires a server in each network that is used to keep all the clients in sync; all radios hop together through the frequency bins. The AC4790 does not require a server to keep sync and therefore all radios are hopping independently through the frequency bins and only synchronize when there is data to be transmitted.  A masterless radio can be used to build a mesh-type network where a server / client is limited to a star network.