Bluetooth Low Energy Current Consumption Measurements
www.cypress.com
Document No. 002-14934 Rev. *C
3
The BLE devices can either be dual or single mode. The dual-mode devices are combined with a Bluetooth device
for use in PCs, cell phones, and tablets. The single-mode devices are BLE only, and are designed to have very
low power consumption. The single mode devices are typically small and can operate for a long period of time
using a coin cell battery.
The
CYW4330
is a dual mode device with Bluetooth and BLE.
lists specifications for the BLE and Bluetooth technology.
5
Test Setup
This section describes the setup and procedures to measure the basic current consumption in BLE modes.
The current consumption is not measured in the typical method that is by using a multimeter, or adding a series
resistor and an oscilloscope. The recommended method is to use a power analyzer. A power analyzer is power
supply with the ability to make detailed current measurements. A power analyzer is used to measure peak current
and average current consumption over a longer period of time. A power analyzer can measure both without hav-
ing to use multiple pieces of equipment such as a scope and multimeter. BLE is mostly in sleep mode with a very
short active period.
5.1
System Requirements
The system requirements are listed below.
■
Host system requirements
■
A personal computer running Microsoft® Windows® operating system is required to use BlueTool. Cypress
recommends running Windows XP; however, other versions of Windows are supported.
■
Hardware requirements
❐
Agilent N6705A with N6761A precision power supply
❐
CYW4330 McLaren daughterboard
❐
BCM9UMB Bluetooth/WLAN motherhood
■
Software Requirements
BlueTool is a proprietary Cypress software tool for exercising, testing, scripting, debugging, and programming
devices that use Cypress Bluetooth chips. BlueTool runs on a standard PC running the Microsoft® Windows®
operating system. BlueTool interfaces with the Cypress Bluetooth chips at the HCI protocol layer.
Note:
For information on how to install BlueTool contact your Cypress representative.
Table 2. BLE and Bluetooth Specifications
Specification
BLE Technology
Bluetooth Technology
RF section enable time
0.6 ms to 1.2 ms
22.5 ms
Device connection times
3 ms
100 ms
Peak transmit power
10 dBm
20 dBm
Frequency range
2402 to 2480 MHz
2402 to 2480 MHz
RF channel spacing
2 MHz
1 MHz
Channels used
40 channels
80 channels
