Wireless for Implantable Medical Devices
The ultra-low-power ZL70103 RF transceiver chip supports a very high data rate RF link for medical implantable communication applications. The chip’s unique design allows patient health and device performance data to be quickly transmitted, with little impact to the useful battery life of the implanted device. The ZL70103 is designed for use both in implanted medical devices and in base stations and operates in the 402-MHz – 405-MHz MICS band (or Medical Implantable Communications Service band, which is a subset of the designated MedRadio frequency band). Merging Microsemi’s ultra-low-power and RF expertise, the ZL70103 delivers key performance and integration benefits. The chip is very flexible and supports several low-power wake-up options. Ultra-low-power operation is achieved using the 2.45-GHz ISM-band wake-up receiver option. The high level of integration includes a MAC (media access controller) providing coding and decoding of RF messages, forward error correction, and CRC (cyclical redundancy check) error detection to achieve an extremely reliable link. A standard serial peripheral interface (SPI) provides for easy access by the application.
In order to better support a wide range of use cases, the ZL70103 offers two new data rates of 18.18 and 40 kbit/s in addition to the data rates of 200 and 400 kbit/s used in its predecessor IC (the ZL70102). These new data rates provide significantly enhanced link budgets for difficult use cases such as deep implants or longer range applications.
The ZL70103 is ideal for RF telemetry systems used in implantable medical devices, external remote monitoring, and programming equipment utilizing the MICS band within the designated MedRadio frequency band. Such applications/uses include:
- Implantable cardioverter defibrillators (ICDs)
- Implantable sensors and diagnostic devices
- Drug pumps
- Short-range body area network applications using the 433-MHz ISM band
- Meets performance, power, and size requirements for implanted communication systems
- Operates in the 402-MHz – 405-MHz (10 MICS-band channels) and 433-MHz – 434-MHz (2 ISM-band channels) frequency bands
- Wide range of high-performance data rates (18.18, 40, 200, 400 kbit/s raw data rate) enabling power-efficient, bidirectional transmission of patient and device data in a variety of use cases from shallow to deep implants
- Ultralow power consumption that extends implanted device battery operating life:
- 5 mA average TX/RX current
- 290 nA average SLEEP/SNIFF current (1-second strobe period)
- High level of integration System-on-Chip (SoC) design with integrated high-performance MAC with automatic error handling and flow control
- Very few external components (three components plus antenna matching)
- Compliant with MICS/MedRadio, FCC, ETSI and IEC standards
The ZL70103 MICS-band RF transceiver IC is supported by a full featured Application Development Kit.
Docs & Specs
|Product Preview||ZL70103 Product Preview|
|Design Manual||Available on privileged sites*|
|ADK Product Preview||(ZLE70103 product preview to be supplied)|
|ADK Software and Documentation||Available on privileged sites*|
|ADK Source Code and Documentation||Available on privileged sites*|
*Go to myCMPG and log in for access. Once logged in, click on Medical Wireless. Then under My Privileged Services, click on ZL7010X or ZL7010X Source Code, as appropriate.
ZL70103-Based RF Modules
- ZL70323 MICS-Band RF Miniaturized Standard Implant Module (MiniSIM)
- ZL70123 MICS-Band RF Base Station Module (BSM)
ZL70103-Based Implant and RF Base Station Modules
In order for our customers to bring their products to market faster, Microsemi offers two RF modules incorporating the ZL70103-based MICS-band RF transceiver IC (integrated circuit), which is used for implantable medical applications.
The ZL70123 MICS-Band RF Base Station Module (BSM) is a complete, high-performance, easy-to-use RF module that is based on the ZL70103 MICS-band RF transceiver IC. The ZL70103 is designed to provide good performance while consuming extremely low power. The ZL70123 RF base station module integrates additional circuitry and functionality required to deploy a complete radio solution for external applications. This reduces the complexity of implementing a MICS-band base station to placing one single package on an application board.
The ZL70323 implantable radio module is a second-generation, high-performance, easy-to-use RF module based on the ZL70103 MICS-band RF transceiver IC. The module is extremely small and is designed to provide good performance while consuming very little power. The ZL70323 RF module integrates all the circuitry and functionality required to deploy a complete radio solution for implantable applications. This allows the circuit complexity to be reduced to placing one single package on your implantable application board.
Implantable Communications Systems
Microsemi’s ZL70103 MICS-band RF transceiver IC allows medical device manufacturers to more easily design wireless communication systems supporting advanced applications, including home-based patient remote monitoring and operating room device programming.
The ZL70103 IC operates in the 402-MHz – 405-MHz MICS band to enable wireless links connecting implanted medical devices and control equipment. Previous implanted device communication systems relied on inductive links. These systems have a limited operating range and low data rates, and are not user-friendly for home monitoring applications, as they require the patient to accurately position an inductive wand over the implanted device.
In comparison, the ZL70103’s higher data rate and longer operating range allow medical device manufacturers to enable new value-added services to improve patient care. By supporting higher data rates, patient events can be captured in the implanted device’s memory and quickly uploaded to a base station for analysis to shorten doctor/patient consultancy times. In surgical situations, longer operating range allows the base station (and the programmer) to be located outside the sterile environment.
Longer operating ranges also simplify remote-monitoring applications. As illustrated, an ultra-low-power RF transceiver in a pacemaker can wirelessly transmit patient event and device performance data to a base station in the home. Data is then forwarded over the telephone or internet to a physician’s office. If a problem is detected, the patient goes to the hospital where the high-speed, two-way RF link is used to monitor and adjust device performance under a doctor’s supervision.
Battery life is a critical performance parameter for implanted devices. The ZL70103 transceiver incorporates a “wake-up” receiver that allows the IC to operate in an extremely low current. The ZL70103 consumes less than 6 mA when transmitting or receiving and consumes only 290 nA when in a periodic sleep/sniff mode (1-second sniff interval).
Communication between implanted and base station transceivers is initiated using a specially coded wake-up signal from the 2.45-GHz base transmitter. Alternative wake-up mechanisms using 400-MHz or direct wake-up by the implanted medical device are also supported.
|ZL70103LDG1||48-pin QFN||Yes||Waffle trays, bake, and dry-pack||Production|
|ZL70103UEJ2||49-pin CSP||Yes||Waffle trays||Qualification (Contact Microsemi for availability)|
|ZL70103UBJ||Wire-Bondable die||N/A||Waffle trays||Production (Contact Microsemi for availability)|
|ZLE70103BADA||ZLE70103 Application Development Kit (ADK)||Box||Production|