The function of the fingers is vital in everyday life. Whether it's grasping objects, writing, typing, or performing delicate hand manipulations, the dexterity of the fingers is required. However, it is not as convenient for patients with limited finger function due to accidents, diseases or surgeries.

The Finger Function Rehabilitation Instrument plays a vital role in modern rehabilitation medicine as a highly effective assistive therapy device. It can help patients with impaired finger function to rehabilitate and thus restore their hand function through the comprehensive use of a variety of technological principles.

Electrical stimulation is the most common treatment method in finger rehabilitation devices, and the chip containing the electrical stimulation technology plays a crucial role. By applying low-frequency pulsed current to stimulate the fingers, it activates the brain areas related to hand motor function and promotes the recovery of damaged peripheral nerves in the fingers.

The Nanochap ENS001 chip is a highly programmable stimulation SoC that integrates an ARM Cortex-M0 MCU, an integrated battery charger circuit, a power switch, a high voltage boost converter, and multiple high-compliance stimulation drivers. This design allows the ENS001 chip to generate multiple stimulation waveforms with up to 67mA output current per channel and support multiple stimulation modes.

Principle of the Nanochap Stim Engines Series ENS001 in the Finger Function Rehabilitation Device:

• The Stim Engines Series ENS001 chip in the Finger Rehabilitator applies weak electrical stimuli to the finger through specific electrodes;

• These stimuli can penetrate the skin and act directly on the muscle and nerve tissue of the finger;

• The Stim Engines Series ENS001 chip supports a variety of stimulation modes. By precisely controlling the parameters of the current stimulation, such as frequency, intensity and waveform, it can simulate the electrical signal patterns of different finger movements, thus stimulating the contraction and diastole of the finger muscles, and thus promoting the recovery of the finger motor function.

The use of the ENS001 chip in the Finger Function Rehabilitation Instrument greatly improves the safety of the treatment. The design concept of this chip is very different from that of traditional circuit boards. It adopts the Current Mirror architecture, which creates a push-pull mechanism through the current source and current absorber to generate a biphasic waveform with multiple channels of completely independent charge balance. This waveform not only does not damage the tissue, but also does not corrode the electrodes. At the same time, the chip comes with high temperature, high voltage, high current and other detection and safety guarantee system to ensure the safety and stability of the treatment process.

In addition, the programmable capability of ENS001 chip enables the therapeutic instrument to accurately control the stimulation parameters of microcurrent, such as current intensity, stimulation frequency and waveform, etc., in order to meet the individual needs of different patients. At the same time, the LCD screen driver of the ENS001 chip allows doctors to visualize the parameters and patient feedback during the treatment process through the LCD screen, so as to adjust the treatment plan in a timely manner.

Nanochap Stim Engines Series Programmable Universal Stimulation Chip ENS001 Advantages and Features

Highly integrated, shortening the product development cycle and simplifying the customer's material management.

Charge balance technology, keep the positive and negative half-cycle charge close to balance by charge copying technology.

Small size, more suitable for portable products.

Strong expandability, support multiple channels in parallel to realize multi-mode stimulation.

Integration of current source controller and MCU to make a dedicated electrical stimulation SoC.

Freedom to edit the waveform, all 3 types of drivers can generate any current waveform.

Product Parameters

Operating voltage: 3V - 5V

Operating Temperature: - 40°C - 85°C

Low Power Mode: Sleep mode; Stop mode; Standby mode

ARM core: 32-bit ARM Cortex-M0 CPU with up to 32 MHz frequency

4-channel high current range driver (8 electrodes)

8-channel medium current range driver (16 electrodes)

23-channel low current range driver (24 electrodes)

Digital interfaces: UART*2, I2C*2, SPI*2