Exclusive first teardown on the entire network: What chips are used in the detectors used in hospitals

Latest update time：2024-08-20

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For most people, it is difficult to get access to some specialized medical devices, let alone disassemble them to see what chips are used inside. Recently, EEWorld forum member ylyfxzsx picked up a Roche "cardiac marker detector" from an electronics stall out of curiosity and disassembled it.

After opening it, I found that the interior is very complicated and sophisticated. As the saying goes, "Happiness is better shared than happiness alone", so I took a photo and posted it here for everyone to see. In the end, I found that this product is made in Germany, and it seems that it is not easy to use, and it seems that it is charged by use.

Original post address: https://www.eeworld.com.cn/az94u58

ylyfxzsx｜Author

Fu Bin｜Editor

Electronic Engineering World (ID: EEworldbbs) | Produced

First of all, the model of this product is Roche cardiac marker detector cobas h 232.

According to online information, this product is mainly used to monitor indicators including troponin T, CK-MB (creatine kinase isoenzyme), myoglobin, D-dimer, and NT-proBNP (N-terminal pro-brain natriuretic peptide). It can be seen that these indicators are common monitoring data related to myocardial infarction and heart failure.

The hospital will place this detector for use in the emergency room and ambulance.

I turned it on and tried it out. Not only did it boot up normally, it even had the usage count.

I checked online and found that this instrument requires blood to be drawn from a vein, and then a code chip is inserted into the machine to drip blood vertically for sampling. Finally, the data from the test will be transmitted to the computer's "Roche Stand-Alone Point-of-Care Testing System" software. For us, this data is the source of the data on our usual hospital test forms.

Next, remove the back cover and take a look.

Here is a close-up of the back, which has biochemical markings on it. Non-professionals should not imitate the disassembly operation.

Look at the front PCB, the chips on it are:

MCU: NXP (logo is Freescale) i.MX35 processor, integrated OpenVG™1.1 hardware accelerator, providing smooth texture visual effects. The integration of LCD controller enables high-resolution and high-color display. The camera interface (CMOS sensor interface) allows video input acceptance, taking pictures, streaming video, etc. To reduce BOM cost, it is equipped with connection options including UART, SPI, Ethernet, two controller area networks (CAN), two USB ports with integrated PHY, three MMC/SD/SDIO ports, PATA, CE-ATA, and the ability to connect to external wireless modules through USB or SDIO ports. Support for cost-effective memory options such as DDR2 and multi-level cell NAND can reduce system costs and provide great flexibility for design engineers.

Power Management IC: NXP (logo is Freescale) MC13892CJVL. According to the official datasheet, MC13892 is a power management integrated circuit (PMIC) specially designed for NXP (Freescale) i.MX35 and i.MX51 series. It is also compatible with i.MX27, i.MX31 and i.MX37 application processors. It is powered by SMART MOS technology, supports voltage of 2.8V~4.65V, output current of 2A, 12 LDOs, 10-bit GP ADC, 3-zone LED/RGB driver, 8 ch with 3 GPO ADC inputs, multiplexer and scaling circuit.

FPGA: LATTICE LCHXO2 1200HC 4HG132C A1361R53, 1280 logic cells, 160 logic array blocks, 65536-bit embedded block RAM (EBR).

Voltage level converter: The silk screen shows TI (Texas Instruments) 14C79HTG NK245. Through the silk screen, its model number is SN74LVC16T245ZQLR. From digikey, we can see that this conversion transceiver is a 2-element, 8-bit per element, three-state, Output 56-BGA Microstar Junior (7x4.5).

Memory: Micron IGHI7 D9SBJ.

eMMC: Samsung KLM461FETE-B041, eMMC 5.1, 4 GB capacity, 1.8 / 3.3 V operating voltage, interface HS400, package size 11 x 10 x 0.8 mm operating temperature -25 ~ 85 °C.

Audio codec: NXP (logo is Freescale) SGTL5000, SGTL5000 is a low-power stereo codec that provides a comprehensive audio solution for portable products that require line input, microphone input, line output, headphone output and digital I/O. It has ultra-low power consumption, ultra-high performance and functions, capless headphones and integrated PLL, allowing clock reuse within the system, which can help reduce overall system costs.

As shown in the figure below, we can see that the DC/DC power module is TDK's ICG 12V series D9NMZ, with a 4.5~14V voltage input and 6A current output.