HJG2860 Eight-Channel Sixteen-Bit Differential-Input AD Acquisition System
HJG2860 is a fully domestically produced, military‑grade (–55°C to +125°C) 8‑channel, 16‑bit differential‑input A/D acquisition system. It comprises input clamps, a second‑order anti‑aliasing analog filter, a sample‑and‑hold circuit, a 16‑bit charge‑redistribution successive‑approximation ADC, a programmable digital filter, a high‑speed parallel interface, a precision reference source, a low‑dropout regulator, an integrated system processor (ISP), and drivers. It communicates with a host computer via SPI, UART, I²C, and other interfaces, enabling users to rapidly acquire (up to 200 ksps) and process analog signals. The device supports online, non‑intrusive programming, allowing users to leverage its 64 kB flash memory to define custom functionality and implement temperature‑compensation corrections. This circuit is particularly well suited for applications in synchronous high‑speed data acquisition systems, such as rotary steerable drilling, inclinometers, inertial navigation control in aircraft, and multiphase motor control.
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HJG2860 Eight-Channel Sixteen-Bit Differential-Input AD Acquisition System
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Its main features include:
·Synchronous data acquisition across all eight channels facilitates the collection of sensor data at the same moment and from the same spatial location.
·Built-in 64kbit flash Convenient for customers to perform zeroing. / Full scale / Temperature Drift Modeling Correction
·True differential input
·A parallel interface is used for data acquisition, thereby increasing the data sampling rate.
·Single 5V Power supply
·Analog input voltage range ± 5V , ± 10V , true bipolar input
·Low power consumption ≤ 150 mW · CAN/UART Compatible interface, facilitating external communication for customers.
·Dynamic range reaches 105 dB
·Precision 2.5V Reference voltage, maximum temperature drift 5 ppm
· High input impedance ≥ 1M Omega
·Provides oversampling settings to enhance sampling accuracy.
·Analog Input Clamp Protection
· 16 Position, 200ksps ADC( All channels )
·Built-in half-duplex transceiver
·Isolation between channels ≥ -85 dB
·The data acquisition process is programmable.
·Second-order anti-aliasing analog filter
· Low distortion ( -107 dB THD )
· High signal-to-noise ratio ( 98dB SNR )
·Small size ( 40*21.6*5mm 3 )
