Meter SoC with 8-way 24 bit ADC JHM3802
The JHM3802 is a programmable SOC integrated circuit with 32-bit embedded processor and signal conditioning of sensor.
JHM3802 is a SoC chip specially developed for instrumentation applications. It integrates a 32-bit RISC microprocessor and sensor analog front-end signal processing circuit including low-noise pre-amplifier with configurable gain, an 8-channel 24-bit high-resolution sigma-delta ADC, and a built-in high linearity temperature sensor.
Features
| CPU operating frequency(adjustable) | 100kHz~80MHz |
| Operating voltage | 2.0~5.5V |
| Operating current(20MHz) | <5mA |
| Standby power | <8uA |
| Packaging specification | LQFP48 ETC |
CPU characteristics
One cycle instruction
32-bit high-performance RISC CPU
Maximum operating frequency of CPU 80MHz
The operating frequency can be adjusted from 100KHz to 80MHz
Each interrupt has an interrupt entry, which can reduce the interrupt source query
CPU can work at 32MHz without waiting when running in flash
CPU runs in internal RAM to a true working frequency of 80MHz without waiting
Storage space
64K Byte MTP memory
256 Byte EEPROM
16K Byte SRAM can be used as data or program for fast running
Peripheral Features
8 way ADC
Noise free resolution up to 19 bits
Sampling frequency 1KHz
PGA inside ADC for small signal amplification
Support multiple 1.1~72X
Others
Individual OP
I²C interface
Built in PLL
32-bit RTC
Segment LCD support
4-way independent PWM
Internal POR
UART interface
Built in 4KHz OSC
2-way 32-bit independent Timer
56 GPIOs
SPI interface
2 built-in LDOs
3232-bit WDT
Amorphous USB1.1
Digital Sigma Delta sound (up to 24bit)
JHM3802 Block Diagram
