Features
 6 channels ADC, 4000 counts, auto-range
measurement
 AC true RMS output, measurement error<0.5% at
2kHz passband corner
 Built-in voltage divider, no external resistor divider
needed
 Programmable multi-functional measurement
network，support voltage, current, resistor, diode,
transistor, open/short, temperature, and capacitor
measurements
 Multi-functional comparator
 8 bits RISC ultra-low power MCU, 49 instructions
and 6 stack levels. The MCU current consumption is
400uA typically at 3.3V and 2MHz operating clock
rate. Standby current is 1.5uA at 32kHz clock, and
less than 1uA at sleep
 16k Bytes OTP for program storage, 256 Bytes
SRAM for data storage
 Low OTP programming voltage, can replace
external EEPROM
 Flexible battery voltage detection range 2.0V~ 3.3V
 Abundant peripheral resources: UART, PWM, PFD,
BUZ, and TIMER
 14SEG × 4COM LCD drive, ultra-low power
consumption and high driving capability,
programmable boost module to maintain luminance
at low supply voltage, support grey scale adjustment.
Support grey scale adjustment
 Every digital I/O port contain Schmitt trigger input
and selectable pull up resistor
 Low voltage detection and power on reset circuit
 Operating voltage range: 2.4V~ 3.6V
 Operating temperature range: -40 ˚C~85 ˚C
 Built-in 8MHz and 32kHz RC oscillators
Description
The SD7500 is a SoC with built-in 24 bit ADC
and 16k Bytes OTP memory. The IC was designed
with ultra-low power technology. Operates at 3.3V
supply and internal RC oscillator frequency, the total
typical operating current is 1.6mA.
It has very rich peripheral resources: selectable
regulated voltage source, flexible ADC setup, voltage
booster, UART, TIMER with CAPTURE capability,
PWM, PFD, and LCD driver.
The OTP can be programmed in situ and the
2.4V~3.6V programming voltage is generated
internally. The OTP can be used in place of external
EEPROM.
Three working modes are provided so users can
select the optimum choice between speed and power.
They are normal mode, standby mode, and sleep mode.
Applications
Manual or auto-range multimeter and similar
measurement applications