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