DSP, Micros & Memory


16-bit low power micro with ADC

24 March 2004 DSP, Micros & Memory

Renesas' very low power single-chip 16-bit microcontroller with on-chip flash, the H8/38086F, is based on the H8/300H CPU core and is the company's first micro to incorporate a high-precision delta-sigma type 14-bit ADC. This eliminates the need for an external dedicated high-precision conversion IC. The delta-sigma type ADC is capable of high precision at high resolution, with a 3,0 V full-scale range at ±274 µV (typical) compared with the ±7,3 mV (typical) of a conventional successive approximation type ADC with 10-bit resolution. The converter also features an operating voltage range of 2,2 to 3,6 V and a conversion time of 64,1 to 1282 µs. Peripheral functions include: a programmable gain amplifier; band-gap voltage reference; LCD controller/driver; RTC; and an I2C bus interface. It operates on just 1,8 V, and has eight versatile power-down modes - down to 900 µA (typical) at 1,8 V/1 MHz operation in 'watch' mode, with current dissipation 0,5 µA.



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